WGU C952 Computer Architecture
OBJECTIVE ASSESSMENT ACTUAL
EXAM 2025/2026 QUESTIONS WITH
VERIFIED CORRECT SOLUTIONS || 100%
GUARANTEED PASS
<BRAND NEW VERSION>
1. Datapath - ANSWER ✓ The component of the processor that performs
arithmetic operations
2. Control - ANSWER ✓ The component of the processor that commands the
datapath, memory, and I/O devices according to the instructions of the
program.
3. Integrated circuit - ANSWER ✓ Also called a chip. A device combining
dozens to millions of transistors.
4. Central processor unit (CPU) - ANSWER ✓ Also called processor. The
active part of the computer, which contains the datapath and control and
which adds numbers, tests numbers, signals I/O devices to activate, and so
on.
5. Static random access memory (SRAM) - ANSWER ✓ Also memory built as
an integrated circuit, but faster and less dense than DRAM.
6. Instruction set architecture - ANSWER ✓ Also called architecture. An
abstract interface between the hardware and the lowest-level software that
encompasses all the information necessary to write a machine language
, program that will run correctly, including instructions, registers, memory
access, I/O, and so on.
7. Application binary interface (ABI) - ANSWER ✓ The user portion of the
instruction set plus the operating system interfaces used by application
programmers. It defines a standard for binary portability across computers.
8. Volatile memory - ANSWER ✓ Storage, such as DRAM, that retains data
only if it is receiving power.
9. Nonvolatile Memory - ANSWER ✓ A form of memory that retains data
even in the absence of a power source and that is used to store programs
between runs. A DVD disk is nonvolatile.
10.Magnetic disk - ANSWER ✓ Also called hard disk. A form of nonvolatile
secondary memory composed of rotating platters coated with a magnetic
recording material. Because they are rotating mechanical devices, access
times are about 5 to 20 milliseconds and cost per gigabyte in 2012 was $0.05
to $0.10
11.Main memory - ANSWER ✓ Also called primary memory. Memory used to
hold programs while they are running; typically consists of DRAM in
today's computers.
12.Secondary memory - ANSWER ✓ Nonvolatile memory used to store
programs and data between runs; typically consists of flash memory in
PMDs and magnetic disks in servers.
13.Flash memory - ANSWER ✓ A nonvolatile semiconductor memory. It is
cheaper and slower than DRAM but more expensive per bit and faster than
magnetic disks. Access times are about 5 to 50 microseconds and cost per
gigabyte in 2012 was $0.75 to $1.00.
14.Single Instruction Single Data (SISD) - ANSWER ✓ A uniprocessor
15.Multiple Instruction Multiple Data (MIMD) - ANSWER ✓ A
multiprocessor.
,16.Single Program, Multiple Data Streams (SPMD) - ANSWER ✓ The
conventional MIMD programming model, where a single program runs
across all processors.
17.Single Instruction Stream, Multiple Data Streams (SIMD) - ANSWER ✓
The same instruction is applied to many data streams, as in a vector
processor.
18.Data-level parallelism - ANSWER ✓ Parallelism achieved by performing
the same operation on independent data
19.vector-based code - ANSWER ✓
20.conventional code - ANSWER ✓
21.LEGv8 - ANSWER ✓ assembly instructions
22.multimedia extensions (MMX) - ANSWER ✓ An expanded set of
instructions supported by a processor that provides multimedia-specific
functions.
23.data hazard (pipeline data hazard) - ANSWER ✓ When a planned
instruction cannot execute in the proper clock cycle because data that is
needed to execute the instruction are not yet available.
24.What is an advantage of multiprocessor architecture? - ANSWER ✓ It
increases throughput
25.In which type of multiprocessor is latency to any word in main memory the
same regardless of which processor requests access? - ANSWER ✓ Uniform
memory access
26.Which benefit does pipelining a set of instructions provide? - ANSWER ✓
The throughput of the complete set of instructions is increased.
