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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
Given below are two statements:
Statement I: Hardwired control unit can be optimized to produce fast mode of operation.
Statement II: Indirect addressing mode needs two memory reference to fetch the operand.
In the light of the above statements, choose the correct answer from the options given below:
Statement I: Hardwired control unit can be optimized to produce fast mode of operation.
Statement II: Indirect addressing mode needs two memory reference to fetch the operand.
In the light of the above statements, choose the correct answer from the options given below:
Solution
Statement I is true.Hardwired control unit uses fixed logic circuits.
So, it is faster than microprogrammed control unit and can be optimized for fast operation.
Statement II is also true.
In indirect addressing mode, the address field of the instruction contains the address of the memory location where the effective address is stored.
So, first memory reference is used to get the effective address.
Second memory reference is used to fetch the actual operand.
Therefore, indirect addressing needs two memory references to fetch the operand.
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