Java Collection Interview Questions with Answers

1. What is the difference between List, Set, and Map? Answer: 2. How does HashMap work internally? Answer: 3. Difference between HashMap and Hashtable Answer: 4. Fail-Fast vs Fail-Safe Iterators Answer: 5. Difference between ArrayList and LinkedList Answer: 6. Comparable vs Comparator Answer: Example: java 7. Difference between HashSet and TreeSet Answer: 8. ConcurrentHashMap vs … Read more

Java Interview Questions and Answers

1. What is Java? Java is a high-level, object-oriented programming language. It is platform independent because Java programs run on JVM. 2. Why is Java platform independent? Java code is compiled into bytecode, which can run on any operating system using JVM. 3. What is JVM? JVM (Java Virtual Machine) executes Java bytecode and converts … Read more