where do hackers often find information that they use to customize their attacks

The java code that  creates a generic class that stores two generic objects and name the generic class after your last name is

public class MyClass<T1, T2> {

  private T1 object1;

  private T2 object2;

  public MyClass(T1 obj1, T2 obj2) {

     this.object1 = obj1;

     this.object2 = obj2;

  }

  public T1 getObject1() {

     return this.object1;

  }

  public T2 getObject2() {

     return this.object2;

  }

  public void setObject1(T1 obj1) {

     this.object1 = obj1;

  }

  public void setObject2(T2 obj2) {

    this.object2 = obj2;

  }

}

Generics are a generic programming feature that was added to the Java programming language in version J2SE 5.0 in 2004.

They were created to supplement Java's type system by allowing "a type or method to operate on objects of various types while providing compile-time type safety."

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The cellular technology that combines HSPA and EV-DO to provide higher data speeds is called HSPA+. It is an enhanced version of HSPA (High-Speed Packet Access) and EV-DO (Evolution-Data Optimized) that offers improved data transfer rates for mobile networks.

HSPA+ combines the best features of both HSPA and EV-DO, leveraging multiple input and multiple output (MIMO) technology and advanced modulation schemes to increase data speeds. It achieves higher peak data rates and throughput compared to its predecessors, enabling faster downloads and uploads on mobile devices.

HSPA+ is considered a 3G technology and serves as a transitional step between 3G and 4G networks. It provided a significant boost in data speeds and capacity, allowing users to enjoy better multimedia experiences and support bandwidth-intensive applications on their mobile devices.

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True. The CERT Coordination Center (CERT/CC) is a well-known organization that focuses on internet security.

They are responsible for analyzing and responding to major security incidents and vulnerabilities. The CERT/CC website provides valuable information about internet security breaches, including details about reported incidents, vulnerabilities, best practices, advisories, and other resources to help organizations and individuals enhance their cybersecurity measures.

Their goal is to raise awareness, provide guidance, and assist in managing and mitigating the risks associated with internet security breaches. Therefore, it is true that the website for CERT/CC provides information about internet security breaches.

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The correct answer is Functionally complete sets of logical connectives are sets of connectives that can be used to express all possible truth functions.

In other words, any logical function can be expressed using only the connectives in a functionally complete set.Here are some groups of equations and their corresponding sets of logical connectives:AND, NOTThis is a functionally complete set of logical connectives. It can be used to express any logical function.OR, NOTThis is a functionally complete set of logical connectives. It can be used to express any logical function.NANDThis is a functionally complete set of logical connectives. It can be used to express any logical function.NORThis is a functionally complete set of logical connectives. It can be used to express any logical function.XOR, NOTThis is not a functionally complete set of logical connectives. It cannot express all possible truth functions. For example, the logical function "if A then B" cannot be expressed using only XOR and NOT.

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True. The specific order that values are inserted into a heap will not affect the internal ordering of the elements in an array-based representation of the heap.

In an array-based representation of a heap, the specific order in which values are inserted does not affect the internal ordering of the elements. The heap structure is maintained based on the heap property, which ensures that the parent nodes have a specific relationship with their child nodes. The array is organized in a way that allows efficient access and manipulation of elements according to the heap property. When inserting values into a heap, they are placed in the next available position in the array and then adjusted (if necessary) to satisfy the heap property. The order in which the values are inserted may change the specific arrangement of elements in the array, but the overall internal ordering, determined by the heap property, remains consistent regardless of the insertion order.

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False. In IPsec, a new Security Association (SA) is not established for each packet in the stream. Once the initial SA is negotiated between the hosts, subsequent packets within the same session or flow can reuse the existing SA. This allows for efficient and streamlined communication without the need to establish a new SA for each packet.

IPsec is a protocol suite used to secure IP communications by providing encryption, authentication, and integrity protection. When hosts A and B establish a communication session, they negotiate a Security Association (SA) that defines the security parameters for the session, such as encryption algorithms, authentication methods, and keying material. The SA is typically established using a protocol like IKE (Internet Key Exchange).

Once the SA is established, it remains valid for the duration of the session. This means that subsequent packets within the same session can use the existing SA to encrypt, authenticate, and protect the data. Establishing a new SA for each packet would introduce unnecessary overhead and would not be practical for efficient communication.

