Maxsys Technology Interview Questions and Answers

Threads in Java are lightweight sub-processes that run concurrently within a single process.

• Threads allow for parallel execution of tasks in Java programs.

• Each thread has its own stack and shares the same heap memory with other threads.

• Threads are created by extending the Thread class or implementing the Runnable interface.

• Example: Thread t1 = new Thread(new MyRunnable()); t1.start();

Collection refers to a single group of items, while collections denote multiple groups or types of items.

• Collection: A single instance of a group, e.g., a list of users.

• Collections: Multiple groups, e.g., lists of users, products, and orders.

• In programming, 'Collection' often refers to a specific data structure, while 'Collections' can refer to a library of such structures.

• Example in Java: 'Collection' is an interface,...read more

A truple in a database is a tuple with three values instead of the usual two.

• A truple is similar to a tuple, but with three elements instead of two

• Truples are commonly used in databases to store data with three related attributes

• Example: (John, Doe, 25) is a truple representing a person's first name, last name, and age

Covariant in Java refers to the ability of a subclass to return a more specific type than the superclass in overridden methods.

• Covariant return type allows a subclass method to return a subtype of the return type of the overridden method in the superclass.

• It is achieved by using the 'extends' keyword in the return type of the subclass method.

• Example: class Animal { Animal getAnimal() { return new Animal(); } } class Do...read more