Friday, March 29, 2019

Barc Scientists Interview. 

Name: -Sachin Solanki
Interview date: -July 21

There were 7 members in the panel. 
The questions started. 

To prepare for Mtech interviews in IITs click here. 

1. Have you prepared for the interview? 

I confessed, "Sorry sir, my final year exams over just yesterday and I haven't brushedup a single subject but I'm confident enough about the basics of all the electronics subjects and also my final semester subjects. 

2.What are your final year subject? 

I answered, " VLSI design. 
                         Mobile communication. 
                         TV and RADAR. 
                         Advance communication. 

They told ,"okey then ,we will Start with VLSI design. 

3.How you can make Inductor, Capacitor, Resister using VLSI design? 

4. What is input/output graph of inverter? 

5. Draw circuit diagram of inverter.  How you can make clock using arrangement ?

6. Your Biodata says you have completed training in VLSI,  just give the full form of SPICE software and explain its working. 

7.Basic property of inductor in VLSI point of view. 

Now they moved towards Mobile Communication related questions. 

8. Explain CDMA. 

9. Working of CDMA and Multiplexing. 

10. How you will show all other signals in CDMA is noise.  And which type of noise it is? 

Then given a waveform and asked basic parameters used in it. 

But I hadn't understood the question well. So I was hesitating to answer but their hints made me comfortable so I could understand their approach towards the answer. 

Now they given me one capacitor-resister circuit and asked to draw the output if input is a square wave. 

I drawn very quickly hence they asked, "are you sure".

I said  " Yes sir. "

Now they asked about asynchronous circuit. 

Difference between synchronous and asynchronous counter. 

11. Draw given waveform using asynchronous counter. 

My interview lasted for about 2 hours.  I was not satisfied with the interview. I was preparing to go to home.  Within five minutes a person came with the medical slip. 

I was second candidate among 10 people who got medical slip that day. 

It was a great experience. 


Thursday, March 14, 2019

 Mtech Admission Interviews.

   Hello everyone ,
I just don't want to disclose my name so I'm posting it anonymously. Currently I'm working in BSNL as JTO. I qualified GATE 2017 (EC) with score 720 and all India rank of 850.
   With this score and rank I applied to old IITs like IITD,IITK,IITKGP. I would like to share my experience of interview taken for the Mtech admission at these old IITs.

Sourabh Patil (IIT Bombay Mtech communication systems) Mtech admission test and interview.

  • IIT Delhi ( Communication Systems)
Questions related time shifting, frequency shifting.
Significance of causality and asked to explain sampling theorem.
Decimation and Interpolation of sampling rate. After that they had given me a question related sampling rate. I remember the question.
Q. If sampling rate of CD is 44000and the device reads at the rate of 110kbps then the rate at which we have to apply interpolation and decimation?

I answered,"5 times interpolation followed by 2 times decimation."

Some questions related to modulation techniques like frequency and phase modulation using capacitor. Explain differentiation block.

Difference in equations and block diagrams of frequency and phase modulation.

Then they asked personal questions regarding family background and all.
Interview lasted for about 20 minutes.
I was selected.

  • IIT Kanpur (VLSI)

Questions related to transistors i.e. significance and use of transistors.

Q.How can we affect output resistance without internal changes?

My answer was , by applying external to Vcc or ground either at collector or emitter junction respectively.
Same question for input resistance also.

Now they asked questions on my Btech project.
After that asked ," Which is your favourite topic in mathematics? "
I said probability. Then they asked to explain conditional probability. A question was given to solve which was exactly similar to one of previous year GATE conitional probability question.
Then a question on double integration and GREENs theorem.
 I got selected here too.

Also I got direct admission in IITKGP.
For Mtech+Phd program.

In my opinion the main reason I got these many calls from IITs was in year 2017 so many vacancies in PSUs. Only BSNL had 2000 vacancies hence most of the candidates headed towards PSUs.

My suggestion to you guys just read and revise till the last day. For further queries you can mail me.


Wednesday, March 6, 2019

   IITB Mtech Admission Experience

For councelling Guidance and College preference guidance click here.

