AS Computer Science Units 3&4 Quiz

Which component of the CPU is responsible for performing arithmetic and logical operations?

• Control Unit

• Arithmetic Logic Unit (ALU)

• Cache Memory

• Memory Address Register

What is the output of a NAND gate when both inputs are 1?

• 0

• Undefined

• 2

• 1

In the fetch-execute cycle, what happens during the decode stage?

• Data is retrieved from memory

• Results are stored in registers

• The instruction's operation is interpreted

• The PC is incremented

Which type of memory is volatile and needs constant power to maintain data?

• ROM

• Hard Drive

• RAM

• EPROM

What is the purpose of the Program Counter (PC) in CPU architecture?

• Count the number of programs running

• Store intermediate calculation results

• Hold the address of the next instruction

• Track program execution time

In assembly language, what does the LDR instruction typically do?

• Store data to memory

• Load data from memory

• Compare two values

• Jump to a new address

Which logic gate produces an output of 1 only when exactly one input is 1?

• XOR

• NOR

• AND

• NAND

What is the main function of the CPU's control unit?

• Perform calculations

• Coordinate CPU operations

• Store temporary data

• Process graphics

Which type of bus carries control signals between CPU components?

• Data bus

• Address bus

• Control bus

• System bus

Which register holds the result of ALU operations?

• Status register

• Memory buffer register

• Accumulator

• Instruction register