100+ NatWest Group Interview Questions and Answers

Find duplicates in an array of strings

• Iterate through the array and use a hash set to keep track of seen elements

• If an element is already in the hash set, it is a duplicate

• Return a list of all duplicates found

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

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

• Polymorphism: Ability of objects to take on multiple forms.

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

• Abstraction: Hiding the complex implementation details and showing only the necessary features.

A framework is a structured set of guidelines, libraries, and tools used to develop and maintain software applications.

• Framework provides a foundation for building software applications

• It includes reusable code libraries, tools, and best practices

• Frameworks help in organizing code, improving efficiency, and promoting consistency

• Examples: Selenium for web automation testing, TestNG for test management in Java

Using states in Terraform to manage infrastructure

• Terraform state is used to store information about the infrastructure being managed

• State files can be stored locally or remotely

• State files should be stored securely to prevent unauthorized access