Mock prep part 2

Why is RAM considered volatile memory?

• It stores data permanently
• It loses data when power is off
• It stores startup files
• It executes instructions directly

In which storage medium is a laser used to read data?

• SSD
• HDD
• Optical Disc
• ROM chip

What is the purpose of the data bus in a computer system?

• Manage power supply
• Control the timing of operations
• Carry memory addresses
• Transfer data between components

Which component of the CPU is responsible for fetching instructions from memory?

• Cache
• ALU
• Control Unit
• Register

What is the result of a logical shift right by 1 on 11010010?

• 1101001
• 1101010
• 11101001
• 11010001

Which of the following is true for two's complement binary?

• It has 9-bit length
• The leftmost bit indicates sign
• It can only represent positive numbers
• It cannot store zero

Which character set is used in modern systems to support multiple languages?

• ASCII
• Morse
• Unicode
• Binary-coded decimal

What does a colour depth of 24-bit allow?

• 256 colours
• 16 colours
• 16.7 million colours
• 1.2 billion colours

A bitmap image measures 100x200 pixels with 8 bits per pixel. What is its size in bytes?

• 2,000
• 20,000
• 200,000
• 25,600

If a bitmap image is 200x300 pixels with a color depth of 16 bits, what is its size in bytes?

• 120,000
• 80,000
• 100,000
• 96,000