Which of the following is a popular JavaScript library for building user interfaces? MCQ with Answer and Explanation

Question
Which of the following is a popular JavaScript library for building user interfaces?
A. Angular
B. All of the above
C. Vue.js
D. React
Answer: Option B
Solution (By JKSSB Mock Tests)
React, Angular, and Vue.js are all popular JavaScript frameworks/libraries for building front-end user interfaces.
This question belongs to: Computer Internet and Web Technologies
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Question #1
What is the primary operational distinction of a 'Web Server' compared to a traditional 'Database Server'?
A. A web server reads incoming email files exclusively via POP3 paths.
B. A web server processes HTTP requests to deliver web page content; a database server manages structured data tables.
C. A web server is responsible for allocating local IP configurations dynamically.
D. A web server is purely a physical hardware chip; a database server is software.
Discuss
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Correct Answer: Option B

Explanation:
Web servers (like Apache or Nginx) listen for HTTP requests to deliver HTML and web assets to browsers, while database servers (like MySQL or Oracle) store and query raw tabular data collections.
This question belongs to: Computer Internet and Web Technologies
Question #2
What is the function of the 'Referrer-Policy' HTTP header?
A. To control how much referrer information is sent with requests
B. To set a custom referrer
C. To enable cross-origin requests
D. To block referrer information
Discuss
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Correct Answer: Option A

Explanation:
Referrer-Policy defines the amount of referrer information (URL of previous page) that should be included in requests, for privacy and security.
This question belongs to: Computer Internet and Web Technologies
Question #3
Which of the following is a common port used for MySQL database connections?
A. 3306
B. 5432
C. 1433
D. 1521
Discuss
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Correct Answer: Option A

Explanation:
Port 3306 is the default for MySQL. Port 5432 is PostgreSQL, 1521 is Oracle, 1433 is Microsoft SQL Server.
This question belongs to: Computer Internet and Web Technologies
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