RateGain Software Developer Intern Interview Questions and Answers

Q1. Solid Principle, Design Patterns,
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Q2. React sharing data btw siblings without any state management.
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Q3. NodeJs is single threaded then why it feels concurrent?
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Q1. Questions related micro services
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Q2. Message queue related questions
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Q3. NodeJs related questions: Event loop
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Q1. Tell us about your experience.
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Q2. In english, give me a feedback you received lately.
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Q1. Brief explanation of SOLID principles
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Q2. Ref vs out arguments
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Leet code medium level question

Q1. About Java Streams
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Q2. Restful API coding completion based on given file
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Q1. To check your attitude
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Q2. Given detailed about company and what project you are going to work on?
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Q1. Hashmap working
Ans. 
Hashmap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
• Hashmap uses a hashing function to map keys to indices in an array.

• It allows for constant time complexity O(1) for insertion, deletion, and retrieval operations.

• Example: HashMap<String, Integer> map = new HashMap<>(); map.put("key", 123); int value = map.get("key");
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Q2. Multithreading cases
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Q3. Scenario specific on how to handle multiple events on a single variable to have accurate result
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Q4. Database indexing
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Q5. Architecture level
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Q1. Two simple coding with technical questions
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Q1. One simple coding and technical questions along with system design questions
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Q1. Work experience
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Apti , html , linux ,sql, java

They give topics and we have to speak for 30 sec

Q1. How pagination work in jpa
Ans. 
Pagination in JPA allows for retrieving a subset of results from a query by specifying a limit and offset.
• Use the setFirstResult() method to specify the starting index of the results to retrieve

• Use the setMaxResults() method to specify the maximum number of results to retrieve

• Combine setFirstResult() and setMaxResults() to implement pagination in JPA queries
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Q2. How to create restful api
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To create a RESTful API, define endpoints, use HTTP methods, handle requests and responses, and follow REST principles.
• Define endpoints for different resources (e.g. /users, /products)

• Use HTTP methods like GET, POST, PUT, DELETE for CRUD operations

• Handle requests and responses in JSON format

• Follow REST principles like statelessness, uniform interface, and client-server architecture
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Q1. What is sql server agent why can't we create objects of abstract class write extension method for abstract class SQL: SP vs Function, which one is faster, why? can I call SP from Function Microservice orch...read more
Ans. 
SQL Server Agent is a job scheduling tool in SQL Server. Abstract classes cannot be instantiated. SPs are faster than functions. Microservice concepts. IEnumerable vs IQueryable.
• SQL Server Agent is a job scheduling tool in SQL Server for automating tasks like backups, database maintenance, etc.

• Abstract classes cannot be instantiated because they are incomplete and meant to be extended by subclasses.

• Extension methods ca...read more
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Q1. What is record in c# write generic method to perform summation of 2 numeric type variable (int, double, float..) write test cases for Sum method which design pattern you used
Ans. 
A record in C# is a data structure that stores a fixed number of fields of different data types.
• A record in C# is similar to a struct in C++, containing fields to store data.

• Example: 'public record Person { public string Name; public int Age; }'

• Generic method for summation: 'public T Sum(T a, T b) where T : struct, IConvertible { return Convert.ToDouble(a) + Convert.ToDouble(b); }'

• Test cases can include checking the su...read more
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Q2. This was the worst interview I have ever given. Interview got rescheduled 3 times. The panelist behaved so rudely, Why people wouldn't even care to show his face, it's literally very frustrating.
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