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GK One-Line Question & Answer

15541+ short questions with short answers, covering every category and sub-category on the site — no long articles to scroll through. Good for a fast recap before an exam, or a few minutes of daily practice.

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Computer Fundamentals → Introduction to Computer 38

Biometric authentication includes?
Fingerprint, iris, face recognition
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Which type of attack overwhelms a server with requests?
DDoS
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SQL injection attack exploits?
Unvalidated user input in SQL queries
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Cross-site scripting (XSS) attack injects?
Malicious scripts into web pages viewed by others
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A honeypot in cybersecurity is?
Decoy system to detect attackers
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Zero-day vulnerability is?
Unknown vulnerability without available patch
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Patch management involves?
Applying security updates to software
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Intrusion Detection System (IDS) does?
Monitors and alerts on suspicious activity
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Intrusion Prevention System (IPS) does?
Monitors and actively blocks threats
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HTTPS certificate proves?
Identity of the website and enables encryption
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Browser cookies are used to?
Store user session data and preferences
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HTML tag for hyperlink is?
<a>
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CSS property for text color is?
color
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Which HTML tag creates a table?
<table>
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HTTP response code 404 means?
Not found
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HTTP response code 200 means?
OK (success)
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HTTP response code 500 means?
Internal server error
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Which HTTP method is used to submit form data?
POST
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GET vs POST: GET sends data via?
URL query string
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RESTful API DELETE method is used for?
Deleting resources
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XML and JSON are both?
Data interchange formats
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Which of the following is a NoSQL database?
MongoDB
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NoSQL databases are preferred for?
Unstructured big data
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ACID properties of databases stand for?
Atomicity, Consistency, Isolation, Durability
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Atomicity in ACID means?
All operations in a transaction succeed or none do
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Which type of index speeds up SELECT queries?
B-tree index
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ERD stands for in database design?
Entity Relationship Diagram
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Which SQL clause filters query results?
WHERE
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HAVING clause is used with?
GROUP BY
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Which aggregate function counts rows?
COUNT()
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Stored procedure in SQL is?
A saved SQL script executed by name
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A view in SQL is?
A virtual table based on a query
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Trigger in SQL executes?
Automatically in response to INSERT/UPDATE/DELETE
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Transaction control commands include?
COMMIT, ROLLBACK
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DCL in SQL stands for?
Data Control Language
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DDL in SQL stands for?
Data Definition Language
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DML in SQL stands for?
Data Manipulation Language
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Which normal form removes partial dependencies?
2NF
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Computer Fundamentals → Internet Basics 1

Which of the following is NOT a search engine?
Wikipedia
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Computer Fundamentals → Memory Units 1

Which SQL keyword removes duplicate rows from results?
DISTINCT
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