27.Given four sets of ARM instructions that take the same amount of time and
processing power to execute. How much faster would the instructions
, complete if executed 1,000 times using a pipelining methodology? -
ANSWER ✓ 4 times
28.What is improved from all LEGv8 instructions having the same 32-bit
length? - ANSWER ✓ Pipelining
29.What is the final value in X10 when the following code completes, given
that X6 contains 20, X7 contains 10, and X8 contains 20? SUB X9, X7,
X6CBZ X6, AAAADD X9, XZR, #1 B ZZZAAA SUB X9, X8, X6CBNZ
X6, ZZZ ADD X9, XZR, #2ZZZ ADD X10, XZR, X9 - ANSWER ✓ 1
30.How can the CPU performance of a program be improved? - ANSWER ✓
By reducing the number of clock cycles
31.A program runs alone on a CPU. The CPU clock rate is 3e9 cycles per
second, i.e., 3 GHz. It takes the CPU 15e9 clock cycles to complete the
program. The CPU clock cycle time is 500e-12 second, i.e., 500
picoseconds. How many seconds is the CPU performance for the task? -
ANSWER ✓ 7.5
32.A cache has 16 one-word blocks. Memory blocks are mapped to fully
associative caches. Memory block is 15. What is the cache position given
the cache configuration and memory block? - ANSWER ✓ Any of the 16
cache blocks
33.A program has a CPI of 10 on a target platform. The processor pipeline is
expanded and clock rate is increased by a factor of 5, but the CPI fails to
decrease accordingly. Which factor is negatively affecting performance? -
ANSWER ✓ Cache memory
34.response time - ANSWER ✓ Also known asExecution Time. The total time
required for the computer to complete a task, including disk accesses,
memory accesses, I/O activities, operating system overhead, CPU execution
time, and so on.
35.execution time - ANSWER ✓ Also known as Response Time. The total time
required for the computer to complete a task, including disk accesses,
OBJECTIVE ASSESSMENT ACTUAL
EXAM 2025/2026 QUESTIONS WITH
VERIFIED CORRECT SOLUTIONS || 100%
GUARANTEED PASS
<BRAND NEW VERSION>
1. Datapath - ANSWER ✓ The component of the processor that performs
arithmetic operations
2. Control - ANSWER ✓ The component of the processor that commands the
datapath, memory, and I/O devices according to the instructions of the
program.
3. Integrated circuit - ANSWER ✓ Also called a chip. A device combining
dozens to millions of transistors.
4. Central processor unit (CPU) - ANSWER ✓ Also called processor. The
active part of the computer, which contains the datapath and control and
which adds numbers, tests numbers, signals I/O devices to activate, and so
on.
5. Static random access memory (SRAM) - ANSWER ✓ Also memory built as
an integrated circuit, but faster and less dense than DRAM.
6. Instruction set architecture - ANSWER ✓ Also called architecture. An
abstract interface between the hardware and the lowest-level software that
encompasses all the information necessary to write a machine language
, program that will run correctly, including instructions, registers, memory
access, I/O, and so on.
7. Application binary interface (ABI) - ANSWER ✓ The user portion of the
instruction set plus the operating system interfaces used by application
programmers. It defines a standard for binary portability across computers.
8. Volatile memory - ANSWER ✓ Storage, such as DRAM, that retains data
only if it is receiving power.
9. Nonvolatile Memory - ANSWER ✓ A form of memory that retains data
even in the absence of a power source and that is used to store programs
between runs. A DVD disk is nonvolatile.
10.Magnetic disk - ANSWER ✓ Also called hard disk. A form of nonvolatile
secondary memory composed of rotating platters coated with a magnetic
recording material. Because they are rotating mechanical devices, access
times are about 5 to 20 milliseconds and cost per gigabyte in 2012 was $0.05
to $0.10
11.Main memory - ANSWER ✓ Also called primary memory. Memory used to
hold programs while they are running; typically consists of DRAM in
today's computers.
