OpenText Technologies Associate Software Engineer Interview Questions and Answers

Multithreading in Java allows multiple threads to execute concurrently within a single program.

• Multithreading improves performance by allowing multiple tasks to run simultaneously.

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

• Synchronization is important to prevent race conditions and ensure thread safety.

• Examples of multithreading in Java include GUI applications, server applications, and game development.

• Multithreading can...read more

Collections Framework is a set of classes and interfaces that provide reusable data structures in Java.

• It provides interfaces like List, Set, Queue, etc. for storing collections of objects.

• It also provides classes like HashMap, TreeMap, etc. for storing key-value pairs.

• It simplifies the process of storing and manipulating data in Java programs.

• It improves the performance of Java programs by providing efficient data structures.

• Example: ArrayList is a class that implements the ...read more

Exception handling is a mechanism to handle runtime errors in Java programs.

• Exceptions are objects that are thrown at runtime when an error occurs

• try-catch block is used to handle exceptions

• finally block is used to execute code regardless of whether an exception is thrown or not

• Java provides built-in exceptions like ArithmeticException, NullPointerException, etc.

• Custom exceptions can also be created by extending the Exception class

OOPS in Java is a programming paradigm that emphasizes on objects and their interactions.

• OOPS stands for Object-Oriented Programming System

• Java is an OOPS language that supports encapsulation, inheritance, and polymorphism

• Encapsulation is the process of hiding data and methods within a class

• Inheritance allows a subclass to inherit properties and methods from a superclass

• Polymorphism allows objects to take on multiple forms or behaviors

• Example: A car class can have properties ...read more

Find the largest number in an array of strings.

• Convert each string in the array to a number using parseInt()

• Use Math.max() to find the largest number in the array