What does it mean for a user to access a database through a multi-tier infrastructure?
A. The user opens connections to multiple databases simultaneously
B. The user accesses the database through web or application servers
C. Each user connection to the database is layered to improve performance
D. Multiple levels of access to the database are available to the user

True, in Java, the condition within the parenthesis of an if statement must be a boolean expression or an integer.

The condition within the parenthesis of an if statement in Java is evaluated as either true or false. Therefore, it must be a boolean expression or an integer. If the condition is a boolean expression, it will be evaluated to true or false. If it is an integer, it will be evaluated to true if the integer is not zero and false if it is zero. Any other type of expression will result in a compilation error. It is important to note that the condition within the parenthesis must be surrounded by parenthesis, and the statements within the if block must be enclosed within curly braces.

The condition within the parenthesis of an if statement in Java must be a boolean expression or an integer. Other types of expressions will result in a compilation error.

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External fragmentation refers to the phenomenon where the memory space in a heap becomes fragmented and unusable, even though the total amount of free memory may be sufficient to meet the memory allocation requests.

To calculate the amount of external fragmentation in a heap, we need to determine the total amount of free memory space that is available in the heap, but is not contiguous. This means that the free memory space is divided into smaller chunks that cannot be used to fulfill a large memory allocation request. In the current state of the heap, we need to analyze the memory allocation patterns and the distribution of the free memory chunks. By examining the heap's memory map, we can identify the size and location of each memory block, whether it is allocated or free. Based on this analysis, we can calculate the amount of external fragmentation by summing up the sizes of all free memory blocks that are not contiguous and cannot be combined to form a larger block. The result will be the total amount of memory that is unusable due to external fragmentation. Therefore, to determine the amount of external fragmentation in the current state of the heap, we need to analyze the heap's memory map and calculate the sum of the sizes of all non-contiguous free memory blocks.

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To make it easier to refer to the pricing tables in the Data Tables worksheet, named ranges can be created for each table. The named ranges include Lesson_Pricing (B5:E8), Entry_Fees (H4:J5), Trans_Fees (B12:E15), and Uniform_Fees (B19:G22).

Creating named ranges for the pricing tables in the Data Tables worksheet allows for easier referencing of specific ranges of cells from other worksheets within the workbook. The named ranges provide a more intuitive and meaningful way to identify and refer to the tables. In this case, the following named ranges are created for their respective tables:

Lesson_Pricing: This named range includes the cells B5:E8, covering the range of lesson pricing information.

Entry_Fees: This named range includes the cells H4:J5, covering the range of entry fees data.

Trans_Fees: This named range includes the cells B12:E15, covering the range of transaction fees.

Uniform_Fees: This named range includes the cells B19:G22, covering the range of uniform fees.

By assigning these named ranges to the corresponding tables, it becomes easier to refer to specific ranges of data within the Data Tables worksheet. This facilitates data analysis, formula calculations, and data visualization across different worksheets or formulas within the workbook.

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The logical expression that is equivalent to the statement "there is someone that no one can fool" is option b, which is ¬ƎyⱯx(F(x,y)).

This expression means "it is not the case that there exists a person y such that everyone x can be fooled by y." In other words, there is at least one person who cannot be fooled by anyone. To arrive at this expression, we first translate the original statement as ¬ƎxⱯyF(x,y), using De Morgan's law to get ¬Ǝy¬∀xF(x,y), and then negating the universal quantifier (∀) to get ¬ƎyⱯx(¬F(x,y)). Therefore, option b is the correct choice for a logically equivalent expression to the given statement.

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Catheterization is the process of inserting a thin, flexible tube known as a catheter into the body for various medical purposes. One such purpose is for a hysterosalpingography (HSG), which is a procedure used to examine the uterus and fallopian tubes. During an HSG, a contrast material is introduced into the uterus through the cervix, and X-ray images are taken to detect any abnormalities.

The catheter used for an HSG is typically a specialized one with a balloon on the end that is inflated after insertion to keep it in place. The catheter is gently inserted through the cervix and into the uterus. The contrast material is then slowly introduced through the catheter while X-ray images are taken. The contrast material is visible on the X-ray, allowing the healthcare provider to see any blockages or abnormalities in the uterus and fallopian tubes.

