NPTEL Advanced Computer Architecture Week 3 Assignment Answers 2025
1. In the case of ____________instructions it is _____________to fetch multiple instructions at once since the boundaries between instructions are _______________.
- CISC, easy, known
- RISC, easy, not known
- CISC, hard, not known
- RISC, hard, known
Answer :- For Answers Click Here
2. Select the most appropriate option. Answer in the context of load instructions that use the stack pointer as the argument.
S1: We cannot compute the address of the load instruction at decode time.
S2: We cannot issue a load to the memory system based on the stack pointer’s value early.
- S1 is true, S2 is false
- S1 is false, S2 is true
- Both S1 and S2 are true
- Both S1 and S2 are false
Answer :-
3. In an out-of-order processor, we “appear to” update the architectural registers in program order to _______________.
- provide a speedup.
- ensure precise exceptions.
- handle WAR and WAW dependencies.
- All the options.
Answer :-
4. Consider a system with 16 architectural registers and 128 physical registers. At any point of time, there will at least be _____________ physical registers that are unmapped.
- 16
- 128
- 112
- 144
Answer :-
5. Select the most appropriate option for the rename stage of an out-of-order processor.
S1: The dependency check logic translates an architectural register ID to a physical register ID to remove WAR and WAW dependencies.
S2: The register alias table keeps track of the available and free physical register IDs.
- S1 is true, S2 is false
- S1 is false, S2 is true
- Both S1 and S2 are true
- Both S1 and S2 are false
Answer :-
6. What does the ready bit of an entry in the instruction window signify?
- The corresponding value is present in the physical register file.
- The corresponding value is present in the architectural register file.
- The corresponding value can be stored in the physical register file.
- The corresponding value can be stored in the architectural register file.
Answer :- For Answers Click Here
7. The process of sending instructions from the instruction window to the execution units is called
- Instruction dispatch
- Instruction execution
- Instruction scheduling
- Instruction issue
Answer :-
8. A producer instruction broadcasts its value after it
- executes
- gets selected
- writes back
- is dispatched
Answer :-
9. Why do we prefer a large number of physical registers?
S1: To increase Instruction Level Parallelism (ILP)
S2: To have a large number of instructions in flight
- Only S1
- Only S2
- Both S1 and S2
- Neither S1 nor S2
Answer :-
10. In general, which of the following select policies is the most performance-efficient?
- Load instructions have higher priority than stores.
- Store instructions have higher priority than loads.
- Load and store instructions have the same priority.
- The priority of load and store instructions depends on the nature of an application.
Answer :- For Answers Click Here
