WGU C952 OA EXAM / WGU C952 COMPUTER
ARCHITECTURE SET 1–5
OBJECTIVE ASSESSMENT PRACTICE EXAM
2026/2027 COMPLETE ACCURATE TEST EXAM
ACTUAL QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES
(VERIFIED SOLUTIONS) 2026 EDITION BEST
DOCUMENT FOR EXAM PREPARATIONS
Questions 1–20: Performance & Fundamentals
1. What is the formula for CPU execution time?
A. clock rate × CPI × instruction count
B. instruction count ÷ (CPI × clock rate)
C. CPI × clock rate ÷ instruction count
D. instruction count × CPI × clock cycle time
CORRECT ANSWER: D. instruction count × CPI × clock cycle time
Rationale: CPU execution time = instruction count × cycles per
instruction (CPI) × clock cycle time.
,2. If a processor has a clock rate of 3 GHz, what is its clock cycle time?
A. 3 ns
B. 0.33 ns
C. 1 ns
D. 3 ps
CORRECT ANSWER: B. 0.33 ns
Rationale: Clock cycle time = 1 ÷ (3 × 10⁹) = 0.33 nanoseconds.
3. MIPS measures:
A. Memory operations per second
B. Millions of instructions per second
C. Machine instruction processing speed
D. Micro-operations per second
CORRECT ANSWER: B. Millions of instructions per second
Rationale: MIPS = Millions of Instructions Per Second.
4. Which factor does NOT directly affect CPU performance?
A. CPI
,B. clock rate
C. instruction count
D. hard drive capacity
CORRECT ANSWER: D. hard drive capacity
Rationale: Storage capacity does not directly influence CPU execution
time.
5. Amdahl's Law is used to calculate:
A. cache latency
B. pipeline hazards
C. maximum speed up from enhancement
D. memory bandwidth
CORRECT ANSWER: C. maximum speed up from enhancement
Rationale: Amdahl's Law determines theoretical speedup based on the
fraction of execution time that is improved.
6. If 40% of execution time is improved by 2×, overall speedup is
approximately:
A. 1.25
B. 1.33
C. 1.5
, D. 2.0
CORRECT ANSWER: A. 1.25
Rationale:
Speedup = 1 / [(1 − 0.4) + (0.)]
= 1 / (0.6 + 0.2)
= .8
= 1.25
7. CPI stands for:
A. cycles per instruction
B. clock pulse interval
C. central processing interface
D. compute performance index
CORRECT ANSWER: A. cycles per instruction
Rationale: CPI measures the average number of clock cycles required to
execute one instruction.
8. Throughput refers to:
A. latency per instruction
B. time to complete one task
ARCHITECTURE SET 1–5
OBJECTIVE ASSESSMENT PRACTICE EXAM
2026/2027 COMPLETE ACCURATE TEST EXAM
ACTUAL QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES
(VERIFIED SOLUTIONS) 2026 EDITION BEST
DOCUMENT FOR EXAM PREPARATIONS
Questions 1–20: Performance & Fundamentals
1. What is the formula for CPU execution time?
A. clock rate × CPI × instruction count
B. instruction count ÷ (CPI × clock rate)
C. CPI × clock rate ÷ instruction count
D. instruction count × CPI × clock cycle time
CORRECT ANSWER: D. instruction count × CPI × clock cycle time
Rationale: CPU execution time = instruction count × cycles per
instruction (CPI) × clock cycle time.
,2. If a processor has a clock rate of 3 GHz, what is its clock cycle time?
A. 3 ns
B. 0.33 ns
C. 1 ns
D. 3 ps
CORRECT ANSWER: B. 0.33 ns
Rationale: Clock cycle time = 1 ÷ (3 × 10⁹) = 0.33 nanoseconds.
3. MIPS measures:
A. Memory operations per second
B. Millions of instructions per second
C. Machine instruction processing speed
D. Micro-operations per second
CORRECT ANSWER: B. Millions of instructions per second
Rationale: MIPS = Millions of Instructions Per Second.
4. Which factor does NOT directly affect CPU performance?
A. CPI
,B. clock rate
C. instruction count
D. hard drive capacity
CORRECT ANSWER: D. hard drive capacity
Rationale: Storage capacity does not directly influence CPU execution
time.
5. Amdahl's Law is used to calculate:
A. cache latency
B. pipeline hazards
C. maximum speed up from enhancement
D. memory bandwidth
CORRECT ANSWER: C. maximum speed up from enhancement
Rationale: Amdahl's Law determines theoretical speedup based on the
fraction of execution time that is improved.
6. If 40% of execution time is improved by 2×, overall speedup is
approximately:
A. 1.25
B. 1.33
C. 1.5
, D. 2.0
CORRECT ANSWER: A. 1.25
Rationale:
Speedup = 1 / [(1 − 0.4) + (0.)]
= 1 / (0.6 + 0.2)
= .8
= 1.25
7. CPI stands for:
A. cycles per instruction
B. clock pulse interval
C. central processing interface
D. compute performance index
CORRECT ANSWER: A. cycles per instruction
Rationale: CPI measures the average number of clock cycles required to
execute one instruction.
8. Throughput refers to:
A. latency per instruction
B. time to complete one task
