Question 1

Which of the following is the smallest unit of data?

Accepted Answer

Bit

Answer

Byte

Answer

Megabyte

Answer

Nibble

Question 2

How many bits are in a nibble?

Accepted Answer

4

Answer

16

Answer

2

Answer

8

Question 3

What is the binary equivalent of a nibble?

Accepted Answer

4 bits

Answer

8 bits

Answer

2 bits

Answer

16 bits

Question 4

Which of the following best describes what binary is?

Accepted Answer

A base-2 number system using 0s and 1s

Answer

A base-16 number system

Answer

A base-10 number system

Answer

A base-8 number system

Question 5

What is the equivalent of the denary number 7 in binary?

Accepted Answer

111

Answer

101

Answer

110

Answer

100

Question 6

What is the numerical base of the denary (decimal) number system?

Accepted Answer

10

Answer

8

Answer

16

Answer

2

Question 7

What does ASCII stand for?

Accepted Answer

American Standard Code for Information Interchange

Answer

Associated Standard Code for International Interchange

Answer

Advanced Standard Code for Information Integration

Answer

African Standard Code for Internet Interaction

Question 8

How does the Caesar cipher work?

Accepted Answer

It shifts each letter in the plaintext by a certain number of positions down or up the alphabet to create the ciphertext.

Answer

It replaces each letter in the plaintext with a random symbol.

Answer

It scrambles the order of the letters in the plaintext.

Answer

It adds a random number to each letter in the plaintext.

Question 9

What is the main goal of encryption?

Accepted Answer

Protecting data from unauthorized access

Answer

Sharing data without any restrictions

Answer

Deleting data permanently

Answer

Organizing data into categories

Question 10

What is a key component in the encryption process?

Accepted Answer

A secret key or password used to encrypt and decrypt data

Answer

A physical lock to secure data storage devices

Answer

A public key shared with all parties involved

Answer

A digital signature to authenticate the data sender

Question 11

What is the role of decryption in the encryption-decryption process?

Accepted Answer

Decryption reverses the encryption process to convert ciphertext back into plaintext for readability.

Answer

Decryption permanently deletes encrypted data

Answer

Decryption converts plaintext to ciphertext for security

Answer

Decryption organizes data into categories for easier access

Question 12

Which term is used to describe the number of pixels in an image per unit of length?

Accepted Answer

Resolution

Answer

Saturation

Answer

Brightness

Answer

Contrast

Question 13

What is the significance of color depth when representing an image on a computer?

Accepted Answer

Color depth determines the range of colors that can be displayed in an image

Answer

Color depth influences the file size of the image

Answer

Color depth controls the brightness of the image

Answer

Color depth specifies the physical dimensions of the image

Question 14

What is the fundamental unit of a digital image on a screen?

Accepted Answer

Pixel

Answer

Megabyte

Answer

Byte

Answer

Gigabyte

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