493 questions total · 7pages · All types, answers revealed
When a record-triggered flow performs an action that causes a trigger to fire, which order of execution phase is this?
Salesforce re-enters the order of execution.
Why this answer
This is part of the re-entrant execution, where Salesforce processes the trigger as part of the flow's transaction.
A developer creates a Lightning Web Component that consumes data from a wire adapter. The wire adapter returns an object with 'data' and 'error' properties. What is this pattern called in LWC?
Wire results provide data and error properties.
Why this answer
Wire adapters return a wrapper object containing data and error properties.
Which context variable should a developer use in an Apex trigger to determine if the trigger was fired by an update operation rather than an insert?
Trigger.isUpdate is the correct boolean context variable for update operations.
Why this answer
Trigger.isUpdate returns true if the trigger was fired due to an update operation.
A developer is building a Lightning Web Component that must be made available for use on Lightning Record Pages. Which configuration tag must be included in the component's metadata file?
Correct. lightning__RecordPage makes the component available for placement on record pages in Lightning App Builder.
Why this answer
To expose a component on a record page, the targets list must include lightning__RecordPage.
Which THREE items are best practices when setting up test data using @TestSetup methods? (Choose three.)
@TestSetup runs once per class, preserving governor limits for test methods.
Why this answer
Test setup methods create shared records efficiently and roll back per method.
Which THREE data types are primitive data types supported in Apex? (Choose three.)
Boolean is a primitive data type in Apex.
Why this answer
Apex supports standard primitive types including Boolean, Integer, and String.
Which log level displays the most information?
Most detailed level.
Why this answer
FINEST is the most granular log level available.
A developer is writing a Lightning Web Component and needs to conditionally render a block of HTML markup based on a boolean property named 'isVisible'. What is the correct syntax in the HTML template?
Correct because template with if:true is the standard conditional rendering directive.
Why this answer
Conditional rendering in LWC uses the l:if directive or template conditional directives. Wait, the correct directive is lwc:if.
Which THREE things can a developer do with the Salesforce CLI?
Core CLI feature.
Why this answer
The CLI supports org management, code deployment, and data management.
Which tool is best suited for running all tests in an org and viewing the code coverage percentages?
The Developer Console is the primary tool for testing and coverage analysis.
Why this answer
The Developer Console provides a built-in interface to run tests and view code coverage immediately.
Which of these is NOT a valid testing best practice?
This is a bad practice.
Why this answer
Hard-coding data is a bad practice.
When testing asynchronous Apex, how do you ensure that the scheduled job has finished before asserting results?
Test.stopTest() executes all asynchronous operations queued during the test.
Why this answer
Test.stopTest() forces any asynchronous processes, such as @future or Schedulables, to execute before the code execution continues.
A developer is writing a test class for an Apex trigger and needs to insert test Account records. Best practices recommend bypassing hardcoded IDs. Which annotation should be placed on the test setup method to create common test data efficiently?
@TestSetup methods are executed once per test class and roll back data between test method executions.
Why this answer
The @TestSetup annotation allows developers to create test records once and make them available for all test methods in the class.
What is the primary benefit of using a Sandbox for development?
Provides a safe environment for testing.
Why this answer
Sandboxes provide an isolated environment to prevent impact on production data or processes.
A developer is troubleshooting an Apex trigger recursion issue where an update operation triggers itself infinitely. Which THREE strategies can the developer use to safely prevent this recursion? Choose 3 options.
Dynamic kill-switches allow administrators or developers to disable faulty or recursive triggers instantly.
Why this answer
Trigger recursion can be prevented using static boolean flags in a helper class, utilizing trigger context maps to check if specific fields actually changed, or leveraging custom metadata/settings to disable triggers dynamically.
A developer encounters a 'System.AsyncException: Maximum queueable jobs added to the queue' error. What caused this exception?
Adding more than 50 queueable jobs in a single transaction throws this exception.
Why this answer
Exceeding the limit of 50 queued jobs added to the flex queue in a single transaction triggers this AsyncException.
A developer receives a System.LimitException: Too many SOQL queries: 101 when running a complex unit test. The test class inserts a large volume of test records that inadvertently cause a trigger to execute multiple queries inside a loop. What is the most effective way to reset the governor limits specifically for the code being tested?
Test.startTest and Test.stopTest reset governor limits so that heavy test setup data generation does not count against the tested code limits.
