VSoft Technologies Interview Questions and Answers

Q1. Salary Expectation
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Q2. Work Experience
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Q3. Relocation Plans
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Codility Test General C# and SQL

Q1. (live coding) Create a class Employees with fields FirstName LastName, DoB, and Gender Return avg age of employees, return avg age by genders
Ans. 
Create a class Employees with fields FirstName LastName, DoB, and Gender. Return avg age of employees and avg age by genders.
• Create a class Employees with fields FirstName, LastName, DoB, and Gender

• Calculate the average age of all employees

• Calculate the average age by genders
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Q2. What design pattern you know
Ans. 
I am familiar with design patterns such as Singleton, Factory, Observer, and MVC.
• Singleton pattern ensures a class has only one instance and provides a global point of access to it.

• Factory pattern creates objects without specifying the exact class of object that will be created.

• Observer pattern defines a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and up...read more
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Q3. SOLID principles
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Q4. How to optimize SQL Queries
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Optimizing SQL queries involves using indexes, minimizing data retrieval, avoiding unnecessary joins, and optimizing query structure.
• Use indexes on columns frequently used in WHERE clauses

• Minimize data retrieval by selecting only necessary columns

• Avoid unnecessary joins by using EXISTS or IN clauses instead

• Optimize query structure by using appropriate joins and subqueries
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Q5. Which type of Indexes you know
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Types of indexes include clustered, non-clustered, unique, composite, and filtered indexes.
• Clustered index: Physically reorders the data in the table based on the index key.

• Non-clustered index: Contains a sorted list of references to the table data rows.

• Unique index: Ensures that no two rows have the same values in the indexed columns.

• Composite index: Index that is created on multiple columns.

• Filtered index: Index that...read more
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Q6. Have you ever read SQL Execution Plan?
Ans. 
Yes, I have read SQL Execution Plans to optimize query performance.
• I have analyzed SQL Execution Plans to identify bottlenecks in queries.

• I have used SQL Execution Plans to optimize query performance by understanding how the database engine executes queries.

• I have made query optimization recommendations based on SQL Execution Plans.

• I have experience with tools like SQL Server Management Studio to view and analyze Execu
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Q7. .NET Framework DI 3th party tools
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Q8. Are you familiar with MSUnit, xUnit, nUnit
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Q9. Unit Testing libraries (e.g Bogus, Moq..)
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Q1. What questions do you have?
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Q2. How was your interview's?
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Q3. Why you want to change your job?
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