Which Android subsystem handles the core power management features to optimize battery consumption on mobile chipsets? MCQ with Answer and Explanation

Question
Which Android subsystem handles the core power management features to optimize battery consumption on mobile chipsets?
A. Wakelocks (via Linux kernel power drivers)
B. Surface Flinger Engine
C. Android Package Installer
D. Dalvik Cache Manager
Answer: Option A
Solution (By JKSSB Mock Tests)
Android utilizes specialized power management routines (such as Wakelocks) integrated into its Linux kernel base to regulate system sleep cycles and battery drain.
This question belongs to: Computer Operating Systems
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Question #1
In Windows, the 'System Information' tool (msinfo32) displays:
A. Startup programs
B. Event logs
C. Hardware resources, components, and software environment
D. Performance metrics
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Correct Answer: Option C

Explanation:
msinfo32 provides a comprehensive summary of system hardware, drivers, and software settings.
This question belongs to: Computer Operating Systems
Question #2
What does the acronym UEFI stand for?
A. Unified External Firmware Integration
B. Universal Extensible Firmware Integration
C. Universal Extended Firmware Interface
D. Unified Extensible Firmware Interface
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Correct Answer: Option D

Explanation:
UEFI is a modern firmware interface that replaces BIOS, offering faster boot, secure boot, and support for large hard drives.
This question belongs to: Computer Operating Systems
Question #3
Which Linux command is used to set or change the system's time zone?
A. timezone
B. date -s
C. timedatectl
D. tzselect
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Correct Answer: Option C

Explanation:
timedatectl set-timezone is the modern systemd command; tzselect is interactive but only sets environment.
This question belongs to: Computer Operating Systems
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