775 MCQ Questions in english हिन्दी

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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.

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.

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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.

A nibble is equal to:

4 bits — half a byte.

Unicode’s primary purpose is to:

Universal character encoding for global languages.

In ASCII, what decimal code represents capital ‘A’?

65 — standard character encoding.

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Binary “1010” represents the decimal number:

10 — 1×8 + 0×4 + 1×2 + 0×1

The smallest unit of data in computing is called a:

Arithmetic Logic Unit — performs mathematical and logical operations.

What is the main function of an operating system?

Design hardware

What does GPU stand for?

Graphics Processing Unit — handles rendering and visual tasks.

Which of these is non-volatile memory?

ROM — retains data even when power is off.

CPU — executes instructions and processes data.

Random Access Memory — volatile memory used for current tasks.

Which device is considered the brain of the computer?

CPU — executes instructions and processes data.

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Restriction enzymes are used to:

Restriction enzymes — create DNA fragments.

Restriction enzymes are used to:

Restriction enzymes — create DNA fragments.

A Western blot detects:

Proteins — using antibodies after electrophoresis.

CRISPR/Cas9 is used for:

Gene editing — targeted DNA modifications.

Gel electrophoresis separates biomolecules by:

Size and charge — fragments move through agarose.

PCR (polymerase chain reaction) amplifies:

DNA — through thermal cycling and DNA polymerase.

An ELISA test detects:

Antibodies/antigens — used for diagnosis (e.g., HIV).

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HIV primarily targets:

CD4⁺ T cells — leading to immune deficiency.

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