IGCSE Computer Science

What does CPU stand for?

• Central Processing Unit
• Computer Protocol User
• Cool Pokemon Unit
• Computer Processing Unit

Which of these is not a step in the FDE cycle?

• Instructions are fetched from main memory
• Instructions are decoded in the control unit
• The decoded instruction is executed
• The ALU decodes the instructions

What is the purpose of the memory address register?

• It memorises everything

• It hold address of next memory location

• It holds address of data item to be retrieved from memory

• it holds the data to be decoded in the next cycle

What is the purpose of the Memory Data Register (MDR)?

• Holds data read from memory to be decoded

• Hold the location of memory to use in fetch cycle

• Holds next memory address to be processed

• It does nothing

What does ALU stand for?

• Arguable Logic Unit
• Arithmetic Larger Unit
• Arithmetic Logic Unit 
• Arithmetic Logic Utility

According to the von Neumann model, _______ are stored in memory.

• only data

• only programs

• data & programs

• neither data nor programs

Which of these are REGISTERS in the CPU? (Tick ALL that are correct)

• Accumulator

• ALU

• Program Counter

• Memory Address Register

• Control Bus Register

What does MAR stand for?

• Main Address Register
• Memory Address Register
• Massive Address Register
• Minimal Age Readable

The small high speed storage areas within the memory and processor are known as..?

• Registers
• Addresses
• Cache
• Buses

Which of the following is not a register?

• CU
• MAR
• MDR
• PC