In Android, what is the purpose of a 'Service' component? MCQ with Answer and Explanation

Question
In Android, what is the purpose of a 'Service' component?
A. To store shared data
B. To display a user interface
C. To perform long-running background operations without a user interface
D. To broadcast messages
Answer: Option C
Solution (By JKSSB Mock Tests)
Services run in the background to handle tasks like music playback or network operations, even when the app is not visible.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
Which Linux command is used to display the current environment variables?
A. printenv
B. env
C. set
D. All of the above
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Correct Answer: Option D

Explanation:
env, printenv, and set all display environment variables; set also shows shell variables.
This question belongs to: Computer Operating Systems
Question #2
Which of the following is a security feature in Windows that prevents unauthorized code from running?
A. User Account Control (UAC)
B. BitLocker
C. Windows Firewall
D. Windows Defender
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Correct Answer: Option A

Explanation:
UAC prompts users for permission when programs try to make system changes, preventing unauthorized actions.
This question belongs to: Computer Operating Systems
Question #3
Which of the following Android components replaced the older Dalvik Virtual Machine (DVM) to provide faster app execution via Ahead-Of-Time (AOT) compilation?
A. Android Runtime (ART)
B. Bionic Libc
C. Zygote Process
D. Java Virtual Machine (JVM)
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Correct Answer: Option A

Explanation:
ART (Android Runtime) replaced Dalvik starting from Android 5.0 (Lollipop), improving application performance through Ahead-Of-Time compilation.
This question belongs to: Computer Operating Systems
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