Therefore, in IPsec, a new SA is not established for each packet sent in the stream. The existing SA is reused for subsequent packets within the same session, ensuring secure and efficient communication.

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Apache Atlas is an open-source tool designed to manage and organize metadata associated with data assets in an enterprise. It provides a centralized platform for versioning data and annotating it with relevant metadata.

With Apache Atlas, you can track changes and versions of data assets, ensuring transparency and traceability throughout the data lifecycle. It allows you to define metadata attributes, such as data source, format, quality, lineage, and ownership, which help in understanding the data and its context.

By using Apache Atlas, you can establish a comprehensive data governance framework within your organization. It enables collaboration among data stewards, data scientists, and other stakeholders by providing a shared understanding of data assets through metadata annotations.

Moreover, Apache Atlas integrates with other data management and processing tools, such as Apache Hadoop, Apache Spark, and Apache Hive, allowing seamless metadata exchange and integration across the data ecosystem.

In summary, Apache Atlas serves as a powerful open-source tool for versioning data and enriching it with metadata, facilitating data governance, collaboration, and understanding within an organization.

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The correct answer is the "hypervisor," as it is responsible for managing and overseeing each virtualized entity within a virtual environment.

In a virtual environment, there are several virtualized entities that are managed and overseen by a specific component. It is important to understand which component is responsible for this task in order to ensure the smooth functioning of the virtual environment. The component that manages and oversees each of the virtualized entities in a virtual environment is known as the virtual controller. The virtual controller is responsible for managing the virtual machines, virtual networks, and virtual storage devices. It ensures that the virtual machines are running properly and that they are able to communicate with each other through the virtual networks. The virtual controller also manages the allocation of resources such as CPU, memory, and storage to the virtual machines. The virtual controller is often integrated with the hypervisor, which is the component that allows multiple virtual machines to run on a single physical machine. The hypervisor provides a layer of abstraction between the virtual machines and the physical hardware, allowing multiple virtual machines to run on the same physical machine without interfering with each other. V-Manager is a tool used for managing virtual machines. It provides a user interface for administrators to monitor and manage virtual machines, including provisioning new virtual machines, managing storage and networking resources, and monitoring performance.

In conclusion, the virtual controller is the component that manages and oversees each of the virtualized entities in a virtual environment. It is often integrated with the hypervisor and is responsible for managing the virtual machines, virtual networks, and virtual storage devices. The v-manager is a tool used for managing virtual machines, but it is not the component responsible for managing and overseeing the virtualized entities in the virtual environment.

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False. While matplotlib can accept data in the form of pandas dataframes, series, or numpy arrays, it can also plot data in other formats like lists, tuples, or even plain arrays.

Matplotlib is a data visualization library for Python that can plot various types of data, including pandas dataframes, series, and numpy arrays. However, it can also plot data in other formats like lists, tuples, or even plain arrays. Matplotlib provides many plotting options, including line, scatter, bar, and histogram plots. It can also be used to create more complex visualizations, such as heatmaps and 3D plots. Overall, matplotlib is a versatile library that can handle a wide range of data formats and plot types.

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In order to locate rows selected by a query, an index scan reads index blocks sequentially

In order to locate rows selected by a query, an index scan reads index blocks sequentially or selectively, depending on the specific query and index structure.

During an index scan, the database system accesses the index blocks that store the index entries relevant to the query's search condition. The index blocks contain key-value pairs, where the keys represent the indexed column values, and the values point to the corresponding rows in the table.

The type of index scan performed depends on the query's search condition and the index organization. Sequential index scan involves  reading index blocks in a predetermined order, such as following the physical order of the index entries. Selective index scan, on the other hand, selectively reads index blocks that satisfy the query's search condition, using techniques like binary search or range scan.

By traversing the index blocks, the database system can efficiently locate the rows that match the query's search condition. Once the relevant index blocks are read, the corresponding rows can be retrieved from the table, allowing for efficient data retrieval and query execution.

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The type of disk drive redundancy that uses separate controller cards for each disk and duplicates the contents of one disk to a second disk is called disk mirroring or RAID 1 (Redundant Array of Independent Disks 1).

In disk mirroring, each disk in the system has its own dedicated controller card, allowing for independent operation. The contents of one disk are mirrored or duplicated onto a second disk in real-time, ensuring that both disks have identical data. This redundancy provides data protection and fault tolerance, as if one disk fails, the other disk can seamlessly take over.

