OCR A-Level Complete

Question 1 of 30

1. Question
What is the purpose of the CPU?
- To store the programs and files that user is working on.
- To store programs and files for the long-term, even when the computer is switched off.
- To process data and instructions.
- To connect all of the computer components together allowing them to communicate with one another.
- To add extra processing power to enable faster graphics.
- To convert electrical signals to either light or radio waves in order to transmit data across a network.
- To provide power to the computer.
Correct

Incorrect
Question 2 of 30

2. Question
Which stage of the CPU processing cycle is being described here: “instructions are carried out on the data”?
- Encode
- Fetch
- Extract
- Decode
- Encrypt
- Process
- Execute
Correct

Incorrect
Question 3 of 30

3. Question
How does the CPU work?
- It fetches instructions from the Hard Drive, decodes them and then executes them.
- It fetches instructions from the RAM, decodes them and then executes them.
- It fetches instructions from the Hard Drive, decodes them in the RAM and then executes them.
- It fetches instructions from the RAM, decodes them in the Hard Drive and then executes them.
Correct

Incorrect
Question 4 of 30

4. Question
When you open a program, where is its data and instructions loaded?
- The hard drive
- The CPU
- The Motherboard
- The ROM
- The RAM
Correct

Incorrect
Question 5 of 30

5. Question
What is the name of the components which connect the CPU to the RAM, allowing instructions, data and addresses to be transported?
- The Motherboard CPU/RAM Interfaces
- The Buses (data and address)
- The Data Flow Ducts
- The Transport Layer Systems
Correct

Incorrect
Question 6 of 30

6. Question
Where are data and instructions taken from during a CPU processing cycle?
- The ROM
- The Hard Drive
- The Motherboard
- The Flash Drive
- The RAM
- The GPU
Correct

Incorrect
Question 7 of 30

7. Question
Tick the examples of processing data.
- Storing
- Sorting
- Searching
- Fetching
- Calculating
- Outputting
- Decision Making
Correct

Incorrect
Question 8 of 30

8. Question
What are the three main areas of the CPU?
- The Arithmetic Logic Unit
- The Bus
- The I/O Interface
- The Immediate Access Store
- The Fetch Area
- The Control Unit
Correct

Incorrect
Question 9 of 30

9. Question
What are the three main stages of the CPU processing cycle?
- Encode
- Fetch
- Extract
- Decode
- Encrypt
- Process
- Execute
Correct

Incorrect
Question 10 of 30

10. Question
Which stage of the CPU processing cycle is being described here: “the CPU makes sense of the instructions”?
- Encode
- Fetch
- Extract
- Decode
- Encrypt
- Process
- Execute
Correct

Incorrect
Question 11 of 30

11. Question
What is special about the Von Neumann Architecture?
- Data and instructions are kept separately in memory, allowing for parallel processing.
- The programs are determined by how the computer hardware is set up.
- Data and instructions are stored together in memory.
- The RAM is positioned on the CPU chip.
Correct

Incorrect
Question 12 of 30

12. Question
In assembly language, what does the mnemonic “ADD” mean?
- Add the contents of the accumulator to a value in another register.
- Add the current value to the value stored in the accumulator.
Correct

Incorrect
Question 13 of 30

13. Question
What is an instruction set?
- A set of instructions that the CPU understands and can perform on the data it receives.
- The name given to blocks of instructions sent to the CPU from the RAM.
- A set of characters which each have a unique binary number.
- The name given to sets of instructions that the CPU sends as outputs to devices such as the monitor and speakers.
Correct

Incorrect
Question 14 of 30

14. Question
What is a ‘register’ when discussing CPU’s?
- It is a list that the CPU’s control unit uses as a checklist during each Fetch-Decode-Execute cycle.
- It is the component which transports data from the RAM to the CPU.
- It is the name given to the part of the CPU’s clock which is responsible for maintaining its speed.
- It is a memory location inside the CPU.
Correct

Incorrect
Question 15 of 30

15. Question
Which register is responsible for keeping count of the Fetch-Decode-Execute cycles?
- The Accumulator
- The Program Counter
- The Memory Address Register
- The Instruction Register
- The Memory Data Register
Correct

Incorrect
Question 16 of 30

16. Question
Which register is responsible for storing the ‘address’ of the next instruction required by the CPU?
- The Accumulator
- The Program Counter
- The Memory Address Register
- The Instruction Register
- The Memory Data Register
Correct

Incorrect
Question 17 of 30

17. Question
Which register is responsible for initially storing the next instruction/item of data required by the CPU?
- The Accumulator
- The Program Counter
- The Memory Address Register
- The Instruction Register
- The Memory Data Register
Correct

