R1 Group DT Engineer Interview Questions and Answers

Q1. Can you provide a detailed explanation of object-oriented programming concepts?
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Q1. What is difference between function and stored procedure
Ans. 
Functions return a single value, while stored procedures can perform multiple operations and return multiple values.
• Functions return a single value, while stored procedures can return multiple values.

• Functions are called in SQL statements, while stored procedures are called using EXECUTE statement.

• Functions cannot have output parameters, while stored procedures can have output parameters.

• Functions cannot modify server ...read more
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Q2. How to implement custom exception in MVC
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Custom exceptions can be implemented in MVC by creating a new class that inherits from Exception class.
• Create a new class that inherits from Exception class

• Override the constructor to pass a custom message to the base Exception class

• Throw the custom exception in the MVC controller or service layer
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Q1. What fifo? diff btwn fifo and lifo
Ans. 
FIFO stands for First In, First Out. LIFO stands for Last In, First Out.
• FIFO is a method for organizing and manipulating a data buffer, where the first element added is the first to be removed.

• LIFO is a method where the last element added is the first to be removed.

• FIFO is like a queue, while LIFO is like a stack.

• Example: In a FIFO queue, if elements A, B, and C are added in that order, they will be removed in the same...read more
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First round was on Hacker Earth

Q1. Technical round was on Spring Data Jpa, Pagination, SOLID principles
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Q1. Basics of sql and some coding questions
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Q2. Data structures
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Q1. Putin arrays strings
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Q1. Self Introduction
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Q1. Nothing much it went well as usual they try go ask for negotiable salary
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Q2. What is the reason
Ans. 
The reason for what?
• Need more context to provide a specific reason

• Could be related to a specific action, decision, outcome, etc.

• Can you provide more details or clarify the question?
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Q3. What is the issue
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Q4. What is draw back
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A drawback is a disadvantage or limitation of a particular situation or course of action.
• Drawbacks can hinder progress or success in a project or task.

• They can be caused by limitations in resources, technology, or skills.

• Examples include lack of funding, outdated software, or inadequate training.

• Identifying drawbacks early on can help mitigate their impact on a project.
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Q5. What is fast forward
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Fast forward is a feature that allows users to skip ahead in a video or audio file to a specific point.
• Fast forward allows users to quickly move forward in a video or audio file.

• Users can skip scenes or sections they are not interested in by using the fast forward feature.

• Commonly seen in media players, streaming services, and DVRs.

• Example: Pressing the fast forward button on a remote control to skip ahead in a movie.
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1 coding question, and basic MCQ