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Qubole Interview Questions and Answers

Updated 19 Nov 2020

Qubole Interview Experiences

2 interviews found

I applied via Company Website and was interviewed before Nov 2019. There were 3 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. Irrelevant now. Qubole was fantastic to work but it is recently acquired by Idera. Just go to glassdoor and see the reviews of idera. I have nothing else to say.

Interview Preparation Tips

Interview preparation tips for other job seekers - Do not join this company now at any cost.
After acquisition, things are going downhill and one should not be surprised to see Qubole as a product vanishing from the market in next few months.

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Interview Questions & Answers

user image Anonymous

posted on 21 May 2015

Interview Preparation Tips

Round: Test
Experience: Input:
Was csv files of fb users data.Questions for above Input:
1. Parse the data and build a graph.
2. Check if two users are friends.
3. Check if two users have a friend in common.
4. Find total mutual friends for a pair of users.
5. Find potential friends based on mutual friend count.
6. How will you do this for large datasets ?OO code was required which had a good design and was well commented.
Total Questions: 6

College Name: NA

Jobs at Qubole

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I applied via Referral

Interview Questionnaire 

6 Questions

  • Q1. Your contribution in your projects?
  • Ans. 

    I have contributed to my projects by developing and implementing new features, fixing bugs, and improving overall performance.

    • Developed and implemented new features

    • Fixed bugs and issues

    • Improved overall performance

    • Collaborated with team members to ensure project success

    • Provided technical support and troubleshooting assistance

  • Answered by AI
  • Q2. How you resolve problems within team?
  • Ans. 

    I encourage open communication and collaboration to identify and solve problems within the team.

    • Encourage open communication and active listening

    • Identify the root cause of the problem

    • Brainstorm solutions as a team

    • Assign tasks and follow up on progress

    • Evaluate the effectiveness of the solution

    • Provide constructive feedback

    • Celebrate successes and learn from failures

  • Answered by AI
  • Q3. What are your expectations from the company?
  • Ans. 

    I expect a company that values innovation, growth opportunities, and work-life balance.

    • Opportunities for professional development and growth

    • A culture that encourages innovation and creativity

    • A healthy work-life balance

    • Clear communication and transparency

    • Competitive compensation and benefits

    • Collaborative and supportive team environment

  • Answered by AI
  • Q4. Do you have any plans of higher studies?
  • Ans. 

    Yes, I am planning to pursue a Master's degree in Computer Science.

    • I am interested in specializing in Artificial Intelligence.

    • I have already researched and shortlisted a few universities.

    • I plan to apply for the next academic year.

    • I believe higher studies will help me gain a deeper understanding of the field and advance my career.

  • Answered by AI
  • Q5. How flexible you are in professional life?
  • Ans. 

    I am very flexible in my professional life and can adapt to changing situations easily.

    • I am open to learning new technologies and skills

    • I can work in different environments and with different teams

    • I am willing to take on new challenges and responsibilities

    • I can adjust my work schedule to meet project deadlines

    • I am comfortable with remote work and flexible work arrangements

  • Answered by AI
  • Q6. Tell me about your self?
  • Ans. 

    I am a software engineer with experience in developing web applications and a passion for problem-solving.

    • Experienced in developing web applications using languages such as Java, Python, and JavaScript

    • Proficient in using frameworks such as Spring, Django, and React

    • Strong problem-solving skills and ability to work in a team environment

    • Passionate about learning new technologies and keeping up with industry trends

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: 55 questions in 60 minutes of which 45 were technical and 10 were aptitude questions and there was no negative marking. The technical questions covered RDBMS, UNIX, C, C++, Java, Operating systems, Data structures and Algorithms. The questions were simple and the basics of each of the mentioned subjects were mainly asked.
Duration: 60 minutes
Total Questions: 55

Round: Test
Experience: Again mainly questions on the subjects covered in round 1 but bit more in deep questions required short but detailed answers.
Tips: Learn to write pretty good Unix Scripts and Know the Basics of Operating System & OOP
Duration: 40 minutes
Total Questions: 10

Round: Technical Interview
Experience: Questions mainly on UNIX & RDBMS. Interviewer will ask you to write UNIX scripts and SQL/JAVA-SQL queries/programs for some use cases.
Tips: Know how JOINS, INTERSECTION, UNION & Aggregation works in SQL.

Round: Technical Interview
Experience: Questions on Programming, Data Structure and algorithms.
You will be asked to write pseudo-program for some of the use cases.
Tips: Choose your programming language cleverly. ;)

Round: Other Interview
Experience: Round 5 is an interview with Technical Manager.
Questions are asked based on the content of your resume like projects, hobbies and traits.
Few puzzle questions are asked which usually can be answered with logical analysis.
Tips: Be prepared for questions on the answer you give for the previous question(s).