HSG is a relatively quick and non-invasive procedure that is typically performed in an outpatient setting. Some women may experience mild cramping or discomfort during the procedure, but this usually subsides quickly. After the procedure, patients can resume their normal activities immediately.

In conclusion, catheterization is an important part of the HSG procedure, allowing the contrast material to be introduced into the uterus for imaging purposes. HSG can provide valuable information about the health of the reproductive system and help diagnose issues related to infertility.

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The two primary drivers that support the need for network automation are policy-derived provisioning of resources and increasing reliance on self-diagnostic and self-healing. Policy-derived provisioning of resources involves using automation tools to ensure that network resources are provisioned based on predefined policies.

This helps to reduce errors and increase consistency in the network, while also enabling more efficient use of resources. By automating the provisioning process, network administrators can save time and reduce the risk of human error. Increasing reliance on self-diagnostic and self-healing is another key driver for network automation. This involves using automation tools to monitor network performance and detect issues before they become major problems.

By automating the diagnostic and healing processes, network administrators can save time and reduce the risk of downtime caused by manual error. Eliminating training needs, providing a ship entry point for resource provisioning, and reducing hardware footprint are not primary drivers for network automation. While these benefits may be achieved through automation, they are not the main reasons why network automation is necessary. The two primary drivers that support the need for network automation are: Increasing reliance on self-diagnostic and self-healing (Option B)
Network automation enables networks to diagnose and resolve issues automatically, improving efficiency and reducing downtime. Policy-derived provisioning of resources (Option C) Network automation allows for the implementation of policy-based resource provisioning, ensuring that resources are allocated and managed according to predefined rules and guidelines. This streamlines the process and enhances overall network performance. In summary, the two primary drivers supporting the need for network automation are increasing reliance on self-diagnostic and self-healing (B) and policy-derived provisioning of resources (C).

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Examples of vector graphics include A. logos and B. blueprints. Vector graphics are created using mathematical equations and can be scaled up or down without losing their quality. Logos and blueprints are often created as vector graphics because they need to be precise and scalable.

Photos and D. typefaces, on the other hand, are not examples of vector graphics. Photos are raster images, which are made up of pixels, and cannot be scaled up without losing quality. Typefaces, while they can be created as vector graphics, are typically used as raster images in digital media and print. In summary, the examples of vector graphics include logos and blueprints.

examples of vector graphics include: Logos, Blueprints, By configuring the settings, users can set restrictions on who can access certain files or applications, which devices can connect to the computer, and what actions can be performed on the computer. By implementing the security policies, users can increase the overall security of their computer and prevent potential security breaches. True. The Task Scheduler is a tool in Windows operating systems that allows users to automate tasks on their computer. Users can schedule tasks to run at specific times or intervals, start programs or scripts, and stop services. The Task Scheduler can help users save time and improve productivity by automating repetitive tasks. Additionally, users can also use the Task Scheduler to perform maintenance tasks such as system backups or updates. Overall, the Task Scheduler is a useful tool that can help users streamline their workflow and improve the efficiency of their computer.faces Vector graphics are commonly used for these types of designs because they can be easily resized without losing quality. Photos (C) are not vector graphics, as they are raster images composed of pixels.

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A dot matrix printer and a daisy wheel printer are both types of impact printers, which use physical impact to transfer ink onto paper. However, they differ in the way they create the printed characters.

A dot matrix printer uses a print head that contains multiple pins, which strike an ink ribbon against the paper to form dots that make up the characters. The pins move horizontally and vertically to create each dot, and the number of pins determines the resolution of the printout. Dot matrix printers are known for their durability and ability to print on multi-part forms, but they produce low-quality, noisy printouts and are becoming less common due to the availability of more advanced printing technologies.

A daisy wheel printer, on the other hand, uses a circular disk with individual characters arranged around the edge, similar to a typewriter. When a character is selected, a hammer strikes the disk against an ink ribbon and paper to transfer the ink and form the character. Daisy wheel printers produce high-quality printouts with a consistent, typewriter-like appearance, but they are slower and less versatile than other printing technologies.

In summary, the main differences between dot matrix printers and daisy wheel printers are the way they create printed characters, the quality of the printouts, and their speed and versatility.

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When managing a network that uses IPv6 addressing, there are several methods for address assignment. In your specific scenario, clients connect devices to the network, generate an interface ID, and use NDP (Neighbor Discovery Protocol) to learn the subnet prefix and default gateway.

