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The Data Import Wizard allows importing data while adhering to Salesforce's sharing and security model.
By setting field-level security, sensitive fields can be hidden from unauthorized users.

Other Options:

Option A: Encrypting data externally is unnecessary since Salesforce has built-in security features.

Option B: Using the Data Loader with Apex adds unnecessary complexity.

Option D: The Salesforce CLI does not provide direct data import capabilities with security settings.

In Apex, a class can extend a virtual class (similar to abstract classes in Java) by using the extends keyword. This allows the subclass (CustomerOrder) to inherit properties and methods from the parent virtual class (OrderRequest).

A: Formula fields are calculated at runtime based on the formula definition and are not stored in the database.

C: Formula fields can reference fields from related objects, allowing cross-object calculations.

Why not other options?

B: Formulas cannot reference themselves; doing so would result in a circular reference error.

D: If a field used in a formula field is deleted, the formula field will break, and Salesforce will prevent deletion until the formula field is updated.

References:
Formula Fields Documentation

Salesforce requires that every trigger must have at least 1% test coverage to be deployed. Since the trigger in question has 0% test coverage, the deployment will fail even if the helper method and related classes meet the coverage requirement.

When building a Lightning Web Component (LWC) to collect and manage data, developers must ensure compliance with Salesforce's security model, including field-level security (FLS) and object-level security (OLS). To meet the requirement of respecting security controls, lightning-input-field is the correct choice.

Why lightning-input-field?

Field-Level Security (FLS):lightning-input-field respects the user's field-level security settings. This means users can only view or edit fields that they have permissions for, ensuring compliance with the
organization's security model.

Object-Level Security (OLS):It respects object-level security, ensuring users cannot access objects they are restricted from accessing.

Simplified Development:It is part of the Lightning Data Service (LDS), which eliminates the need to write custom Apex or SOQL queries for CRUD operations, reducing the potential for security gaps.

Dynamic Rendering:Since the component dynamically renders fields based on the user's permissions, developers can share the component across various user groups without additional customization.

Declarative Syntax:lightning-input-field simplifies form creation in LWC by using declarative syntax to bind to record fields directly.

Example Code Implementation:

References:
LWC Documentation for lightning-input-field Field-Level Security and Object-Level Security Best Practices for Lightning Data Service
By using lightning-input-field, the developer ensures adherence to Salesforce's security standards while providing a reusable and secure solution for capturing and displaying Contact information.

The Boolean isOK variable is declared but not initialized, meaning its value is null by default in Apex.

The code evaluates the if-else conditions in sequence:

Condition 1: isOK == false && theString == 'Hello' isOK is null, so this evaluates to false.

Condition 2: isOK == true && theString == 'Hello'

Again, isOK is null, so this evaluates to false.

Condition 3: isOK != null && theString == 'Hello' isOK is null, so isOK != null evaluates to false.

Else block: None of the above conditions are true, so the code enters the else block and sets x = 4.

References:
Apex Boolean Data Type

Many-to-Many Relationship:

To track which companies (Accounts) report which bugs and allow multiple associations for both, a junction object is needed.

This junction object will have two master-detail relationships: one to Bug__c and one to Account.

Why Not Other Options?

A. Roll-up summary field: Not suitable for many-to-many relationships.

B. Master-detail field on Bug__c to Account: Creates a one-to-many relationship, not many-to-many.

C. Lookup field on Bug__c to Account: Still creates a one-to-many relationship, not many-to-many.

Many-to-Many Relationships:
https://developer.salesforce.com/docs/atlas.en-us.object_reference.meta/object_reference/relationships_manytomany.htm

After running all tests, the Overall Code Coverage panel in the Developer Console shows the code coverage percentage for each class.

This is the most reliable and optimal way to view code coverage.

Salesforce provides describe information that allows developers to programmatically determine metadata details, including the default record type for a specific user and object. By calling SObjectType.getDescribe ().getRecordTypeInfos() and identifying the record type where isDefaultRecordTypeMapping is true, the developer can reliably retrieve the correct default record type. Hardcoding record type IDs is not recommended because IDs differ between environments. Validation rules do not provide record type information, and querying RecordType directly does not automatically account for user-specific defaults.

MVC: The Model-View-Controller design pattern is ideal for Salesforce development as it separates the business logic (model), user interface (view), and controller logic, ensuring scalability and maintainability.

Salesforce's architecture inherently supports MVC, with sObjects as the model, Visualforce or Lightning components as the view, and Apex controllers as the controller.

Why not other options?

A: The Waterfall model is a development methodology, not a design framework.

B: Flux is a front-end application architecture and not relevant to Salesforce.

D: Agile is a development methodology, not a design framework.

References:
Salesforce MVC Architecture

The upsert DML operation uses an external ID field to determine whether to insert a new record or update an existing one. Specifying Order_Number__c tells Salesforce to match records using that unique external ID. merge is used for deduplication, not external IDs, and upsert orders; without specifying the external ID
relies on record Ids instead.

