In Android, which component is used to receive and respond to system-wide broadcast announcements? MCQ with Answer and Explanation

In Android, which component is used to receive and respond to system-wide broadcast announcements?

A. Broadcast Receiver

B. Activity

C. Service

D. Content Provider

Answer: Option A

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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Question #1 Report Error

Which of the following is a file system used primarily on optical discs?

A. ISO 9660

B. HFS

C. NTFS

D. ext4

Correct Answer: Option A

Explanation:
ISO 9660 is the standard file system for CD-ROMs and DVDs; others are for hard drives.

This question belongs to: Computer Operating Systems

Question #2 Report Error

Which Linux terminal command displays information about the user account that is currently logged into the terminal session?

A. whoami

B. uname

C. id -g

D. pwd

Correct Answer: Option A

Explanation:
The 'whoami' command outputs the exact username of the current user account operating the terminal shell session.

This question belongs to: Computer Operating Systems

Question #3 Report Error

Which of the following is a characteristic of cooperative multitasking?

A. Processes must voluntarily yield control to allow others to run

B. It ensures fairness

C. It is used in modern operating systems

D. The OS forcibly preempts processes

Correct Answer: Option A

Explanation:
Cooperative multitasking relies on processes to yield CPU time; if a process hangs, the whole system may hang.

This question belongs to: Computer Operating Systems