Disk mirroring offers advantages such as high data availability, fast read performance, and simple data recovery in case of a disk failure. However, it comes at the cost of increased storage requirements since each disk is duplicated.

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The most important consideration when employing a signature-based intrusion detection system is C) Signatures and rules must be kept up to date to protect against emerging threats.

The concern with false positives is an important consideration when employing a signature-based intrusion detection system. False positives occur when the system incorrectly identifies benign activity as malicious, which can result in legitimate traffic being blocked or rejected. This can cause disruptions to normal business operations, which can have a negative impact on the organization.

While each of these considerations is important when employing a signature-based intrusion detection system, the most critical consideration may vary depending on the specific needs and environment of the organization. However, keeping signatures and rules up to date is likely the most universally important consideration, as it ensures that the system is able to detect the latest and most relevant threats.

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The optimal block size for a cache with constant miss latency will depend on the specific characteristics of the program and the cache itself.

The block size of a cache refers to the amount of data that is loaded into the cache each time a memory access is made. A larger block size means that more data is loaded into the cache, which can reduce the number of cache misses. However, a larger block size also means that more data is loaded into the cache that may not be needed, which can result in wasted space and increased cache pollution.

In the context of cache memory, the optimal block size for constant miss latency depends on various factors like cache size, associativity, and access patterns. However, larger block sizes can reduce the miss rate due to increased spatial locality exploitation. But if the block size is too large, it may lead to cache pollution and increased miss rates.

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In web-based e-mail, messages are typically displayed and saved as web pages. Therefore, option D is correct.

Web-based email is a type of email service that allows users to access their email accounts through a web browser rather than using a dedicated email client. This means that users can access their emails from anywhere with an internet connection without the need for additional software.

When a user logs in to their web-based email account, their messages are typically displayed in a web page format that allows them to read, reply, forward, or delete emails.

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When a dataset has invalid attributes or missing/incorrect data, the data is said to be Dirty data

Dirty data refers to data that is inaccurate incomplete inconsistent or contains errors or duplicates dirty data can negatively impact the accuracy and reliability of any analysis reporting or decision making based on the data.

Data cleaning or data cleansing is the process of identifying and correcting or removing dirty data from a dataset to ensure its accuracy and reliability

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Since the motherboard is not compatible with Windows 11, the best solution for George would be to install a different operating system that is compatible with the motherboard. He could try installing an earlier version of Windows or a different operating system like Linux that is compatible with the motherboard. Alternatively, he could try upgrading the motherboard to a newer model that is compatible with Windows 11 if it is feasible and within the client's budget.

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For a variable of the class Scooter to be instantiated, the code must call the constructor in Scooter.

This constructor is defined as public scooter(int w) and takes an integer argument. The constructor initializes the instance variable numWheels with the value of the argument passed to it.

There is no requirement for a default constructor to be defined in the Scooter class, as long as the defined constructor can be called with appropriate arguments.

There is no requirement for Scooter to implement a method called getNumWheels(), although this method is declared in the vehicle interface. However, if the Scooter class wants to implement the vehicle interface, it must define the getNumWheels() method in addition to the getNumWheels() method already defined in the interface.

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Cloud computing is defined by all of the following:

On-demand delivery of computing services over the internet

Pay-as-you-go pricing model

Access to a variety of applications and services

Ability to scale resources up or down as needed

Availability of storage, computing power, and networking capabilities

Ease of use and accessibility for users from anywhere with an internet connection.

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To streamline user access control for your storage operations group and reduce the labor of adding and removing users, I would recommend implementing an Identity and Access Management (IAM) solution. IAM provides centralized control and management of user access to various resources, including storage buckets.

With IAM, you can create custom roles or access policies that define the specific permissions required for managing storage buckets. You can then assign these roles to users or groups based on their job roles or responsibilities. This allows for fine-grained control over user access and eliminates the need for manual intervention when granting or revoking access rights. Additionally, IAM solutions often provide features like automated provisioning and deprovisioning, which can streamline the process of adding and removing users from the object storage management group. Integration with your existing user directory or identity provider can further simplify user management by automatically synchronizing user accounts and permissions. By implementing an IAM solution, you can enhance security, improve operational efficiency, and reduce the administrative overhead associated with user access control for your storage operations group.