An Invocable Method must be declared as global or public and static, must accept exactly one parameter of type List<T>, and must return a List<T>. When multiple output records per input are required, the correct
return type is List<List<T>>. Option D is the only option that satisfies all Invocable Method signature
requirements.

The @AuraEnabled(cacheable=true) annotation makes an Apex method available to Lightning Web Components and allows it to be wired to a property while enabling client-side caching for improved performance.

Database.insert(records, false):

The Database.insert() method with the allOrNone parameter set to false allows for partial success.

If some records in the list fail due to validation rules, triggers, or other errors, the method will still attempt to insert the remaining valid records.

The false parameter ensures that records that fail will not roll back the transaction for the others.

Why not the other options?

A. Database.insert(records, true):

The true parameter makes the operation transactional (all or none). If any record fails, all records will roll back.

B. insert records:

The insert DML statement behaves like Database.insert(records, true) by default and rolls back all records if any error occurs.

C. insert(records, false):

This syntax is invalid in Apex.

References:
Apex DML Operations Documentation
Database Methods

The deployment fails because the Apex trigger has 0% test coverage. Even though the helper class is covered, Salesforce requires at least 1% test coverage for the trigger itself. To resolve this, a test class and methods must specifically invoke the trigger by performing DML operations on the related object.

A. Roll-up summary fields can cause the parent record to go through Save:

When a roll-up summary field on a parent object (like Account) is updated due to changes in child records (like Branch), the parent record (Account) is implicitly saved again.

This can result in the execution of the trigger on the parent object. Developers must consider this behavior to avoid unintended recursion or infinite loops.

The @TestVisible annotation allows private methods or variables to be accessed from test classes without changing their access level. SeeAllData is unrelated to method visibility, test methods cannot be added to non-test Apex classes, and marking a class as global does not expose private methods.

An Invocable Method must be declared as public static. It must accept exactly one parameter of type List<T> and must return a List<T>.
Option C meets all Invocable Method signature requirements.
Option A is invalid because the parameter is not a List and the return type is not a List.
Option B is invalid because the method is not static.

Performing queries inside a loop can lead to governor limit exceptions due to too many SOQL queries in a single transaction. Instead, perform queries outside loops.

To override the Edit button in both Salesforce Classic and Lightning Experience:

Use a Visualforce page for Salesforce Classic.

Use a Lightning component for Lightning Experience by configuring the Lightning override.

A. 75% Test Coverage: Salesforce mandates that 75% of all Apex code must be covered by tests to be
deployable to production.

D. Trigger Coverage: Each Apex trigger must have at least one line of test coverage to ensure it is properly
tested.

Option A (Apex Class): Trace flags can be configured for specific Apex classes to debug issues during their execution.

Option C (User): Trace flags can be set for specific users to debug issues occurring in their transactions.

Option E (Apex Trigger): Trace flags can be set for specific triggers to debug execution.

Not Suitable:

Option B (Flow): Trace flags cannot be configured for Flows directly.

Option D (Visualforce): Trace flags are not used to debug Visualforce pages directly.

Queueable Apex provides asynchronous execution with the added benefit of job chaining, allowing one queueable job to enqueue another. This makes it more flexible than @future methods, which do not support chaining or complex job management. Batch Apex is designed for large data volumes rather than job orchestration, and Scheduled Apex focuses on timing rather than asynchronous chaining. Queueable Apex also supports callouts, making it suitable for integrations and complex processing.

When a flow runs in debug mode, Salesforce performs a rollback at the end of the debug session, so any DML changes made during debugging are not committed to the database. The other options are incorrect because debug mode does not replace elements, does not universally block callouts, and scheduled flows are simulated rather than restricted to a single record by default.

Developer Sandboxes are ideal for individual developers. They provide the same configuration as production and allow developers to work independently.

Full Sandbox: Used for staging or testing environments, not suitable for individual developer work.

Developer Edition: Not connected to the production org and lacks sandbox functionality.

Partner Developer Edition: Used by ISVs for AppExchange development, not suitable for internal teams.

References:
Salesforce Sandbox Overview

Option B: To update a junction object, the user needs Read/Write access to the primary relationship object.

Option C: The user must also have Read/Write access on the junction object itself.

C: The Bulk API is designed for importing or exporting large volumes of data and works efficiently in development environments, but it respects storage limits.

D: Developer and Developer Pro sandboxes have different storage limits. Developer Pro has a larger storage limit compared to a Developer sandbox.

Why not other options?

A: Bulk API does not bypass storage limits.

B: The Data Import Wizard is a web-based tool, not an application installed on your computer.

