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Interview Process   |   Interview Puzzles / Aptitude
Organization : Twitter
Position : Software Engineer

Twitter Interview Process

I applied at Twitter for the post of Software Engineer through an online application. I was interviewed at Twitter. There were a lot many rounds in the hiring process and I will try my best to explain each of those round below.

Round 1 - Telephonic Screening
I got a call from the recruiter after I applied. She covered all the resume based questions at the basic level and a brief introduction also took place. She told me more about the company and their requirements. Then there were some technical questions that covered the basics well.

Round 2 - Telephonic Interview
After the call from recruiter, I was called by the hiring manager. This was a longer interview as many questions were asked. The interviewer covered all the technical aspects a bit more in detail than the previous round. I was able to answer majority of the questions and the hiring manager was clearly impressed by me.

Round 3 - Second Telephonic Interview
I was called by a senior engineer who took the whole level to somewhere else. The questions were pretty difficult and if I would not have studied well, I would have been rejected right away. Luckily I spent much time in preparing and was able to perform decent (not great).
* After the telephonic interviews, I was called again by the recruiter who called me in for the onsite interview.

Round 4 - On-Site Interviews
Since there were about seven to eight interviews that took place on-site, it would not be feasible for me to write about every single one of them separately. So I would try to cover for them in general. All the interviews will last on an average for about half an hour or more. You will be flooded with all sort of technical questions in these interviews. Some of the questions that were asked:
Q1. Create an application which displays a word ladder between two strings.
Q2. If there are P lanes and Q cars in each lane and Cars[i][j] = (position of car, length of car), and if a frog desires to cross the road in one straight jump (vertically down), not bump into any car, write a function to conclude if he will be able to do it. You are given a frozen state of the road.
Q3. Reverse the order of words of a sentence in place.
Q4. Generate a random sentence using markov chains.

Other than technical questions, there will be a lot of cultural fit type questions. Please don't fake your responses or they will know about it. Also, many human resources based questions were asked. Some of the questions:
Q1. Why do you want to work for twitter?
Q2. What would you like to change about our product 'P'?
Q3. What type of manager would you like to work for?
Q4. How will you work under a team?

How to crack Twitter Interview

The overall hiring process at Twitter was really extremely comfortable and smooth. There were no glitches of any sort. The recruiter was so polite and placed enough information in me about the company. I can say the same for the hiring manager. Very polite and very efficient. Also, the scheduling is amazing and if you have that sort of time, you can finish off the entire process within a week.

There were many technical questions that were asked. To give you a faint idea, I have mentioned the kind of questions that were asked from me. But I would say that you will have to prepare hard if you want to be a part of this fabulous company. This is because the questions come from any direction and you must be prepared for that. I can't give specific pointers about anything as you might feel cheated if those pointers does not come true for you. There are about eight on-site interviews and thus you should prepare for the worst.

After your interviews, the recruiter will wait for the feedback of every interviewer and only then, you will be contacted and informed if you are hired or not. The package is negotiable and it all depends on what impression you generated in your interviews. So pull up your socks and prepare hard. All the best for preparations and the interviews.

Thanks Anmol for sharing the details of your interview.
Send more details and your personal experiences info@gpuzzles.com
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IAS Interview Problem

I need to divide numbers from 1 to 9 into two group such that sum of numbers in one group is equal to the sum of other group.
Note : 6 cannot be flipped over to make it 9.

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Interview Marble Logic Puzzle

You are given a set of scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other.
The 12 marbles appear to be identical. In fact, 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more.

Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light.

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Measuring Time Logic Puzzle

You are given with two ropes with variable width. However if we start burning both the ropes, they will burn at exactly same time i.e. an hour. The ropes are non-homogeneous in nature. You are asked to measure 45 minutes by using these two ropes.

How can you do it?

Please note that you can’t break the rope in half as it is being clearly stated that the ropes are non-homogeneous in nature.

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Tricky Logic Question

A claustrophobic person boards a train that is just about to enter a tunnel.

Which place will be the best for him to sit?

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Tricky Iq Question

In a jar, there are some orange candies and some strawberry candies. You pick up two candies at a time randomly. If the two candies are of same flavor, you throw them away and put a strawberry candy inside. If they are of opposite flavors, you throw them away and put an orange candy inside.

In such manner, you will be reducing the candies in the jar one at a time and will eventually be left with only one candy in the jar.

If you are told about the respective number of orange and strawberry candies at the outset, will it be feasible for you to predict the flavor of the final remaining candy ?

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Hard Logic Brain Teaser

There are 100 doors. 100 strangers have been gathered in the adjacent room. The first one goes and opens every door. The second one goes and shuts down all the even numbered doors – second, fourth, sixth... and so on. The third one goes and reverses the current position of every third door (third, sixth, ninth… and so on.) i.e. if the door is open, he shuts it and if the door is shut, he switches opens it. All the 100 strangers progresses in the similar fashion.

After the last person has done what he wanted, which doors will be left open and which ones will be shut at the end?

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Famous 13 Cave Logic Problem

A thief was running from the police after the biggest theft the town saw. He took his guard in one of the thirteen caves arranged in a circle. Each day, the thief moves either to the adjacent cave or stay in the same cave. Two cops goes there daily and have enough time to enter any two of the caves out of them.

How will the cop make sure to catch the thief in minimum number of days and what are the minimum number of days?

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Pirates Probability Brain Teaser

You are stuck with the pirates who might even kill you on board. They give you a chance to survive. There are hundred black rocks and hundred red rocks. There are two empty sacks which are labelled as heads and tails respectively. You have to divide the rocks in two bags as per your wish. Then a fair coin will be flipped. If its heads, you will have to pick a rock on random from the sack labelled heads and if its tails, you will pick up from the tails sack. If you pick up a black rock, you will be freed and if you pick up a red rock, you will be killed.

How will you distribute the rocks so that your chances of survival are the best?

By Admin
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Be Detective And Find The Thief Puzzle

You need to be a detective and need to find the thief in the puzzle below?

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Hard Ten Boxes Interview Puzzle

You have ten boxes and an electronic weighing machine. In those ten boxes, you have chocolates. Each chocolate weigh 20 grams. But in one box the chocolates are defective and each weigh 19 grams exactly.

Now you can weigh in the electronic weighing machine but you can use that machine just once. How will you find out which box has the defected chocolates.

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