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10+ Credera Interview Questions and Answers

Updated 24 Feb 2025

Q1. Explain each concept with real life example?

Ans.

Explanation of concepts with real-life examples

  • Abstraction: Using a TV remote without knowing the internal circuitry

  • Encapsulation: A car driver only needs to know how to drive, not how the engine works

  • Inheritance: A child inheriting traits from their parents

  • Polymorphism: A shape can take on different forms, such as a square or a triangle

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Q2. What all the methods we have in API?

Ans.

The question is too broad to provide a specific answer.

  • APIs can have various methods such as GET, POST, PUT, DELETE, etc.

  • The methods in an API depend on the specific API being referred to.

  • Examples of API methods include 'getUser', 'createOrder', 'updateProfile', etc.

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Q3. Suppose you are allocated into two projects in one day, and ETA for both is same, how would you complete them at the given deadline?

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Q4. What problems you have faced during testing?

Ans.

I have faced issues with compatibility, performance, and user acceptance testing.

  • Compatibility issues with different browsers and operating systems

  • Performance issues with large datasets and high traffic

  • User acceptance testing revealed unexpected user behavior

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Q5. What is system testing

Ans.

System testing is the process of testing the complete and integrated software system to evaluate its compliance with specified requirements.

  • System testing is performed on the entire software system as a whole.

  • It is conducted after integration testing and before acceptance testing.

  • The main goal of system testing is to ensure that the software meets the specified requirements and functions correctly in the intended environment.

  • Examples of system testing include performance test...read more

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Q6. What are Solid Principle?

Ans.

SOLID principles are a set of five design principles for writing maintainable and scalable software.

  • S - Single Responsibility Principle

  • O - Open/Closed Principle

  • L - Liskov Substitution Principle

  • I - Interface Segregation Principle

  • D - Dependency Inversion Principle

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Q7. Difference between Sync and Async?

Ans.

Sync is blocking, while Async is non-blocking.

  • Sync operations block the execution of the program until the operation is completed.

  • Async operations allow the program to continue executing while the operation is being completed in the background.

  • Sync operations are simpler to implement and reason about, but can lead to performance issues.

  • Async operations require more complex code, but can improve performance and responsiveness.

  • Examples of Sync operations include reading a file ...read more

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Q8. Explain about MVC Routing?

Ans.

MVC Routing is a mechanism to map incoming requests to specific controller actions.

  • Routing is used to define URL patterns and map them to specific actions in the controller.

  • It helps to create clean and SEO-friendly URLs.

  • Routing can also be used to pass parameters to the controller action.

  • MVC Routing is a part of the ASP.NET framework.

  • Example: RouteConfig.cs file in ASP.NET MVC application defines the routing rules.

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Q9. Polymorphism real life example

Ans.

Polymorphism is the ability of an object to take on many forms. A real-life example is a vehicle.

  • Polymorphism allows a vehicle object to take on different forms such as car, truck, or motorcycle

  • Each form has its own unique properties and methods, but they all share common characteristics such as having wheels and an engine

  • Polymorphism allows for more efficient and flexible code as it allows for the use of a single class to represent multiple objects

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Q10. Integration if you have done

Ans.

I have experience with integrating various systems and technologies to streamline processes and improve efficiency.

  • Implemented API integrations between CRM and marketing automation platforms

  • Developed custom middleware to connect legacy systems with modern applications

  • Utilized ETL tools to integrate data from multiple sources into a centralized database

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Q11. Speak about the word state for 2 minutes

Ans.

The word state can refer to a condition, a political entity, or a stage in a process.

  • State can refer to the condition or status of something, such as the state of a machine or the state of a person's health.

  • State can also refer to a political entity, such as a nation-state or a state within a country.

  • State can indicate a stage in a process, such as the state of a project or the state of an experiment.

  • State can also refer to a mental or emotional condition, such as a state of ...read more

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Q12. Rotate a matrix

Ans.

Rotate a matrix by 90 degrees clockwise

  • Transpose the matrix

  • Reverse each row of the transposed matrix

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Q13. What is join in SQL

Ans.

Join in SQL is used to combine rows from two or more tables based on a related column between them.

  • Join is used to retrieve data from multiple tables in a single query

  • Types of joins include inner join, left join, right join, and full outer join

  • Join conditions are specified using the ON keyword and a related column between the tables

  • Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column

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