Cognizant Trainee Programmer Interview Questions, Process, and Tips

I rate myself differently in different languages based on my experience and proficiency.

• Java - 8: I have worked on multiple projects using Java and have a good understanding of its concepts.

• Python - 7: I have used Python for scripting and automation tasks and have a decent understanding of its libraries.

• C++ - 6: I have basic knowledge of C++ and have implemented some algorithms using it.

• JavaScript - 8: I have worked on...read more

I have worked on a project for a retail company and currently working on a project for a finance company.

• Developed a web application for a retail company to manage their inventory and sales.

• Working on a mobile application for a finance company to provide financial advice to users.

• Used Java and Spring framework for the retail project and React Native for the finance project.

• Collaborated with a team of developers and des

Encapsulation is the process of hiding implementation details and restricting access to an object's properties and methods.

• Encapsulation helps in achieving data abstraction and information hiding.

• It prevents unauthorized access to an object's internal state.

• It allows for better control over the object's behavior.

• Example: A bank account class with private variables for balance and account number.

• Example: A car class wit...read more

Polymorphism is the ability of an object to take on many forms.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables methods to be defined in the superclass and overridden in the subclasses.

• Polymorphism helps in achieving code reusability and flexibility in object-oriented programming.

• Example: A superclass 'Animal' with subclasses 'Dog' and 'Cat'. Both 'Dog' and 'Ca

A program to check if a given string is a palindrome or not.

• Take input string from user

• Reverse the string

• Compare the reversed string with the original string

• If both are same, then the string is a palindrome

• Else, the string is not a palindrome

API stands for Application Programming Interface. It is a set of protocols, routines, and tools for building software applications.

• API allows different software applications to communicate with each other

• It defines how software components should interact

• APIs can be public or private

• Examples of APIs include Google Maps API, Twitter API, and Facebook API