
CPU Functions
Quiz
•
Computers
•
12th Grade
•
Practice Problem
•
Hard
Laura Markwell
FREE Resource
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27 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which register holds the address of the next instruction to be fetched?
Program Counter
Accumulator
Memory Data Register
Control Unit
Answer explanation
The Program Counter (PC) holds the address of the next instruction to be fetched in a CPU. It increments after each instruction is fetched, ensuring the CPU executes instructions in the correct sequence.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the role of the Memory Address Register (MAR)?
Holds the address of the next instruction
Stores intermediate arithmetic results
Holds the address of memory being accessed
Controls the execution of instructions
Answer explanation
The Memory Address Register (MAR) holds the address of the memory being accessed. It is crucial for fetching instructions and data from memory, making it essential for the CPU's operation.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which bus carries memory addresses?
Data Bus
Control Bus
Address Bus
Instruction Bus
Answer explanation
The Address Bus is responsible for carrying memory addresses from the CPU to other components, allowing the system to access specific locations in memory. Therefore, the correct answer is the Address Bus.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What does the Control Unit do?
Stores intermediate values
Manages CPU execution
Carries addresses to memory
Performs arithmetic operations
Answer explanation
The Control Unit manages CPU execution by directing the operation of the processor, coordinating the flow of data between the CPU and other components, and ensuring instructions are executed in the correct order.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which register temporarily stores fetched data or instructions?
MDR
ALU
PC
MAR
Answer explanation
The MDR (Memory Data Register) temporarily stores fetched data or instructions from memory before they are processed. It acts as a buffer between the CPU and memory, making it essential for data handling.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the function of the Accumulator (ACC)?
Stores results of calculations
Holds program instructions
Manages clock speed
Carries signals to RAM
Answer explanation
The Accumulator (ACC) is a register in a computer's CPU that stores the results of calculations performed by the arithmetic logic unit (ALU). This makes 'Stores results of calculations' the correct answer.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What happens during the Decode phase of the FDE cycle?
Instruction is retrieved
Instruction is interpreted
Instruction is executed
Instruction is outputted
Answer explanation
During the Decode phase, the instruction is interpreted, meaning the CPU determines what action the instruction specifies. This is crucial for the subsequent execution phase.
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