Which of the following conditions is NOT a necessary requirement for a deadlock to occur within an operating system environment? MCQ with Answer and Explanation

Question
Which of the following conditions is NOT a necessary requirement for a deadlock to occur within an operating system environment?
A. Circular Wait
B. Preemption
C. Mutual Exclusion
D. Hold and Wait
Answer: Option B
Solution (By JKSSB Mock Tests)
According to Coffman's conditions, deadlocks require *No Preemption*. If resources can be preempted, a deadlock situation can be broken or prevented.
This question belongs to: Computer Operating Systems
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Question #1
Which of the following is an example of a real-time operating system (RTOS)?
A. Android
B. VxWorks
C. Windows 10
D. Linux
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Correct Answer: Option B

Explanation:
VxWorks is a real-time OS used in embedded systems requiring deterministic response times; general-purpose OSes are not RTOS.
This question belongs to: Computer Operating Systems
Question #2
Which component of an Android application represents a single visible screen with a user interface layer that the user interacts with?
A. Broadcast Receiver
B. Service
C. Activity
D. Content Provider
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Correct Answer: Option C

Explanation:
An 'Activity' is the fundamental component that handles a single focused screen interface layout for user interaction.
This question belongs to: Computer Operating Systems
Question #3
Which component of the Android system architecture manages individual application installation and tracks package permissions?
A. PackageManager
B. Zygote Init
C. Dalvik Engine
D. SurfaceFlinger
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Correct Answer: Option A

Explanation:
The Android PackageManager service tracks installed APK packages, handles component resolution, and enforces application permissions.
This question belongs to: Computer Operating Systems
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