Why this answer
Test.startTest() resets all governor limits for the code executed immediately following it, up until Test.stopTest().
A developer needs to catch unhandled JavaScript errors in a Lightning Web Component hierarchy so the entire app doesn't crash. Which lifecycle hook handles errors thrown by descendant components?
Catches errors from child components.
Why this answer
errorCallback() is invoked when a descendant component throws an error in any of its lifecycle hooks or event handlers.
A developer needs to verify code coverage across an entire Apex organization before deploying code to production. What is the minimum overall Apex code coverage required by Salesforce for production deployment?
Salesforce requires at least 75% of all Apex code in the org to be covered by unit tests.
Why this answer
Salesforce requires a minimum of 75% overall Apex code coverage for deployment to a production organization.
Which governor limit applies to the total CPU time in a single synchronous Apex transaction?
10,000 ms is the synchronous CPU time limit.
Why this answer
The synchronous CPU time limit is 10,000 milliseconds (10 seconds).
Which THREE requirements must be met when implementing a custom Lightning Web Component pagination control? Choose 3 answers.
Slicing arrays displays the correct subset for the page.
Why this answer
Custom pagination requires managing current page state, calculating total pages, and updating displayed subsets of data reactively.
A developer is using Salesforce CLI to create a temporary environment for feature development and testing that includes all source code and shape settings. Which CLI command should the developer use to create this temporary environment?
sf org create scratch creates a source-tracked scratch org using a project-scratch-def.json file.
Why this answer
sf org create scratch creates a scratch org based on a definition file.
A developer is implementing a Batch Apex class to process 500,000 Contact records. Which method defines the starting point and retrieves the records to be processed?
QueryLocator is the standard and most efficient way to fetch records for batch processing.
Why this answer
The start method of a Database.Batchable class returns either a Database.QueryLocator or an Iterable that defines the records to be processed.
Which TWO actions should a developer take when handling errors returned by an imperative Apex call in a Lightning Web Component? Choose 2 answers.
Standard Salesforce error body structure format.
Why this answer
Errors from imperative Apex should be caught in a .catch() block and processed or displayed using a toast notification or error banner.
A developer needs to chain asynchronous jobs. Which interface allows for a single job to be queued from within the execution of another?
Queueable Apex supports chaining through System.enqueueJob.
Why this answer
Queueable Apex allows for chaining jobs by calling System.enqueueJob within the execute method.
A developer runs unit tests in the Developer Console and notices that one test method fails when run as part of the entire test class, but passes successfully when run in isolation. What is the most likely cause of this issue?
Shared state and lack of data isolation between methods in the same class can cause dependent test failures.
Why this answer
Test pollution occurs when test data modified or created by one test method is not properly cleaned up, affecting subsequent test methods.
A developer is using 'Test.isRunningTest()' in their production code. Why is this generally considered a poor practice?
It is better to avoid conditional logic that changes runtime behavior based on test context.
Why this answer
While sometimes necessary, relying on it can lead to code paths that are not tested in production exactly as they execute in tests.
A developer is creating a reusable LWC utility and needs to invoke an Apex method imperatively. The method accepts a record ID parameter. What is the correct way to pass this parameter in JavaScript?
Correct because imperative Apex requires an object parameter mapping.
Why this answer
Imperative Apex methods accept an object whose properties match the parameter names expected by the Apex method signature.
An Apex trigger performs a callout to an external web service and a developer is writing a unit test for this trigger. How should the developer handle the callout during the test execution?
Test.setMock informs the runtime to return a simulated response instead of making a real callout.
Why this answer
Apex runtime throws an exception if a callout is attempted in a test without being mocked. The developer must implement the HttpCalloutMock interface and use Test.setMock().
Which trigger context variable should a developer use to access the map of old record versions prior to the update operation?
Correct. Trigger.oldMap is a map of IDs to the old version of the SObject records.
Why this answer
Trigger.oldMap provides a map of IDs to the old versions of the SObject records for update and delete triggers.
Which of the following describes the behavior of Test.stopTest()?
Main function of stopTest.
Why this answer
It executes all asynchronous code queued during the test.
Which TWO features of @isTest(SeeAllData=true) should a developer be aware of?
True, this is the main risk.
Why this answer
It grants access to all org data and can lead to unexpected test results.