Round: HR Interview
Experience: Again question will be asked on the basis of your resume. Questions may also asked on your previous interview experience if you have any.
Tips: Clear your doubts before leaving the room.

General Tips: Be confident, be straight forward, do not try to bluff with answers and try to be creative with answers. Prepare well both technical and aptitude.
Skills: Algorithms And Data Structures, Operating Systems, Unix, SQL, Java Programming, Object-Oriented Programming (OOP), C Programming
College Name: JSS Mahavidyapeetha Sri Jayachamarajendra College Of Engineering, Mysore
Motivation: Work Environment of Informatica.

Interview Preparation Tips

Round: Test
Experience: Round 1: Online objective test.
There were questions from Operating Systems, C, Algorithms, Data Structures.

Round 2: Online and subjective (choose language C++ or JAVA). This round had 15 questions.
Data structures, C++ questions, Fibonacci optimisation, algorithms (DFS/BFS).

Round: Technical Interview
Experience: In the first round of interview they asked me questions about :1) My project (asked no. of classes and mention their responsibilities).
2) ACID properties of database and indexing in a database.

There were also questions related to OOPS concepts including polymorphism, composition, aggregation, inheritance, Abstract classes, interface; difference between usage of abstract class and interface, can abstract class be instantiated, how to access child class methods having reference of base class.
There was another question on run time and compile time binding and under which category do we classify method overloading and also questions on code for deleting the duplicate nodes in a sorted link list and printing root to leaf paths in a binary search tree.

Round: Technical Interview
Experience: This was the second round of the interview. They asked me the following questions,There is a tree (not binary) and all non-leaf nodes are RED in colour. Some leaf nodes are white in colour. If a node has all white coloured children then its colour can be changed into white. So we have to convert maximum number of nodes into white colour – write program for the same.
Code for checking whether a given binary tree balanced or not.
What are virtual functions, what is their role?
Questions related to virtual functions.

You are given the details of each transaction of each item i.e. item_name, quantity, price. So at the end of the day, you want top 50 items that have been sold. There are two cases:
In the first case you have fixed number of items.
In the second case very large number of items – so you need to decide what data structure to be used for this.

Round: Technical Interview
Experience: In the third round of the interview they asked questions like :
1) Types of tree traversals (breadth first and depth first (pre, post, in)
2) Determining width of binary tree i.e. using breadth wise traversal
3) Why files are preferred over databases?

College Name: IIT KANPUR

Interview Questionnaire 

11 Questions

  • Q1. Asked about my project? Also asked me questions about ACID properties of database and indexing in a database
  • Q2. There were also questions related to OOPS concepts including polymorphism, composition, aggregation, inheritance, Abstract classes, interface; difference between usage of abstract class and interface, can ...
  • Q3. There was another question on run time and compile time binding and under which category do we classify method overloading
  • Q4. Code for deleting the duplicate nodes in a sorted link list?
  • Ans. 

    Code to delete duplicate nodes in a sorted linked list

    • Traverse the linked list and compare adjacent nodes

    • If nodes are equal, delete one of them

    • Repeat until all duplicates are removed

  • Answered by AI
  • Q5. Printing root to leaf paths in a binary search tree
  • Ans. 

    Printing all root to leaf paths in a binary search tree

    • Traverse the tree recursively and keep track of the current path

    • When a leaf node is reached, add the current path to the list of paths

    • Print all the paths in the list

    • Use an array of strings to store the paths

  • Answered by AI
  • Q6. Given an Array of Integers, Find two elements in the array whose sum is closest to zero?
  • Ans. 

    Find two integers in an array whose sum is closest to zero.

    • Sort the array in ascending order.

    • Initialize two pointers at the beginning and end of the array.

    • Move the pointers towards each other until the sum is closest to zero.

  • Answered by AI
  • Q7. What are virtual functions, what is their role? Questions related to virtual functions?
  • Q8. You are given the details of each transaction of each item i.e. item_name, quantity, price. So at the end of the day, you want top 50 items that have been sold. There are two cases: - In the first case you...
  • Q9. How do you quickly count the number of set bits in a 32-bit integer in linear time (with respect to the number of set bits)?
  • Ans. 

    Count set bits in a 32-bit integer in linear time

    • Use bit manipulation to count set bits

    • Divide the integer into 16-bit chunks and count set bits in each chunk

    • Use lookup tables to count set bits in each 8-bit chunk

    • Use parallel processing to count set bits in multiple integers simultaneously

  • Answered by AI
  • Q10. Determining width of binary tree i.e. using breadth wise traversal
  • Ans. 

