OCR AS Level Computer Science: 1.1.2 Exam 2026 Questions and Answers Graded A+

OCR AS Level Computer Science: 1.1.2
Exam 2026 Questions and Answers
Graded A+

What is an instruction set? - Correct answer-The complete set of machine code

instructions a CPU can recognise and execute.

What does CISC stand for? - Correct answer-Complex Instruction Set Computer.

What does RISC stand for? - Correct answer-Reduced Instruction Set Computer.

What are the features of CISC processors? - Correct answer-• Large instruction set

• Complex instructions

• Instructions can perform multiple operations

• Variable length instructions

• Fewer assembly language instructions needed

Why are CISC instructions called complex? - Correct answer-A single instruction

may perform several operations at once.



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, What is an example of a complex CISC instruction? - Correct answer-The MULT

instruction loads, multiplies and stores data.

What are the advantages of CISC? - Correct answer-• Fewer instructions needed

• Smaller programs

• Easier for programmers/compiler

• Less RAM needed for instructions

What are the disadvantages of CISC? - Correct answer-• More complex hardware

• Instructions may take multiple clock cycles

• Harder to pipeline

• Higher power consumption

Where are CISC processors commonly used? - Correct answer-• Desktop

computers

• Laptops

• Intel x86 processors

What are the features of RISC processors? - Correct answer-• Small/simple

instruction set

• Simple instructions
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