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Govt. Examwise MCQ
2905+ MCQ Questions in english हिन्दी
NoSQL databases are designed for:
Schema-less storage like JSON docs or key-value pairs.
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ACID properties ensure:
Atomicity, consistency, isolation, durability.
A primary key:
Ensures each record is unique.
SQL stands for:
Used to manage relational databases.
SQL stands for:
Used to manage relational databases.
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.
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.
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.
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.
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