What type of data bus interface layout transfers all bits of a single data word concurrently across multiple parallel trace lines on a motherboard? MCQ with Answer and Explanation

Question
What type of data bus interface layout transfers all bits of a single data word concurrently across multiple parallel trace lines on a motherboard?
A. Serial Interface
B. Asynchronous Channel
C. Parallel Interface
D. Isochronous Bus
Answer: Option C
Solution (By JKSSB Mock Tests)
Parallel interfaces use multiple distinct physical lines to send a collection of data bits (like an entire byte or word) at the exact same instant.
This question belongs to: Computer Memory and Storage Devices
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Question #1
Which data communication standard provides the thin physical wiring and interface protocol layer for connecting standard internal 2.5-inch hard drives to modern computer motherboards?
A. PATA / IDE
B. SATA (Serial ATA)
C. USB Type-C
D. SCSI interface
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Correct Answer: Option B

Explanation:
SATA (Serial Advanced Technology Attachment) is the standard point-to-point interface bus used to connect internal storage drives (HDDs/SSDs) and optical drives to modern computer systems.
This question belongs to: Computer Memory and Storage Devices
Question #2
What is the function of the control unit when interacting with computer memory?
A. It formats empty partitions into recognizable file structures like NTFS.
B. It directs the flow of data and instructions between the CPU registers and memory.
C. It permanently erases malicious software definitions from the ROM.
D. It translates physical data sectors into optical laser frequencies.
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Correct Answer: Option B

Explanation:
The control unit within the CPU coordinates data routing and instruction fetching operations between internal storage areas, registers, and system memory.
This question belongs to: Computer Memory and Storage Devices
Question #3
What is the typical speed of a 5400 RPM hard disk in terms of average latency?
A. 5.56 ms
B. 8.33 ms
C. 11.11 ms
D. 4.17 ms
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Correct Answer: Option A

Explanation:
At 5400 RPM, one rotation takes 60/5400 = 0.01111 seconds = 11.11 ms. Average rotational latency is half of that, about 5.56 ms.
This question belongs to: Computer Memory and Storage Devices
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