What does a web browser perform when executing a 'DNS Lookup' operation?
A. It establishes a secure tunnel path via proxy configurations.
B. It queries DNS servers to resolve a domain name string into its underlying IP address.
C. It clears out localized hardware registry errors.
D. It downloads heavy multimedia files to local cache blocks.
Answer: Option B
Solution (By JKSSB Mock Tests)
DNS resolution looks up human-readable text domain destinations to find their matching numerical IP addresses so network connections can be established.
Which of the following parameters represents an accurate description of the web development concept called 'OAuth'?
A.An open-standard authorization framework that allows third-party applications to grant limited, secure access to user account resources without exposing user passwords
B.A physical computer processing core chip standard
C.A specialized local browser button designed to clear cache history
D.An unlinked text configuration archive stored on local devices
Explanation:
OAuth enables secure token-based authorization, allowing applications (like a mobile game) to access user profile data from a provider (like Google) without requiring their raw login password.
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