CPU Architecture - Buses, Registers

1.1 b 
Which register is being described?
Holds the memory address about to be used by the CPU

• MAR
• MDR
• Accumulator
• Program Counter

1.1 b 
Which register is being described?
Stores the results of the calculations done by the ALU

• MAR
• MDR
• Accumulator
• Program Counter

What is the purpose of the CPU?

• To process all the data and instructions.
• To turn the computer on.
• To create PowerPoint presentations.
• To provide power to the computer.

1.1 b 
Which register is being described?
Holds the memory address of the instruction for each cycle

• MAR
• MDR
• Accumulator
• Program Counter

The ALU is:

• The arithmetic and logic unit

• The arithmetic and logistics unit

• The actual logic unit

What are registers used for?

• To check that students are in school.
• To temporarily hold bits of data needed by the CPU.
• To make sure that the CPU runs properly.
• To make the CPU faster.

What is a bus?

• A circuit that connect one part of CPU to other components.
• A type of long term memory
• A type of permanent memory
• A method of transport

What happens if you increase the clock speed?

• CPU can process instructions quicker
• CPU can process more instructions at the same time
• CPU will explode
• CPU processes too fast for the cache to handle

program counter holds the address of next instruction.

instruction register holds_________

• the address of current instruction

• the instruction

• address of next instruction

• none of these

During the execution of a program which gets initialized first?

• MDR

• IR

• PC

• MAR