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Ohio Computer Repair Technician Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf
- What is the main function of the CPU in a computer system?
- Manage user input
- Store data permanently
- Process instructions
- Display graphics
Answer: C. Process instructions
Rationale: The CPU executes instructions and performs calculations;
it is the system’s processing core.
- Which type of memory is volatile?
A. ROM
B. SSD
C. RAM 1 / 4
- Flash
Answer: C. RAM
Rationale: RAM loses data when power is turned off; volatile means
temporary storage.
- What component converts AC power to DC power for the computer?
A. CPU
- Power Supply Unit (PSU)
- Motherboard
D. GPU
Answer: B. Power Supply Unit (PSU)
Rationale: The PSU converts alternating current to direct current for
internal components.
- Which connector is used for modern hard drives?
A. IDE
B. SATA
C. SCSI
D. PATA
Answer: B. SATA
Rationale: SATA is the current standard interface for connecting
storage drives.
- Which expansion slot offers the highest bandwidth for graphics cards?
A. PCI
B. AGP 2 / 4
- PCIe
D. ISA
Answer: C. PCIe
Rationale: PCI Express provides the fastest data transfer for modern
GPUs.
- The BIOS is stored in which type of memory?
A. RAM
B. EEPROM
- Cache
- Hard disk
Answer: B. EEPROM
Rationale: BIOS is stored in non-volatile memory that can be updated
via flashing.
- What is the function of thermal paste?
- Protects CPU pins
- Conducts electricity
- Enhances heat transfer between CPU and heatsink
- Prevents oxidation
Answer: C. Enhances heat transfer between CPU and heatsink
Rationale: Thermal paste fills microscopic gaps to improve heat
dissipation.
- What type of device is a router?
- Layer 1 3 / 4
- Layer 2
- Layer 3
- Layer 4
Answer: C. Layer 3
Rationale: Routers operate at the network layer, directing IP packets
between networks.
- Which port is used for digital video output?
A. VGA
B. HDMI
C. PS/2
D. RJ-45
Answer: B. HDMI
Rationale: HDMI transmits digital audio and video signals.
- The hexadecimal value "FF" equals what decimal number?
A. 254
B. 255
C. 256
D. 512
Answer: B. 255
Rationale: FF in base 16 equals 15×16 + 15 = 255 in decimal.
- What tool checks system memory errors?
A. CHKDSK
- MEMTEST
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