Which component of an Android application represents a single visible screen with a user interface layer that the user interacts with? MCQ with Answer and Explanation

Question
Which component of an Android application represents a single visible screen with a user interface layer that the user interacts with?
A. Service
B. Activity
C. Broadcast Receiver
D. Content Provider
Answer: Option B
Solution (By JKSSB Mock Tests)
An 'Activity' is the fundamental component that handles a single focused screen interface layout for user interaction.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
Which type of booting occurs when the system starts from a powered-off state?
A. Reboot
B. Cold boot
C. Warm boot
D. Soft boot
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Correct Answer: Option B

Explanation:
A cold boot is starting the computer from a completely powered-off state, performing full POST and boot sequence.
This question belongs to: Computer Operating Systems
Question #2
Which of the following is an example of a network operating system?
A. Android
B. macOS
C. Windows Server
D. Linux Desktop
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Correct Answer: Option C

Explanation:
A network OS like Windows Server provides services for network management, file sharing, and user administration across a network.
This question belongs to: Computer Operating Systems
Question #3
In Android, which component is used to receive and respond to system-wide broadcast announcements?
A. Service
B. Broadcast Receiver
C. Content Provider
D. Activity
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Correct Answer: Option B

Explanation:
Broadcast Receivers listen for system events (like boot completed, battery low) and allow apps to respond.
This question belongs to: Computer Operating Systems
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