COMPUTER SCIENCE AND ENGINEERING
COMPUTER ORGANIZATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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MDR
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IR
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PC
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MAR
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Detailed explanation-1: -4. During the execution of a program which gets initialized first? Explanation: For the execution of a process first the instruction is placed in the PC.
Detailed explanation-2: -Explanation: The multiplexer circuit is used to choose between the two as it can give different results based on the input.
Detailed explanation-3: -Accumulator. It is an 8-bit register used to perform arithmetic, logical, I/O & LOAD/STORE operations. It is connected to internal data bus & ALU.
Detailed explanation-4: -The instruction-> Add LOCA, R0 does a)Adds the value of LOCA to R0 and stores in the temp registerb)Adds the value of R0 to the address of LOCAc)Adds the values of both LOCA and R0 and stores it in R0d)Adds the value of LOCA with a value in accumulator and stores it in R0Correct answer is option ‘C’.
Detailed explanation-5: -The instruction after obtained from the PC, is decoded and operands are fetched and stored in the IR.