TEXAS PROFESSIONAL ENGINEER
COMPUTER ENGINEERING LICENSING
EXAM ACTUAL 2026 VERIFIED QUESTIONS
WITH ANSWERS COMPREHENSIVE &
RATIONALE|INSTANT DOWNLOAD
1. In computer engineering, the primary purpose of a memory
management unit (MMU) in a modern processor is to:
A. Increase CPU clock frequency
B. Translate virtual addresses into physical addresses
C. Perform arithmetic operations
D. Manage peripheral device drivers
Answer: B. Translate virtual addresses into physical addresses
Rationale: The MMU provides address translation between the virtual
address space used by applications and the physical memory addresses
in RAM. It enables virtual memory, process isolation, and memory
protection. CPU frequency, arithmetic operations, and device drivers
are handled by different components.
2. A processor pipeline improves performance primarily by:
A. Increasing the size of cache memory
B. Allowing multiple instructions to overlap execution stages
C. Eliminating all branch instructions
D. Reducing transistor count
Answer: B. Allowing multiple instructions to overlap execution
stages
1
,Rationale: Pipelining divides instruction execution into stages such as
fetch, decode, execute, memory access, and write-back. Multiple
instructions can occupy different stages simultaneously, increasing
instruction throughput without necessarily reducing individual
instruction latency.
3. Which cache mapping technique allows a memory block to be
placed anywhere in the cache?
A. Direct mapping
B. Fully associative mapping
C. Set associative mapping
D. Static mapping
Answer: B. Fully associative mapping
Rationale: In fully associative cache mapping, any memory block can
occupy any cache location. This provides flexibility but requires more
complex hardware for tag comparisons. Direct mapping assigns each
block to one location, while set associative mapping provides a
compromise.
4. The main advantage of Reduced Instruction Set Computer
(RISC) architecture is:
A. Extremely complex instructions
B. Larger instruction execution times
C. Simple instructions optimized for pipeline execution
D. Elimination of registers
Answer: C. Simple instructions optimized for pipeline execution
Rationale: RISC processors use a smaller set of simple instructions
that typically execute in fewer cycles, allowing efficient pipelining and
2
,high throughput. Complex instruction sets are associated with CISC
architectures.
5. A system with an interrupt-driven I/O mechanism differs from
polling because:
A. The CPU continuously checks device status
B. Devices notify the CPU when service is required
C. Memory is no longer required
D. Data transfer becomes impossible
Answer: B. Devices notify the CPU when service is required
Rationale: Interrupt-driven systems allow peripherals to signal the
processor when attention is required, reducing wasted CPU cycles
compared with constant polling.
6. Which Boolean expression represents an XOR gate?
A. A + B
B. AB
C. A'B + AB'
D. A'B'
Answer: C. A'B + AB'
Rationale: XOR outputs HIGH only when inputs differ. The
expression A'B + AB' represents the two conditions where exactly one
input is true.
7. The primary purpose of a watchdog timer in embedded systems is
to:
3
, A. Increase memory capacity
B. Recover from software failures
C. Improve display resolution
D. Encrypt communication channels
Answer: B. Recover from software failures
Rationale: A watchdog timer resets the system if software becomes
unresponsive or fails to periodically reset the timer. It is widely used in
safety-critical embedded applications.
8. In digital electronics, setup time refers to:
A. Minimum time data must remain stable before a clock edge
B. Time required to power a device
C. Time required for memory deletion
D. Delay after output generation
Answer: A. Minimum time data must remain stable before a clock
edge
Rationale: Setup time specifies how long input data must be stable
before the triggering clock transition to ensure reliable storage in a
flip-flop.
9. A microcontroller differs from a microprocessor because it
typically includes:
A. Only a CPU
B. CPU, memory, and peripherals on one chip
C. No instruction execution capability
D. External-only memory
Answer: B. CPU, memory, and peripherals on one chip
4
COMPUTER ENGINEERING LICENSING
EXAM ACTUAL 2026 VERIFIED QUESTIONS
WITH ANSWERS COMPREHENSIVE &
RATIONALE|INSTANT DOWNLOAD
1. In computer engineering, the primary purpose of a memory
management unit (MMU) in a modern processor is to:
A. Increase CPU clock frequency
B. Translate virtual addresses into physical addresses
C. Perform arithmetic operations
D. Manage peripheral device drivers
Answer: B. Translate virtual addresses into physical addresses
Rationale: The MMU provides address translation between the virtual
address space used by applications and the physical memory addresses
in RAM. It enables virtual memory, process isolation, and memory
protection. CPU frequency, arithmetic operations, and device drivers
are handled by different components.
2. A processor pipeline improves performance primarily by:
A. Increasing the size of cache memory
B. Allowing multiple instructions to overlap execution stages
C. Eliminating all branch instructions
D. Reducing transistor count
Answer: B. Allowing multiple instructions to overlap execution
stages
1
,Rationale: Pipelining divides instruction execution into stages such as
fetch, decode, execute, memory access, and write-back. Multiple
instructions can occupy different stages simultaneously, increasing
instruction throughput without necessarily reducing individual
instruction latency.
3. Which cache mapping technique allows a memory block to be
placed anywhere in the cache?
A. Direct mapping
B. Fully associative mapping
C. Set associative mapping
D. Static mapping
Answer: B. Fully associative mapping
Rationale: In fully associative cache mapping, any memory block can
occupy any cache location. This provides flexibility but requires more
complex hardware for tag comparisons. Direct mapping assigns each
block to one location, while set associative mapping provides a
compromise.
4. The main advantage of Reduced Instruction Set Computer
(RISC) architecture is:
A. Extremely complex instructions
B. Larger instruction execution times
C. Simple instructions optimized for pipeline execution
D. Elimination of registers
Answer: C. Simple instructions optimized for pipeline execution
Rationale: RISC processors use a smaller set of simple instructions
that typically execute in fewer cycles, allowing efficient pipelining and
2
,high throughput. Complex instruction sets are associated with CISC
architectures.
5. A system with an interrupt-driven I/O mechanism differs from
polling because:
A. The CPU continuously checks device status
B. Devices notify the CPU when service is required
C. Memory is no longer required
D. Data transfer becomes impossible
Answer: B. Devices notify the CPU when service is required
Rationale: Interrupt-driven systems allow peripherals to signal the
processor when attention is required, reducing wasted CPU cycles
compared with constant polling.
6. Which Boolean expression represents an XOR gate?
A. A + B
B. AB
C. A'B + AB'
D. A'B'
Answer: C. A'B + AB'
Rationale: XOR outputs HIGH only when inputs differ. The
expression A'B + AB' represents the two conditions where exactly one
input is true.
7. The primary purpose of a watchdog timer in embedded systems is
to:
3
, A. Increase memory capacity
B. Recover from software failures
C. Improve display resolution
D. Encrypt communication channels
Answer: B. Recover from software failures
Rationale: A watchdog timer resets the system if software becomes
unresponsive or fails to periodically reset the timer. It is widely used in
safety-critical embedded applications.
8. In digital electronics, setup time refers to:
A. Minimum time data must remain stable before a clock edge
B. Time required to power a device
C. Time required for memory deletion
D. Delay after output generation
Answer: A. Minimum time data must remain stable before a clock
edge
Rationale: Setup time specifies how long input data must be stable
before the triggering clock transition to ensure reliable storage in a
flip-flop.
9. A microcontroller differs from a microprocessor because it
typically includes:
A. Only a CPU
B. CPU, memory, and peripherals on one chip
C. No instruction execution capability
D. External-only memory
Answer: B. CPU, memory, and peripherals on one chip
4