A developer wants to inspect the code coverage of individual classes directly within the Salesforce Developer Console. Under which tab can the developer view this breakdown?
The Tests tab displays test suites, test runs, and code coverage metrics.
Why this answer
The Tests tab in the Developer Console displays test execution status, test results, and code coverage percentages by class.
A developer wants to ensure that a custom Apex controller method can be invoked securely from a Lightning Web Component. Which annotation must be applied to the method?
@AuraEnabled exposes Apex methods and properties to Lightning components (LWC and Aura).
Why this answer
@AuraEnabled enables methods to be called from Lightning components and can also cache data.
Which utility class is used to assert that code behaves as expected in Apex tests?
Correct method for assertions.
Why this answer
The System.assertEquals method is the standard way to verify expected outcomes.
How can a developer inspect the state of a private variable within a class during unit testing?
Safely exposes private members to tests.
Why this answer
@TestVisible allows test classes to access private variables without making them public.
A developer needs to implement a custom logging framework. Which Apex data type should be used to represent a variable that can store any primitive value, sObject, or collection dynamically?
Object is the universal superclass in Apex capable of holding any data type.
Why this answer
The Object data type is the base data type in Apex and can hold any value, including primitives, sObjects, and collections.
Which tag is used in Visualforce to embed JavaScript code directly inside the page?
Visualforce tag for including scripts.
Why this answer
<apex:includeScript> or <apex:outputPanel> can include scripts, but <apex:includeScript> links external JS files. For inline script, standard HTML <script> tag is used within Visualforce.
When should a developer use a record-triggered flow instead of a scheduled path in a flow?
Immediate record-triggered flows run synchronously right when the record is saved.
Why this answer
Record-triggered flows execute immediately upon record creation or update, whereas scheduled paths run at a specific time offset.
A developer is writing a custom wire adapter or working with custom data in LWC and needs to manually provision data or force a refresh of wire data. Which function should be imported from lightning/uiRecordApi or related wire modules?
Refreshes data obtained from an Apex wire adapter.
Why this answer
refreshApex is used to imperatively refresh data provisioned by an Apex wire adapter.
A developer implements a Batch Apex class that updates millions of records. During the execution of the execute method, a transient database error occurs on a single record. What happens to the batch job by default if Database.executeBatch is called without additional parameters?
Correct. Uncaught exceptions in a batch execution cause the transaction to fail and the entire batch job to be marked as Failed.
Why this answer
By default, if an unhandled exception occurs in a batch chunk, the entire batch job fails and the error is logged, unless Database.insert is used with allOrNone set or exception handling is implemented.
Which TWO of the following are valid ways to trigger an Apex test run?
Standard UI for running tests.
Why this answer
Tests can be run from the Developer Console and from the Apex Test Execution page.
What is the primary constraint on using @testSetup?
Correct, @testSetup must return void.
Why this answer
It cannot be used with @isTest(SeeAllData=true) in a way that allows access to existing data for setup.
You are debugging a performance issue in an Apex trigger. You want to see the database resource usage. Which debug log level should you set for the Database category?
FINEST captures the most detailed information including database performance.
Why this answer
The FINEST level for the Database category captures the most detailed information, including resource usage and DML/SOQL performance metrics.
A developer is designing a Lightning Web Component that needs to be conditionally displayed in different Salesforce containers. Which TWO targets are valid entries in the component's js-meta.xml configuration file? (Choose TWO)
Correct because lightning__HomePage targets home pages.
Why this answer
lightning__RecordPage and lightning__HomePage are valid standard targets.
What happens if a test class has a method annotated with @testSetup that fails to insert data?
Setup is a prerequisite for the class.
Why this answer
The test class setup fails, and all test methods in the class will fail to execute.
A developer needs to store a collection of unique customer email addresses in Apex and check for existence efficiently. Which collection type should the developer use?
Sets contain unique elements and offer fast lookups.
Why this answer
A Set is a collection of unique elements and provides efficient lookup using methods like contains(), making it ideal for checking existence.
When should a developer choose a Record-Triggered Flow over an Apex trigger for automating record updates before save?
Correct. Before-save flows run significantly faster than Apex triggers and provide declarative maintainability.
Why this answer
Before-save record-triggered flows execute faster than Apex before-triggers and are fully declarative, making them the preferred choice for same-record field updates.
Which trigger event handles the restoration of records from the Recycle Bin?
