Wipro interview 1995

Wipro Infotech Ltd., Bangalore.
Year: 1995

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Wipinfo has 2 rounds of interviews. The first round is fully technical.
The second round, depending on the members of the board, may be technical,
semi-technical or personal.Last year the second round was more
technical than the first(!) and the board was headed by Mr. P.V.Sanjeeva
Reddy, one of the no-nonsense, hardcore-technical, project leaders
in Infotech. This year it was headed by Mr. Victor Jayakiran, G.M.
(Technical, Global R&D) who was a much sober man and therefore spent
most of the time in the second round dealing with personal questions.
I detail here the technical questions asked in the first round --

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[1] Tell us about your work in brief.

My Ans. Mention first the title, followed by a brief overview of the

work, what we plan to achieve, what has been achieved so far, finally

the relevance/scope of the work to the related area.
(i.e. how is it going to be useful).
[ 5-10 mins. depending on interest of the listener.]

[2..n] Questions related to the work.
Ans. Area dependent. [ ~ 10 mins ]

Tell us what you know about DMA and why that is needed?
My Ans. As usual, mentioned the wastage of CPU computation power spent in busy-waiting. Told how DMA works.

What are the various types of scheduling algo, what is used by UNIX?
My Ans. Mentioned Round Robin, First-come-first-served,Shortest-job-first, Earliest-deadline-first, Least-laxity-first,
Priority-based-event-driven. UNIX uses RR with multi-level feedback.

How can you implement SJF in UNIX?
My Ans. Usually, SJF means that we know the job-duration in advance. In UNIX where we cannot know that, we have to make assumptions about that based on which we should initially schedule. Periodically however, we have to fine-tune our initial assumptions based on the times taken by various ready jobs, and recompute estimates and change the schedule accordingly.

Different types of subroutine calling conventions?
My Ans. Call by value, reference, value-result.

Parameter passing sequence used by C?
My Ans. Rightmost parameter pushed first on stack.

What is a page-fault and how is it handled in UNIX?
My Ans. [Refer to MJBach, Ch. 9 for details].

Personal questions in the first round --
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1. What was your overall position in the Univ. in B.E.

2. Why did you choose to join MS here.

3. How do you like the MS course.

4. Anything you want to know about us.



Technical Questions in the second round
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[1] What are the current trends and areas of focus in IT.

My Ans. Talked about emerging trends of S/W Engg and ISO 9000 stuff
(gave vague ideas about them as I don't know much nor do I care about these topics myself ;-)).
Then mentioned the proliferation of O-O methodologies and their usefulness in speeding up development process,
code re-usability, ease of maintenance, ease of bug-fixing.
Thirdly, mentioned the work going on in High-Speed N/w - FDDI, ATM,
Fast-Ethernet(100Mbps). Told whatever little I knew about ATM in response to another question.

[2] What is a Micro-Kernel architecture.
My Ans. This is a developing area in OSs where instead of building the

kernel as a single monolithic structure starting from scratch, it is built as a set of layers.
The micro-kernel provides only the bare-bones like Device-drivers, rudimentary filesystem support etc.
on which,depending on the intended area of application of the OS, it can be customized to provide various higher level OS features like
Multiprocessing, IPC, etc.

Personal Questions in the second round --
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1. Tell us about yourself, your background.

2. What does your father do currently.

3. Your performance in schooling, B.E.

4. Your +/- points.

5. Why do you think Wipro should take you.

6. What qualities do you have that make you a person suitable for going

into the IT industry (a corollary to the previous question).

7. What do your friends opine about you.

8. When do you think you will complete and be able to join.

9. How can you assure that you will join by that time.

10. Anything you want to know about us.

ALL THE BEST