Cognizant Interview Questions, Process, and Tips

Two simple questions were asked.

Q1. Simple Interest question were asked.
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Q2. Given an array, write a code to check which number is prime number.
Ans. 
Code to check prime numbers in an array
• Iterate through each number in the array

• For each number, check if it is divisible by any number from 2 to the square root of the number

• If the number is only divisible by 1 and itself, it is a prime number
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Aptitude test was conducted online.

Q1. What is difference between while and Do while
Ans. 
While loop checks the condition before executing the code block, while Do while loop executes the code block first and then checks the condition.
• While loop is entry controlled, Do while loop is exit controlled

• While loop may not execute at all if the condition is false initially, Do while loop executes at least once

• Example: while loop - while(i < 5) { //code } vs. do { //code } while(i < 5)
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Q2. OOPs concepts explanation with examples
Ans. 
OOPs concepts are fundamental principles in object-oriented programming that help in organizing code efficiently.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class). Example: Class Car with properties like make, model, and methods like start(), stop().

• Inheritance: Ability of a class to inherit properties and behavior from another class. Example: Class SUV inheriting from Class C...read more
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Q3. Tell me about your technical projects
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Basic maths, and verbal knowledge questions

Q1. Asked about Java OOPS concept., Database. Final year project details. Basic HR questions.
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Q2. SQL DDL,DML questions
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Q1. What is Captcha?
Ans. 
Captcha is a security measure used to determine whether a user is human or a bot by presenting a challenge that is easy for humans to solve but difficult for bots.
• Captcha stands for Completely Automated Public Turing test to tell Computers and Humans Apart.

• It typically involves distorted text that the user must enter correctly to proceed.

• Captcha can also include image recognition tasks or simple puzzles.

• Captcha helps p...read more
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Q2. Security principles
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Q3. Oops concepts and polymorphism
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Q1. Write a c program reversing your name
Ans. 
A C program to reverse a given name.
• Declare a character array to store the name.

• Use scanf() to take input of the name.

• Use strlen() function to find the length of the name.

• Use a for loop to iterate through the name in reverse order.

• Print the reversed name using printf().
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Q1. It's just a normal discussion
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It was a basic test with basic to mid level questions

Q1. Tell me about your ongoing project and explain it using a flow chart
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Q2. Tell me some technologies that were used in IT industry
Ans. 
Technologies used in IT industry include cloud computing, artificial intelligence, blockchain, and internet of things.
• Cloud computing: AWS, Azure, Google Cloud

• Artificial intelligence: Machine learning, natural language processing

• Blockchain: Bitcoin, Ethereum

• Internet of things: Smart homes, wearables
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Q1. What is your family background?
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Q2. Share details of your previous job.
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Q3. Why are you looking for a change?
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Q4. Where do you see yourself in 5 years?
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Q5. What are your strengths and weaknesses?
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Q6. Tell me about yourself.
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