What is the primary role of the Android 'AudioManager'? MCQ with Answer and Explanation

Question
What is the primary role of the Android 'AudioManager'?
A. To record audio
B. To manage Bluetooth audio
C. To play audio files
D. To control audio volume, rings, and sound modes
Answer: Option D
Solution (By JKSSB Mock Tests)
AudioManager manages system audio settings like volume levels, ringer mode, and audio focus.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
What is the primary function of the 'Spooler' service in modern desktop operating systems?
A. To optimize database queries.
B. To clean up invalid browser caches.
C. To coordinate multi-processor network scaling.
D. To intercept and hold document workloads intended for a slow peripheral printer, scheduling their sequential delivery.
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Correct Answer: Option D

Explanation:
The print spooler intercepts print jobs from applications, writes them to disk buffers, and streams them sequentially to the slower target printer hardware.
This question belongs to: Computer Operating Systems
Question #2
Which Linux command is used to change the password of the current user?
A. chpasswd
B. password
C. passwd
D. usrpasswd
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Correct Answer: Option C

Explanation:
passwd without arguments changes the current user's password; chpasswd is for batch changes.
This question belongs to: Computer Operating Systems
Question #3
In Windows, the 'System File Checker' (SFC) is used to:
A. Restore system settings
B. Check disk integrity
C. Scan and repair corrupted system files
D. Update system drivers
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Correct Answer: Option C

Explanation:
sfc /scannow verifies the integrity of protected system files and replaces incorrect versions.
This question belongs to: Computer Operating Systems
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