String rotation
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.
30,813 java developer interview questions shared by candidates
Given a binary tree, a node is visible if the value it holds is no greater than all the values along the path from the root. Write pseudo-code for an efficient algorithm to find the number of visible nodes in this tree.
See full description above for examples.
OOP Question, data structure, SQL(Joins), coding question, add two number(numbers in the string type)
Education and work experience Technical questions: Core Java SQL
oops concept,method overriding,method overloading, inheritance
Asked few puzzles that too orally
What are the advantage of using polymorphism?
What do you like about software development?
Concurrent package collection, Semaphore,Cyclic Barrier, Class Level Lock, Object level Lock, Access Modifier, Serialization, Tree Map, Comparator vs Comparable. Design patterns,SOLID Paper code -> Prime Number, Cylic String
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