ACTUAL WGU C952 Computer Architecture Objective
Assessment Practice Exam (2026) | 120 Questions
with Answers & Detailed Rationales | INSTANT PDF
DOWNLOAD
Introduction
Prepare confidently for your WGU C952 Computer Architecture Objective Assessment (OA)
with this comprehensive 120-question practice exam, designed to mirror the structure and
difficulty of the actual assessment. This exam covers essential computer architecture concepts
including CPU organization, memory hierarchy, cache systems, pipelining, instruction
execution, parallel processing, and performance calculations.
Each question is carefully crafted with at least 15 words, ensuring deeper conceptual
understanding and alignment with real OA expectations. You will find multiple-choice
questions with bolded correct answers and detailed rationales, helping reinforce critical
thinking and problem-solving skills required to succeed.
This practice exam is ideal for students looking to:
Strengthen understanding of core computer architecture principles
Master binary, hexadecimal, and performance calculations
Improve accuracy in cache, pipeline, and CPU performance questions
Build confidence for the WGU C952 OA exam format
Use this resource as a self-assessment tool by attempting all questions before reviewing
answers. Focus on understanding the rationales to enhance your ability to apply concepts in real
exam scenarios.
1. In a modern computer system, how does the CPU coordinate instruction execution
using the control unit and system clock signals?
A. By storing all data in registers permanently
B. By generating timing signals and directing data flow between components
C. By replacing memory operations with I/O operations
D. By bypassing the ALU during execution
,Rationale: The control unit synchronizes operations using clock signals and directs how
data moves between CPU components.
2. When comparing RISC and CISC architectures, which statement best explains how
instruction complexity impacts execution efficiency and pipeline design?
A. RISC uses complex instructions requiring multiple cycles
B. CISC uses fewer registers than RISC
C. RISC uses simple instructions that improve pipeline efficiency and execution
speed
D. CISC eliminates the need for memory access
Rationale: RISC simplifies instructions, making pipelining more efficient and predictable.
3. How does cache memory improve overall system performance when compared to
accessing main memory directly for frequently used data?
A. By increasing disk storage capacity
B. By replacing RAM entirely
C. By storing frequently accessed data closer to the CPU for faster retrieval
D. By reducing instruction set size
Rationale: Cache reduces latency by keeping frequently used data near the CPU.
4. In a pipelined processor architecture, what is the primary impact of a data hazard
on instruction execution flow and performance?
A. It increases clock speed automatically
B. It causes delays or stalls due to dependencies between instructions
C. It eliminates memory access time
D. It simplifies ALU operations
Rationale: Data hazards occur when instructions depend on previous results, causing
pipeline stalls.
,5. What role does the Arithmetic Logic Unit (ALU) play in executing instructions that
involve both arithmetic calculations and logical comparisons?
A. It stores long-term data permanently
B. It performs mathematical operations and logical decision-making processes
C. It manages I/O device communication
D. It controls memory addressing exclusively
Rationale: The ALU executes arithmetic (add, subtract) and logical (AND, OR) operations.
6. How does virtual memory allow programs to execute efficiently even when the
system’s physical RAM is limited or partially utilized?
A. By increasing CPU clock speed
B. By disabling cache memory
C. By using disk storage to simulate additional memory through paging mechanisms
D. By eliminating secondary storage
Rationale: Virtual memory extends usable memory using disk space.
7. What is the primary difference between SRAM and DRAM in terms of structure,
speed, and typical usage within computer systems?
A. DRAM is faster and used in cache
B. SRAM uses capacitors and needs refreshing
C. SRAM is faster and used for cache, while DRAM is slower and used for main
memory
D. DRAM is more expensive than SRAM
Rationale: SRAM is faster but costly; DRAM is slower but cheaper for main memory.
8. How does instruction pipelining increase CPU throughput while still maintaining a
fixed clock cycle time for each stage of execution?
A. By reducing instruction count
B. By overlapping multiple instruction stages to execute simultaneously
C. By eliminating control units
, D. By storing instructions in registers permanently
Rationale: Pipelining overlaps execution phases to improve throughput.
9. What is the purpose of the program counter (PC) in managing the sequence of
instructions executed by the CPU during program execution?
A. Stores arithmetic results
B. Holds the address of the next instruction to be executed
C. Controls memory allocation
D. Stores user data
Rationale: PC tracks the next instruction address.
10. In memory hierarchy design, why are smaller, faster memory units placed closer
to the CPU while larger, slower ones are farther away?
A. To reduce cost only
B. To increase power consumption
C. To balance speed, cost, and capacity for optimal performance
D. To eliminate RAM
Rationale: Memory hierarchy optimizes speed vs. cost.
11. What happens during a cache miss, and how does it affect overall system
performance and instruction execution timing?
A. CPU stops permanently
B. Data must be fetched from slower main memory, increasing latency
C. Cache expands automatically
D. Instruction is deleted
Rationale: Cache miss increases access time.
12. How does a bus system facilitate communication between the CPU, memory, and
input/output devices in a computer architecture?
