XN is a security feature that is designed to prevent certain types of malware from executing in memory. When XN is enabled, the CPU will not execute code that is stored in memory regions that have been marked as XN. This can help to prevent malware from inserting itself into another process's memory location and executing from there.
No-execute (NX) is a similar security feature that is used to prevent certain types of malware from executing in memory. NX works by marking certain memory regions as non-executable, so that the CPU will not execute code from those regions.

Explanation
SQL injection is a type of vulnerability that allows an attacker to execute malicious SQL commands on a database by inserting them into an input field. The code snippet resolves this vulnerability by using parameterized queries, which prevent the input from being interpreted as part of the SQL command. Verified References: https://www.comptia.org/training/books/casp-cas-004-study-guide ,
https://owasp.org/www-community/attacks/SQL_Injection

Explanation
We recommend that you encrypt your virtual hard disks (VHDs) to help protect your boot volume and data volumes at rest in storage, along with your encryption keys and secrets. Azure Disk Encryption helps you encrypt your Windows and Linux IaaS virtual machine disks. Azure Disk Encryption uses the industry-standard BitLocker feature of Windows and the DM-Crypt feature of Linux to provide volume encryption for the OS and the data disks. The solution is integrated with Azure Key Vault to help you control and manage the disk-encryption keys and secrets in your key vault subscription. The solution also ensures that all data on the virtual machine disks are encrypted at rest in Azure Storage.https://docs.microsoft.com/en-us/azure/security/fundamentals/iaas