RHA Technologies Interview Questions and Answers

MVC stands for Model-View-Controller, a software design pattern used for developing user interfaces.

• Model represents the data and business logic

• View displays the data to the user

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

• Separation of concerns allows for easier maintenance and testing

• Examples include ASP.NET MVC, Ruby on Rails, and AngularJS

State management is the process of managing and maintaining the state of an application or system.

• State management involves storing and updating data that represents the current state of an application or system.

• There are different types of state management, including client-side state management and server-side state management.

• Client-side state management involves storing state data on the client-side, typically in t...read more

Caching is the process of storing frequently accessed data in a temporary storage area for faster access.

• Caching reduces the number of requests made to the server, improving performance.

• Types of caching include browser caching, server caching, and database caching.

• Browser caching stores web page resources like images and scripts on the user's device.

• Server caching stores frequently accessed data in the server's memory.

• ...read more

Multiingule is not a known term. No extension is used for it.

• Multiingule is not a recognized term in software development.

• There is no file extension associated with multiingule.

• It is possible that the interviewer misspoke or meant to ask a different question.

The extension of a web service file is typically .wsdl or .asmx.

• The .wsdl extension stands for Web Services Description Language.

• The .asmx extension is used for ASP.NET web services.

• The extension may vary depending on the technology used to create the web service.

• Other common extensions include .svc for Windows Communication Foundation (WCF) services.

I follow a systematic approach to debug JavaScript code.

• Identify the problem area and reproduce the issue

• Use console.log() to print values and debug

• Use browser developer tools to step through code

• Check for syntax errors and typos

• Use a linter to catch common errors

• Use a debugger tool like Chrome DevTools

• Break down the code into smaller parts for easier debugging

User control is a reusable UI component that allows users to interact with an application. An extension of user control is a custom control that inherits from the user control.

• User control is a UI component that can be reused across an application

• It allows users to interact with an application

• An extension of user control is a custom control that inherits from the user control

• Custom controls can be created by adding add...read more

A cursor is a database object used to manipulate data in a result set.

• A cursor is used to traverse through a result set one row at a time.

• It allows for operations such as fetching, updating, and deleting data.

• Cursors can be either static, dynamic, or forward-only depending on their functionality.

• Example: SELECT * FROM table_name WHERE condition; DECLARE cursor_name CURSOR FOR SELECT column_name FROM table_name WHERE co...read more

An alternative to using a cursor to iterate row by row is to use a WHILE loop.

• Use a WHILE loop to iterate through rows

• Use a variable to keep track of the current row

• Exit the loop when there are no more rows to iterate through

A table type is a user-defined data type in SQL that represents a table structure.

• Table types can be used as parameters in stored procedures.

• They can be used to define temporary tables.

• Table types can be used to define table-valued parameters.

• They can be used to define table variables.

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

• Stored procedures are precompiled and stored in a database, while functions are compiled at runtime.

• Functions can be used in SQL statements, while stored procedures cannot be used in SQL statements.

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

• Functions can be called fro...read more

Transactions are a set of operations that are executed as a single unit of work.

• Transactions ensure data consistency and integrity.

• They allow for atomicity, isolation, and durability of data changes.

• Examples include transferring money between bank accounts or updating inventory levels in an e-commerce system.

Rollback should be written in the Catch block to undo the changes made in the Try block.

• Rollback should be used to undo the changes made in the Try block if an exception occurs in the Catch block.

• The Rollback code should be placed in the Catch block after the exception handling code.

• The Rollback code should be written to reverse the changes made in the Try block.

• For example, if a database transaction was started in the...read more

Temp table is a temporary table used to store data temporarily during a session.

• Temp table is created using CREATE TABLE statement with a # symbol before the table name.

• It is used to store intermediate results during complex queries.

• Temp tables are automatically dropped when the session ends or when the table is explicitly dropped.

• They can be used to improve query performance by reducing the number of joins or subqueri...read more

To create a global temp table, use ## before the table name.

• Use ## before the table name to create a global temp table.

• Global temp tables are accessible to all sessions and are destroyed when the last session using it is closed.

• Example: CREATE TABLE ##myTable (id INT, name VARCHAR(50))

Errors in SQL Server can be handled using TRY-CATCH blocks and error handling functions.

• Use TRY-CATCH blocks to catch and handle errors

• Use error handling functions like ERROR_MESSAGE(), ERROR_NUMBER(), ERROR_SEVERITY(), ERROR_STATE(), and ERROR_PROCEDURE() to get more information about the error

• Use RAISERROR() to raise custom errors