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      Crest Infosystems

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      Devops Engineer Interview

      Jun 6, 2026
      Anonymous interview candidate
      Ānand
      No offer
      Positive experience
      Average interview

      Application

      I applied through university. I interviewed at Crest Infosystems (Ānand) in Jul 2025

      Interview

      I attended the on-campus interview process for the role of [Role Name]. The interview experience was overall very positive. The interviewer was friendly, supportive, and made the discussion comfortable throughout the technical round. The technical interview mainly focused on basic concepts of Object-Oriented Programming (OOP), Database Management Systems (DBMS), Data Structures & Algorithms (DSA), and Design & Analysis of Algorithms (DAA). Most of the questions were concept-based and aimed at checking fundamental understanding rather than advanced problem solving. The interviewer also asked some scenario-based questions to understand my practical thinking and approach toward solving real-world problems. The discussion was interactive, and the interviewer provided hints whenever needed. Overall, the interview difficulty level was moderate for someone with good fundamentals in core computer science subjects.

      Interview questions [5]

      Question 1

      OOP Questions What are the four pillars of OOP? Difference between abstraction and encapsulation. What is inheritance? Explain polymorphism with an example. Difference between method overloading and method overriding.
      Answer question

      Question 2

      DBMS Questions What is normalization? Difference between SQL and NoSQL databases. What are primary key and foreign key? Difference between DELETE, DROP, and TRUNCATE. What is indexing in databases?
      Answer question

      Question 3

      DSA Questions Difference between array and linked list. What is stack and queue? Explain time complexity. What is the difference between BFS and DFS? Basic sorting algorithm questions.
      Answer question

      Question 4

      DAA Questions What is Big O notation? Difference between greedy and dynamic programming. Explain divide and conquer approach. Time complexity of common sorting algorithms.
      Answer question

      Question 5

      Scenario-Based Questions How would you optimize a slow application? How would you handle large amounts of data efficiently? Suppose multiple users access the same data simultaneously, how would you manage it? Explain a situation where you used problem-solving skills in a project.
      Answer question