1. What are the main features introduced in Java 8? Answer: 2. Write a Java 8 program to filter even numbers from a list. Answer: java Output: Code 3. What is the difference between map() and flatMap() in Streams? Answer: java Output: Code 4. Explain Optional in Java 8 with an example. Answer: Optional is … Read more
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
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