Cognizant interview questions
Online test → Technical → HR·99% entry level
CS fundamentals
Showing 36 of 875 reported in this area
What is the difference between an abstract class and an interface in Java?
Explain different types of SQL joins.
What is the Singleton design pattern?
What is the difference between a list and a tuple in Python?
Explain OOPS concepts in Java
Explain ACID properties in DBMS
Explain exception handling in Java.
Difference between JDK, JRE, and JVM
What is SDLC (Software Development Life Cycle)?
What is inheritance in object-oriented programming?
Explain Object-Oriented Programming (OOPS) concepts.
What is the difference between DDL and DML commands?
What is the difference between DELETE and TRUNCATE in SQL?
What is the difference between UNION and UNION ALL in SQL?
Explain Java 8 features
Explain the Factory design pattern.
Explain Java OOPS concepts with code examples.
Why do we use COMMIT in SQL?
Write SQL queries using JOINs
Difference between set and tuple
What is the Virtual DOM in React?
What is the pass keyword in Python?
In which OSI layer does HTML belong?
Write an SQL query for an INNER JOIN.
What is the __init__ method in Python?
What is the difference between C++ and Java?
Explain the difference between HTTP and HTTPS
What are Primary Memory and Secondary Memory?
What is the difference between PL/SQL and SQL?
Explain method overloading and method overriding
What is the main difference between Java and C++?
What is the difference between Java and JavaScript?
Explain Object-Oriented Programming concepts in Java
Explain encapsulation and the static keyword in Java
Explain the Object-Oriented Programming (OOP) concepts.
Explain the four pillars of Object-Oriented Programming
DSA
Showing 12 of 247 reported in this area
Write a program to check whether a given string is a palindrome.
Write a program to check whether a given string or number is a palindrome.
Reverse a singly linked list.
Write a program to calculate the factorial of a number
Write a program to count the number of vowels in a given string.
Reverse a string in one line
Remove duplicates from an array
Remove duplicates from a list in one line
Write a program to find the GCD of two numbers
Write a program to generate the Fibonacci series
Write a basic program to print numbers from 1 to 10
Basic DSA problem (easy level) asked in the online test
Aptitude
Showing 3 of 92 reported in this area
In a bank there are three types of coins: 1 rupee, 3 rupee, and 5 rupee in the ratio 3:4:5. The total value is Rs 1450. Find the total number of coins.
A can do a work in 12 days and B can do the same work in 18 days. In how many days will they complete the work together?
Logical reasoning questions testing analytical thinking.
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Behavioural
Showing 3 of 45 reported in this area
Describe a recently faced difficult situation and how you handled it
Tell me an incident which shows your leadership skills.
Describe a time when you handled a conflict within a team.
Puzzles
Showing 3 of 6 reported in this area
Given expression a = 2; evaluate a * a++.
How can a biased coin be used to generate unbiased outcomes?
Solve the 3-liter and 5-liter water jug puzzle to measure a specific quantity.
System design
Showing 3 of 6 reported in this area
How does a search engine work on the front end?
How do you provide security to a web application?
How would you ensure efficient query retrieval in a graph database?
Showing 60 of 890 questions. Ranked by how often the same question came back across reports.
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What questions does Cognizant ask?
Candidate interview reports most often cover CS fundamentals (69%) and DSA (19%).
How many rounds does Cognizant interview have?
Candidate interview reports show an average of 3.0 rounds per experience, with a typical sequence of Online test → Technical → HR. Individual interview paths can vary.
Is the Cognizant interview hard?
Among questions with a reported difficulty, the mix is easy 72%, medium 27%, hard 1%.