Exam-style question
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An instruction uses direct addressing and contains the operand 420. What does 420 represent?.
- A.The datum 420
- B.The address where the datum is stored
- C.The number of operands in the instruction
- D.The address of the instruction itself
Model answer
What a good answer should say
- The address where the datum is stored
Explanation
Why this works
In direct addressing, the operand is interpreted as the address of the required datum. The datum is obtained from that address in main memory or a register.
Common mistake
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