Java Programming - MCQ Practice Questions
Java interviews and campus tests lean heavily on object oriented behaviour rather than API recall. This set covers inheritance and polymorphism, interfaces and abstract classes, the collections framework, exception handling, multithreading, string handling, and JVM basics such as garbage collection. Output based questions are included because they expose the gaps that theory questions hide.
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What will be the output of the following code?
java
List<String> list = new ArrayList<String>();
list.add("Java");
Object obj = list;
System.out.println(list.getClass() == obj.getClass());
Which of the following correctly declares a generic method that returns the first element of any collection?
Which declaration is valid in Java Generics?
In a Spring Boot application, you need to create a generic repository interface that works with any entity type. Which declaration correctly implements this pattern?
When using bounded type parameters with multiple interfaces, what is the correct syntax in Java?