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Operating System – Technical interview questions

Some Interview Questions Related To Operating Systems

Give an example of micro-kernel.
When would you choose bottom up methodology?
When would you choose top down methodology?
Describe different job scheduling in operating systems.
What is a Real-Time System ?
What is the difference between Hard and Soft real-time systems ?
What is a mission critical system ?
What is the important aspect of a real-time system ?
If two processes which shares same system memory and system clock in a distributed system, What is it called?
What is the state of the processor, when a process is waiting for some event to occur?
What do you mean by deadlock?
Explain the difference between microkernel and macro kernel.
Write a small dc shell script to find number of FF in the design.
Why paging is used ?
Which is the best page replacement algorithm and Why? How much time is spent usually in each phases and why?
What are the basic functions of an operating system?
Explain briefly about, processor, assembler, compiler, loader, linker and the functions executed by them.
What are the difference phases of software development? Explain briefly?
Differentiate between RAM and ROM?
What is DRAM? In which form does it store data?
What is cache memory?
What is hard disk and what is its purpose?
Differentiate between Compiler and Interpreter?
What are the different tasks of Lexical analysis?
What are the different functions of Syntax phase, Scheduler?
What are the main difference between Micro-Controller and Micro- Processor?
Difference between Primary storage and secondary storage?
What is multi-tasking, multi programming, multi-threading?
Difference between multi-threading and multi-tasking?
What is software life cycle?
Demand paging, page faults, replacement algorithms, thrashing, etc.
Explain about paged segmentation and segment paging
While running DOS on a PC, which command would be used to duplicate the entire diskette?

Knowing all basic questions you can prepare these questions and can attend technical interviews confidently.
Hope these questions will help you getting your dream job!

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Aptitude Test Practice Questions - With Answers

Question 1. Which of the following is least like the others?
A.    cube
B.    sphere
C.    pyramid
D.    circle

D (because the circle is the only two-dimensional figure)

Question 2. Consider a language which uses the following set of characters:
Small set: { a b c }
Large set: { A B C }
Punctuation set: { x y }
This language must follow the following rules:
  1.    A punctuation character must end all series.
  2.    A series can have up to but no more than 4          characters,including punctuation characters.

Does the following series follow all the rules of the language defined above?
  A.    Yes
  B.    No

A (the series has only four characters and ends in a punctuation character)

Question 3. Consider the following flow chart for a customer:

The person in No.1 is:
    A.   Married, with children
    B.   Married, with at least one son
    C.   Unmarried, with at least one daughter
    D.   Unmarried, with at least one son
    E.   Unmarried, with no children