Salesforce provides before undelete and after undelete trigger events for restored records.
Why this answer
Undelete triggers handle records restored from the recycle bin.
A developer needs to abort a scheduled Apex job programmatically from within a test class or maintenance script. Which method should be used?
System.abortJob takes the job ID of a scheduled or flex-queue job to stop it.
Why this answer
System.abortJob(jobId) cancels a scheduled or flex-queued asynchronous job.
Which TWO best practices should developers follow when implementing Queueable Apex chaining? (Choose two.)
Each chained job runs in a new transaction, requiring proper bulkification and limit management.
Why this answer
Chaining queueable jobs should be conditional to avoid infinite loops and should monitor flex queue limits.
A developer is creating a Lightning Web Component and needs to iterate over a list of items in the HTML template. Which directive should be used?
Iterates over arrays in LWC templates.
Why this answer
for:each is the standard directive for looping in LWC templates.
A developer is deploying a profile and custom fields using an Unmanaged Change Set. Upon deployment, some custom field permissions fail to apply correctly in production. What is the most likely cause of this behavior?
Existing profiles in target orgs can cause permission merge conflicts during change set deployments.
Why this answer
Profiles and permission sets in change sets require careful component selection, and field-level security is often best handled via permission sets or post-deployment steps.
Which THREE strategies are recommended for improving the performance of Lightning Web Components rendering large lists of data? Choose 3 answers.
Helps the diff algorithm track elements efficiently.
Why this answer
Performance for large lists can be optimized by using pagination or infinite scrolling, ensuring unique stable keys in for:each loops, and avoiding complex nested getters.
An Apex trigger needs to update fields on the same record that is currently being inserted in a Before Insert trigger context. How should the developer implement this update?
Before trigger context allows direct modification of record fields in Trigger.new without DML statements.
Why this answer
In a before insert trigger, records are already in memory and have not yet been saved to the database. Developers can modify fields directly on the Trigger.new records without calling an explicit DML operation.
A developer writes an Apex trigger that performs a DML operation on Account records. The Account has a Roll-Up Summary field calculated from child Contact records. What happens during the order of execution regarding roll-up summary field calculations?
Parent roll-ups update after child changes, subsequently firing parent rules and triggers.
Why this answer
Roll-up summary fields are recalculated by Salesforce after DML operations on child records and before the transaction completes, triggering parent rules.
A developer is implementing a custom logging framework in Apex. Due to high transaction volumes, multiple asynchronous log entries need to be queued without hitting the maximum number of queueable jobs allowed in a single transaction. What is the execution limit for chained Queueable jobs?
Salesforce limits Queueable chaining such that you can only enqueue one subsequent job from executing context.
Why this answer
Queueable Apex supports chaining jobs, but synchronous transactions have strict limits on how many times a job can be chained consecutively.
A developer is working with a Lightning Web Component and needs to ensure reactive updates occur when an object property or array element changes inside a tracked property. What is the correct approach in modern LWC?
Assignment triggers reactivity by changing reference.
Why this answer
Assigning a new object or array reference (mutation via replacement) triggers reactivity in LWC tracked properties.
Which TWO actions are valid best practices when writing robust Batch Apex classes to adhere to governor limits and maintain data integrity? Choose 2 options.
Database.Stateful preserves member variable values across transactions, but should only be used when necessary as it impacts performance and memory.
Why this answer
Batch Apex classes should utilize Database.getQueryLocator for large datasets to avoid heap size limits, and stateful tracking should be minimized unless specifically required to track aggregate metrics across batches.
A batch Apex class processes 50,000 records. During the execute method, a custom governor limit is approached. Which method can the developer call to check the remaining CPU time dynamically?
Limits.getCpuTime() returns the CPU time consumed so far in the current transaction.
Why this answer
Limits.getLimitCpuTime() and Limits.getCpuTime() allow developers to monitor resource usage dynamically.
Which TWO trigger context variables are available in BEFORE INSERT triggers? Choose 2 options.
Trigger.new holds the new records being inserted.
Why this answer
Trigger.new and Trigger.newMap are available in Before Insert triggers.
A developer needs to run an Apex class in system mode, ignoring user-level object and field-level permissions, but enforcing organization-wide sharing rules. How should the class be declared?
'with sharing' enforces record-level sharing rules while Apex code otherwise runs in system mode (ignoring FLS/CRUD).
