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Java Developer Interviews
Java Developer Interview Questions
In your interview for a java developer position, be prepared to answer technical questions that test your understanding of Java basics. Interviewers may also ask open-ended questions to assess your coding and problem-solving abilities. Prepare for non-technical questions that focus on time management, interpersonal communication, and work ethic.
Top Java Developer Interview Questions & How to Answer
Question 1
Question #1: What is the difference between HashTable and HashMap in Java?
How to answer
How to answer: Interviewers use technical questions to assess your formal training and understanding of the Java programming language. Use your answer to demonstrate your communication skills. Even if you have been coding for some time, it can be helpful to review Java basics before your interview.
Question 2
Question #2: Write a program to determine if 243 is an Armstrong number.
How to answer
How to answer: Interviewers use open-ended questions to test your coding skills. This question allows the employer to assess your ability to solve a problem using a Java algorithm. Explain your thinking process as you use a code editor or whiteboard to solve the problem.
Question 3
Question #3: How do you produce quality code when you have several Java projects to complete at once?
How to answer
How to answer: Java developers often juggle multiple projects at the same time. Interviewers use questions such as this to test your time management and organizational skills. Employers are also trying to assess your commitment to quality work. If you have experience as a developer, include examples from your work history that demonstrate high-quality work and effective time management.
30,862 java developer interview questions shared by candidates
In the Java specification, it is considered good practice to override .equals() and .hashCode() both together. In the context of HashMap, explain why implementing only one of the two instead of both can cause problems. You must consider both cases.
Extensive java core questions and collection
Questions were quite simple like Define OOP Concepts in Java, Exception Handling and How to do inhertance and basic HR questions like Tell me something about yourself.
Can an interface contain static methods? Can they contain non-synchronized methods?
What is the difference between an Array and an ArrayList
Not even a single question was asked from Java.
Array programs. compare two arrays. find largest element in array. array length will vary. (not same length arrays will be given)
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1. Group people by name, age in using stream api, eg: [{ram, 29}, {kim.29}, {sandy,30}, {mark,34},{lisa,34},{steve,25} ] 2. using java write a program to make the 0 in left side and 1 in right side, an array of mixed value of 0s, 1s
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