One97 Interview Questions – Set 1

Company: One97 Communication(Paytm)
Profile: Software Developer Java

Interview process: Written paper(technical) + 3 Tech interview

Technical Interview Questions:
Q1. Wap to get the height of a BST?
Q2. Implement merge-sort?
Q3. what are threads and multi-threads?
Q4. Give two ints, return index(0 based) of an int if it is present in another int. For eg. int a = 34, int b = 12345. Function must return 2 since 34 starts in 12345 at index 2.
Q5. Implement a pattern matching dictionary using Trie?
Q6. Deadlock and synchronization?
Q7. Given an array of integers and an integer k. Returns the pairs that subtract result in k. Example: 3,6,10,13. , k=3
Q8. You have a 5 quart jug and 3 quart jug, and an unlimited supply of water (but no mea-
suring cups). How would you come up with exactly four quarts of water?
Q9. You are trying to cook an egg for exactly 15 minutes, but instead of a timer, you are given two
ropes which burn for exactly 1 hour each. The ropes, however, are of uneven densities – eg,
half the rope length-wise might take only 2 minutes to burn?

Best of luck. :)

I would like to thanks CFC for maintaining such a website and explaining programming in such a nice way.

Thanks Rajkamal for sharing your experience.

14 Thoughts on “One97 Interview Questions – Set 1

  1. Hi Rajkamal
    Can you pls tell me something about first round comprises of apti and tech part..

    • hey farhan,
      for one97 written test, you shold hv good knldge of java ( most of the questions from java), c and c++ (less questions).
      and for apti , genegal questions of rs agarwal ,good reasoning questions (van diagram related) and for english synonyms ,antonyms,and some regarding find error part of given sentence.

  2. Ranveer Singh on February 15, 2014 at 1:22 am said:

    I have a face to face interview with One97 Technical and HR team. On which subjects/topics should i concentrate more.

    • Hey Ranveer,
      Please guide me(ASAP) to face their online test(technical+apti). What type of questions are to be expected in technical as well as apti section?
      Job profile is : software developer(product development)

      • Ranveer Singh on February 26, 2014 at 9:22 pm said:

        In Aptitude: 30 Questions, basic from Time,Speed & Distance,Percentage,Ratio and Proportion, Time and Work, Permutation & Combination, Some English passage question,Synonym, Antonyms.

        In Technical: 30 Questions, basic output questions on C,C++,Core Java, More questions on Java.

        In Face2Face interview: They ask puzzles, question on data structures, more focus on C,C++, output problems
        like output of

    • Satyabrata Swain on February 21, 2014 at 3:48 pm said:

      Hi Ranveer
      Can you tell me what were the question coming on Screening Video Conferencing Interview. I will face the interview on next week.

    • manpreet singh on February 23, 2014 at 4:45 pm said:

      hey ranveer ,
      can u tell me the questions asked in interview. pls rply asap.

  3. @Ranveer Singh,
    HELP ASAP, could you please suggest me about the kind of questions to be expected in their online (technical+aptitude )test? Job profile is : Software Developer(product development)

    • Satyabrata Swain on February 22, 2014 at 4:19 pm said:

      Hey Jai
      It was a test of 60 object type question (30 technical + 30 Reasoning, English, Apti). On technical questions are from Java and C. C question are from ”Test Your C Skill” book. Most of question are from Java, From Reasoning most are from English grammar and passage.

  4. piyush gupta on March 9, 2014 at 7:23 pm said:

    i will be having the google hangout interview for the post of software developer in next week. Please tell me on which areas to focus upon.

  5. Sir/Mam,

    Can u please help me out with question papers for paytm drive for profile:Process Associate.
    Or plz tel me the process how it will go on.
    please help me asap.

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