Which component of an operating system serves as the textual terminal interface, accepting typed keywords from a user and passing them to the kernel? MCQ with Answer and Explanation

Question

Which component of an operating system serves as the textual terminal interface, accepting typed keywords from a user and passing them to the kernel?

A. Linker Program

B. GUI Desktop Manager

C. Device Driver

D. Command Line Shell

Answer: Option D

Solution (By JKSSB Mock Tests)

The shell is the user interface program that wraps around the kernel, reading user text input commands and executing them.

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Question #1

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When a computer system is turned on, the initial software program that runs self-diagnostic hardware routines (known as POST) is the:

A. Disk Defragmenter

B. BIOS / UEFI Firmware

C. Operating System Core

D. Device Manager Panel

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Correct Answer: Option B

Explanation:
The BIOS/UEFI firmware initializes hardware and runs the Power-On Self-Test (POST) to ensure components are working before booting the OS.

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Question #2

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A specialized program that translates an entire high-level source code file into machine language all at once, creating an executable file, is known as a/an:

A. Assembler

B. Interpreter

C. Linker

D. Compiler

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Correct Answer: Option D

Explanation:
A compiler translates the entire source code into machine code in one single operation before execution, whereas an interpreter does it line-by-line.

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