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5,300 senior developer java interview questions shared by candidates

Write a code in which a method receives list and string and returns true if the string exists in list and false if it do not exist. What is scriplet and what is expression? What is the internal logic behind hashMap execution? Does hashmap size affects the performance of hashmap? This question is asked in almost all interviews. What is atomicity? Is count++ operation thread safe? Why? What is the difference between Callable and Runnable? What is the difference between IOC and dependency injection? Is dependency injection is the concept only used in Spring? what is the difference between final, finally and finalize? If we declare arrayList as final, can we remove elements from arrayList? How did you handled spring security in your project? What is a WSDL and different parts of WSDL? What are the advantages of REST over SOAP? Why should we implement Cloneable interface if we have to clone an object, though clone method comes from Object class? How is a variable shared between multiple threads? What is a thread deadlock? How do we avoid it? What is Hibernate Unidirectional and Bidirectional? What is the method to be overridden if we are implementing MessageDrivenBean? What are the advantages of using Generics?
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Senior Java Developer

Interviewed at CGI

3.7★
Mar 29, 2017

Write a code in which a method receives list and string and returns true if the string exists in list and false if it do not exist. What is scriplet and what is expression? What is the internal logic behind hashMap execution? Does hashmap size affects the performance of hashmap? This question is asked in almost all interviews. What is atomicity? Is count++ operation thread safe? Why? What is the difference between Callable and Runnable? What is the difference between IOC and dependency injection? Is dependency injection is the concept only used in Spring? what is the difference between final, finally and finalize? If we declare arrayList as final, can we remove elements from arrayList? How did you handled spring security in your project? What is a WSDL and different parts of WSDL? What are the advantages of REST over SOAP? Why should we implement Cloneable interface if we have to clone an object, though clone method comes from Object class? How is a variable shared between multiple threads? What is a thread deadlock? How do we avoid it? What is Hibernate Unidirectional and Bidirectional? What is the method to be overridden if we are implementing MessageDrivenBean? What are the advantages of using Generics?

1)What is Inheritance and deep dive.2) Jvm heap memory 3) how much memory does integer occupy 4) Exception handling questions how it is applied in parent and child class.5) How can we change the log level of an application in a production environment.6) Access modifiers inside the inheritance Ex: Private method in parent class can this be accessed inside the child class.
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Senior Java Developer

Interviewed at Entain India

3.6★
Dec 5, 2016

1)What is Inheritance and deep dive.2) Jvm heap memory 3) how much memory does integer occupy 4) Exception handling questions how it is applied in parent and child class.5) How can we change the log level of an application in a production environment.6) Access modifiers inside the inheritance Ex: Private method in parent class can this be accessed inside the child class.

First They conducted one Written test : Write a program to find minimum element from unsorted array. Count ways to reach the nth stair using step 1, or 2 or both For ex :If we want to reach at 4th Step: No of ways would be : 1+1+1+1 2+2 1+1+2 2+1+1 Java Program to Print sequence of numbers using threads Data Strucutres Core Java -Generics,Hash Map internal working,Collection API,Exception Handling Rest API related question
avatar

Senior Java Developer

Interviewed at UBS

3.7★
Dec 3, 2018

First They conducted one Written test : Write a program to find minimum element from unsorted array. Count ways to reach the nth stair using step 1, or 2 or both For ex :If we want to reach at 4th Step: No of ways would be : 1+1+1+1 2+2 1+1+2 2+1+1 Java Program to Print sequence of numbers using threads Data Strucutres Core Java -Generics,Hash Map internal working,Collection API,Exception Handling Rest API related question

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