Computer MCQ Questions with answers

By default, documents are printed in Portrait mode, where the height of the page is greater than its width.

Other Options:

• (A) Landscape → Incorrect, as Landscape mode (where width is greater than height) is not the default setting.
• (C) Page Setup → Incorrect, as Page Setup is a menu option where you can change print settings.
• (D) Print View → Incorrect, as Print View is a display mode, not a print orientation.

Thus, the correct answer is (B) Portrait.

Java is widely used for developing multimedia webpages because:

• It supports applet-based web applications.
• It has powerful graphics and animation capabilities.
• It allows cross-platform compatibility, making it ideal for web-based multimedia applications.

Other Options:

• (A) COBOL → Used mainly for business, finance, and administrative systems.
• (C) BASIC → An older language mainly used for simple programming and learning.
• (D) Assembler → A low-level language used for hardware and system programming, not for multimedia web development.

Thus, the correct answer is (B) Java.

The first computers were programmed using machine language, which consists of binary code (0s and 1s) directly understood by the computer's hardware.

Other Options:

• (A) Assembly language → Introduced later as a more human-readable version of machine code.
• (C) Spaghetti code → A term for unstructured, difficult-to-read code, not a programming language.
• (D) Source code → A general term for any code written in a programming language before compilation.

Thus, the correct answer is (B) Machine language.

The processor (CPU - Central Processing Unit) consists of two main parts:

Control Unit (CU):

• Directs the flow of instructions and data within the CPU.
• Manages communication between different parts of the computer.

Arithmetic Logic Unit (ALU):

• Performs mathematical calculations (addition, subtraction, etc.).
• Handles logical operations (comparisons like greater than, less than, etc.).

Other Options Explained:

• (A) CPU and Main Memory → Incorrect. Main Memory (RAM) is separate from the processor.
• (B) Hard Disk and Floppy Drive → Incorrect. These are storage devices, not processor components.
• (D) Operating System and Application → Incorrect. These are software, not part of the processor.

Thus, the correct answer is (C) Control Unit and ALU.

A hybrid computer combines the features of both analog and digital computers:

Analog Characteristics:

• Processes continuous data (e.g., temperature, pressure, speed).
• Used in real-time simulations and scientific applications.

Digital Characteristics:

• Handles discrete data and performs logical operations.
• Used for precise calculations and data processing.

Other Options Explained:

• (A) Super and Micro Computers → Incorrect. These are different types of digital computers.
• (B) Mini and Micro Computers → Incorrect. Both are digital computers with different capacities.
• (D) Super and Mini Computers → Incorrect. Both belong to the digital category but differ in power.

Thus, the correct answer is (C) Analog and Digital Computers.

A compiler is a program that converts a high-level language (such as C, Java, or Python) into machine language (binary code) so that the computer can execute it. The compilation process happens before execution and translates the entire code at once.

Other Options Explained:

• (A) Linker → Combines multiple object files into a single executable file.
• (B) Assembler → Converts assembly language (low-level) into machine code, not high-level language.
• (C) Interpreter → Translates and executes line by line, unlike a compiler which translates the entire program at once.

Thus, the correct answer is (D) Compiler.

• COBOL (A) → A programming language used for business and finance applications.
• Visual Basic (B) → A programming language developed by Microsoft for building applications.
• HTML (C) → A markup language used to create webpages, but not a programming language.
• Netscape (D) → Not a programming language; it was a web browser developed in the 1990s.

Thus, Netscape is not a computer language, making option (D) the correct answer.

RAM (Random Access Memory) → Temporary memory where the program is loaded and executed by the CPU. It provides fast access to running applications.

• ROM (Read-Only Memory) → Stores firmware and system instructions, but programs are not executed from here.
• Hard Disk → Stores programs and data permanently but is not used for direct execution.
• Floppy Disk → An outdated storage medium, not used for executing programs.

Thus, while executing a program, it is held in RAM.

Correct answer: (C) MS-DOS and (D) LINUX
But if you can choose only one, then:

Best answer: (C) MS-DOS

Explanation:

(A) Mac OS X:
Primarily uses a Graphical User Interface (GUI), though it has a terminal with command-line capabilities (Unix-based).

(B) Windows 7:
Also primarily GUI-based, with optional access to Command Prompt.

(C) MS-DOS (Microsoft Disk Operating System):
A pure Command Line Interface (CLI) system — no GUI at all.

(D) LINUX:
Can run both CLI (via terminal/shell) and GUI (via desktop environments like GNOME, KDE). So, it supports CLI but is not CLI-only.

So:

• If the question expects only CLI-only OS, then (C) MS-DOS is the best choice.
• If multiple answers are allowed, then (C) and (D) are both correct.