Understanding Computer Science Concepts

Which SQL keyword is used to retrieve data from a database table?

• UPDATE

• SELECT

• DELETE

• INSERT

What is the most suitable data type in SQL to store a person's age?

• VARCHAR

• INTEGER

• DATE

• BOOLEAN

What is the binary representation of the decimal number 13?

• 1101

• 1011

• 1110

• 1001

Convert the binary number 101101 to hexadecimal.

• 2D

• 1B

• 2B

• 1D

• 10001

• 10001

• 1000

• 10010

Which logic gate outputs TRUE only if both inputs are TRUE?

• OR

• AND

• NOT

• NAND

• 0

• 1

• 2

• Cannot be determined

Which of the following is NOT a method of representing images in a computer?

• Bitmap

• Vector

• Analogue

• Raster

What does each pixel in a bitmap image store?

• The file size

• The colour information

• The image resolution

• The sound data

Which character encoding is most commonly used to represent text in computers?

• ASCII

• JPEG

• MP3

• HTML