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Cognizant
Proud winner of ABECA 2024 - AmbitionBox Employee Choice Awards
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I appeared for an interview in Oct 2024, where I was asked the following questions.
I applied via Naukri.com and was interviewed in Sep 2024. There was 1 interview round.
I appeared for an interview in Feb 2025, where I was asked the following questions.
IEnumerable is for in-memory collections, while IQueryable is for querying data from external sources like databases.
IEnumerable executes queries in memory, suitable for collections like arrays or lists.
IQueryable allows for deferred execution and can translate queries to SQL for databases.
Example: IEnumerable can be used with List<T>, while IQueryable is used with Entity Framework for database queries.
IQueryable...
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I appeared for an interview in Sep 2024.
Questions regarding Java 8, Spring Boot, and Microservices were asked.
Cognizant interview questions for designations
I applied via Naukri.com and was interviewed in Dec 2023. There were 3 interview rounds.
Entity Framework is an ORM (Object-Relational Mapping) framework for .NET applications.
ORM framework for .NET applications
Maps database tables to classes in code
Provides a way to query and manipulate data using LINQ
Supports various database providers such as SQL Server, MySQL, etc.
CTE stands for Common Table Expression in SQL, used to create temporary result sets that can be referenced within a query.
CTEs are defined using the WITH keyword
They can be recursive or non-recursive
CTEs improve readability and maintainability of complex queries
Example: WITH cte AS (SELECT * FROM table_name) SELECT * FROM cte
SOLID principles are a set of five design principles for writing maintainable and scalable object-oriented code.
Single Responsibility Principle (SRP) - a class should have only one reason to change
Open/Closed Principle (OCP) - classes should be open for extension but closed for modification
Liskov Substitution Principle (LSP) - objects of a superclass should be replaceable with objects of its subclasses without affectin...
Design patterns are reusable solutions to common problems in software design.
Design patterns provide a template for solving recurring design problems in software development.
They help in making code more maintainable, scalable, and efficient.
Examples include Singleton, Factory, Observer, and Strategy patterns.
Get interview-ready with Top Cognizant Interview Questions
I applied via Job Portal and was interviewed in Jul 2023. There was 1 interview round.
useMemo is used to memoize the result of a function, while useCallback is used to memoize a function itself.
useMemo is used to optimize expensive calculations by caching the result and returning it when the dependencies don't change.
useCallback is used to optimize the performance of child components by preventing unnecessary re-renders when the dependencies don't change.
Both useMemo and useCallback accept a dependency ...
I applied via Recruitment Consultant and was interviewed in Nov 2021. There was 1 interview round.
Singleton is a design pattern that restricts the instantiation of a class to one object. Immutable objects cannot be changed after creation.
Singleton pattern is used to ensure only one instance of a class is created and provide a global point of access to it.
Mutable objects can be changed after creation, while immutable objects cannot.
Immutable objects are thread-safe and can be shared across multiple threads without t...
I applied via Referral and was interviewed in Apr 2021. There were 3 interview rounds.
I applied via Naukri.com and was interviewed in Oct 2020. There was 1 interview round.
Second level cache is a caching mechanism used to improve performance by storing frequently accessed data in memory.
Second level cache is implemented at the application level and can be configured using frameworks like Hibernate.
To optimize SQL queries, one can use indexes, avoid using SELECT *, and use JOINs instead of subqueries.
SOLID principles are a set of design principles for writing maintainable and scalable cod...
To deploy an application in AWS, you need to create an EC2 instance, configure security groups, install necessary software, and upload your application code.
Create an EC2 instance in the desired region and select the appropriate instance type
Configure security groups to allow traffic to and from the instance
Install necessary software and dependencies on the instance
Upload your application code to the instance
Start the ...
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