Entry level java developer Interview Questions
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Entry Level Java Developer interview questions shared by candidates
Technical Questions: 1. Three pillars of OOP with explanation of each 2. Final Keyword in Java 3. Abstract Class & Interface difference 4. JSP & Servlets difference 5. What is meant by immutability in Java? 6. Multi-threading - Sleep vs Yield? 7. What is a design pattern and name some. Explain Singleton Design Pattern? 8. protected keyword in access modifiers 9. Continue vs break statement 10. Describe MVC? 11. StringBuffer vs StringBuilder? 12. One logic/algo question: Inserting an element at proper position in a sorted array. They will focus on the very basic logic design like loops, function and their arguments.
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You said that every one who is interviewed by CEO gets offer then how come you haven't received offer?!! Less
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I got the offer.
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Algo Approach: Use Binary Search to find the location where the element is to be inserted and store in a variable index. Call a function insert(a,index,newVal) where a is the sorted array. Run a for loop until index and copy elements into a new array. newArray[index] = newVal and continue copying elements from the given array into the new Array. Less
Programming experience?
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It looks great if you've had interesting projects outside of course work. If not, make sure you can speak clearly about your larger school projects, including choice of technology (pros and cons), development cycle, problems encountered and how you significantly contributed to the projects success. Less
What are design patterns and can you give a few example of design patterns in JAVA?
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I don't know.......
What is a pointer? What is a stack and how would you use one? How would you tell if two strings are permutations?
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"AAB" "ABA" ans1: sort each string and compare ans2: store each character from the first string in a hashmap that takes the letter as a key and its frequency as the value. iterate through the second string and subtract one from the value of the corresponding letter. if the hashmap values are all zero than it is a permutation. Less