What is the function of the Android 'MediaScanner'? MCQ with Answer and Explanation

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What is the function of the Android 'MediaScanner'?

A. To manage media codecs

B. To play media files

C. To scan media files and update the media database

D. To transcode media

Answer: Option C

Solution (By JKSSB Mock Tests)

MediaScanner scans storage for media files and adds metadata (artist, album) to the system database for apps to query.

This question belongs to: Computer Operating Systems

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Question #1

What is the primary role of the 'Zygote' process initialization step in Android?

A. To optimize disk defragmentation patterns.

B. To download application updates from the internet.

C. To encrypt user lock screen passwords securely.

D. To act as a warm prototype process that forks clean virtual machine instances for every newly opened application.

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Correct Answer: Option D

Explanation:
The Zygote process optimizes resource utilization by pre-loading core libraries and forking copies of itself to quickly launch individual apps.

This question belongs to: Computer Operating Systems

Question #2

In Android, the 'back stack' is used to:

A. Manage the navigation history of activities

B. Store system logs

C. Hold background services

D. Cache recent apps

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Correct Answer: Option A

Explanation:
Android uses a back stack to keep track of activities launched; pressing back pops the top activity.

This question belongs to: Computer Operating Systems

Question #3

In Windows, the 'PowerShell' command to get a list of running processes is:

A. tasklist

B. ps

C. All of the above

D. Get-Process

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Correct Answer: Option C

Explanation:
Get-Process (PowerShell), ps (alias), and tasklist (CMD) all list processes.

This question belongs to: Computer Operating Systems

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