Understanding Information Representation

Front

What is the binary equivalent of the decimal number 10?

Back

1010

Answer explanation

The binary equivalent of the decimal number 10 is calculated by converting it to base 2. The correct binary representation is 1010, which corresponds to 8 (2^3) + 2 (2^1) = 10.

Front

How many bits are in a byte?

Back

8

Answer explanation

A byte consists of 8 bits. This is a standard measurement in computing, where data is often processed in bytes, making 8 the correct answer.

Front

What is the purpose of error detection methods in data transmission?

Back

To identify and correct errors in transmitted data.

Answer explanation

Error detection methods are crucial in data transmission as they identify and correct errors in transmitted data, ensuring accuracy and reliability. This is essential for maintaining data integrity during communication.

Front

Name one common error detection method used in data transmission.

Back

Cyclic Redundancy Check (CRC)

Answer explanation

Cyclic Redundancy Check (CRC) is a widely used error detection method in data transmission. It calculates a checksum based on the data and checks for errors by comparing it with the transmitted checksum, making it effective for detecting changes.

Front

Explain the difference between lossy and lossless compression.

Back

Lossy compression sacrifices some quality for smaller file sizes, while lossless compression retains all original data.

Answer explanation

Lossy compression reduces file size by sacrificing some quality, making it suitable for media like audio and video. In contrast, lossless compression retains all original data, ensuring no quality loss, ideal for text and images.

Front

If both Boris and Bob agree to go on a trip, what is the final decision?

Back

true

Answer explanation

An AND gate outputs true only when both inputs are true. Since both inputs are true in this case, the output is true.

Front

James is working on a computer science project and needs to convert the decimal number 255 to its hexadecimal representation. What is the correct hexadecimal value?

Back

FF

Answer explanation

The decimal number 255 converts to hexadecimal as follows: 255 divided by 16 gives 15 with a remainder of 15. In hexadecimal, 15 is represented as 'F'. Therefore, 255 in decimal is 'FF' in hexadecimal.

Front

Boris and Felix are working on a computer science project where they need to convert binary numbers to hexadecimal. How should they proceed?

Back

Group binary digits into sets of four and convert each group to hexadecimal.

Answer explanation

To convert a binary number to hexadecimal, group the binary digits into sets of four, starting from the right. Each group is then converted to its hexadecimal equivalent, making this the correct method.

Front

Bobby and George are organizing a party. They decide that the party will happen if at least one of them is available to host. What is the function of this decision-making process similar to in digital logic?

Back

The function of an OR gate is to output true if at least one input is true.

Answer explanation

The correct choice states that an OR gate outputs true if at least one input is true. This is fundamental to its function, distinguishing it from AND gates, which require all inputs to be true for a true output.

Front

Felix is working on a computer science project and needs to convert the hexadecimal number A3 into its binary representation. What is the correct binary representation?

Back

10100011

Answer explanation

The hexadecimal number A3 converts to binary by converting each hex digit: A = 1010 and 3 = 0011. Combining these gives 10100011, which is the correct binary representation.