   I am Sourabh Patil.Currently doing my M.Tech in Communication Engineering (RA) from IIT Bombay. My GATE score was 692 in GATE2018 and my all India rank was 575. I was pretty sure that I will get a call for positio of RA from IIT Bomaby on the basis of previous years scores vs marks data.
There are mainly two ways to get admission for M.Tech in IIT Bombay. Those who have ranks in top 100 or so (probably) get direct admission as TA(Teaching Assistant) which is a 2 years M Tech course. And other one is called RA(Research Assistant) which is a 3 years M Tech course, for this you get call until 2000 or so rank as per my information.
The main fact that everyone should know that in the end both RA and TA has same demand in the so called job market, I would rather say RA ones has more time to gather knowledge than TA.
Once you get call for the position for RA you have to keep in mind you are gonna go under lots of filters so that they can get the right candidates. First of all when you get accomodation and all you get nice introduction from HOD of Electrical Department Prof B G Fernandes ( atleast at my time he conducted that ). He told us about the RA position what they are required to do and so on. At IIT Bombay in Electrical Department there are 5 specializations viz Communication, Electonic System Design, Microelectronics, Control and Computing, Power Electronics.
Under RA position there are two catagories one is IRA ( Institute RA ) other is PRA ( Project RA ). IRA s are responsible for the managing and conducting the labs in EE dept and PRAs are responsible for the working and managing the labs of certain predefined professors. So basically PRAs have to work under the professors for all the 3 years starting from 1st year.
   After giving all the briefing about the positions of RA s we were told that we have to write one exam which is mixed of all the subjects. This exam dont have any predefined structure. It has MCQs, descriptive questions, True or False,etc. But dont think that this exam will be too hard and so. Basically what they check is in which way you tackle the question. So you should be knowing basics quite well and should be able to present it in the answer sheet. Even if you dont get the end answer correct its fine they do consider parital marking.
After this exam ( Day 1) they display the result in the same night itself. From that they select around 200 or so candidates of 3 types. First which are called for IRA, second for PRA and third for both. They decide this by giving some weightage to the test and some to your written exam but mostly major part is dependent on the written. And on that, the questions that you have tackled in the paper they set cutoffs for IRA, PRA and both. The ones with highest score get call for both. For IRA and PRA  they see their requirement what they need. For example they gave some programming and networking questions in the exam so who scored well in those and fair marks in other sections gor call for IRA only as they need some IRA s in PC lab of EE dept.
Story doesnt end here. There are more tests you have to pass. As at the end of the day 1 you know for which  you have been called for. I was called for both IRA and PRA. And while filling the form I did give preference for IRA as they have more mobility in the curriculum.
Click here to Continue...


  IIT Bombay Mtech Admission Experience.

For councelling and college preference guidance click here.

