CS- Q1 Revision

Which of the following is an example of binary information?

• Text files

• An image file

• A video file

• All of the above

Answer explanation

Binary information refers to data represented in a format that computers can process, which includes text files, image files, and video files. Therefore, 'All of the above' is the correct choice as they all consist of binary data.

What does ASCII stand for?

• American Standard Code for Information Interchange

• American System Code for Interchange Information

• Automated System Code for Interconnected Information

• Advanced Standard Code for Internet Interchange

Answer explanation

ASCII stands for American Standard Code for Information Interchange. It is a character encoding standard used for representing text in computers and communication equipment.

What is the base number system used in binary code?

• Base 2

• Base 10

• Base 16

• Base 8

Answer explanation

The binary code is based on two symbols: 0 and 1. This is known as Base 2, which is the fundamental number system for binary representation, distinguishing it from Base 10 (decimal), Base 8 (octal), and Base 16 (hexadecimal).

How many bits are in a byte?

• 2

• 4

• 8

• 16

Answer explanation

A byte consists of 8 bits. This is a standard unit of digital information storage, making 8 the correct answer.

What is the purpose of compression in data storage?

• To make data larger

• To save space and reduce file size

• To make data more secure

• To increase the speed of data transfer

Answer explanation

The purpose of compression in data storage is to save space and reduce file size. This allows for more efficient storage and easier data transfer, making it the correct choice among the options provided.

Which term refers to the smallest unit of data in a computer system?

• Bit

• Byte

• Kilobyte

• Terabyte

Answer explanation

The term 'Bit' refers to the smallest unit of data in a computer system, representing a binary value of 0 or 1. Other options like Byte, Kilobyte, and Terabyte are larger units made up of multiple bits.

In binary, what does 101 represent in decimal?

• 3

• 5

• 7

• 9

Answer explanation

To convert binary 101 to decimal, calculate: 1*(2^2) + 0*(2^1) + 1*(2^0) = 4 + 0 + 1 = 5. Thus, 101 in binary equals 5 in decimal.

What is the main benefit of using decimal over binary?

• It uses fewer digits

• It is faster to process

• It provides more accuracy

• It is more secure

Answer explanation

The main benefit of using decimal over binary is that it uses fewer digits to represent the same value. This can simplify calculations and make numbers easier to read and understand.

What is the process of converting information into binary called?

• Compression

• Encryption

• Encoding

• Decoding

Answer explanation

The process of converting information into binary is called encoding. It transforms data into a format suitable for storage or transmission, making it essential for digital communication.

How many different values can a single byte represent?

• 16

• 64

• 256

• 512

Answer explanation

A single byte consists of 8 bits. Each bit can be either 0 or 1, leading to 2^8 = 256 possible combinations. Therefore, a single byte can represent 256 different values, making '256' the correct answer.