Jamia Millia Islamia MCA Operating System Previous Year Questions (PYQs) – Page 1 of 2
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Multi-user systems provided cost savings because they use a single processing unit to link several
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Solution
Terminals share a single processor in multi-user setup.
Which of the following are real-time systems?
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Solution
Real-time systems respond instantly to events; examples are aircraft or process control.
Which among the following is responsible for finding and loading operating system into RAM?
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Solution
The Bootstrap Loader locates the operating system and loads it into memory during startup.
Which of the following statements best explains a process?
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Solution
A **process** is a program that is currently being executed by the operating system.
However, more precisely — it is not just the program itself, but the **instance** of the program in execution, including its state, resources, and data.
Kernel is:
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Solution
The kernel is the core providing fundamental (primitive) services on which the rest of the OS runs.
A Disk Defragmenter is an example of –
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Solution
Solution:
A Disk Defragmenter is a **system utility** that rearranges fragmented data on a disk
so that files are stored in contiguous sectors, improving access speed and efficiency.
Hence, it belongs to the category of **Utility Programs**.
Which statement out of these is NOT correct about multiprocessor systems?
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Solution
Solution:
Statement (B) is **incorrect** — tightly coupled systems are **not** necessarily more energy-efficient than clusters; clusters can be optimized for energy efficiency.
Wellwer is a __________.
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Solution
“Wellwer” doesn’t correspond to any standard OS/CPU/mobile brand.
Which out of these statements is NOT true:
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Solution
Solution:
All three statements (A), (B), and (C) are correct according to C language behavior.
Hence, there is **no incorrect statement**.
Which of the following is an operating system?
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Solution
Symbian is a mobile operating system.
$\boxed{\text{Symbian}}$
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