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void inputarray(int alpha[]);

void doublearray(const int alpha[], int beta[]);

void copyalphabeta(const int alpha[], const int beta[], int matrix[][20]);

void printarray(const int arr[], int size);

int main() {

   int alpha[20];

   inputarray(alpha);

   int beta[20];

   doublearray(alpha, beta);

   int matrix[10][20];

   copyalphabeta(alpha, beta, matrix);

   cout << "alpha: ";

   printarray(alpha, 20);

   cout << "beta: ";

   printarray(beta, 20);

   cout << "matrix:\n";

   for (int i = 0; i < 10; i++) {

       printarray(matrix[i], 20);

   }

   return 0;

}

void inputarray(int alpha[]) {

   cout << "Enter 20 numbers:\n";

   for (int i = 0; i < 20; i++) {

       cin >> alpha[i];

   }

}

void doublearray(const int alpha[], int beta[]) {

   for (int i = 0; i < 20; i++) {

       beta[i] = 2 * alpha[i];

   }

}

void copyalphabeta(const int alpha[], const int beta[], int matrix[][20]) {

   for (int i = 0; i < 5; i++) {

       for (int j = 0; j < 20; j++) {

           matrix[i][j] = alpha[j];

       }

   }

   for (int i = 5; i < 10; i++) {

       for (int j = 0; j < 20; j++) {

           matrix[i][j] = beta[j];

       }

   }

}

void printarray(const int arr[], int size) {

   for (int i = 0; i < size; i++) {

       cout << arr[i] << " ";

       if ((i+1) % 15 == 0) {

           cout << endl;

       }

   }

   cout << endl;

}

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When operating a VHF marine radio, the term "mayday" should be used in emergency situations.

According to EQ-47, the recognized distress signal in maritime communication is "mayday." It is an internationally recognized term that indicates a vessel, aircraft, or person is in grave and imminent danger and requires immediate assistance.

The term "mayday" is reserved for situations where there is an immediate threat to life or property. It should only be used in critical emergencies, such as when a vessel is sinking, there is a risk of collision, someone is injured or overboard, or any other life-threatening situation.

When transmitting a distress call using a VHF marine radio, it is important to clearly and calmly state "mayday" three times, followed by relevant information.

This information includes the vessel's name, position, nature of the emergency, number of people on board, and any other details that can assist rescuers in understanding the severity of the situation.

Using the term "mayday" alerts other vessels, the coast guard, or nearby stations that immediate assistance is required. It triggers an urgent response and ensures that proper search and rescue operations are initiated promptly.

However, it is crucial to use the term "mayday" responsibly and only in genuine emergencies. False distress calls can divert valuable resources, endanger lives, and may even be illegal, leading to penalties.

It is crucial to use it judiciously and provide accurate information to ensure prompt and effective assistance.

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It's up to the developers and community of each distribution to decide which approach aligns best with their overall goals and values.

The decision to use either sudo or allow access to the root user varies among different flavors of Linux due to their individual philosophy and design principles. Some distributions, like Ubuntu and Debian, prefer the use of sudo as it promotes a more secure system by requiring users to authenticate themselves before executing root-level commands. It also gives administrators more granular control over who can access the root user privileges. On the other hand, some Linux distributions, like Arch and Gentoo, prioritize user choice and flexibility and therefore allow direct access to the root user. This can be useful for advanced users who need full control over their system and prefer not to be slowed down by the extra step of using sudo. Ultimately, it's up to the developers and community of each distribution to decide which approach aligns best with their overall goals and values.

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In Apple Photos on a Mac computer, instead of selecting the small "i" in the circle on the top bar, you can select the "Window" drop-down menu.

This menu is located in the top left corner of the screen, next to the Apple logo. When you click on it, a drop-down list will appear with a variety of options, including "Info", which is the same as clicking on the "i" in the circle.
However, the "Window" menu also offers additional options that can be helpful when organizing and editing your photos.

For example, you can select "Projects" to see all of your current photo projects, such as books or calendars. You can also select "Faces" to view and tag the people in your photos, or "Places" to see a map of where your photos were taken.
Additionally, the "Window" menu allows you to open multiple windows at once, which can be useful when working with multiple photos or projects at the same time.