12.Secondary memory - ANSWER ✓ Nonvolatile memory used to store
programs and data between runs; typically consists of flash memory in
PMDs and magnetic disks in servers.
13.Flash memory - ANSWER ✓ A nonvolatile semiconductor memory. It is
cheaper and slower than DRAM but more expensive per bit and faster than
magnetic disks. Access times are about 5 to 50 microseconds and cost per
gigabyte in 2012 was $0.75 to $1.00.
14.Single Instruction Single Data (SISD) - ANSWER ✓ A uniprocessor
15.Multiple Instruction Multiple Data (MIMD) - ANSWER ✓ A
multiprocessor.
,16.Single Program, Multiple Data Streams (SPMD) - ANSWER ✓ The
conventional MIMD programming model, where a single program runs
across all processors.
17.Single Instruction Stream, Multiple Data Streams (SIMD) - ANSWER ✓
The same instruction is applied to many data streams, as in a vector
processor.
18.Data-level parallelism - ANSWER ✓ Parallelism achieved by performing
the same operation on independent data
19.vector-based code - ANSWER ✓
20.conventional code - ANSWER ✓
21.LEGv8 - ANSWER ✓ assembly instructions
22.multimedia extensions (MMX) - ANSWER ✓ An expanded set of
instructions supported by a processor that provides multimedia-specific
functions.
23.data hazard (pipeline data hazard) - ANSWER ✓ When a planned
instruction cannot execute in the proper clock cycle because data that is
needed to execute the instruction are not yet available.
24.What is an advantage of multiprocessor architecture? - ANSWER ✓ It
increases throughput
25.In which type of multiprocessor is latency to any word in main memory the
same regardless of which processor requests access? - ANSWER ✓ Uniform
memory access
26.Which benefit does pipelining a set of instructions provide? - ANSWER ✓
The throughput of the complete set of instructions is increased.
27.Given four sets of ARM instructions that take the same amount of time and
processing power to execute. How much faster would the instructions
, complete if executed 1,000 times using a pipelining methodology? -
ANSWER ✓ 4 times
28.What is improved from all LEGv8 instructions having the same 32-bit
length? - ANSWER ✓ Pipelining
29.What is the final value in X10 when the following code completes, given
that X6 contains 20, X7 contains 10, and X8 contains 20? SUB X9, X7,
X6CBZ X6, AAAADD X9, XZR, #1 B ZZZAAA SUB X9, X8, X6CBNZ
X6, ZZZ ADD X9, XZR, #2ZZZ ADD X10, XZR, X9 - ANSWER ✓ 1
30.How can the CPU performance of a program be improved? - ANSWER ✓
By reducing the number of clock cycles
31.A program runs alone on a CPU. The CPU clock rate is 3e9 cycles per
second, i.e., 3 GHz. It takes the CPU 15e9 clock cycles to complete the
program. The CPU clock cycle time is 500e-12 second, i.e., 500
picoseconds. How many seconds is the CPU performance for the task? -
ANSWER ✓ 7.5
32.A cache has 16 one-word blocks. Memory blocks are mapped to fully
associative caches. Memory block is 15. What is the cache position given
the cache configuration and memory block? - ANSWER ✓ Any of the 16
cache blocks
33.A program has a CPI of 10 on a target platform. The processor pipeline is
expanded and clock rate is increased by a factor of 5, but the CPI fails to
decrease accordingly. Which factor is negatively affecting performance? -
ANSWER ✓ Cache memory
34.response time - ANSWER ✓ Also known asExecution Time. The total time
required for the computer to complete a task, including disk accesses,
memory accesses, I/O activities, operating system overhead, CPU execution
time, and so on.
35.execution time - ANSWER ✓ Also known as Response Time. The total time
required for the computer to complete a task, including disk accesses,
