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Junior Java Developer Interview Questions

"Junior developers are often responsible for writing the more monotonous and simple code required by senior members of the development team. Because of this, interviews will be designed to test your knowledge of the fundamentals of Java so be prepared to answer technical questions that you likely came across in college. Data structures and algorithms will be heavily emphasised. A bachelor's degree or equivalent work experience is required. "

3,800 junior java developer interview questions shared by candidates

🔐 Encapsulation & Private Use What is encapsulation in Java? Why are class variables marked private? How does using private variables and public getters/setters help in encapsulation? Can we access private variables outside the class? If yes, how? 🔁 Method vs Function What is the difference between a method and a function in Java? Can we create functions outside a class in Java? Why is everything inside a class in Java? ⚠️ Exception Handling (Try-Catch-Finally) What is exception handling? Why is it important in Java? What is the use of try, catch, and finally blocks? Will finally always execute even if there is a return in the try block? What is the difference between throw and throws in Java? 💡 Method Overloading vs Overriding What is method overloading? Give a real-life example. What is method overriding? Where is it used? Can we overload methods with different return types only? What happens if we remove @Override in an overridden method? 🌀 Stream API (Java 8) What is the use of Stream API in Java? How do you filter even numbers from a list using Stream? What is the difference between map() and filter() in Stream? 🛑 final, finally, finalize What is the use of the final keyword in Java? How is finally block different from final keyword? When is the finalize() method called?
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Junior Java Developer

Interviewed at Aurionpro Solutions

3.7★
Jul 21, 2025

🔐 Encapsulation & Private Use What is encapsulation in Java? Why are class variables marked private? How does using private variables and public getters/setters help in encapsulation? Can we access private variables outside the class? If yes, how? 🔁 Method vs Function What is the difference between a method and a function in Java? Can we create functions outside a class in Java? Why is everything inside a class in Java? ⚠️ Exception Handling (Try-Catch-Finally) What is exception handling? Why is it important in Java? What is the use of try, catch, and finally blocks? Will finally always execute even if there is a return in the try block? What is the difference between throw and throws in Java? 💡 Method Overloading vs Overriding What is method overloading? Give a real-life example. What is method overriding? Where is it used? Can we overload methods with different return types only? What happens if we remove @Override in an overridden method? 🌀 Stream API (Java 8) What is the use of Stream API in Java? How do you filter even numbers from a list using Stream? What is the difference between map() and filter() in Stream? 🛑 final, finally, finalize What is the use of the final keyword in Java? How is finally block different from final keyword? When is the finalize() method called?

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