Operating System [3i Infotech Placement]: Sample Questions 40 - 42 of 81

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Question 40

Operating System
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Write in Short

Short Answer▾

What are the processes that are not bothered by the swapper?

Explanation

Understanding of Zombie Process

Zombie process is a process that terminated but has not been cleaned up- Zombie process do not take physical memory.

Question 41

Operating System
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Write in Short

Short Answer▾

What is make command in Unix?

Explanation

  • Utility for building and maintaining groups of programs.
  • Determine automatically the pieces of a large program to be recompiled, and issue recompilation commands.
  • Make is not limited to programs- it can describe any task where some files must be updated automatically from others upon change.
  • This is done using a “make file” that describes the relationships among files, and the commands for updating each file.
  • In a program, executable file is updated from object files, which in turn are compiled from source files. These relationships are expressed in “make file”

Question 42

Operating System
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Describe in Detail

Essay▾

What is the difference between swapping and paging?

Explanation

Understanding Paging
Understanding of Swapping
Difference between Swapping and Paging
SwappingPaging
Whole process is moved from the swap device to the main memory for execution.The required memory pages are moved to main memory from the swap device for execution.
Process size is less than or equal to the main memory.Process size does not matter.
Easier to implement and less overhead to the system.Not easy to implement and more overhead to the system.
Less flexible than paging systems.Provides greater flexibility in mapping the virtual address space into the physical memory of the machine.

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