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As CS Data representation and data types​ (Unit 1)

Authored by Andrew Dawson

Computers

10th Grade

Used 1+ times

As CS Data representation and data types​ (Unit 1)
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17 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which term represents a group of 8 bits?

Byte

Kilobyte

Megabyte

Terabyte

Answer explanation

A group of 8 bits is represented by the term "byte." It is the fundamental unit of storage in computer systems and is commonly used to represent characters, numbers, and other data.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a bit represent in the binary number system?

On or Off signal

Decimal digit

Alphanumeric character

Color value

Answer explanation

In the binary number system, a bit represents an electronic signal that can be either "on" or "off." These two states are commonly represented as 1 or 0, respectively, and form the foundation of digital data representation and processing.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What determines the size of a word in a CPU?

The number of kilobytes

The number of megabytes

The number of bits it can manipulate at one time

The number of bytes in a kilobyte

Answer explanation

The size of a word in a CPU is determined by the number of bits it can manipulate at one time. The word size determines the maximum amount of data that the CPU can process in a single operation, and it can vary depending on the architecture and design of the CPU. A larger word size generally allows for more efficient and faster processing of data.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the decimal equivalent of the binary number 1010?

2

5

10

15

Answer explanation

The binary number 1010 represents the decimal value 10. In binary, each digit represents a power of 2, so the calculation is as follows: 1 2^3 + 0 2^2 + 1 2^1 + 0 2^0 = 8 + 0 + 2 + 0 = 10.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the hexadecimal representation of the decimal number 27?

1B

21

2C

31

Answer explanation

The decimal number 27 can be represented as 1B in hexadecimal. In hexadecimal, the digits range from 0 to F, where A represents 10, B represents 11, and so on. To convert 27 to hexadecimal, divide it by 16: 27 / 16 = 1 remainder 11. The remainder 11 corresponds to the letter B, giving us the hexadecimal representation 1B.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the binary representation of the hexadecimal number 3D?

1101

0011

1010

1111

Answer explanation

The hexadecimal number 3D can be represented as 1101 in binary. Each hexadecimal digit corresponds to a group of 4 binary digits (bits). In this case, 3 is equivalent to 0011, and D is equivalent to 1101. Combining the two, we get the binary representation 1101.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which character encoding standard uses a 7-bit binary encoding scheme?

ASCII

Unicode

UTF-8

UTF-16

Answer explanation

ASCII (American Standard Code for Information Interchange) is the character encoding standard that uses a 7-bit binary encoding scheme. It assigns a unique 7-bit binary code to represent each character, supporting basic Latin characters, numbers, punctuation marks, and control characters.

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