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30,890 software java engineer interview questions shared by candidates

Jpa and hibernet diff.when we use hibernet ?when we use jpa? How to maintain connectionpooling?needs to know design pattern with examples.code quality and code formaters and tools for using unit testing.how you test the performance of your code?multi threading,synchronization,spring security,db designing of your project.what steps needs to take care while reviewing the code.scrum agile metholody ,jira.other than this they will ask the questions related the some scenarios.
avatar

Java Developer

Interviewed at BAE Systems

3.9★
Sep 28, 2017

Jpa and hibernet diff.when we use hibernet ?when we use jpa? How to maintain connectionpooling?needs to know design pattern with examples.code quality and code formaters and tools for using unit testing.how you test the performance of your code?multi threading,synchronization,spring security,db designing of your project.what steps needs to take care while reviewing the code.scrum agile metholody ,jira.other than this they will ask the questions related the some scenarios.

Q1) Write simple java code for ,whether given string have character "i" ,using stream API only. Ex: If input is "hello" word, output will be false, as the word doesn't have letter "i". Q2) what is volatile keyword is used for? Q3)explain oops concepts? Q4)why java doesn't support multiple inheritance, what happens if we try to implement? can you explain with some example ? Q5)what is multi threading? Do you know about executor ? Q6)what is REST? Q7)When we are opening a google page, which type of request it is?GET or POST or other requests? Q8)how Requests are mapping with servlets in SPRING MVC? can you explain? Q9)Why spring boot s required,when we have many spring components already?Advanatages of Springboot? Q10)what is Springboot profiling concept? Q11)What are the things you write or configure,in your spring boot application,related to tomcat? Q12)what collections you used in your project?explain How hashmap buckets internally works? Q13)DIfference between HTTP and HTTPS? Q14)What type of errorcodes you get genearlly, when you access a REST webservice using browser? etc
avatar

Java Developer

Interviewed at Synechron

4.1★
Jun 7, 2022

Q1) Write simple java code for ,whether given string have character "i" ,using stream API only. Ex: If input is "hello" word, output will be false, as the word doesn't have letter "i". Q2) what is volatile keyword is used for? Q3)explain oops concepts? Q4)why java doesn't support multiple inheritance, what happens if we try to implement? can you explain with some example ? Q5)what is multi threading? Do you know about executor ? Q6)what is REST? Q7)When we are opening a google page, which type of request it is?GET or POST or other requests? Q8)how Requests are mapping with servlets in SPRING MVC? can you explain? Q9)Why spring boot s required,when we have many spring components already?Advanatages of Springboot? Q10)what is Springboot profiling concept? Q11)What are the things you write or configure,in your spring boot application,related to tomcat? Q12)what collections you used in your project?explain How hashmap buckets internally works? Q13)DIfference between HTTP and HTTPS? Q14)What type of errorcodes you get genearlly, when you access a REST webservice using browser? etc

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