Extramarks Education Junior System Engineer Interview Questions and Answers

Object-oriented programming concepts and error handling in Java

• OOP concepts include inheritance, polymorphism, encapsulation, and abstraction

• Exceptions are used to handle errors and unexpected events in Java

• Java has built-in exception classes like NullPointerException and IOException

• Custom exceptions can be created by extending the Exception class

Matrix and design coding in C or Java

• Matrix operations like addition, multiplication, transpose can be implemented using arrays in C or Java

• Design patterns like Singleton, Factory, Observer can be implemented in Java

• Java has built-in support for matrix operations through libraries like Apache Commons Math

• C can be used for low-level matrix operations and optimization

• Design patterns can improve code maintainability and s