References:
Salesforce Data Import and Export Salesforce Bulk API

Option B: The <apex:pageMessages /> component renders all messages added to the ApexPages messages collection on a Visualforce page, including those added by the ApexPages.addMessage() method.

Not Suitable:

Option A: <apex:message> is for specific fields, not for the general messages collection.

Option C: <apex:pageMessage> is used for displaying a single, static message, not the dynamic collection
of messages.

Option D: <apex:facet> does not display messages.

Salesforce enforces strict governor limits, including limits on the number of SOQL queries that can be executed in a single transaction. When a SOQL query is placed inside a for loop that processes many records, the query may execute once per record, quickly exceeding the allowed limit. The best practice is to bulkify the trigger by moving the SOQL query outside the loop and querying all required records in a single statement. The results can then be stored in a map for efficient access during iteration.
Changing the trigger context or adding error handling does not reduce SOQL usage, and dynamic SOQL does not inherently improve governor limit compliance.

Why External ID?

The Order Number is used to identify records uniquely, both in Salesforce and in external systems.

Marking it as an External ID ensures it can be matched or referenced during data imports and integrations.

Why Unique?

Setting the field as Unique ensures that duplicate values are not allowed for the Order Number.

Why Not Other Options?

A. Indirect Lookup: Used for external object relationships, which is not applicable here.

B. Direct Lookup: Not relevant for unique field identification.

D. Lookup: Used for creating relationships, not for identifying unique fields.

External ID Field:
https://developer.salesforce.com/docs/atlas.en-us.object_reference.meta/object_reference/field_types.htm

When multiple triggers are associated with the same object and event, Salesforce does not guarantee the order of execution. This is why it is a best practice to consolidate all logic into a single trigger per object and control execution order using helper classes.

Why a Trigger on the Child Object?

Since the relationship is not master-detail, a trigger on the child object can perform aggregate calculations and update the parent Opportunity.

Why Not Other Options?

A: Tree sorting is unnecessary and unrelated to roll-up summaries.

B and D: Neither Streaming API nor Metadata API is suitable for real-time roll-up calculations.

Custom Roll-Up Summaries:
https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/
apex_triggers_best_practices.htm

The apex:includeLightning/
tag is required to load the Lightning framework when embedding Lightning components within a Visualforce page. This tag ensures that the necessary JavaScript libraries are available so that Lightning components can be instantiated and rendered correctly. The ltng:require tag is used within Aura components to load external resources, while apex:slds/ includes styling resources only. The lightning:container component is used for specific embedding scenarios and does not replace the need to include the Lightning framework.

A master-detail relationship is the correct choice when a developer needs child records to be automatically deleted when the parent record is deleted and also wants to leverage roll-up summary fields. In Salesforce, cascade delete behavior is built into master-detail relationships, meaning that child records cannot exist without a parent and are removed automatically when the parent is deleted. Additionally, roll-up summary fields are only supported on master-detail relationships, allowing the Contact record to calculate values such as count, sum, min, or max from related child records. Lookup relationships do not support roll-up summary fields and do not enforce automatic deletion unless custom logic is implemented, making them less suitable for this requirement.

Salesforce requires a minimum of 75% overall Apex code coverage across the entire organization to deploy Apex code to a production environment. This requirement ensures that the majority of the codebase is validated by automated tests, improving reliability and maintainability. Individual classes can have less than 75% coverage as long as the overall coverage meets the requirement, although it is considered a best practice to keep coverage high for each class. The platform does not enforce a 90% requirement, and coverage is not calculated strictly on a per-class basis.

Because Case and Defect__c both have Private organization-wide defaults, access to a junction object record is not automatically granted by sharing only one parent. To give a user access to a specific Case_Defect__c record, that junction object record itself must be explicitly shared. Sharing only the parent

Case or Defect__c does not guarantee access to the junction record.

Option A: The <ltng:require> tag ensures that scripts are loaded only once, even if referenced multiple
times.

Option D: The tag allows you to specify the order of scripts to ensure dependencies are loaded correctly.

Option E: Externally hosted scripts can be loaded using the scripts attribute.

Not Suitable:

Option B (Loading scripts in parallel): Scripts are loaded sequentially to ensure proper dependency handling.

Option C (Loading Files from Documents): Files must be hosted externally or in static resources, not in Documents.

To make an LWC available for use on a record page:

Target Configuration:
Add <target>lightning__RecordPage</target> in the component's .js-meta.xml file to specify where the component can be used.

Expose the Component:
Set isExposed to true in the .js-meta.xml file to make the component available for use.

Example .js-meta.xml File:

A: Incorrect placement. The <target> tag must be in the .js-meta.xml file, not the JavaScript file.

D: The <masterLabel> tag is used for metadata labeling, not for exposing or targeting a component.

Reference
LWC Metadata Configuration
https://developer.salesforce.com/docs/component-library/documentation/en/lwc/
lwc.create_metadata_config_file