The IPv6 address assignment method being used in this situation is called Stateless Address Autoconfiguration (SLAAC). SLAAC allows devices to automatically generate their own IPv6 addresses by combining a network prefix, learned from NDP, with their own generated interface ID. This enables the device to have a unique IPv6 address without needing a manual configuration or the involvement of a DHCP server. In the network scenario you provided, the IPv6 address assignment method being used is Stateless Address Autoconfiguration (SLAAC), as it allows clients to generate their own interface ID and use NDP to learn the subnet prefix and default gateway.

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The statement "For compiled programming languages, a package must contain the source code" is true.

This is because compiled programming languages, such as C++, Java, and others, convert the source code into machine code or bytecode, which can be executed directly by the computer. However, in order to compile the source code, the package must contain the necessary source code files. Without the source code, it is impossible to compile the program and create the executable file. Therefore, it is essential for compiled programming language packages to include the source code. In conclusion, the answer to this question is A - Yes.

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False. Scheduling algorithms are typically implemented in the input port of a router, not in the output port.

The purpose of a scheduling algorithm is to manage the incoming packets and determine the order in which they are transmitted from the input port to the output port of a router.

In the input port, the scheduling algorithm decides which packet should be transmitted next based on certain criteria such as priority, fairness, or quality of service requirements. It helps in managing the contention for the shared resources within the router.

Once the packet is selected by the scheduling algorithm in the input port, it is then forwarded to the appropriate output port for transmission. The output port of a router is responsible for physically transmitting the selected packet to its destination.

Therefore, scheduling algorithms are primarily implemented in the input port of a router, not in the output port.

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(a) Player 1's expected payoffs for the mixed strategy 2/3T + 1/3B are:

Against Player 2 choosing L: (2/3)(0) + (1/3)(4) = 4/3

Against Player 2 choosing R: (2/3)(2) + (1/3)(5) = 9/3

Player 1's payoff for pure strategy M is 1 in both cases. Therefore, the mixed strategy 2/3T + 1/3B dominates pure strategy M for Player 1.

(b) After deleting M, Player 1 has pure strategies T and B. To find the mixed-strategy Nash equilibrium, we solve for the probabilities p and 1-p that make Player 2 indifferent between choosing L and R. By comparing the expected payoffs for Player 2, we can determine that the equilibrium is:

Player 1 plays T with probability 2/3 and B with probability 1/3.

Player 2 plays L with probability 1/5 and R with probability 4/5.

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To change the background color of a button on a button click, one can

To alter an element's background color on click, one can also:

Lastly, Set the event as well as the target,  style of the background Color property to the the said background color.

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Here is an algorithm to design a bounded-buffer monitor with the buffer itself embedded within the monitor.

The monitor is a synchronization construct that allows threads to have both mutual exclusion and the ability to wait (block) for a certain condition to become true. Monitors also have a mechanism for signaling other threads that their condition has been met.

A bounded buffer is a classic example of a multi-process synchronization problem. The buffer is a fixed-size array of data (for example, integers). Two types of processes can access the buffer: producers can put items into the buffer, and consumers can take items out of the buffer.

In this design, the monitor will contain a buffer of a fixed size, and two routines: one for depositing an item into the buffer and one for removing an item from the buffer.

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A:  The method signatures for setCenter and setRadius are missing the return type.

There is a semicolon after the class declaration, which should be removed

Corrected code:

class Circle {

 private:

   double centerx;

   double centery;

   double radius;

 public:

   void setCenter(double x, double y);

   void setRadius(double r);

};

void Circle::setCenter(double x, double y) {

 centerx = x;

 centery = y;

}

void Circle::setRadius(double r) {

 radius = r;

}

B:  There is a semicolon after the class declaration, which should be removed

There should not be a semicolon after "Private" in the class declaration

The function definition for moonweight is missing a return type

The input operator (>>) and output operator (<<) in the main program are reversed

Corrected code:

class Moon {

 private:

   double earthweight;

   double moonweight;

 public:

   Moon(double ew); // Constructor

   double getMoonweight();

};

Moon::Moon(double ew) {

 earthweight = ew;

 moonweight = earthweight / 6;

}

double Moon::getMoonweight() {

 return moonweight;

}

int main() {

 double earth;

 cout << "What is your weight? ";

 cin >> earth;

 Moon lunar(earth);

 cout << "On the moon you would weigh " << lunar.getMoonweight() << endl;

}

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The term "nomophobia" was coined by British researcher and psychologist, Dr. David Pittman, to describe the fear of being without one's smartphone.

