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20 Azure SQL Database Interview Questions and Answers

Prepare for the types of questions you are likely to be asked when interviewing for a position where Azure SQL Database will be used.

Azure SQL Database is a cloud-based relational database service provided by Microsoft. It is a fully managed platform-as-a-service (PaaS) that offers built-in intelligence capabilities, scalability, and security. If you are interviewing for a position that involves Azure SQL Database, it is important to be prepared to answer questions about your experience and knowledge. In this article, we will review some of the most common Azure SQL Database interview questions.

Azure SQL Database Interview Questions and Answers

Here are 20 commonly asked Azure SQL Database interview questions and answers to prepare you for your interview:

1. What is Azure SQL Database?

Azure SQL Database is a cloud-based relational database service that is built on top of Microsoft SQL Server. It is a fully managed database as a service that offers high availability, scalability, and security.

2. How does it work?

Azure SQL Database is a cloud-based relational database service that is built on top of Microsoft SQL Server. It provides a managed environment for running SQL Server databases, which means that Microsoft takes care of patching, backing up, and monitoring the service for you.

3. What are the different types of pricing tiers available for Azure SQL Database?

The three pricing tiers available for Azure SQL Database are Basic, Standard, and Premium. Basic is the most affordable option, while Standard is a mid-range option, and Premium is the most expensive option.

4. Can you explain the term “elasticity”? What are the advantages of elasticity in Azure SQL Database?

Elasticity is the ability to automatically scale up or down in response to changing demand. This is a key advantage of Azure SQL Database, as it allows the database to be scaled to meet the needs of the application without the need for manual intervention. This can help to save time and money, as well as ensuring that the database is always able to meet the needs of the application.

5. Is it possible to scale up or down a server in Azure SQL Database without bringing down the entire database during peak load times? If yes, then how?

Yes, it is possible to scale up or down a server in Azure SQL Database without bringing down the entire database during peak load times. This can be done by using the Azure SQL Database Elastic Pool feature, which allows you to dynamically scale your database up or down as needed.

6. What do you understand about DTU’s and eDTU’s in context with Azure SQL Database?

DTU’s (Database Transaction Units) and eDTU’s (elastic Database Transaction Units) are two different ways of measuring the performance of an Azure SQL Database. DTU’s measure the performance of the database in terms of the number of transactions that can be processed per second, while eDTU’s measure the performance in terms of the amount of CPU, memory, and storage that the database can use.

7. How do you modify data stored in an Azure SQL Database?

You can modify data stored in an Azure SQL Database using the UPDATE, INSERT, and DELETE statements.

8. Is it possible to use Transact-SQL statements to change data on an Azure SQL Database? If yes, then how?

Yes, it is possible to use Transact-SQL statements to change data on an Azure SQL Database. You can do this by using the UPDATE, INSERT, and DELETE statements.

9. Are there any differences between using T-SQL and other programming languages like C#, Java, etc.? if so, then what are they?

There are some differences between using T-SQL and other programming languages like C#, Java, etc. For example, T-SQL is a declarative language, meaning that you specify what you want the output to be, and the database engine figures out how to best execute your query. Other languages like C# and Java are imperative languages, meaning that you have to explicitly specify each step in the process. Additionally, T-SQL is optimized for working with sets of data, so it can be more efficient for tasks like data aggregation.

10. What are some common examples of data types that can be found in an Azure SQL Database?

Some common data types that can be found in an Azure SQL Database include: integers, decimals, strings, dates, and binary data.

11. How would you describe the relationship between tables and indexes in Azure SQL Database?

Tables and indexes in Azure SQL Database are related in that indexes are created on tables in order to improve query performance. Indexes can be created on one or more columns in a table, and they can be used to speed up the performance of queries that access those columns.

12. What is the best way to create a new table in an existing database?

The best way to create a new table in an existing database is to use the CREATE TABLE statement. This statement will allow you to specify the name of the new table, the columns that it will contain, and any other relevant information.

13. What are the main benefits of using Azure SQL Database over traditional databases?

Azure SQL Database offers a number of benefits over traditional databases, including the ability to elastically scale up or down as needed, pay-as-you-go pricing, built-in high availability, and more.

14. What do you think are the potential security risks associated with Azure SQL Database?

There are a few potential security risks associated with Azure SQL Database. One is that, because it is a cloud-based service, there may be less control over who has access to the data. Another is that, because it is a database service, there may be more opportunities for data breaches or SQL injection attacks.

15. What are some cases where you should avoid using Azure SQL Database?

There are a few cases where you might want to avoid using Azure SQL Database. One is if you need to use features that are not yet supported by Azure SQL Database. Another is if you have very large databases that might not perform well in the cloud. Finally, if you have special security requirements that can’t be met by Azure SQL Database, you might need to look at other options.

16. Why is it important to monitor Azure SQL Databases closely?

There are a few reasons why it is important to monitor Azure SQL Databases closely. First, Azure SQL Databases can be expensive, so you want to make sure that you are getting your money’s worth by monitoring usage and performance. Second, Azure SQL Databases are often used for mission-critical applications, so it is important to make sure that they are running smoothly and not experiencing any downtime. Finally, Azure SQL Databases can contain sensitive data, so you want to make sure that they are secure and that only authorized users have access to them.

17. Can you give me some examples of real-world applications using Azure SQL Database?

There are many real-world applications using Azure SQL Database. Some examples include:

-A social media application that needs to store user data and allow for fast retrieval and analysis
-An e-commerce application that needs to store product data and track customer orders
-A financial application that needs to store transaction data and perform complex queries for analysis

18. What are three core components of Azure SQL Database?

The three core components of Azure SQL Database are the database itself, the server that hosts the database, and the Azure SQL Database service that manages and maintains the database.

19. Can you explain what each one does?

Azure SQL Database is a cloud-based relational database service that offers high performance, scalability, and security. It is based on the Microsoft SQL Server database engine and provides all the features and benefits of SQL Server, including the ability to scale up or down as needed.

Azure SQL Database is a great choice for applications that need high performance and scalability, but do not require all the features of a full-fledged SQL Server deployment. It is also a good choice for applications that need to be able to scale up or down quickly and easily, as Azure SQL Database can be scaled up or down with just a few clicks.

20. Is it possible to access data from another cloud service using Azure SQL Database? If yes, then how?

Yes, it is possible to access data from another cloud service using Azure SQL Database. You can do this by creating a linked server inside of your Azure SQL Database. This will allow you to connect to another cloud service and query data from it as if it were a local database.

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