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Qualcomm Interview Experience ( On-Campus Drive)

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Summary-

Round1: Test consists of 3 parts with 60 questions 90min. Marking scheme is +4 & -1.

Round2: Technical interview1 (30 min)

Round3: Technical interview2 (30 min)

Round4: HR (15 min)

Detailed-

Round1(Online Test) – There is a different qualifying cut for each section.

The test consist of 3 sections: All need to attempt in order, we are allowed to switch between questions of the same section but cannot switch between sections.

Section1: This section consists of basic aptitude questions like train, permutation & combination, probability, boat, work, etc.

Section2: This section contains the questions of code snippet(given a code what is the output)

Section3: This section contains basic Gate level questions mainly focused on DS, Algo, OS, CO, Networks.

Round2(Tech interview1) – It was a one to one interview. He asked me to write pen-paper codes, questions from C, OS, CO, etc.

Questions:

  1. Reverse a stack without using extra space.

  2. Construct a tree from pre-order and in-order traversal.

  3. Given an array which has numbers from 1 to n. There are 2 numbers replaced with 0. Find both numbers in O(n) time and O(1) space.

  4. What is priority inversion?

  5. Let us suppose there are multiple .c files and you want a function from a particular file can only be accessed in that c file only. (Ans- Use static keyword)

  6. What is Volatile keyword?

  7. A lot of questions from IPC, Cache, Paging.

Round3(Tech interview2) – It was also a one to one interview. I was the last person left for round 2 and it was around 9 pm, so everyone was drained.

Interviewer: Do you know how to construct a balanced tree.

Me: I only know that we can use a red-black tree or AVL tree, but I don’t know how they work.

Interviewer: Ok, then what do you know in Algorithms.

Me: Sorting, Graphs.

I want him to ask from graphs but he started with Linked list.

Questions:

  1. He asked all the possible questions from the linked list starting from construction of SLL to finding loops etc.

  2. Then he asked me questions from C programming, OS, CO.

Round4(HR) – This was more of one-sided. HR told me about the company asked me about locations preferences etc.

Both round 2 and 3 last up to around 30min. All the questions were basic level instead of 2-3 fancy terms that I ended up answering “I don’t know”.

Suggestions- They asked a lot of questions from oops, data structure, C programming, os, co, etc. One panel was also asking questions from ML like PCA, LDA, SVM, etc.

They also asked riddle-like(google them for details)-

  1. King and 100 poison bottle

  2. Bridge crossing (person with different time and one torch)

  3. Measure time from the rope, sand clock, etc.

Note: There were other questions that I don’t remember.


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TCS NQT 2018 (Recruitment Exam)

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I am from “Institute of Engineering and Management, Kolkata”.

Round 1: TCS conducted a National Qualifier Test (NQT) as the first round of recruitment process this year. There was no concept of Campus Recruitment had happened this year. They fixed two specific dates for this NQT exam that was 2nd September 2018 and 3rd September 2018. There were 3 slots for each day. Question sets were the same for all for the same slot but different for either slot.

There were four sections in that online exam with sectional cut offs. four sections are 1. English test 2. Aptitude test 3. Computer proficiency test 4. Coding test.

My slot timing was in the 3rd slot on 2nd. English section was pretty much normal basically fill in the blanks type. In the aptitude section, there are two subsections one is normal and another is advanced. Computer proficiency section was also the same type and many questions were asked from ds and c-programming code snippet. And the last section was the Coding section.

Results were declared via mail on 8th September and I was luckily qualified in the first round. From our college, almost 650 students appeared for that exam and 413 students are qualified for the F2F interview.

Round 2: On the very next day of the first round result declaration I got another mail from TCS for the Interview date and place which was conducted on TCS Gitanjali Park office, Kolkata.

I had my interview on 11th September from 12 p.m and onwards. I arrived at the TCS office at 11.30 a.m. After waiting for a long I got my call around 4.15 p.m.

Now here I am going to share my interview experience. I will write interviewer 1 as I1, interviewer 2 as I2 and myself as M :

.

.

M: May I come in?

I1: Yes.

M: Good afternoon sir, good afternoon ma’am.

<< without giving any reply back >>

I1: Mainak, tell me the basic difference between the Ipv4 and Ipv6?

<<I have not mentioned “networking” in my resume >>

M: …. somehow manage to answer very basic.

I1: Seems not so happy. ” you are giving an answer, like a class 5 child”. Then again asked a question from networking.

I1: what is your final semester subsects?

M: After a big pause… Sorry, sir! I don’t know as currently, I am in 7th sem.

I1: So what is your 7th sem subjects and 6th sem subjects?

M: Ans with confidence.

<<As I was not prepared for this kind of questions. I lose my confidence took permission for having some water in between the interview process>>

I1: Final year project related questions

M: Ans with confidence.

I1: DBMS related questions

M: Answer

I1: Questions related to Extracurricular activities and some questions related to marketing.

M: Manage to answer every question.

<In between this I2 was only observing me and my answers…. Not a single question was asked by her>

After the Interview, I was asked to wait outside. Again after waiting a long I was asked to leave for the day.

.

.

A few days later, results out and as expected my name was not there in the list.

From the 413 qualified students, only 192 students got the offer letter.

I can say Luck really matters a lot in case of every interview. If you get a good panel you will be hired easily.

Best Of Luck!!!!!!!!!!!!!

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