Q14.Marks: +2.0UGC NET Paper 2: Computer Science 26th Nov 2021
Given below are two statements
Statement I : CISC computers have a large of number of addressing modes.
Statement II : In RISC machines memory access is limited to load and store instructions.
In light of the above statements, choose the correct answer from the options given below
1.Both Statement I and Statement II are true✓ Correct
2.Both Statement I and Statement II are false
3.Statement I is true but Statement II is false
4.Statement I is false but Statement II is true
Solution
CISC computers have a large of number of addressing modes:
CISC processor have instructions that occupy more than one memory word.
A single instruction has several low-level instructions. Each instruction requires more than one clock cycle.
CISC instructions have complex and large number of addressing modes and complex instructions This makes decoding of instruction complex.
Statement I is TRUE.
In RISC machines, memory access is limited to load and store instructions:
The small set of instructions of a typical RISC processor consists mostly of register-to-register operations, with only simple load and store operations.
Hence, in RISC machines, memory access is limited to such instructions only (load and store).