Burns & McDonnell Interview Questions and Answers

Inheritance is a concept in object-oriented programming where a class can inherit attributes and methods from another class. A class is a blueprint for creating objects, while an object is an instance of a class.

• Inheritance allows a class to reuse code from another class, promoting code reusability and reducing redundancy.

• A class is a template or blueprint for creating objects, defining attributes and methods.

• An object is an instance of a class, representing a specific entity...read more

Oops concepts in Java refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability of a method to do different things based on the object it is acting upon.

• Abstraction: Hiding the implementation details and showing only the necessary feature...read more

Collections in Java refer to classes and interfaces that implement data structures like lists, sets, and maps.

• Collections provide a way to store and manipulate groups of objects in Java

• Examples include ArrayList, LinkedList, HashSet, and HashMap

• Collections framework includes interfaces like List, Set, Map, and classes like ArrayList, HashSet, and HashMap

List and Set are both interfaces in Java used to store collections of elements, but with different characteristics.

• List is an ordered collection that allows duplicate elements, while Set is an unordered collection that does not allow duplicates.

• List implementations include ArrayList, LinkedList, and Vector, while Set implementations include HashSet, TreeSet, and LinkedHashSet.

• List allows access to elements by index, while Set does not guarantee any specific order of elements....read more

Program to generate prime numbers

• Create a function to check if a number is prime

• Iterate through numbers and check for prime numbers

• Store prime numbers in an array