What does a web browser perform when executing a 'DNS Lookup' operation? MCQ with Answer and Explanation

What does a web browser perform when executing a 'DNS Lookup' operation?
A. It downloads heavy multimedia files to local cache blocks.
B. It establishes a secure tunnel path via proxy configurations.
C. It queries DNS servers to resolve a domain name string into its underlying IP address.
D. It clears out localized hardware registry errors.
Answer: Option C
Solution (By JKExamLibrary)
DNS resolution looks up human-readable text domain destinations to find their matching numerical IP addresses so network connections can be established.

This question belongs to: Computer Internet and Web Technologies

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What does a '500 Internal Server Error' message from a web address generally represent?
A. The client computer has disconnected from its router box.
B. The specific webpage directory structure was typed incorrectly.
C. The user entered an incorrect account password.
D. A general-purpose error indicating that the server encountered an unexpected condition that prevented it from fulfilling the request.

Correct Answer: Option D


Explanation:
The 500 status code is a generic catch-all server-side error showing that the web server ran into a script configuration or system conflict preventing normal execution.

This question belongs to: Computer Internet and Web Technologies
Question #2 Report Error
What is the function of a web-based email client?
A. To send and receive email through a web browser
B. To manage calendar events
C. To store emails locally
D. To filter spam

Correct Answer: Option A


Explanation:
A web-based email client (e.g., Gmail, Outlook.com) allows users to access their email accounts through a browser without needing a dedicated email software.

This question belongs to: Computer Internet and Web Technologies
Question #3 Report Error
What does a '415 Unsupported Media Type' HTTP status code return imply about a client browser's interaction with a web application?
A. The requested URL path has changed its location permanently.
B. The input security certificate has an expired authorization date.
C. The server refuses to process the request because the payload data format or media type is not supported by the requested resource configuration.
D. The web server facility has completely crashed down.

Correct Answer: Option C


Explanation:
An HTTP 415 error occurs when the client uploads an asset or sends data in a format (such as an unapproved image type or raw XML instead of JSON) that the server script is not configured to accept.

This question belongs to: Computer Internet and Web Technologies