    To determine the width of a binary tree using breadth-wise traversal, we need to count the number of nodes at each level.

    • Perform a breadth-first traversal of the binary tree

    • Count the number of nodes at each level

    • Keep track of the maximum number of nodes seen at any level

    • Return the maximum number of nodes seen

  • Answered by AI
  • Q11. Why files are preferred over databases?
  • Ans. 

    Files are preferred over databases for certain types of data and applications.

    • Files are faster for small amounts of data.

    • Files are easier to manage and backup.

    • Files are more flexible for certain types of data, such as images or videos.

    • Databases are better for complex data relationships and queries.

    • Databases are more secure and scalable for large amounts of data.

    • The choice between files and databases depends on the spec

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: There were questions from Operating Systems, C, Algorithms, Data Structures

Round: Test
Experience: This round had 15 questions.Data structures, C++ questions, algorithms (DFS/BFS)

Skills: java, OOP, Algorithm
College Name: IIT KANPUR

Skills evaluated in this interview

I appeared for an interview before May 2016.

Interview Questionnaire 

3 Questions

  • Q1. Tell me about your mini project
  • Ans. 

    Developed a web application for tracking personal expenses

    • Used HTML, CSS, and JavaScript for front-end development

    • Implemented Node.js and MongoDB for back-end functionality

    • Included features for adding, categorizing, and analyzing expenses

  • Answered by AI
  • Q2. Tell me about your team work other than project.
  • Ans. 

    I actively participate in team building activities and collaborate with colleagues on various initiatives outside of work projects.

    • Organizing team lunches or outings to build camaraderie

    • Participating in charity events or volunteer work as a team

    • Collaborating on internal initiatives such as diversity and inclusion programs

    • Attending industry conferences or workshops together

  • Answered by AI
  • Q3. How will you convince your client if you are not able deliver the project on time.
  • Ans. 

    I will explain the reasons for the delay and present a plan to mitigate it.

    • Communicate the reasons for the delay clearly and honestly

    • Present a plan to mitigate the delay and ensure timely delivery

    • Provide regular updates on the progress of the project

    • Offer alternative solutions or compromises if necessary

    • Ensure that the client understands the impact of the delay on the project

    • Maintain a professional and respectful attit

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: Questions will be from aptitude and vocabulary
Duration: 1 hour
Total Questions: 60

I appeared for an interview before May 2016.

Interview Questionnaire 

1 Question

  • Q1. 3-4

Interview Preparation Tips

Round: Test
Experience: The first round round had basic medium level apti questions
Duration: 5 hours
Total Questions: 20

Round: Group Activity
Experience: Each person has to talk on a random topic for 2 mins
Tips: Kindly speak on topics that are not so famous , choose a different topic , be unique. I spoke on the topic about why Ban of Maggi in India

Round: HR Interview
Experience: Once you have gone through all the previous rounds , 99 % selected . It consist a couple of basic questions
Tips: Be Easy and dont exaggerate

Skills: Communication And Confidence, Communication And Confidence

Interview Preparation Tips

Round: Test
Experience: AMCAT conducted our initial test. The Aptitude included 3 sections as mentioned above. The AMCAT tests are adaptive in their questions. Means if you answer a wrong question the next question will be of lower difficulty and the other way around when you answer it right. This actually helps and amplifies your strengths.

Tips: The questions for English section are always repeated. Study the previous sample papers from AMCAT website
website.
Duration: 75 minutes
Total Questions: AMCAT

Skills: General Aptitude
College Name: SKN Sinhgad Institute of Technology

I appeared for an interview before Jan 2016.

Interview Preparation Tips

Round: Test
Duration: 5 minutes

College Name: NIT Silchar

I appeared for an interview in Sep 2016.

Interview Questionnaire 

1 Question

  • Q1. Project related questions

Interview Preparation Tips

Round: Test
Experience: It was just an aptitude test.It contains 3 sections verbal,quant and technical

Round: Technical + HR Interview
Experience: It was just an aptitude test.It contains 3 sections verbal,quant and technical

College Name: Mitcoe

Qubole Interview FAQs

How to prepare for Qubole interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Qubole. The most common topics and skills that interviewers at Qubole expect are Big Data, Python, Java, Machine Learning and Hadoop.

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Qubole Reviews and Ratings

based on 7 reviews

4.5/5

Rating in categories

4.1

Skill development

4.8

Work-life balance

4.5

Salary

3.6

Job security

4.9

Company culture

4.1

Promotions

4.9

Work satisfaction

Explore 7 Reviews and Ratings
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Kolkata,

Mumbai

+5

4-9 Yrs

Not Disclosed

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Remote

3-8 Yrs

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7-12 Yrs

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