Cognizant Interview Questions, Process, and Tips

English, Quants, logical reasoning

Q1. Pattern, oops concept, basic sql query
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Q2. Second highest salary in database
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Q3. Compile time polymorphism vs runtime polymorphism
Ans. 
Compile time polymorphism is method overloading while runtime polymorphism is method overriding.
• Compile time polymorphism is resolved at compile time while runtime polymorphism is resolved at runtime.

• Method overloading is an example of compile time polymorphism while method overriding is an example of runtime polymorphism.

• Compile time polymorphism is faster than runtime polymorphism as it is resolved at compile time.

• Ru...read more
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Q4. 4 pillars of object oriented programming
Ans. 
The 4 pillars of OOP are Abstraction, Encapsulation, Inheritance, and Polymorphism.
• Abstraction: Hiding implementation details and showing only necessary information.

• Encapsulation: Binding data and functions together to protect data from outside interference.

• Inheritance: Creating new classes from existing ones, inheriting properties and methods.

• Polymorphism: Using a single interface to represent multiple types of object
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Q5. Why is java platform independent
Ans. 
Java is platform independent due to its bytecode and JVM.
• Java code is compiled into bytecode which is platform-neutral.

• JVM (Java Virtual Machine) interprets the bytecode and executes it on any platform.

• JVM acts as an abstraction layer between the code and the underlying hardware.

• This allows Java programs to run on any platform that has a JVM installed.

• For example, a Java program written on a Windows machine can run on
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It was quantitative and language test.

Q1. Asked about sql queries and final year school project
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Algebra, allegation Mixture, probability, Speed time distance and so on.

2 questions:
1 from matrix (Array) Transform
2 from data structure

Q1. Tell me about yourself briefly.
Ans. Hello Mr. ABC, My name is Arnab Singh from Pune. I completed my graduation from [college name] in B.tech (CSE). I am interested to join your organization to update my knowledge and benefits your organization with my skills.
Answered by sharpalbert
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Q2. Are you able to work in flexible night shifts?
Ans. Sorry, because I have medical issue to work in night and it disturb my sleeping cycle it causes illness.
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Aptitude test and reasoning test

Algorithms and sorting arrays etc

Q1. They will ask the questions on skills mentioned in the resume. And may ask some basic programming questions also and this will be depends on interviewer
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Q1. Asked to write arrays in structure
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Q2. Swapping of two variables without using temporary variables
Ans. 
Swapping two variables without using temporary variables.
• Use arithmetic operations to swap values

• X = X + Y

• Y = X - Y

• X = X - Y
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Q3. Asked questions related to aptitude
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