Miracle Software Systems Software Engineer Trainee Interview Questions, Process, and Tips

Java current version is Java 17.

• Java 17 was released on September 14, 2021.

• It introduced new language features like sealed classes, pattern matching for switch statements, and records.

• Java 17 is a long-term support (LTS) release, with support until September 2024.

Multi-threading in Java is achieved by creating and managing multiple threads to execute tasks concurrently.

• Use the Thread class or implement the Runnable interface to create threads

• Use the start() method to start a thread

• Synchronize shared resources using synchronized keyword or locks to prevent race conditions

• Use Executor framework for managing thread pools and executing tasks

Exception handling in Java is a mechanism to handle runtime errors and prevent program crashes.

• Java uses try-catch blocks to handle exceptions

• Exceptions can be caught and handled or propagated to higher levels

• Common exceptions include NullPointerException, ArrayIndexOutOfBoundsException, and IOException

No, constructors do not have a return type.

• Constructors do not have a return type specified in their declaration.

• Constructors are used to initialize objects of a class and do not return any value.

• Example: public MyClass() { // constructor code }

Yes, JDK is platform independent.

• JDK (Java Development Kit) is platform independent because Java programs can run on any platform that has a Java Virtual Machine (JVM) installed.

• The same Java code can be run on different operating systems such as Windows, macOS, and Linux without any modifications.

• This platform independence is achieved through the concept of 'write once, run anywhere' (WORA) in Java.