AQA A Level · Computer Science 7517

The stored program concept: Practice Questions

5 multiple-choice questions marked as you go, and 4 written questions with worked solutions. All on The stored program concept.

9 questions15 marksFree, no account
Question 1
1 mark

What is the primary function of the Memory Buffer Register (MBR) during the fetch stage of the Fetch-Execute cycle?

Question 2
1 mark

Which of the following sequences correctly represents the steps taken during the Fetch stage of the Fetch-Execute cycle?

Question 3
1 mark

Compare immediate addressing and direct addressing. In a machine with 8-bit operands, which statement is true?

Question 4
1 mark

Which of the following best describes the stored program concept as defined in the AQA specification?

Question 5
1 mark

An instruction is 8 bits long, consisting of a 4-bit opcode and a 4-bit operand. If the opcode \( 0010 \) represents a direct addressing 'LOAD' command and the operand is \( 1011 \), what does the processor load into the accumulator?

Question 6
2 marks

State the fundamental concept of the stored program concept as defined in computer architecture.

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Question 7
3 marks

An instruction is 8 bits long, with a 4-bit opcode and a 4-bit operand. Calculate the maximum number of distinct operations this processor can support.

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Question 8
2 marks

In the context of the stored program concept, how is the execution of machine code instructions generally described within main memory?

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Question 9
3 marks

Describe the Stored Program Concept as formulated by von Neumann. In your answer, refer to how instructions and data are handled by the system.

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