Exam-style question
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What is the primary role of the arithmetic logic unit (ALU)?.
- A.To carry out arithmetic and logical operations
- B.To store the address of the next instruction
- C.To decode instructions and coordinate processor activity
- D.To hold the instruction currently being executed
Model answer
What a good answer should say
- The arithmetic logic unit carries out arithmetic calculations and logical operations.
Explanation
Why this works
The ALU processes data using arithmetic operations, such as addition, and logical operations, such as comparisons. The program counter stores the address of the next instruction, the control unit coordinates processor activity, and the current instruction register holds the current instruction.
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