You can select "New Window" to open a new instance of the Photos app, or "Duplicate Window" to create a copy of the current window.
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When a client's computer is infected with malicious software that connects to a remote computer to receive commands, the network created with infected computers is called a botnet.

A botnet is a collection of compromised computers, often referred to as "bots" or "zombies," that are controlled by a central command-and-control server operated by a cybercriminal. These infected computers, known as "bot hosts," are typically compromised through various means, such as malware infections or exploiting security vulnerabilities. Once a computer becomes part of a botnet, it can be remotely controlled by the botnet operator to carry out malicious activities without the knowledge or consent of the owner. These activities may include sending spam emails, launching distributed denial-of-service (DDoS) attacks, stealing sensitive information, spreading malware, or engaging in other forms of cybercrime.

Botnets are a significant threat to cybersecurity as they can leverage the combined computing power of multiple compromised systems to execute large-scale attacks. Detecting and mitigating botnets require proactive security measures, including regular software updates, strong anti-malware protection, network monitoring, and user education to prevent infection and limit the impact of botnet-related threats.

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If system and data security is not a high priority for a family-run small store, the best cloud computing option would likely be public cloud computing.

Public cloud computing involves using third-party cloud service providers to host and manage computing resources and data over the internet. Public clouds are designed to be scalable, flexible, and cost-effective, with resources shared among many customers to reduce costs. Since the cloud provider is responsible for the security and maintenance of the underlying infrastructure, the small store would not have to invest in expensive security measures or hire specialized IT personnel to maintain the system. This makes public cloud computing an attractive option for small businesses with limited budgets or IT expertise.

In contrast, private cloud computing involves hosting and managing computing resources and data in a dedicated, in-house infrastructure, which can be costly and require significant IT expertise. Hybrid cloud computing combines public and private clouds, while vertical and horizontal cloud computing are more specialized types of cloud architectures designed for specific industries or applications.

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The type of configuration management (CM) software that can connect to inventory members via SSH to perform configuration management activities is remote execution CM software.

Remote execution CM software allows administrators to remotely connect to systems using SSH (Secure Shell) protocol and execute commands or scripts on the target machines. This enables them to perform various configuration management activities, such as software installations, configuration changes, updates, and monitoring. By using SSH, which provides a secure and encrypted connection, remote execution CM software ensures that the communication between the CM server and the target systems is protected. This method allows administrators to manage configurations on multiple systems efficiently and securely from a central CM server.

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Here's an example of a Java program that meets your requirements:

java

import java.util.Scanner;

public class FriendBirthdayApp {

   public static void main(String[] args) {

       final int MAX_FRIENDS = 10;

       String[] names = new String[MAX_FRIENDS];

       String[] birthdates = new String[MAX_FRIENDS];

       int count = 0;

       Scanner scanner = new Scanner(System.in);

       // Enter friend details

       System.out.println("Enter the names and birthdates of your friends.");

       System.out.println("Enter 'zzz' for name or maximum friend limit reached to finish.");

       while (count < MAX_FRIENDS) {

           System.out.print("Enter friend's name (or 'zzz' to finish): ");

           String name = scanner.nextLine();

           if (name.equalsIgnoreCase("zzz")) {

               break;

           }

           System.out.print("Enter friend's birthdate (e.g., MM/DD/YYYY): ");

           String birthdate = scanner.nextLine();

           names[count] = name;

           birthdates[count] = birthdate;

           count++;

       }

       // Display count and names

       System.out.println("\nNumber of friends entered: " + count);

       System.out.println("Friend names:");

       for (int i = 0; i < count; i++) {

           System.out.println(names[i]);

       }

       // Search for birthdays

       while (true) {

           System.out.print("\nEnter a friend's name to display their birthday (or 'quit' to exit): ");

           String input = scanner.nextLine();

           if (input.equalsIgnoreCase("quit")) {

               break;

           }

           boolean found = false;

           for (int i = 0; i < count; i++) {

               if (names[i].equalsIgnoreCase(input)) {

                   System.out.println(names[i] + "'s birthday: " + birthdates[i]);

                   found = true;

                   break;

               }

           }

           if (!found) {

               System.out.println("Friend not found.");

           }

       }

       scanner.close();

   }

}

This program allows the user to enter the names and birthdates of up to 10 friends. It continues to prompt the user for input until they enter the sentinel value "zzz" for a name or reach the maximum friend limit. After entering the names, it displays the count and the entered names. Then, it prompts the user to enter a friend's name and displays their corresponding birthday. The user can continue searching for birthdays or type "quit" to exit the program.

