Dreamztech Solutions Interview Questions and Answers

Results are returned through Views in MVC architecture.

• In MVC, the Controller receives input and processes it, then sends data to the View for display.

• The View then renders the data and returns it as a response to the user.

• The Model contains the data and business logic, but does not directly return results in MVC.

• Examples of returning results in MVC include returning a list of products or a user profile page.

Union all combines the results of two or more SELECT statements, while union difference returns only the distinct rows from the first SELECT statement that are not in the second SELECT statement.

• Union all is used to combine the results of two or more SELECT statements into a single result set.

• Union difference is used to return only the distinct rows from the first SELECT statement that are not in the second SELECT stat...read more

Return JSON result

• Create a JSON object with key-value pairs

• Use JSON.stringify() to convert the object to a string

• Return the string as the result

Partial view is a reusable piece of a view, while view is the complete page.

• Partial view can be used in multiple views, while view is unique

• Partial view is a smaller component of a view

• View is the complete HTML page, while partial view is a part of it

MVC stands for Model-View-Controller and is a software design pattern used in web development.

• Model represents the data and business logic

• View is responsible for rendering the user interface

• Controller handles user input and updates the model and view accordingly

Stored procedures are used to perform a set of operations, while SQL functions return a single value.

• Stored procedures can have input and output parameters, while SQL functions only have input parameters.

• Stored procedures can modify data in the database, while SQL functions cannot.

• Stored procedures are precompiled and stored in the database, while SQL functions are compiled every time they are called.

• Examples of stored...read more

Index in SQL is a database object that improves the speed of data retrieval operations.

• Index is used to quickly locate data without having to search every row in a database table.

• It is created on one or more columns of a table.

• Indexes can be clustered or non-clustered.

• Clustered index determines the physical order of data in a table.

• Non-clustered index is a separate structure that contains a copy of the indexed columns ...read more

Error handling in stored procedures involves catching and handling exceptions that may occur during execution.

• Use TRY-CATCH blocks to handle errors

• Use RAISERROR to raise custom error messages

• Use SET XACT_ABORT ON to roll back transactions on error

• Log errors to a table for future reference

Knowledge of Docker and experience with MySQL/MSSQL is preferred for the Technical Leader role.

• Familiarity with Docker and containerization

• Proficiency in writing and executing SQL queries

• Understanding of database engine structures and optimization

• Experience with MySQL/MSSQL or similar relational databases

• Ability to troubleshoot and resolve database issues