2888+ MCQ Questions in english हिन्दी

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API stands for:

Interface for software component interaction.

RAID level that mirrors data:

RAID 1 — redundancy through duplication.

A process state of “zombie” means:

Terminated yet still in process table.

Virtual memory uses:

Enables running larger programs than physical RAM.

Multitasking OS can run:

Handles concurrent processes.

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Two-factor authentication adds:

Enhances account security (e.g. code + password).

A firewall is used to:

Network security barrier

Phishing is:

deceitful emails/websites to steal info.

What does VPN do?

Protects privacy via secure tunneled connection.

Which is a symmetric encryption algorithm?

AES — same key for encryption/decryption.

DNS maps:

Translates human-friendly names to IPs.

HTTP uses which port by default?

Port 80 — standard web traffic.

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IP address uniquely identifies:

End device in network communication.

TCP stands for:

Reliable, connection-oriented transport protocol.

OSI model has how many layers?

Seven — layers from physical to application.

A full binary tree of height h has:

Maximum nodes in perfectly balanced tree.

Merge sort’s time complexity is:

Efficient, stable sort.

Big O of binary search on sorted array:

Logarithmic time — halving search space each step.

Which structure uses key-value pairs?

Hash map — fast lookups.

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A stack follows which access order?

Last In First Out — push/pop operations.

JavaScript primarily adds:

Client-side scripting for dynamic web pages.

CSS is used to

Cascading Style Sheets — visual styling.

HTML is used for:

Markup language for webpage layouts.

Which symbol marks the end of a statement in C/C++?

semicolon separates statements.

High-level programming languages are

Human-readable — e.g. Python, Java.

Floating-point numbers are used to represent:

Real numbers — scientific notation representation.

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A nibble is equal to:

4 bits — half a byte.

Unicode’s primary purpose is to:

Universal character encoding for global languages.

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