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ALU Operation Examples

Part of Arithmetic Logic Unit (ALU) — GCSE Computer Science

This diagram covers ALU Operation Examples within Arithmetic Logic Unit (ALU) for GCSE Computer Science. Revise Arithmetic Logic Unit (ALU) in Systems Architecture for GCSE Computer Science with 15 exam-style questions and 12 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 4 of 6 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Topic position

Section 4 of 6

Practice

15 questions

Recall

12 flashcards

ALU Operation Examples

ALU in Action Arithmetic Input 1: 8 (from ACC) Input 2: 5 (operand) Operation: ADD ALU Output: 13 Result → ACC 8 + 5 = 13 Logic Input 1: TRUE Input 2: FALSE Operation: AND ALU Output: FALSE Result → ACC Both must be TRUE Comparison Input 1: 7 Input 2: 5 Operation: > ALU Output: TRUE Result → ACC 7 is greater than 5 Real-World Programming Examples Arithmetic in code: total = price + tax ALU adds the two values, stores result in total Logic in code: if (isLoggedIn AND hasAccess) ALU performs AND operation on both conditions Comparison in code: while (count < 10) ALU compares count to 10, returns TRUE/FALSE Combined: if ((age >= 18) AND (hasTicket)) ALU: comparison THEN logic operation

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Read this section alongside the surrounding pages in Arithmetic Logic Unit (ALU). That gives you the full topic sequence instead of a single isolated revision point.

The Three Types of ALU OperationsHow the ALU Works with Other ComponentsThe Super CalculatorDeep Dive: Why Logic Operations Matter

Practice Questions for Arithmetic Logic Unit (ALU)

What does ALU stand for?

  • A. Arithmetic Logic Unit
  • B. Automatic Load Utility
  • C. Address Logic Unit
  • D. Arithmetic Load Unit
1 markfoundation

Explain how the role of the ALU differs from the role of the Control Unit (CU).

2 marksstandard

Quick Recall Flashcards

Where are ALU results stored?
Accumulator (ACC)
What does ALU stand for?
Arithmetic Logic Unit

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The Three Types of ALU Operations

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How the ALU Works with Other Components