Cognizant Interview Questions, Process, and Tips

Q1. Work experience and technical fundamentals and some advanced questions asked.
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Q1. About salary expectation
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Q1. Basic python questions
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Q1. Salary expectation from job
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Basic java program where interviewer wanted to check java concepts

Q1. Any existing offer?
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Q2. When can you join?
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Q1. Aptitude based questions
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Q2. Write a program to calculate the sum of the digits of a number.
Ans. 
This program calculates the sum of the digits of a given integer number.
• Convert the number to a string to iterate through each digit.

• Initialize a sum variable to zero.

• For each character in the string, convert it back to an integer and add it to the sum.

• Return or print the final sum.
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Q3. What is the program to find the Fibonacci series?
Ans. 
The Fibonacci series is a sequence where each number is the sum of the two preceding ones, starting from 0 and 1.
• The Fibonacci series starts with 0 and 1.

• The next number is found by adding up the two numbers before it.

• Example: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...

• A simple implementation can be done using recursion or iteration.

• In Python, you can use a loop or a recursive function to generate the series.
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Q4. Write a program to reverse an array.
Ans. 
This program reverses an array of strings by swapping elements from both ends towards the center.
• Define a function that takes an array of strings as input.

• Use a loop to swap elements from the start and end of the array.

• Continue swapping until the middle of the array is reached.

• Example: Input: ['apple', 'banana', 'cherry'], Output: ['cherry', 'banana', 'apple'].
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Q5. What is Object-Oriented Programming (OOP)?
Ans. 
Object-Oriented Programming (OOP) is a programming paradigm based on the concept of objects, which can contain data and methods.
• Encapsulation: Bundling data and methods that operate on the data within one unit (e.g., a class).

• Inheritance: Mechanism to create a new class using properties and methods of an existing class (e.g., a 'Dog' class inheriting from an 'Animal' class).

• Polymorphism: Ability to present the same int...read more
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Q1. Related to oops
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Q2. Related to java
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Topics related to general aptitude.

Q1. Overall educational background
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