Which memory location holds the specific CPU machine instruction that is currently being decoded and executed by the internal instruction logic? MCQ with Answer and Explanation
Which memory location holds the specific CPU machine instruction that is currently being decoded and executed by the internal instruction logic?
A. Instruction Register (IR)
B. The Program Counter
C. The Level 3 Cache
D. Memory Address Register (MAR)
Answer: Option A
Solution (By JKSSB Mock Tests)
The Instruction Register (IR) is the dedicated high-speed storage location inside the CPU control unit that holds the binary instruction currently undergoing decoding and execution.
Explanation:
Mask ROM is factory-programmed using a photomask and cannot be changed by the user. PROM can be programmed once, EPROM can be erased with UV, and EEPROM electrically.
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