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Cognizant Interview Experience for Java Spring Boot Full Stack Developer

Last Updated : 04 Jan, 2024
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I appeared in a Cognizant Interview for Java Spring Boot Full Stack Developer.
There were 2 rounds (1 Technical & 1 HR). Below are the technical round questions.


  • Features of JAVA 8.
  • What is a null pointer?
  • Which is the superclass of all classes in JAVA?
  • Which is the Exception of all Exceptions in JAVA?
  • Explain Getter, Setters & toString.
  • Explain Polymorphism in JAVA
  • Difference between the following:
  1. Array and List
  2. List and Set
  3. Set and Map
  4. Interface and Class
  5. Java and Javascript
  6. Checked and Unchecked Exception
  • What are micro-services?
  • Types of micro-services.
  • What are comparators in JAVA?
  • What is collection and its hierarchy?
  • What is the method of Overloading?
  • What is the method of Overriding?
  • Explain equal() and hashCode()


  • What is schema?
  • Difference between Drop, Delete and Truncate table.


  • What is the Arrow function?
    I had cleared the technical round and got a call from HR after 10 days(approx) for the HR round. After the HR round, I didn’t get any response even after 2-3 follow-ups. In HR round Questions were:

HR Round:

  • About yourself.
  • Your current role and responsibility.
  • How is this position relevant to your current work and your skill set.
  • Why do you want to leave your current company?
  • Why do you want to join Cognizant?
  • What is the notice period & is it negotiable?
  • Current & Expected CTC.

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