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What are the main features of Java? Explain the concept of Object-Oriented Programming (OOP) in Java. What is the difference between JDK, JRE, and JVM? How does garbage collection work in Java? What are the different types of memory areas allocated by JVM?
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Software Engineer - Java Developer

Interviewed at FourKites

3.4★
Dec 28, 2024

What are the main features of Java? Explain the concept of Object-Oriented Programming (OOP) in Java. What is the difference between JDK, JRE, and JVM? How does garbage collection work in Java? What are the different types of memory areas allocated by JVM?

First round: ========= Threads, abstraction, interface, some java programs, Exception, collection, hash map, internal functionality, if I give return statement, system.exit(0) in try catch what will happen ? comparator interface, programs from array and arraylist, how to convert the array to arraylist. what is singleton, How to create singleton class, sessionfactory, IOC, types of set collection ( she meant implementation class for set interface ha ha ha ), design patterns. difference btw throw & throws. You must be very clear in core java concepts & very confident in your answers. I was waited for 10 mins then got a call for second round. It was quite normal. not much more technical questions. 1. Tell me about your self. 2. Why you are looking for change. 3. what difficulty you faced in previous project. 4. How to handle the memory management 5. What are the coding standards which we need to follow. After that again I have waited for 10 mins and got a call for 3rd round which is U.S. ascent english test. My fate I didn't clear this round. Before attending the interview in Deliote please go-through the mentioned questions. Hope everyone will get these kind of questions.
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Software Engineer for Java Profile

Interviewed at Deloitte

3.8★
Mar 13, 2016

First round: ========= Threads, abstraction, interface, some java programs, Exception, collection, hash map, internal functionality, if I give return statement, system.exit(0) in try catch what will happen ? comparator interface, programs from array and arraylist, how to convert the array to arraylist. what is singleton, How to create singleton class, sessionfactory, IOC, types of set collection ( she meant implementation class for set interface ha ha ha ), design patterns. difference btw throw & throws. You must be very clear in core java concepts & very confident in your answers. I was waited for 10 mins then got a call for second round. It was quite normal. not much more technical questions. 1. Tell me about your self. 2. Why you are looking for change. 3. what difficulty you faced in previous project. 4. How to handle the memory management 5. What are the coding standards which we need to follow. After that again I have waited for 10 mins and got a call for 3rd round which is U.S. ascent english test. My fate I didn't clear this round. Before attending the interview in Deliote please go-through the mentioned questions. Hope everyone will get these kind of questions.

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