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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. "

3,801 junior java developer interview questions shared by candidates

Q1. Explain JDK, JRE and JVM? Q2. Explain public static void main(String args[]) in Java Q3. Why Java is platform independent? Q4. Why Java is not 100% Object-oriented? Q5. What are wrapper classes in Java? Q6. What are constructors in Java? Q7. What is singleton class in Java and how can we make a class singleton? Q8. What is the difference between Array list and vector in Java? Q9. What is the difference between equals() and == in Java? Q10. What are the differences between Heap and Stack Memory in Java?
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Junior Java Developer

Interviewed at Tata Consultancy Services

3.5★
Mar 31, 2022

Q1. Explain JDK, JRE and JVM? Q2. Explain public static void main(String args[]) in Java Q3. Why Java is platform independent? Q4. Why Java is not 100% Object-oriented? Q5. What are wrapper classes in Java? Q6. What are constructors in Java? Q7. What is singleton class in Java and how can we make a class singleton? Q8. What is the difference between Array list and vector in Java? Q9. What is the difference between equals() and == in Java? Q10. What are the differences between Heap and Stack Memory in Java?

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