Casepoint Interview Questions, Process, and Tips

Performing CRUD operations with ADO.NET without the use of JavaScript and Angular.

Q1. SQL query and oops in depp
Ans. 
SQL query and OOPs concepts are essential for a Junior .NET Developer.
• Understand SQL queries for data retrieval, manipulation, and management.

• Learn Object-Oriented Programming principles like inheritance, encapsulation, and polymorphism.

• Practice writing SQL queries to retrieve specific data from databases.

• Implement OOPs concepts in .NET applications for better code organization and reusability.
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Q2. Explain the difference between a correlated subquery and a nested subquery.
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Correlated subquery refers to a subquery that depends on the outer query, while nested subquery is a subquery within another subquery.
• Correlated subquery is executed for each row of the outer query, while nested subquery is executed only once.

• Correlated subquery can reference columns from the outer query, while nested subquery cannot.

• Example of correlated subquery: SELECT * FROM table1 WHERE column1 = (SELECT MAX(colum...read more
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Q3. How can you identify and delete duplicate rows in a SQL table?
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Identifying and deleting duplicate rows in a SQL table can be done using SQL queries.
• Use the GROUP BY clause along with the COUNT() function to identify duplicate rows.

• Use the HAVING clause to filter out rows with a count greater than 1.

• Use the DELETE statement with a subquery to delete duplicate rows.

• Example: SELECT column1, column2, COUNT(*) FROM table_name GROUP BY column1, column2 HAVING COUNT(*) > 1;

• Example: DE...read more
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Q4. What is the purpose of indexing in a database, and what are the different types of indexes?
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Indexing in a database improves query performance by allowing faster retrieval of data.
• Indexes are used to quickly locate data without having to search every row in a table.

• Types of indexes include clustered, non-clustered, unique, and composite indexes.

• Clustered indexes physically reorder the data in the table based on the index key.

• Non-clustered indexes store a separate structure that contains the index key and a poi...read more
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Q5. How would you implement a recursive query in SQL? Provide an example.
Ans. 
To implement a recursive query in SQL, use Common Table Expressions (CTE) with a recursive part and a termination condition.
• Use a Common Table Expression (CTE) to define the recursive part of the query.

• Include a base case in the CTE to stop the recursion.

• Reference the CTE in the main query to retrieve the results.

• Example: WITH RecursiveCTE AS (SELECT * FROM TableName WHERE condition UNION ALL SELECT * FROM RecursiveCTE
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Q1. Explain polymorphism ,encapsulation ,abstraction ,interface?
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Polymorphism, encapsulation, abstraction, and interface are key concepts in object-oriented programming.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Encapsulation is the bundling of data and methods that operate on the data into a single unit.

• Abstraction involves hiding the complex implementation details and showing only the necessary features of an object.

• Interface d...read more
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Q1. You current location
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Q2. Lucknow my current location
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Q3. What is home town
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Q4. Where do you leave
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Q5. How many experience
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Consist of aptitude questios

Q1. Data Management
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Q2. Data structures
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