WorksheetsCPU Architecture – OCR J277 (SLR 1.1)
Total questions: 20
Worksheet time: 10mins
What does CPU stand for?
Central Programming Unit
Central Processing Unit
Computer Processing Unit
Core Processor Unit
Which component of the CPU is responsible for carrying out calculations and logical decisions?
Register
Control Unit
ALU
Cache
What is the function of the Control Unit (CU)?
Stores frequently used data
Executes mathematical instructions
Coordinates the actions of the CPU
Holds addresses for data
Which of these best describes the role of registers in the CPU?
Store long-term data
Temporarily hold small amounts of data for processing
Perform complex calculations
Control the operating system
What is the function of the Program Counter (PC)?
Stores the result of a calculation
Tracks the number of instructions processed
Stores the next instruction’s address
Holds the current instruction
What does the MAR (Memory Address Register) do?
Holds data to be written to memory
Holds the address of where data is fetched from or written to
Adds numbers
Stores the last instruction
What does the MDR (Memory Data Register) hold?
The current instruction
The result of the fetch-decode-execute cycle
The actual data being transferred
The address of the next instruction
What is the purpose of the accumulator?
Holds the result of calculations
Stores long-term data
Contains the program instructions
Holds the CPU clock speed
What are the three stages of the Fetch-Decode-Execute cycle?
Fetch, Load, Run
Load, Execute, Store
Fetch, Decode, Execute
Decode, Store, Transfer
Where is the instruction fetched from in the fetch phase?
Cache
ALU
RAM
ROM
What type of memory is used to store frequently used instructions and data for quick access?
RAM
ROM
Cache
Hard Drive
What effect does increasing clock speed have on CPU performance?
Decreases power usage
Increases data storage
Allows more instructions per second
Lowers temperature
What is meant by "core" in a CPU?
A backup processor
A single processing unit within the CPU
A type of RAM
The amount of cache
How does adding more cores affect CPU performance?
Always doubles the speed
Allows more instructions to be processed at the same time
Reduces the number of fetch cycles
Increases clock speed
What does Von Neumann architecture describe?
A type of memory
A type of storage
A design where data and instructions share memory
A backup system
What is a key characteristic of Von Neumann architecture?
Separate memory for data and instructions
Parallel processing
One memory for data and instructions
Uses hard drives for data
What component is NOT part of the Von Neumann model?
Arithmetic Logic Unit
Program Counter
Graphics Card
Memory
Which component decodes the fetched instruction?
ALU
CU
PC
MDR
What does clock speed measure?
Number of instructions the CPU can execute per second
Amount of RAM used
Temperature of the CPU
Size of cache
Which component increases performance by holding frequently used data close to the CPU?
RAM
MDR
Cache
MAR