Pittman conducted a study in 2010 which revealed that 53% of mobile phone users in the UK experienced anxiety when they lost their phone, ran out of battery, or had no network coverage. He later defined nomophobia as "a 21st-century phobia" and a "new term to describe the fear of being out of mobile phone contact."
Nomophobia has become a common phenomenon in today's society, as smartphones have become ubiquitous and essential tools for communication, entertainment, and work. People with nomophobia experience symptoms such as restlessness, irritability, panic, and even physical discomfort when they are separated from their phones or cannot use them. The fear of missing out (FOMO) on important updates, messages, or social media notifications also contributes to the development of nomophobia.
Several studies have highlighted the negative impact of smartphone addiction and nomophobia on mental health, sleep, relationships, and productivity. It is important to recognize the signs of nomophobia and to take steps to reduce the dependence on smartphones, such as setting boundaries, using digital detox strategies, and seeking professional help if necessary.

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One type of social media platform that has limited public interaction is a private or closed social network.

A social media platform that has restricted public engagement is a private or enclosed social network. Generally, users need an invitation or authorization to participate in these channels, and their activities and posts are only viewable to authorized members.

Some examples of such platforms could be the exclusive online communities or certain collaboration tools for workplaces. These platforms ensure privacy and exclusivity by limiting access and interactions to a specific group of individuals, thus fostering more intimate communication within the community instead of public interactions.

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The correct answer is False.A VLAN network assigns computers to LAN segments by hardware.

A VLAN (Virtual Local Area Network) network assigns computers to LAN segments virtually rather than by hardware. VLANs use network switches and software-based configuration to group devices into logical network segments, regardless of their physical location. This allows for flexible network management and improves security by segregating network traffic.The assignment of computers to VLANs is typically done based on logical criteria such as department, function, or security requirements, rather than hardware. VLAN membership is usually determined by configuring network switches or routers to assign specific ports or network segments to a particular VLAN.

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The correct answer is: (b) the intermediary sends packets to the target system with the spoofed source address.

A spoofing attack, the intermediary is unaware that the source address has been falsified and forwards the packets to the target system. This can lead to a variety of security issues, such as data theft, denial of service attacks, and more. To prevent spoofing attacks, it is important to implement security measures such as packet filtering and source address verification.

In this type of attack, adversaries send packets to an intermediary (e.g., a server) with a spoofed source address of the actual target system. The intermediary, unaware of the spoofed address, sends packets to the target system using the provided (spoofed) source address.

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False. This statement is not entirely accurate. PaaS (Platform as a Service) can provide additional resources such as memory, but it typically does not do so by changing pricing tiers. Instead, users can typically scale up or down their resource usage based on their needs.

This may involve increasing or decreasing the amount of memory allocated to their application, but it is not always tied to changing pricing tiers. The specific methods for scaling resources may vary depending on the PaaS provider and the specific service plan being used.

PaaS does provide additional memory to apps by changing pricing tiers. When you upgrade to a higher pricing tier, you get access to more resources, such as memory and computing power, allowing your app to perform better and handle more users or tasks simultaneously.

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PHP, ASP.NET, and Python. These three languages are widely used for server-side scripting, allowing developers to create dynamic web pages and web applications.

A further explanation of each of these languages. PHP is a server-side scripting language that is popular for creating dynamic web pages and web applications. It is easy to learn and has a large community of developers. ASP.NET is a web framework developed by Microsoft for building dynamic web applications and services. It is based on the .NET framework and can be used with languages such as C# and VB.NET. Python is a high-level programming language that is often used for web development. It has a simple syntax and can be used for a variety of applications, including server-side scripting. An of the other options would also be helpful. C and C++ are programming languages that can be used for server-side scripting, but they are typically used for system programming and may not be as well-suited for web development. CGI (Common Gateway Interface) is a protocol that allows web servers to run external programs and is often used for server-side scripting, but it is not a programming language. JScript, Livescript, and ECMAScript are all scripting languages that are used for client-side scripting (i.e. running scripts on the user's web browser), not server-side scripting. VBS (Visual Basic Scripting) and JScript (Microsoft's implementation of JavaScript) are also scripting languages primarily used for client-side scripting.