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The quality of digital video depends on three main factors: screen resolution, frame rate, and bitrate.

Screen resolution refers to the number of pixels in a video frame. The higher the screen resolution, the clearer and more detailed the video will appear. Frame rate, on the other hand, refers to the number of frames per second that are displayed in the video. A higher frame rate will result in smoother and more lifelike motion.Bitrate is the amount of data that is processed per second in a video. A higher bitrate means that more data is being processed, which can lead to higher-quality video. However, a higher bitrate also means that the video file will be larger and take up more storage space.
In summary, the quality of digital video depends on screen resolution, frame rate, and bitrate. These three factors work together to determine the overall quality and appearance of the video.The quality of digital video depends on three main factors: screen resolution, frame rate, and bit rate. Screen resolution refers to the number of pixels displayed on the screen, with higher resolutions providing clearer and sharper images. Frame rate is the number of frames displayed per second, with higher frame rates ensuring smoother motion in videos. Bit rate is the amount of data used to encode each second of video, with higher bit rates offering better video quality and less compression artifacts. These factors together contribute to the overall quality of digital video.

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The quality of digital video also depends on the bitrate.

The resolution, frame rate, and bitrate are considered the three main factors that determine the quality of digital video. The screen resolution refers to the number of pixels displayed on the screen, which determines the sharpness and clarity of the image. The frame rate refers to the number of frames per second, which affects the smoothness and fluidity of the video.

The bitrate refers to the amount of data that is used to store each frame of video and is measured in bits per second. A higher bitrate results in a higher-quality video with fewer compression artifacts, while a lower bitrate results in a lower-quality video with more compression artifacts. Therefore, a balance must be struck between these three factors to achieve the desired level of video quality for a particular application.

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The correct answer is "the inversions cancel and a non-inverted signal is produced."

When the output of one gate is connected to the input of another gate, the signal may be inverted. However, if the inverted output of one gate is connected to the inverted input of another gate, the inversions cancel and a non-inverted signal is produced. This is because the first inversion cancels the second inversion, resulting in a non-inverted signal. If only one inversion occurs, the output will be inverted. Conversely, if two inversions occur, the signal will be inverted twice, resulting in a non-inverted signal.

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Odd parity means that the parity bit is set to 1 if the number of 1's in the data bits is even, and 0 if the number of 1's is odd.

a. The number of 1's in 01000110 is 3, which is odd, so the parity bit should be 1.

b. The number of 1's in 00100000 is 1, which is odd, so the parity bit should be 0.

c. The number of 1's in 00100111 is 3, which is odd, so the parity bit should be 1.

d. The number of 1's in 10000111 is 3, which is odd, so the parity bit should be 1.

Even parity means that the parity bit is set to 1 if the number of 1's in the data bits is odd, and 0 if the number of 1's is even.

a. The number of 1's in 01000110 is 3, which is odd, so the parity bit should be 0.

b. The number of 1's in 00100000 is 1, which is odd, so the parity bit should be 1.

c. The number of 1's in 00100111 is 3, which is odd, so the parity bit should be 0.

d. The number of 1's in 10000111 is 3, which is odd, so the parity bit should be 0.

To check for errors in odd parity, we count the number of 1's in each byte (including the parity bit). If the total number of 1's (including the parity bit) is even, then there is an error.

a. 1 10010001 has 5 1's, which is odd, so there is no error.

b. 1 01101100 has 5 1's, which is odd, so there is no error.

c. 0 00111010 has 3 1's, which is odd, so there is no error.

d. 0 01101011 has 4 1's, which is even, so there is an error.

It is possible that errors have occurred in other bytes, but we cannot detect them with odd parity. For example, if a byte had 6 1's (which is even), then the parity bit would be set to 0 (for odd parity), and we would not detect the error.

To check for errors in even parity, we count the number of 1's in each byte (including the parity bit). If the total number of 1's (including the parity bit) is odd, then there is an error.

a. 1 10010001 has 5 1's, which is odd, so there is an error.

b. 1 01101100 has 5 1's, which is odd, so there is an error.

c. 0 00111010 has 3 1's, which is odd, so there is no error.

d. 0 01101011 has 4 1's, which is even, so there is an error.

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