Why this answer
Declaring a class with 'with sharing' enforces sharing rules while inheriting the execution context's sharing mode, but to explicitly ignore CRUD/FLS while respecting sharing, 'with sharing' is standard, while 'without sharing' ignores sharing entirely. To enforce sharing rules while maintaining system mode for FLS, developers use specific methods or classes; however, standard class-level keywords are 'with sharing', 'without sharing', or omitting sharing keywords to inherit. Wait, system mode ignores FLS/CRUD automatically unless specified, but sharing rules are controlled by the sharing keyword.
Using 'with sharing' enforces sharing rules.
An Apex trigger needs to check whether the current user has read access to the 'AnnualRevenue' field on the Account object before performing a calculation. Which method should the developer use?
This is the correct syntax for checking field-level security readability in Apex.
Why this answer
Schema.sObjectType.Account.fields.AnnualRevenue.getDescribe().isAccessible() checks field-level security for the current user in Apex.
An enterprise application requires dynamic execution of a SOQL query where the object type and fields to query are determined at runtime based on user input. Which feature should the developer use to prevent SOQL injection vulnerabilities?
String.escapeSingleQuotes adds escape characters to all single quotation marks in a string, neutralizing SOQL injection attempts.
Why this answer
Dynamic SOQL queries must use binding variables or sanitize input using String.escapeSingleQuotes() to prevent malicious SOQL injection.
A developer is building a solution that requires complex branching logic. When should the developer choose Apex over Flow?
Apex provides a more robust environment for complex procedural logic.
Why this answer
Apex should be used when complex logic is required that cannot be represented in the Flow canvas, such as complex loops or high-performance algorithms.
Which THREE design patterns or tools help ensure secure coding practices regarding CRUD and FLS in Apex? Choose 3 options.
Strips unauthorized fields gracefully.
Why this answer
Security.stripInaccessible, WITH SECURITY_ENFORCED clause, and explicit Schema describe checks are valid methods.
A developer is implementing a Lightning Web Component that handles drag-and-drop functionality. Which native DOM event is typically intercepted to allow a drop action on an element?
Preventing default on dragover permits dropping.
Why this answer
Preventing default on dragover is required to allow a drop event to fire on an element.
Which TWO of the following statements about Trigger.new and Trigger.old are accurate?
It holds the old version of records.
Why this answer
Trigger.new is always present on insert/update; Trigger.old is always present on update/delete.
Which type of Apex trigger context variable returns a list of new versions of the sObject records?
Trigger.new holds the new record versions.
Why this answer
Trigger.new contains all the new versions of the sObject records for insert and update triggers.
When testing a trigger, why should you avoid hard-coding IDs?
Code should query for data or create it dynamically.
Why this answer
IDs are not consistent across environments, which causes tests to fail in deployment.
A developer is implementing a Visualforce page that displays a list of accounts and needs to ensure that it adheres to Salesforce security best practices by preventing cross-site scripting (XSS) attacks. Which tag or attribute combination should be used to securely output user-supplied data?
Correct. Setting escape="true" on apex:outputText ensures that user input is properly encoded to prevent XSS.
Why this answer
The apex:outputText tag automatically escapes HTML by default, preventing XSS. Alternatively, setting escape=true on bindings ensures safety.
Which trigger context variable returns a map of IDs to the new versions of the sObject records?
Trigger.newMap provides a keyed lookup of records by ID for the new state.
Why this answer
Trigger.newMap contains the map of IDs to the new versions of the sObject records, available only in update, undelete, and after insert contexts.
An Apex trigger needs to execute logic only when a specific custom field (Discount_Percent__c) on an Opportunity changes its value. Which comparison should the developer use?
Using Trigger.oldMap with record IDs is the robust way to compare old and new field values.
Why this answer
Comparing Trigger.new[i].Discount_Percent__c with Trigger.oldMap.get(Trigger.new[i].Id).Discount_Percent__c ensures code runs only when the field value is modified during an update.
Which annotation is required for a method to be recognized by the Apex test runner?
@isTest defines the class or method as a test.
Why this answer
@isTest is the required annotation for test classes and methods.
A developer needs to schedule an Apex class to run weekly. Which syntax correctly schedules the job using System.schedule?
Correct. This provides the job name, valid CRON string, and class instance.
Why this answer
System.schedule requires a job name, a valid CRON expression, and an instance of the Schedulable class.
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