Computer System Quiz

What is the main function of the Arithmetic Logic Unit (ALU) in a CPU?

• Manage signals sent around the computer

• Control how instructions are executed

• Transfer data between CPU and RAM

• Perform arithmetic calculations on data

Which part of the CPU holds the address of the next instruction to be fetched and executed?

• Memory Data Register (MDR)

• Program Counter (PC)

• Memory Address Register (MAR)

• Current Instruction Register (CIR)

What is the function of the Control Unit (CU) in a CPU?

• Carry out calculations and logical decisions

• Send out signals to coordinate how the processor works

• Hold the data being worked on and the results of operands

• Carry the addresses of memory locations used to store data and instructions

Which bus is responsible for transferring the binary data between the stated memory locations?

• Control bus

• Data bus

• Interrupt Register

• Address bus

What is the main function of the Immediate Access Store (IAS) in a CPU?

• Hold the instructions and data that is ready to be used by the CPU

• Hold the RAM address you want to read to or write from

• Carry out the calculations and logical decisions

• Carries the addresses of memory locations used to store data and instructions

What is the function of the Memory Address Register (MAR) in a CPU?

• Holds the address of the next instruction to be fetched and executed

• Holds the current instruction being executed

• Holds the data you have read from RAM or want to write to RAM

• Holds the RAM address you want to read to or write from

What is the function of the Registers in a CPU?

• Hold the RAM address you want to read to or write from

• Holds the current instruction being executed

• Holds the data being worked on and the results of operands

• Memory locations within the processor itself, storing data and instructions

What is the function of the Data Bus in a CPU?

• Holds the address of the next instruction to be fetched and executed

• Signals need to be sent around the computer to control when things happen

• Transfers the binary data between the stated memory locations

• Carries the addresses of memory locations used to store data and instructions

What is the function of the Accumulator in a CPU?

• Holds information about the last operation

• Holds the data being worked on and the results of operands

• Holds the current instruction being executed

• Holds the address of the next instruction to be fetched and executed

What is the function of the Control Bus in a CPU?

• Signals need to be sent around the computer to control when things happen

• Transfers the binary data between the stated memory locations

• Carries the addresses of memory locations used to store data and instructions

• Holds the address of the next instruction to be fetched and executed