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

Zillow Interview Process

I applied at Zillow for the post of Software Engineer through an employee referral. My interview process at Zillow had four rounds - two telephonic interviews, one coding test and one on site interview. The interview process took more than a month.

Round 1 - Telephonic Screening
I received a call from a technical recruiter after I applied for the post. This screening lasted for only fifteen minutes and it was all about the basic things. He asked me about me and my strong areas. He asked me why I was interested in joining Zillow and all. In my opinion, it was just to ensure the authenticity of the candidate.

Round 2 - Coding Test
After the telephonic call, I received an email from them about a coding test. This test was conducted through email and I had two hours to complete the test. I won't say that the test was easy as it depends from person to person and the amount of efforts one has put in preparation. Some of the questions given to me in this coding test:
Q1. WAP to convert string to Long.
Q2. WAP to insert a node in a trinary tree.

Round 3 - Telephonic Interview
After I successfully completed my coding test, I was scheduled for the telephonic interview with a developer. The interview took place after about a week. There were many questions asked and the interview lasted for about 45 minutes. Some of the topics on which questions were asked:
Q1. Java garbage collector algorithm.
Q2. Difference between process and thread.
Q3. Abstract class vs. interfaces.
Q4. Hash vs. bst.
Q5. WAP to find the first unique character in a string.
Other than all these, there were some behavior based questions as well. I was also asked why I wanted to join Zillow and other questions like these.

Round 4 - On-Site Interview
Finally, I was called for an on-site interview. This was a loop interview which lasted for about four hours. The interviewers kept changing and returning. Many questions were asked and it all began with questions on the basic concepts but soon lifted up for more complex questions and coding problems. I got stuck with an SQL design question but I was helped by the interviewer and was able to give a solution for the problem then.
Q1. You are given a file which contains all possible numbers on a 32-bit architecture. Now, 4 numbers are missing from that file. Find the 4 missing numbers.

How to crack (get into) Zillow Interview

The interview process at Zillow is highly professional. Though about a month was burned for that, it was totally worth it. Except the first telephonic screening by the recruiter, none of the round was about just completing formality. Thus, you need to prepare really hard if you dream of working in the company.

The coding test is moderately difficult but that is the first step in the ladder and thus you must at any cost prepare really well for that. I believe that you need not be perfect in the personal interviews but you must be perfect with coding tests. That is your base and that will generate the impression on your interviewers.

After that, you will face a telephonic interview. That interview is a long one and there will be a lot of questions asking you to differentiate between this and that. So be clear with the terms. You can Google such questions and prepare. A few coding problems will also be asked. Don't panic if you don't know it but instead try to find a way and if you are on a right track, you will be helped by the interviewer for sure.

The technical on-site interview is really long and that is where, more than anything, you will need your patience and your confidence level. There will be 4-5 interviewers in total however you might only begin with 1 or two. Mostly, the questions will be basic in nature but then you will be given a few coding problems again. Use the same approach again.

The people at Zillow are highly professional and you will love being interviewed. If you get an offer, accept it even if you are not allowed to negotiate. The company is really good with such a talented employees. All the best for your interviews.

Thanks Anmol for sharing the details of your interview.
Send more details and your personal experiences info@gpuzzles.com
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Logic Fruits Riddle

There is a box full of fruits,
all but two are grapes,
all but two are apples,
and all but two are oranges.

How many fruits are in the box ?

By Admin
  • Views : 60k+
  • Sol Viewed : 20k+

The Elf Logical Puzzle

A wicked sorcerer felt enmity towards elf and thus he chooses four among the rest of the elf's and concealed them. The elves are concealed in the ground in a manner that apart from their head the rest of their body was underneath the ground. The elf's are unable to move their body and can only see in that direction that they are facing. All the elf's are concealed underground in such a way that they form a straight line and among those four elf's that are concealed underground one of the elf is detached form the other three elf's via wall. The entire elf's are in the same direction. The elf that is the furthest can only see the heads of its friends in front and a wall. The elf that is second last can only see one head of his friend and a wall. The second elf can only view the wall. The elf can see nothing.
The sorcerer understands the situation and tells the elf's that he has placed hats over their heads. Among the hats places two hat are blue and the other two are red. Among all the four elfs one of the elf has to guess that which colour hat is he wearing. If the elf answers correctly then he shall be set free or else he will have to dig beneath the ground till the very last.

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Tricky Math Race Riddle

Rooney, Hernandez, and Robin race each other in a 100 meters race. All of them run at a constant speed throughout the race.

Rooney beats Hernandez by 20 meters.
Hernandez beats Robin by 20 meters.

How many meters does Rooney beat Robin by ?

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  • Sol Viewed : 20k+

Water Measurement Riddle

A barman is having a 12 liters jug full of beer. He needs to divide or split that beer into two equal parts. All he has is two empty jugs of capacity 8 liters and 5 liters.

How will he do it using them?

  • Views : 40k+
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3 Gallon Brain Teaser

You have been given three jars of 3 liters, 5 liters and 8 liters capacity out of which the 8 liters jar is filled completely with water. Now you have to use these three jars to divide the water into two parts of 4 liters each.

How can you do it making the least amount of transfers?

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Crossing The River In Minimum Time Puzzle

Four people need to cross a dark river at night.

* They have only one torch and the river is too risky to cross without the torch.
* If all people cross simultaneously then torch light wont be sufficient.
* Speed of each person of crossing the river is different.cross time for each person is 1 min, 2 minutes, 7 minutes and 10 minutes.

What is the shortest time needed for all four of them to cross the river ?

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Hard Logic Puzzle

A great meeting is held by a great logician where all the other logicians are called upon. The master logician takes them in a room and makes them sit in circle. A hat is placed on each of their heads. Now all of them can see the color of hats others are wearing but can’t see his own. They are told that there different colors of hats.

The master logician explains that a bell will be rung at regular intervals and the moment when a logician knows the color of his hat, he will leave on the next bell. If anyone leaves at the wrong bell, he will be disqualified and sent home.

All of them are assured of one thing that the puzzle will not be impossible for anyone of them. How will they manage the situation?

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Tough River Crossing Riddle

This one is a bit of tricky river crossing puzzle than you might have solved till now. We have a whole family out on a picnic on one side of the river. The family includes Mother and Father, two sons, two daughters, a maid and a dog. The bridge broke down and all they have is a boat that can take them towards the other side of the river. But there is a condition with the boat. It can hold just two persons at one time (count the dog as one person).

No it does not limit to that and there are other complications. The dog can’t be left without the maid or it will bite the family members. The father can’t be left with daughters without the mother and in the same manner, the mother can’t be left alone with the sons without the father. Also an adult is needed to drive the boat and it can’t drive by itself.

How will all of them reach the other side of the river?

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Hard Logic Statement Riddle

There are a hundred statements.
1st person says: At least one of the statements is incorrect.
2nd person says: At least two of the statements is incorrect.
3rd person says: At least three of the statements are incorrect.
4th person says: At least four of the statements are incorrect.
100th person says: At least a hundred of the statements are incorrect.

Now analyze all the statements and find out how many of them are incorrect and how many are true?

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  • Sol Viewed : 30k+

Popular Interview Problem

I have two rectangular bars.

They have property such that when you light the fire from one end , it will take exactly 60 seconds to get completely burn.
However they do not burn at consistent speed (i.e it might be possible that 40 percent burn in 55 seconds and next 60 percent can burn in 10 seconds).

Problem is : How do you measure 45 seconds ?

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