Salesforce Updated CRT-450 Exam Questions and Answers by dario

 The code snippet is likely to exceed the governor limit for the total number of records retrieved by SOQL queries. In Salesforce, there is a limit on the total number of records that can be retrieved by SOQL queries in a transaction. This limit helps in preventing the overconsumption of shared resources. If a Lightning web component tries to retrieve more than 50,000 records, it will hit this governor limit1.

The code snippet has a SOQL query inside a for loop, which is a bad practice and should be avoided. The query retrieves all the lead records with the Origin_c field, regardless of whether they are related to the current component or not. This can result in a large number of records being returned, especially if the environment has more than 2,000 lead records. The query also does not use any filters or limits to reduce the number of records. The code then updates the LeadSource field of each record and performs a DML operation inside the loop, which is another bad practice and should be avoided. The DML operation can also trigger other processes, such as workflows, triggers, or validation rules, that can consume more resources and cause other governor limits to be exceeded.

A better way to write the code would be to use a list variable to store the lead records that need to be updated, and use a SOQL query outside the loop with filters and limits to retrieve only the relevant records. Then, iterate over the list and update the LeadSource field of each record. Finally, perform a single DML operation outside the loop to update the list of records. This way, the code will reduce the number of SOQL queries and DML statements, and the number of records retrieved and processed.

References:

• Apex Governor Limits | Salesforce Developer Limits and Allocations Quick Reference | Salesforce Developers
• Apex Code Best Practices | Apex Developer Guide | Salesforce Developers
• SOQL For Loops | Apex Developer Guide | Salesforce Developers

The developer should implement either a Lightning component or a Visualforce page that performs the HTTP REST callout, and use a Lightning Action or a Visualforce quick action to expose the component on the Opportunity detail page. These methods allow the developer to create a user interface that can capture the user input and trigger the callout based on a user-initiated action. The Lightning component or the Visualforce page can use the Apex controller to invoke the HTTP callout using the built-in HTTP classes, such as HttpRequest, HttpResponse, and Http. The Lightning Action or the Visualforce quick action can be added to the page layout of the Opportunity object and configured to display the component in a modal dialog or a panel.

Creating a Process Builder or an after update trigger to perform the HTTP REST callout is not a suitable method for this business requirement, because these methods do not provide a user interface or a user-initiated action. The Process Builder or the trigger would execute the callout whenever the Opportunity is updated, regardless of the user input or intention. This could result in unnecessary or unwanted callouts, as well as hitting the governor limits for callouts.

References: Invoking HTTP Callouts, Configuring an HTTP Callout Action, Create HTTP Callout for Salesforce Flow, Invoking Callouts Using Apex, [Prepare for Your Salesforce Platform Developer I Credential]

This SOQL query will get the record for the Viridian City gym and its trainers by using a subquery to fetch the related records from the Trainer_c object. The subquery uses the relationship name Trainer_c, which is the plural form of the custom object name with a suffix of __c. The main query uses the Name field of the Gym_c object to filter by the gym name. The query also uses the correct syntax for SOQL, which requires the use of the equal sign (=) for comparison operators, and single quotes (') for string literals. References: SOQL SELECT Syntax, [SOQL Relationships Between Objects], [SOQL Subquery]

https://developer.salesforce.com/docs/atlas.en-us.soql_sosl.meta/soql_sosl/sforce_api_calls_soql_relationships.htm : https://developer.salesforce.com/docs/atlas.en-us.soql_sosl.meta/soql_sosl/sforce_api_calls_soql_select_subquery.htm

 Importing data using the Data Loader and the Bulk API causes a before trigger to fire by default for Accounts. A before trigger is a type of trigger that executes before a record is saved to the database. A before trigger can be used to validate or modify the record values before they are inserted or updated1. When using the Data Loader or the Bulk API to import data, the before trigger will run for each batch of records that are processed2.

The other options are not correct because:

• Renaming or replacing picklist values does not cause a before trigger to fire, as it does not affect the record values directly. However, it may affect the validation rules or formulas that reference the picklist values3.
• Converting Leads to Contact accounts does not cause a before trigger to fire, as it is a special operation that bypasses the standard trigger execution order. Instead, the LeadConvert class can be used to override the default lead conversion process and invoke custom logic.
• Updating addresses using the Mass Address update tool does not cause a before trigger to fire, as it is a tool that allows users to update address fields on multiple records at once. However, it may cause an after trigger to fire, as it updates the records in the database.

References:

• 1: Triggers and Order of Execution
• 2: Bulk API Developer Guide
• 3: Rename or Replace Picklist Values
• : Apex Developer Guide: LeadConvert Class
• : Mass Update Addresses