The more popular server-side scripting languages include: PHP, ASP.NET, and Python.c. PHP, ASP.NET, and Python Server-side scripting languages are used to manage server-side operations, such as processing data, generating dynamic content, and handling user interactions. PHP, ASP.NET, and Python are widely used for these purposes due to their versatility, efficiency, and large user communities. While other options like a. C, C++, and CGI, b. JScript, Livescript, and ECMAScript, and d. VBS and JScript might have some server-side functionality, they are either outdated, used more commonly for client-side scripting, or not as popular as PHP, ASP.NET, and Python for server-side operations.

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The statement is false. PLA (Programmable Logic Array) and PAL (Programmable Array Logic) chips are not referred to as complex programmable logic devices (CPLDs).

PLA and PAL chips are types of programmable logic devices (PLDs), but they are not considered as complex programmable logic devices (CPLDs). PLDs are integrated circuits that can be programmed to perform specific logic functions, such as implementing combinational and sequential logic. A PLA consists of an array of programmable AND gates followed by programmable OR gates, allowing for the implementation of complex logic functions. On the other hand, a PAL has a programmable AND array and a fixed OR array. Both PLA and PAL chips provide programmable logic capabilities, but they have limitations in terms of their complexity and flexibility compared to CPLDs.

CPLDs, or complex programmable logic devices, are a more advanced type of programmable logic device. They offer a higher level of logic capacity and flexibility, typically including a larger number of programmable logic blocks, input/output pins, and embedded memory. CPLDs also often have additional features like clock management resources and on-chip debugging capabilities. Therefore, while PLA and PAL chips are types of programmable logic devices, they are not referred to as CPLDs due to their simpler architecture and limited capabilities.

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To properly identify and classify the different features of blood components, you must first understand the different parts of blood. Blood is composed of red blood cells, white blood cells, platelets, and plasma.

Red blood cells, also known as erythrocytes, carry oxygen from the lungs to the rest of the body. They contain hemoglobin, a protein that binds with oxygen.

White blood cells, or leukocytes, help the body fight off infections and diseases. There are different types of white blood cells, including lymphocytes, monocytes, neutrophils, eosinophils, and basophils.

Platelets, also called thrombocytes, are responsible for blood clotting. They stick together to form a clot and prevent excessive bleeding when you're injured.

Finally, plasma is the liquid component of blood. It contains water, proteins, electrolytes, and hormones, among other substances.

Now that we have a basic understanding of the different components of blood, we can properly drag and drop the different features to their appropriate blood component. For example, you could drag "hemoglobin" to "red blood cells," "neutrophils" to "white blood cells," "platelet aggregation" to "platelets," and "electrolytes" to "plasma."

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SS and Atom are popular specifications used to distribute content, such as web feeds, to subscribers. The stated statement is TRUE

SS and Atom are both popular specifications used for syndicating web content to subscribers. Both are XML-based formats that allow publishers to distribute their content in a standardized way. RSS, or Rich Site Summary, is the older of the two specifications and was first created in 1999. Atom, on the other hand, was introduced in 2003 and was designed to address some of the limitations of RSS. Both specifications are widely used by bloggers, news websites, and other publishers to distribute content to subscribers who can then consume it in a variety of ways, including through specialized feed readers, web browsers, and other applications.

In conclusion, the statement that SS and Atom are popular specifications used to distribute content, such as web feeds, to subscribers is TRUE. Both specifications are widely used by publishers to syndicate their content and are an important part of the web ecosystem.

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The statement that is not true is "strings passed as const char* can be modified by the function."

When a string is passed as a const char* argument, it means that the function cannot modify the content of the string. The const keyword is used to indicate that the value of the variable cannot be changed by the function. Therefore, any attempt to modify the string will result in a compilation error.

On the other hand, when a string is passed as a char* argument, the function can modify the content of the string. This is because the char* type does not have the const keyword, and therefore, it allows the function to modify the value of the string.

It is also true that each string library function operates on one or more strings. String library functions are designed to perform operations on strings, such as copying, comparing, concatenating, and searching.

In summary, a char* can be passed as a const* argument, but strings passed as const char* cannot be modified by the function. It is also important to note that each string library function operates on one or more strings.