Incorrect
Question 18 of 30

18. Question
Which register is responsible for storing intermediate result from each calculation, at the end of each Fetch-Decode-Execute cycle?
- The Accumulator
- The Program Counter
- The Memory Address Register
- The Instruction Register
- The Memory Data Register
Correct

Incorrect
Question 19 of 30

19. Question
In assembly language, what does the mnemonic “LDA” mean?
- Load the current value into the accumulator.
- Load the value stored in the accumulator into a working register.
Correct

Incorrect
Question 20 of 30

20. Question
In assembly language, what does the mnemonic “STA” mean?
- Store the current value into the accumulator.
- Store the value contained in the accumulator into another memory location.
Correct

Incorrect
Question 21 of 30

21. Question
What is meant by the term ‘clock speed’ when discussing the CPU?
- The speed at which it collects data along the data bus from the RAM.
- The time a CPU takes to perform one Fetch-Decode-Execute cycle.
- The time it takes for the CPU to decode an instruction.
- The number of Fetch-Decode-Execute cycles the CPU can complete in one second.
- The speed at which the CPU can read the cache.
- The number of Fetch-Decode-Execute cycles the CPU can complete in one minute.
Correct

Incorrect
Question 22 of 30

22. Question
A CPU with a speed of 3 MHz means that it can perform how many F-D-E cycles per second?
- 3000
- 30,000
- 300,000
- 3 million
- 3 billion
- 3 trillion
Correct

Incorrect
Question 23 of 30

23. Question
What is ‘overclocking’?
- When a CPU’s clock malfunctions.
- When a CPU’s clock is set to go faster than it is designed to.
- When a CPU’s clock is positioned over the Control Unit to make the time intervals between cycles more precise.
- When the data and address buses are put under pressure to send and receive data/instructions/addresses at a faster rate.
Correct

Incorrect
Question 24 of 30

24. Question
What is a disadvantage of overclocking?
- The CPU may overheat if not cooled appropriately.
- The CPU may be unable to regulate its cycles producing poor performance.
- The data and address buses may malfunction.
- The CPU will work slower producing a drop in performance.
Correct

Incorrect
Question 25 of 30

25. Question
What is cache memory?
- Simply another name for the RAM
- Secondary storage which is used as RAM in the event of the RAM becoming full.
- A small amount of primary memory located in or next to the CPU which delivers instructions/data that the CPU is likely to use at speed.
- A small amount of memory used to hold the boot-up scripts.
Correct

Incorrect
Question 26 of 30

26. Question
What is the advantage of cache memory?
- It can supply data/instructions at high speed, keeping up with the demand of the CPU.
- It is large in capacity and has fairly good data transfer speeds.
- Being close to the CPU it can reduce the need for long data and address bus components.
- It adds extra storage capacity for new programs, documents and media files.
Correct

Incorrect
Question 27 of 30

27. Question
What is a CPU core?
- It is the control unit which controls the function of a CPU.
- It is the name given to the power supply of the CPU.
- It is a processing unit that can Fetch-Decode-Execute instructions independently.
- It is the name given to the part of the CPU which consists of registers.
Correct

Incorrect
Question 28 of 30

28. Question
Will a dual core processor always provide improved performance over a single core processor?
- Yes, because two cores can process two instructions at once so its always twice as quick.
- No, because not all software is written to make effective use of them (allow for parallel processing).
- No, because the two cores, although able to process instructions independently, cannot perform the process at the same time as each other.
- Yes, because two cores perform the F-D-E cycle faster than one core.
Correct

Incorrect
Question 29 of 30

29. Question
What is an embedded system?
- An embedded system is a computer which is modular in nature in that it can have components upgraded or added to improve its performance.
- An embedded system is a computer which has all of its components arranged together on a single circuit board. They usually run specific tasks.
Correct

Incorrect
Question 30 of 30

30. Question
From the list below, tick the characteristics that will effect the performance of a CPU.
- The weight of the CPU.
- The amount of cache that the CPU has.
- The CPU’s clock speed.
- The make of the CPU.
Correct

Incorrect

OCR A-Level Complete

CPU Structure and Function A-Level

CPU Structure and Function A-Level

Quiz Summary

Information

Results

Results

Categories

1. Question

2. Question

3. Question

4. Question

5. Question

6. Question

7. Question

8. Question

9. Question

10. Question

11. Question

12. Question

13. Question

14. Question

15. Question

16. Question

17. Question

18. Question

19. Question

20. Question

21. Question

22. Question

23. Question

24. Question

25. Question

26. Question

27. Question

28. Question

29. Question

30. Question