Explanation:

When working with encryption in Salesforce Marketing Cloud (SFMC) to store form data securely in a data extension, it's important to understand the different types of encryption methods available, especially when creating a new encryption key in Key Management.

Encryption Types Available in Key Management:

1. Asymmetric Encryption:
Asymmetric encryption uses two keys—a public key and a private key. Data encrypted with the public key can only be decrypted using the corresponding private key. This is commonly used for securely transmitting data between parties.
In the context of SFMC, Asymmetric encryption is typically used when you need to securely share data or perform operations like digital signatures.

2. RSA:
RSA is a widely used Asymmetric encryption algorithm. It's a type of public-key encryption that uses a pair of keys to encrypt and decrypt data.
In SFMC, RSA is commonly used in scenarios where data needs to be securely encrypted and decrypted.

3. Symmetric Encryption:
Symmetric encryption uses the same key for both encryption and decryption. This method is faster than asymmetric encryption but requires secure management of the key.
In SFMC, Symmetric encryption is commonly used when encrypting form data, since it's suitable for scenarios where you want to encrypt and decrypt data within the same system (e.g., storing encrypted form submissions).

Why the Other Options Are Incorrect:

A. SAML (Security Assertion Markup Language):
SAML is a standard for exchanging authentication and authorization data between parties, particularly used in Single Sign-On (SSO) scenarios. It is not an encryption method and, therefore, would not be used to encrypt data.

D. Salt:
A salt is a random value added to data before encryption (especially in password hashing) to ensure that identical data does not result in the same encrypted value. It is not a standalone encryption method but is used in combination with encryption algorithms for additional security.

Best Practice:
RSA or Asymmetric encryption can be used for encrypting data when you need public/private key pairs. Symmetric encryption is typically preferred when performance is a concern and the same system will handle both encryption and decryption.

Explanation:

In AMPscript, to perform arithmetic operations such as summing variables, you need to use the appropriate AMPscript function. The correct function for adding numbers together in AMPscript is Add(), and the syntax requires nested calls for multiple values.

Why Option B is Correct:

B. SET @total = Add(@var1, Add(@var2, @var3)):
This is the correct approach. You use Add() to sum two variables at a time. So, first, it adds @var2 and @var3, and then adds the result to @var1.

Why Not the Other Options?

A. SET @total = Sum(@var1, @var2, @var3):
Sum() is not a valid function in AMPscript. The correct function for addition is Add().

C. SET @total = Add(@var1, @var2, @var3):
The Add() function in AMPscript only supports two arguments at a time, so you cannot pass three arguments directly to the Add() function. Hence, this syntax would result in an error.

D. SET @total = @var1 + @var2 + @var3:
AMPscript does not support standard JavaScript-style arithmetic operators (e.g., +) for addition. You must use AMPscript functions like Add() for arithmetic operations.

Correct Syntax Example:

%%[
SET @var1 = 10
SET @var2 = 20
SET @var3 = 30
SET @total = Add(@var1, Add(@var2, @var3))
]%%

This will correctly sum @var1, @var2, and @var3 to evaluate to 60.

Explanation:

A. Wrapping the code in a Server-Side JavaScript Try/Catch block ✅ (Correct Answer)
✅ Server-Side JavaScript (SSJS) in Salesforce Marketing Cloud supports standard JavaScript error handling using try/catch blocks. This allows the developer to gracefully catch and handle unexpected exceptions, such as failed lookups, API errors, or null references. When an error occurs inside a try block, control immediately jumps to the catch block where the developer can log the error, notify the user with a friendly message, or take alternative action. This is a best practice when using SSJS for robust and fault-tolerant solutions.

B. Using RaiseError AMPscript function when an error occurs ❌
❌ The RaiseError AMPscript function is used to explicitly trigger an error during code execution. While it can be helpful for stopping execution when a known issue is detected, it does not handle errors gracefully—in fact, it halts processing altogether. It's useful for validation and debugging but not ideal for user-facing error handling. It does not provide the same structured control flow that try/catch offers in SSJS for catching unexpected errors and continuing execution or displaying friendly feedback.

C. Marketing Cloud automatically handles any error scenario that may occur ❌
❌ Marketing Cloud does not automatically handle all error scenarios in CloudPages or AMPscript/SSJS execution. If an error occurs, it may result in a broken page, failed script execution, or a generic error message to the user, which negatively impacts user experience. Developers must implement their own error handling logic to catch and address issues in a user-friendly way. Relying solely on the platform to handle errors is not a best practice and may lead to poor reliability and user dissatisfaction.

D. Wrapping the code in a AMPscript HandleError block ❌
❌ AMPscript does not have a HandleError block or built-in structured error handling syntax like try/catch in SSJS. AMPscript functions often return null or fail silently if something goes wrong, so developers need to manually check for conditions or use fallback values. There is no formal block to catch and handle exceptions in AMPscript. If robust error handling is required, SSJS is generally preferred for scenarios where exception management is needed.

Explanation:

In Salesforce Marketing Cloud automations, when a file is imported via a File Import Activity, and the automation is triggered by a file arriving in an SFTP folder, the substitution string that represents the name of the file triggering the automation is %%TRIGGER_FILENAME%%.

%%TRIGGER_FILENAME%% is used specifically to capture the file name of the file that triggers the automation. This string is referenced in the context of the automation step that’s processing the file.

Breakdown of other options:

A. %%FILENAME%%: This is not a valid substitution string in Marketing Cloud. It's not recognized in the context of file imports.

C. %%FILENAME_FROM_TRIGGER%%: This is not a correct substitution string either. The correct one is %%TRIGGER_FILENAME%%.

D. %%FILENAME_FROM_IMPORT%%: This does not exist in Marketing Cloud as a substitution string for importing files.

Explanation:

✅ ✔️ Correct Option: C. Put the synced records into a sendable data extension and use Contact Delete.
🔐 The Contact Delete process in Marketing Cloud is the official way to remove contacts from the All Contacts table, reducing billable contact counts. To delete contacts, marketers first place their Contact Keys (like User IDs) into a sendable Data Extension, then configure a Contact Delete operation referencing that Data Extension. This ensures records are completely removed from Contact Builder and all associated data contexts. Simply removing records from synced objects does not delete them from the All Contacts table. Therefore, Option C is correct because it follows Salesforce’s supported process for reducing billable contacts and cleaning up unintended data imports.

❌ ❌ Wrong Option: A. Update the sync to remove these contacts from the All Contacts table.
🔒 Stopping or updating a data sync only prevents new records from coming into Marketing Cloud—it does not retroactively delete already-synced contacts from the All Contacts table. Those contacts remain counted as billable until explicitly deleted. Simply disconnecting the sync leaves existing records untouched. Therefore, Option A is incorrect because it doesn’t solve the problem of existing billable contacts.

❌ ❌ Wrong Option: B. Use the REST API to delete the contacts from the All Subscribers table.
🔒 The All Subscribers table is separate from the All Contacts table in Contact Builder. Deleting from All Subscribers only affects email subscribers and does not remove contacts from the broader All Contacts table used for Contact Builder and Journey Builder. Hence, deleting subscribers alone doesn’t reduce billable contact counts for synced records. Therefore, B is incorrect for this scenario.

❌ ❌ Wrong Option: D. Use the SOAP API to delete the contacts from the All Contacts table.
🔒 There is currently no direct SOAP API operation to delete records from the All Contacts table. The Contact Delete process uses system configurations or specific REST endpoints tied to Data Extensions. Therefore, attempting to use SOAP for deleting All Contacts records will fail or is unsupported. Thus, D is incorrect.

✅ 🎯 Final Answer: C