Decipher Zone Technologies Interview Questions and Answers

Multithreading is a programming technique that allows concurrent execution of two or more threads for improved performance.

• Multithreading enables parallel execution, improving application responsiveness.

• Java provides built-in support for multithreading through the Thread class and Runnable interface.

• Example: A web server can handle multiple client requests simultaneously using threads.

• Synchronization is crucial to prev...read more

JavaMail is an API for sending and receiving emails in Java applications, supporting various protocols like SMTP, IMAP, and POP3.

• JavaMail API allows developers to send and receive emails programmatically.

• It supports multiple protocols: SMTP for sending, IMAP and POP3 for receiving.

• Example of sending an email using JavaMail: Properties props = new Properties(); props.put('mail.smtp.host', 'smtp.example.com'); ...read more

Method overloading is when multiple methods in a class have the same name but different parameters.

• Allows multiple methods with the same name but different parameters in a class

• Parameters can differ in number, type, or order

• Compile-time polymorphism

• Example: void print(int a) and void print(String s)

In Java, a child class can acquire properties of its parent class using inheritance, allowing code reuse and polymorphism.

• Inheritance allows a subclass to inherit fields and methods from a superclass.

• Use the 'extends' keyword to create a subclass. Example: 'class Dog extends Animal {}'

• Access parent class properties using 'super' keyword. Example: 'super.methodName()'

• Override parent class methods in the child class to p...read more