What is the primary function of the Android 'Activity Manager' service? MCQ with Answer and Explanation

What is the primary function of the Android 'Activity Manager' service?
A. To manage the operational lifecycle of applications and regulate the navigation stack of active user screens.
B. To download APK files from cloud application stores.
C. To track hardware battery percentage details dynamically.
D. To compile native C source files into machine code.
Answer: Option A
Solution (By JKSSB Mock Tests)
The Activity Manager monitors system activities, manages application processes, handles task stacks, and enforces runtime runtime constraints.

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Practice More Operating Systems Questions

Question #1
Which of the following components of an Operating System remains permanently in the main memory (RAM) during the entire computer session?
A. Compiler
B. Kernel
C. Device Driver
D. Application Software

Correct Answer: Option B


Explanation:
The kernel is the core component of an Operating System that is loaded into the main memory during booting and remains there until the system is shut down.

This question belongs to: Computer Operating Systems
Question #2
Which Linux pseudo-filesystem acts as an interface to internal kernel data structures, allowing users to query live CPU parameters or memory statistics via text files?
A. /etc
B. /bin
C. /proc
D. /lib

Correct Answer: Option C


Explanation:
The '/proc' directory is a virtual, process information pseudo-filesystem that exposes live kernel statistics and active process metadata as text files.

This question belongs to: Computer Operating Systems
Question #3
Which component of a process contains its local variables, function parameters, and return addresses during execution?
A. Stack
B. Heap
C. Data Section
D. Code Section

Correct Answer: Option A


Explanation:
The stack segment of a process manages temporary execution details like active function call parameters, local variables, and instruction return paths.

This question belongs to: Computer Operating Systems