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Java Developer

Duronto Technologies
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1 rounds | 1 Coding problems

Interview preparation journey

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Journey
My preparation for the Java Developer role focused on building a strong foundation in Core Java concepts such as OOP principles, collections, multithreading, and exception handling. I then advanced to working with the Spring Framework and Hibernate to understand enterprise-level application development and database interaction.
Preparation
Topics: Java, Spring boot, Hibernate
Application process
Where: Coding Ninjas Placement Cell
Eligibility: Bachelor’s degree in CS/IT

Interview rounds

01
Round
Easy
Online Coding Interview
Duration
Interview date9 Sep 2025
Coding problem1

1. Java (Basics)

  1. You are given a Student list with fields (id, name, marks). How would you store this data in a HashMap? Can you override any internal methods of HashMap and explain how comparison is handled?
  2. How would you sort the students to find the 1st, 2nd, and 3rd highest marks?
  3. Can you explain and demonstrate exception handling in Java with examples?
  4. What is JpaRepository in Spring Data JPA? How does it work, and how can you handle/destructure the response at the output?
  5. What is the difference between Comparator and Comparable in Java? Can you give examples of when to use each?
  6. In MySQL, how does the GROUP BY function work? Can you give an example query using it?

Here's your problem of the day

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Skill covered: Programming

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