Quick Revision

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

Bubble sort worst-case complexity is?
O(n²)
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Which algorithm follows divide and conquer?
Merge sort
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Dynamic programming solves problems by?
Storing solutions to subproblems (memoization)
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Greedy algorithm?
Makes locally optimal choices at each step
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P in P vs NP complexity theory stands for?
Polynomial time solvable
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NP in P vs NP stands for?
Nondeterministic Polynomial
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Turing machine was proposed by?
Alan Turing
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Information Theory was founded by?
Claude Shannon
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What does 'open source' mean for software?
Source code is publicly available
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Which is an example of cloud storage?
Google Drive
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SaaS example is?
Google Workspace (Docs)
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Which is an example of IaaS?
Amazon EC2
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PaaS example is?
Microsoft Azure App Service
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A digital certificate is issued by?
Certificate Authority (CA)
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Two-factor authentication (2FA) uses?
Something you know + something you have/are
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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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Computer Fundamentals → Internet Basics 2

Which protocol secures email transmission?
SMTPS/STARTTLS
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Which of the following is NOT a search engine?
Wikipedia
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