Which of the following Android components replaced the older Dalvik Virtual Machine (DVM) to provide faster app execution via Ahead-Of-Time (AOT) compilation? MCQ with Answer and Explanation

Question
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. Bionic Libc
B. Zygote Process
C. Android Runtime (ART)
D. Java Virtual Machine (JVM)
Answer: Option C
Solution (By JKSSB Mock Tests)
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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Question #1
Which of the following is a characteristic of a microkernel?
A. It is less modular than monolithic
B. Only essential services like IPC and memory management are in kernel space
C. It is faster than monolithic
D. All services are in kernel space
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Correct Answer: Option B

Explanation:
Microkernel keeps only minimal services in kernel mode, with drivers and file systems in user space, increasing modularity.
This question belongs to: Computer Operating Systems
Question #2
Which of the following is a type of real-time scheduling algorithm?
A. Priority Inheritance
B. Rate Monotonic
C. Round Robin
D. Lottery Scheduling
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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 #3
Which of the following is a feature of a preemptive multitasking system?
A. No process can be interrupted once started
B. Processes must voluntarily yield CPU
C. The OS can interrupt a process to give CPU time to another
D. Only one process runs at a time
Discuss
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Correct Answer: Option C

Explanation:
Preemptive multitasking allows the OS to forcibly preempt a running process to allocate CPU to another, ensuring responsiveness.
This question belongs to: Computer Operating Systems
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