Cognizant Programmer Analyst Interview Questions, Process, and Tips

Coding and mcq on java , spring, sql

Q1. Questions were asked from java and springboot
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Q2. What are the 4 pillars of oops
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The 4 pillars of OOP are Inheritance, Encapsulation, Abstraction, and Polymorphism.
• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation restricts access to certain components within a class, protecting the data.

• Abstraction hides the complex implementation details and only shows the necessary features.

• Polymorphism allows objects to be treated as instances of their parent class,
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Q3. Difference between spring versus spring boot
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Spring is a framework for building Java applications, while Spring Boot is an extension that simplifies the setup and development process.
• Spring is a comprehensive framework that provides various modules for building Java applications.

• Spring Boot is an extension of the Spring framework that simplifies the setup and development process by providing defaults and auto-configuration.

• Spring Boot includes embedded servers, w...read more
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Q4. What is indexing
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Indexing is a technique used to optimize the performance of databases by creating a data structure that allows for quick retrieval of data.
• Indexing involves creating a data structure that maps the values of a particular column in a database table to their corresponding rows.

• It speeds up data retrieval operations by allowing the database to quickly locate the rows that match a certain value without having to scan the en...read more
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Q5. Write to code to check string is anagram or not
Ans. 
Code to check if two strings are anagrams
• Create a function that takes in two strings as input

• Convert both strings to lowercase and remove any spaces

• Sort both strings and compare if they are equal to determine if they are anagrams

• Example: 'listen' and 'silent' are anagrams
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Q1. Python, SQL and OOPS
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Q2. Sorting techniques used
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Various sorting techniques like bubble sort, quick sort, merge sort, etc. are used in programming.
• Bubble sort - compares adjacent elements and swaps them if they are in the wrong order

• Quick sort - divides the array into two sub-arrays and recursively sorts them

• Merge sort - divides the array into two halves, sorts them, and then merges them

• Selection sort - finds the minimum element from the unsorted portion and swaps it...read more
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Basic Aptitude Questions

Q1. OOPS Concept and coding questions
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Q2. SQL coding questions
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First round is aptitude

Second was coding then after technical interview

Q1. One aptitude Question
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Q2. One simple coding question like find the frequency of arrays
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Q1. Write a reverse string program
Ans. 
A program that reverses a given string
• Create a function that takes a string as input

• Iterate through the string in reverse order and append each character to a new string

• Return the reversed string
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Q1. Write a xpath syntax using xpath by text
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XPath syntax using xpath by text
• Use the 'text()' function in XPath to select elements based on their text content

• Syntax: //tagname[text()='desired text']

• Example: //h1[text()='Hello World']
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It was of medium LOD

Q1. Basic 11-12th level coding questions were asked
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Q2. Palindrome of a number
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A palindrome of a number is a number that remains the same when its digits are reversed.
• Check if the number is equal to its reverse to determine if it's a palindrome.

• Convert the number to a string to easily reverse its digits.

• Handle negative numbers by converting them to positive before checking for palindrome.

• Examples: 121 is a palindrome, 123 is not a palindrome.
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Q3. Fibonacci series
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