   on Day 2, those who are selected for PRA, have to appear for the interview which is taken by IITB profs. For that we were given the projects that were running currently in EE Dept under different profs. So we requied to give 5 preferences according to our interest which is hard thing to do at that time, atleast for me as  I was not much aware in which project what kind of work we are gonna do. They do gave us abstacts of the project which we can read and give preferences accordingly.
   This process should be done by PRA and both selected candidates. This interviewing process takes place from 8 AM till 10-11 PM, as candidate undergo atleast 3 interviews. I will brief what do they ask after I go through all the selection procedure.
Now we will see what happend with IRA and both selected candidates. As my preference was for IRA I was more concerned about this one. For IRA they have tests according to different labs that they have in EE Dept. I remember on test was for Wadhwani Electronics Lab (WEL), Micro Lab and other was for PC lab of EE Dept and CC (Computer Center) IITB. So basically there is one test for your experience with electonics stuff, opamp, function generator, DSO, etc. Other test is to check your programming skills. My personal inclination was towards electronics stuff so I appeared for this test only.
Now I will brief about what kind of questions can you expect in the written test. Written test is mostly dependent on your GATE syllabus only. I would suggest that after GATE dont stop studying your subjects till you get admission in any good college. Do brush up your basics. Descriptive qustions seems hard to do but they are very basic, at my time they did ask how would you get a ramp function using opamp. For this they said you can assume some basic thing like that. So dont worry about the end answers just read the question well see what is expected and try to answer it in your language, just be sure that your answer is clear. For the PRA interview they asked me why did you choose this project as your first preference.
   This is very important that you should choose your preferences right. I told them as my Major project in B.Tech was agricultural related as this project is I have some knowledge about some things in this project .Then they asked about my project in more in depth. I answerd them as I could. They asked me whether I did all those thing in my project on my own or not, as they require the candidate to have some basic knowledge in that field. Actully in such interviw you have to drive them to your field of interest in any way possible. One of my friend was asked to derive some EMT s formula. So it merely depend on you how do you answer and in some cases your luck also. But do not lie infront of them remeber that they are one of the finest professors in our country who has seen thousands of students like us. If you dont know something they accept it and tell them the same.
   They do help you to get to the answer as they also know sometimes under pressure we forget many things so confidence and honesty is the key for PRA interview. Now lets jump to IRA test. I appeared for WEL test. This was 3 hour long test. They gave us all the components that are sufficient for the experiements. All the datasheets of the Ics and all. There was one problem having 3 subproblems. We were asked to perform some kind of experiment using DAC, some amplifiers and up counter I guess. In first question we were asked to draw the outpur that we are getting on DSO. Second question was that if it was same as expected output or not. And third was if there is some error in output then what that can be and how it is resolved.
    These all outputs you have to show to the TA or RA that are present beside the table and write your comments in the answer sheet. So many students are out of touch from the breadboard and other devices so they fail to get the output. I was out of touch too due to GATE prepartion and all but I got the answers as I used  to work in techincal event team in my B.Tech college. So folks its totally on yours skill set how you perform in this test. Some did well in programming test, as I was not good in that part I appeard for this one only.
 So in the end you will get mail if you are selected in one or two weeks. As I gave IRA as my preference I got selcted as IRA in WEL lab. Doing M.Tech in one of the best institue in India thoroughly changes you as a True Engineer. So do stive for the remaining days. Put your 100% and start from now. I hope that I gave some helpful inputs.All the best!!!!
Feel free to drop me mail for any queries


Friday, March 1, 2019

  Councelling Guidance.

©Sourabh Patil (Mtech IITB Communication Systems)

   It is very important to analyze which institute is best according to our GATE score and all India Rank. Otherwise it's waste of time and money.
   Key fields in which most candidates prefer to do Mtech are

For BARC exam preparation strategy, previous year question paper and personal interviews click here.

  • VLSI and Microelectronics.
  • Communication Systems.
  • Signal Processing.
  • Electronic system.
  • Control and computing.
  • RF and Microwave.
  • Photonic.
Preference to the institute and related fields is very very important. VLSI is having greater placements than other branches.
   Here's the table which can guide you about Rank or Score versus Institute and field.
       AIR/SCORE                  INSTITUTE/FIELD

  •  1 to 10                             any IIT/IISC VLSI
  •  25 to 30                           IITB VLSI
  •         <50                            IITM VLSI
  • Score>800                        interview call from                                             IITK or IITD (VLSI)
  • Score >950                        direct admission to                                             VLSI in IITD
  • AIR 300-500                     VLSI in top NITs
Top NITs ranking

  1. Tirchy
  2. Surathkal
  3. Warangal
  4. Calicat
This is for general category candidates.For OBC multiply it by 3.

Top rankings for IITs for VLSI.

  1. IISC
  2. IITB
  3. IITM
  4. IITD
  5. IITK
  6. NITT
  7. NITK
  9. IITG
  10. IITR
  11. NITW 
  12. NITC
Up to 750 rank you can get interview call letter from Texas instruments sponsored ms program in IITM.
Along with top IITs IITH, IITBBS, IITGN,IIT indore are also considerable.

Candidates having ranking between 2000 to 4000 can apply for BITS ,DTU,VTU .
 In IITB rank below 700 can get interview call for three years Mtech program.
Next comes communication systems engineering. All IITs and IISC have this stream.
AIR within 900 can put you in some top NITs for communication systems. If your rank is greater than 2500 then there are chances in spot rounds or go for the good Government colleges.
For PH till 10000 ranks also can get top IITs And NITs.

Next post will be Sourabh patil's marks rank and overall procedure(test/interview)
So, be updated.