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The correct option that refers to the location and management of cloud infrastructure is (2) Deployment. This term specifically refers to the process of setting up and configuring the various components of a cloud infrastructure, including the physical servers, storage systems, and networking components,

in order to ensure that they work together seamlessly to support the delivery of cloud services. In other words, deployment is the main answer to your question. To provide a more detailed explanation, it's important to understand that cloud infrastructure typically consists of a complex network of interconnected servers, storage devices, and other hardware and software components that are responsible for delivering cloud-based services to end-users. These components must be carefully managed and optimized in order to ensure that they are functioning at peak efficiency and reliability. This is where deployment comes in - it involves the installation, configuration, and management of these various components, as well as the allocation of resources such as CPU, memory, and storage to support the different workloads running in the cloud environment.

In summary, the correct answer to your question is Deployment, and this term encompasses a wide range of activities related to the location and management of cloud infrastructure. I hope this long answer helps to clarify this topic for you!Deployment refers to the location and management of cloud infrastructure. It involves the process of setting up, configuring, and managing the resources required to run applications in a cloud environment. This includes selecting the appropriate infrastructure, configuring security settings, and monitoring performance.

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While applying a tourniquet to stop life-threatening bleeding in a child, it is not uncommon for them to start crying and telling you that it hurts, especially before the bleeding is fully controlled.

It is important to reassure them and let them know that you are doing everything possible to help them. In addition to providing reassurance, you should also check the tourniquet to make sure that it is not too tight. If it is causing excessive pain or discomfort, it may be necessary to loosen the tourniquet slightly to relieve the pressure. However, it is important to remember that the tourniquet should only be loosened if absolutely necessary, as it is the most effective way to control life-threatening bleeding. If the bleeding is not fully controlled, it may be necessary to continue tightening the tourniquet until you can no longer tighten it any further. However, it is important to monitor the child closely and seek medical attention as soon as possible, as prolonged use of a tourniquet can cause tissue damage and other complications.

when applying a tourniquet to a child experiencing life-threatening bleeding, and they start to cry, indicating pain before the bleeding is controlled. Here's the answer: In this situation, you should continue to tighten the tourniquet until the bleeding is controlled. It's crucial to prioritize stopping the life-threatening bleeding, despite the child's discomfort. While providing reassurance, make sure to maintain the tourniquet's effectiveness in controlling the bleed.

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An internet search engine is a software tool that is designed to search and locate information on the World Wide Web.

The primary purpose of search engines is to retrieve relevant content based on the keywords or phrases entered by users. The three basic tasks that an internet search engine can perform are crawling, indexing, and ranking.

Crawling is the process of collecting information from websites on the internet. Search engines use web crawlers to scan the internet for new content and update their database accordingly. Indexing involves organizing the information collected by the web crawler and storing it in a searchable format. Search engines use complex algorithms to determine the relevance and importance of each webpage, and this information is used to rank the pages in the search results. Ranking is the process of sorting the search results based on their relevance and popularity.

In summary, an internet search engine performs three basic tasks: crawling, indexing, and ranking. These tasks enable search engines to provide users with relevant and accurate results when they search for information on the internet.

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A database is a collection of associated files that functions as a basis for retrieving information. A database is an organized collection of data that can be easily accessed, managed, and updated. The correct answer to this question is "a) database".

It consists of tables, fields, and relationships between data. Databases are used to store and retrieve large amounts of information, such as customer data, inventory, financial records, and much more. They are commonly used in businesses, organizations, and institutions to manage their operations efficiently. On the other hand, spreadsheets, presentations, and word processing documents are other types of computer software that are used for specific purposes, such as analyzing data, creating presentations, and writing documents. However, they do not have the same level of functionality and versatility as a database.

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It is not possible to draw a simple undirected graph g with 3 connected components and 66 edges because of the relationship between the number of edges and the number of connected components in a graph.

In a simple undirected graph, the maximum number of edges can be determined using the formula n(n-1)/2, where n is the number of vertices. In this case, with 12 vertices, the maximum number of edges would be 12(12-1)/2 = 66.If a graph has 66 edges, it means it has the maximum number of edges possible for 12 vertices. This indicates that the graph is a complete graph, where every vertex is connected to every other vertex. In a complete graph, all vertices are in the same connected component, and therefore, it cannot have 3 connected components.

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