FTS Building Systems Interview Questions and Answers

Java does not support multiple inheritance, but it can be achieved through interfaces.

• Java does not allow multiple inheritance of classes due to the diamond problem.

• However, multiple inheritance can be achieved through interfaces.

• A class can implement multiple interfaces, which can have their own default implementations.

• Example: class A implements Interface1, Interface2 { }

Exception handling is the process of handling errors and unexpected events in a program.

• Exceptions are thrown when an error occurs in the program.

• The try-catch block is used to handle exceptions.

• The catch block catches the exception and handles it appropriately.

• Finally block is used to execute code regardless of whether an exception was thrown or not.

• Exception handling helps in making the program more robust and prevents it from crashing.

Inheritance in Java allows a class to inherit properties and behaviors from another class.

• Inheritance enables code reusability and promotes the concept of hierarchical classification.

• Subclasses can access the methods and fields of their superclass.

• Example: class Dog extends Animal, where Dog inherits properties and behaviors from Animal.

Multithreading is a programming concept where multiple threads within a process execute independently to improve performance.

• Multithreading allows for concurrent execution of tasks within a single process

• Threads share the same memory space, allowing for efficient communication and data sharing

• Examples include running multiple tasks simultaneously in a web server or processing multiple data streams in a video editing software

A class is a blueprint for creating objects in object-oriented programming.

• Classes define the properties and behaviors of objects.

• Objects are instances of classes.

• Classes can inherit properties and behaviors from other classes.

• Example: Class 'Car' may have properties like 'color' and 'model', and behaviors like 'drive' and 'stop'.

OOPs (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code.

• OOPs focuses on creating reusable code by organizing data into objects and defining their behavior through methods.

• Java is a popular programming language that supports OOPs principles such as encapsulation, inheritance, polymorphism, and abstraction.

• Example: In Java, a class 'Car' can have attributes like 'model' and 'color' and methods like 'drive()' ...read more