Assessment Practice Exam (2026) | 120 Questions
with Answers & Detailed Rationales | INSTANT PDF
DOWNLOAD
Introduction
Prepare confidently for your WGU C952 Computer Architecture Objective Assessment (OA)
with this comprehensive 120-question practice exam, designed to mirror the structure and
difficulty of the actual assessment. This exam covers essential computer architecture concepts
including CPU organization, memory hierarchy, cache systems, pipelining, instruction
execution, parallel processing, and performance calculations.
Each question is carefully crafted with at least 15 words, ensuring deeper conceptual
understanding and alignment with real OA expectations. You will find multiple-choice
questions with bolded correct answers and detailed rationales, helping reinforce critical
thinking and problem-solving skills required to succeed.
This practice exam is ideal for students looking to:
Strengthen understanding of core computer architecture principles
Master binary, hexadecimal, and performance calculations
Improve accuracy in cache, pipeline, and CPU performance questions
Build confidence for the WGU C952 OA exam format
Use this resource as a self-assessment tool by attempting all questions before reviewing
answers. Focus on understanding the rationales to enhance your ability to apply concepts in real
exam scenarios.
1. In a modern computer system, how does the CPU coordinate instruction execution
using the control unit and system clock signals?
A. By storing all data in registers permanently
B. By generating timing signals and directing data flow between components
C. By replacing memory operations with I/O operations
D. By bypassing the ALU during execution
,Rationale: The control unit synchronizes operations using clock signals and directs how
data moves between CPU components.
2. When comparing RISC and CISC architectures, which statement best explains how
instruction complexity impacts execution efficiency and pipeline design?
A. RISC uses complex instructions requiring multiple cycles
B. CISC uses fewer registers than RISC
C. RISC uses simple instructions that improve pipeline efficiency and execution
speed
D. CISC eliminates the need for memory access
Rationale: RISC simplifies instructions, making pipelining more efficient and predictable.
3. How does cache memory improve overall system performance when compared to
accessing main memory directly for frequently used data?
A. By increasing disk storage capacity
B. By replacing RAM entirely
C. By storing frequently accessed data closer to the CPU for faster retrieval
D. By reducing instruction set size
Rationale: Cache reduces latency by keeping frequently used data near the CPU.
4. In a pipelined processor architecture, what is the primary impact of a data hazard
on instruction execution flow and performance?
A. It increases clock speed automatically
B. It causes delays or stalls due to dependencies between instructions
C. It eliminates memory access time
D. It simplifies ALU operations
Rationale: Data hazards occur when instructions depend on previous results, causing
pipeline stalls.
,5. What role does the Arithmetic Logic Unit (ALU) play in executing instructions that
involve both arithmetic calculations and logical comparisons?
A. It stores long-term data permanently
B. It performs mathematical operations and logical decision-making processes
C. It manages I/O device communication
D. It controls memory addressing exclusively
Rationale: The ALU executes arithmetic (add, subtract) and logical (AND, OR) operations.
6. How does virtual memory allow programs to execute efficiently even when the
system’s physical RAM is limited or partially utilized?
A. By increasing CPU clock speed
B. By disabling cache memory
C. By using disk storage to simulate additional memory through paging mechanisms
D. By eliminating secondary storage
Rationale: Virtual memory extends usable memory using disk space.
7. What is the primary difference between SRAM and DRAM in terms of structure,
speed, and typical usage within computer systems?
A. DRAM is faster and used in cache
B. SRAM uses capacitors and needs refreshing
C. SRAM is faster and used for cache, while DRAM is slower and used for main
memory
D. DRAM is more expensive than SRAM
Rationale: SRAM is faster but costly; DRAM is slower but cheaper for main memory.
8. How does instruction pipelining increase CPU throughput while still maintaining a
fixed clock cycle time for each stage of execution?
A. By reducing instruction count
B. By overlapping multiple instruction stages to execute simultaneously
C. By eliminating control units
, D. By storing instructions in registers permanently
Rationale: Pipelining overlaps execution phases to improve throughput.
9. What is the purpose of the program counter (PC) in managing the sequence of
instructions executed by the CPU during program execution?
A. Stores arithmetic results
B. Holds the address of the next instruction to be executed
C. Controls memory allocation
D. Stores user data
Rationale: PC tracks the next instruction address.
10. In memory hierarchy design, why are smaller, faster memory units placed closer
to the CPU while larger, slower ones are farther away?
A. To reduce cost only
B. To increase power consumption
C. To balance speed, cost, and capacity for optimal performance
D. To eliminate RAM
Rationale: Memory hierarchy optimizes speed vs. cost.
11. What happens during a cache miss, and how does it affect overall system
performance and instruction execution timing?
A. CPU stops permanently
B. Data must be fetched from slower main memory, increasing latency
C. Cache expands automatically
D. Instruction is deleted
Rationale: Cache miss increases access time.
12. How does a bus system facilitate communication between the CPU, memory, and
input/output devices in a computer architecture?
