Online PDI Questions Video

 Declarative development is the process of creating applications using point-and-click tools and configuration settings, without writing code. To build out the database layer for a Salesforce application, declarative developers can use the following options:

• Roll-Up Summaries: These are fields that calculate values from related records, such as the total amount of closed opportunities for an account. Roll-up summaries can be created on master-detail or lookup relationships, and can use filters to specify which records to include in the calculation1.
• Relationships: These are the links between objects that allow data to be shared and accessed across different objects. There are two types of relationships: master-detail and lookup. Master-detail relationships create a parent-child relationship between two objects, where the master record controls certain behaviors of the detail record, such as security and deletion. Lookup relationships create a loose association between two objects, where the lookup field can be optional or required, and the related record can have its own security and owner2.
• Custom Objects and Fields: These are the basic building blocks of any Salesforce application. Custom objects are the tables that store data specific to the organization or the application. Custom fields are the columns that store the attributes of each record in the object. Custom objects and fields can be created and modified using the Object Manager in Setup3.

References:

• 1: Define Roll-Up Summary Fields
• 2: Create Object Relationships
• 3: Create Custom Objects and Fields

A trace flag is a configuration that specifies the debug level, the start time, the end time, and the log type for a user, an Apex class, or an Apex trigger. The log types are DEVELOPER_LOG, USER_DEBUG, and CLASS_TRACING. A trace flag can be configured for Visualforce, Apex classes, and users to enable logging of their activities and events. For example, a trace flag can be set for a Visualforce page to capture the execution time, view state, and heap size. A trace flag can also be set for an Apex class or trigger to override the default logging level and capture more or less information. A trace flag can also be set for a user to monitor their actions and interactions with Salesforce. A trace flag cannot be configured for Process Builder or outbound messages, as they are not supported log types. References:

• TraceFlag from the Tooling API Developer Guide
• Debug Log Levels from the Salesforce Help
• Set Up Debug Logging from the Salesforce Help

 Salesforce CLI is a command-line interface that lets you run commands to create, test, and deploy Salesforce applications. You can easily integrate Salesforce CLI commands into various CI tools, such as CircleCI, Jenkins, or Travis CI, to automate testing and deployment of Salesforce applications against scratch orgs. Salesforce CLI also supports the Salesforce DX development model, which enables source-driven development, team collaboration, and agile delivery. References:

• Continuous Integration | Salesforce DX Developer Guide
• Set Up Continuous Integration for Your Salesforce Projects | Salesforce Developers Blog
• Collaborate Using Continuous Integration Unit | Salesforce Trailhead

Fast field updates record-triggered flow and account trigger are two automation tools that can be used to implement the feature of updating the Timezone field based on the postal code. A fast field update is a type of flow action that can update one or more fields on a record without using any Apex code1. A record-triggered flow can be configured to run when a record is created or updated, and can perform actions such as fast field updates, invocable actions, or subflows2. An account trigger is a piece of Apex code that can execute before or after an account record is inserted, updated, deleted, or undeleted, and can perform complex logic or callouts to external services3. Both of these tools can access the PostalCodeToTimezone_c custom object and update the Timezone field accordingly. References:

• Fast Field Updates, Trailhead module
• Record-Triggered Automation, Trailhead module
• Apex Triggers, Trailhead module