Cognizant IT Infrastructure Engineer Interview Questions and Answers for Experienced

Q1. Where do we use BigInteger in java ?
Ans. 
BigInteger is used for mathematical operations involving very large integers in Java.
• BigInteger is used when the range of values supported by primitive data types like int and long is not sufficient.

• It is commonly used in cryptography and security applications.

• It provides methods for arithmetic, bitwise, and logical operations on large integers.

• Example: calculating factorial of a large number, generating large prime nu
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Q2. Merge Sort Algo code in java
Ans. 
Merge Sort Algo code in java
• Divide the array into two halves

• Recursively sort the two halves

• Merge the sorted halves

• Time complexity: O(n log n)
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1.It covers all aptitude topics, and English sentences
2.Essay writing
3.Coding

Q1. In TR , languages which u mentioned in resume they will ask Basic programing Questions on Btech project They will say one idea , we need to tell the logic how can we develop (it may varies)
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Q2. Testing questions Polymorphism, abstraction,constructors, SQL basics
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Q1. What is your family background?
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Q2. Why should we hire you?
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Q3. Tell me about yourself.
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Q4. What are your strengths and weaknesses?
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Q5. Knowledge about updated technologies
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