Which Android version introduced the concept of runtime permissions, allowing users to grant or deny permissions dynamically rather than during app installation? MCQ with Answer and Explanation

Question

Which Android version introduced the concept of runtime permissions, allowing users to grant or deny permissions dynamically rather than during app installation?

A. Android 6.0 Marshmallow

B. Android 5.0 Lollipop

C. Android 2.3 Gingerbread

D. Android 4.4 KitKat

Answer: Option A

Solution (By JKSSB Mock Tests)

Android 6.0 Marshmallow completely overhauled the application permission model by introducing runtime permissions to enhance user data security.

This question belongs to: Computer Operating Systems

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Question #1

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Which of the following is a type of real-time scheduling algorithm?

A. Lottery Scheduling

B. Rate Monotonic

C. Priority Inheritance

D. Round Robin

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Correct Answer: Option B

Explanation:
Rate Monotonic is a fixed-priority real-time scheduling algorithm for periodic tasks; others are general-purpose.

This question belongs to: Computer Operating Systems

Question #2

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Which of the following is an advantage of using a 64-bit OS over 32-bit?

A. Lower hardware requirements

B. More memory support and larger file sizes

C. Faster processing of 32-bit applications

D. Better security features like hardware DEP

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Correct Answer: Option B

Explanation:
64-bit OS supports more RAM and can handle larger file sizes; security features are not exclusive to 64-bit.

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Question #3

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What structural component converts high-level programming instructions directly into a series of system calls handled by the operating system kernel?

A. API Framework or Standard Runtime Libraries

B. Hardware Abstraction Layer

C. Master Boot Sector

D. BIOS Chipset

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Correct Answer: Option A

Explanation:
Application Programming Interfaces (APIs) and runtime libraries bridge user applications to the underlying system calls of the operating system kernel.

This question belongs to: Computer Operating Systems

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