Loyalty Juggernaut Backend Developer Interview Questions and Answers

Topics to prepare for Paytm Backend Developer interview:

• DSA
• Core java
• Design Patterns
• Spring Boot

Interview preparation tips for other job seekers - DSA , Design Patters , Core Java Concepts , Springboot

Round: Test
Experience: I was really frustrated because of the rejection from previous companies and in the same time deeply determined to convert this one as this was the last company offering the profile of Business Analyst. I can say this based on my experience that converting a company is solely a matter of your preparation and self-confidence but a tad bit of luck is also a necessity.
Tips: I have been particularly lucky and so have been all the serious CAT aspirants in the online tests. It is not that you need to enroll in TIME with the word go, but rather analyzing your calculation speed, your communication and interpretation skills can do you wonders.
Duration: 60 minutes
Total Questions: 50

Round: Group Discussion
Experience: Obviously the topic was on Indo-Sino relations, which I was quite aware of. As this a topic on foreign policy, very few people were actually aware of this topic, so I had an obvious advantage. This is the most trite advice but still I will say this "Read, Read,Read".
Tips: There are always some people who are well informed of the given topic and some who are not and it is always helpful to be in the first group in GDs. I like to be up to date on current affairs and at the same time reading novels from the likes of Shashi Tharoor and my personal favorite Khaled Hosseini prepared me for group discussions. It is always helpful to proceed by looking @ the problem from different perspectives like legal, social, academic and technical or else if you are particularly unlucky you might face an abstract topic, where you might need to use your imagination, like one my friend faced "Yellow shoes with pink laces". Even now I cannot aptly describe this topic.

Skills: Communication Skills, Calculations, Verbal, Knowledge on current affairs
College Name: NIT BHOPAL
Motivation: My only motivation was the post the company was offering. As it will be helpful for future plans of working in an Investment Bank or pursuing an MBA.
Funny Moments: In the Interview round, they asked me why do you want join this company. In reply I started with the word 'Firstly' and said because of its profile and did not not think of the second reason and they asked this very thing. I took my moment and realized honesty is best possible way now and replied that you are last non-core company visiting this campus and if you guys reject me I might leave this campus unplaced (because of my weak technical background). On hearing this they started laughing and at that very moment I knew I might not after all.

Round: HR Interview
Experience: So, for the above question, I answered that I was looking for a change and better role. But, HR asked that am I not looking for a good hike in the salary (she thought I'm changing the job to get a attractive salary)... But, I repeated my answer....

Round: HR Interview
Experience: I explained completely what all managed and balanced the responsibilities in my previous company...

Round: Other Interview
Experience: He also checked my communication skills and asked few questions related to the company to check how much I'm aware of the role for which I was looking for...

Round: Other Interview
Experience: As we had to handle tasks through email comunication, the question was asked... I chose topic of poverty in India and wrote few lines of it...

Round: Resume Shortlist
Experience: They selected 10 students from our college from CS and IT .They are looking for guys with extra projects done during college .App development will be a bonus ,contribution to open source and competitive programming will help for shortlisting.
Some of my friends had research papers published and they too got selected.

Round: Test
Experience: Have to write code snippet for 4 questions in 45 minutes
1.Difference between hour hand and minute hand
2.longest palindromic sub string.
3.Product Array puzzle
4.Some question related to matrix

Tips: All question were from geeksforgeeks
So practice it well ..u will make through it

Round: Test
Experience: Long Discussion on projects
They will scan each and every line of your Resume ,so dont write bullshits..
I wrote about interest in AI and got screwed..Discussion on college projects and final year project.
Then asked me to design a snake and ladder game OOPS concepts
Told me to find sum of all elements of sub matrix..(hint pre-processing the matrix)
Asked me about sessions and cookies
Gave a query to write on database indexing (dont remember exactly)
Asked me the code of the difference between hour hand and minute hand and extended it wid the second hand
Asked me as how to implement a dictionary
asked about TRIES ,CODE SNIPPET ON THE SHARED DOCS
One of my friend was asked to implement (set) of STL
Tips: The interviewer was cool guy..helped me a lot always made me comfortable.Interact with them as much as possible

Round: Test
Experience: Wid the CTO of the company .
Started wid the projects again .ACID properties,Database transactions,Concurrency Control
Optimization in database.
Then he asked me to code a function
Given a hash function applied on letters of English words ,un-hash it.Took me 45 minutes to reach the solution ,he helped me a lot.
Asked me to write the code for diameter of a binary tree
Asked me write the code for Boolean Matrix
One of my friend was asked to a question in which there was a bug in a m*n matrix and we have to find the bug(hint dfs or bfs)
Tips: keep calm ,,just keep talking ad he will help u a lot...

Round: HR
Experience: This was the toughest round for me...I had cleared all the rounds but they rejected me in the HR round ,,,dont know where I screwed..Learn every thing of Zomato..
They offered me an internship and thereafter they would look to give a PPO ...!!!lets see what happens

Skills: Coding Skills And Knowledge On Data Structures
Duration: 3
College Name: NIT Srinagar

General Tips: I applied through a recruiter. Then I got a call from Zomato HR. It was for LAMP developer profile. She asked me about my profile and also shared some expectations from the role. She asked me to come for F2F rounds to take the process further
Skills: Web development, JSON, Algorithm
College Name: na
Motivation: Overall process was not very tough. But they have start up culture. People work their for 11-12 hours a day. Sometimes on Saturday as well. So people who are geeks or have nothing in life to do except their job can go and join

Round: Test
Experience: PAPER DURATION: 3 hours
NO. OF QUESTIONS: 2 (20 marks each)
MAXIMUM MARKS: 20*2 = 40 marksQUESTION 1:
JSON Prettier:-Write a program which takes JSON as input and gives prettified JSONYou need to read JSON from STDIN. Input gives one line of uglified JSON.Output should be formatted JSON. Check the standard output link.Use 2 white spaces (not‘\t’) for one indentation.SAMPLE INPUT:{“group” : {list : [1,2,3]}, “list” : [“a”,”b”,”c”]}SAMPLE OUTPUT:{“group” : {List : [1,2,3]},“list” : [“a”,”b”,”c”]}EXPLANATION: Input will be uglifiedjson in one line and output will be prettified format of that. QUESTION 2:XML parse plus series computationEvaluate an expression given in XML format. Keys will be Expr- contains the entire expression. Elem – contains the digit, sum, Prod- contains two or more keys whose evaluation needs to be summed or multiplied respectively. Sub will contain 2 keys or more, where the second key onwards will have to be subtracted from the first one. Div- will contain 2 keys in which first key will need to be divided by second. SAMPLE INPUT:4673 SAMPLE OUTPUT:
20EXPLANATION:Input will be xml file through standard input. End of xml file marked by .
Duration: 180 minutes
Total Questions: 2

College Name: NA

Round: Test
Experience: Questions are asked on basic Programming(sorting ,trees) , networking and some aptitude
Tips: Spending some time on networking for preparation can help to clear the test ( as they are mostly like knowledge checking Questions)
Duration: 45 minutes
Total Questions: 30

Round: Test
Experience: Only 2 Questions time will be sufficient .i was asked to write the pseudo code
1) on Dynamic programming
2) Graphs
Tips: explain your code by writing in your own language at the end of your pseudo code
Duration: 60 minutes
Total Questions: 2

Skills:
College Name: IIT Kanpur