SALESFORCE-PD1 Practice Test 2 — 30 Questions

Question 1

A developer needs to execute initialization logic as soon as a Lightning Web Component is inserted into the DOM. Which lifecycle hook should be used?

Accepted Answer

connectedCallback(). connectedCallback() is invoked when a component is inserted into the DOM, making it the standard hook for initialization logic.

Answer

renderedCallback()

Answer

disconnectedCallback()

Answer

constructor()

Question 2

Which THREE things can a developer do with the Salesforce CLI?

Accepted Answer

Query data from an org.. Option B is correct because the Salesforce CLI provides the `sf data query` (formerly `sfdx force:data:soql:query`) command, which lets a developer run SOQL queries against an org and retrieve records. Option D is correct because the CLI includes the `sf org create scratch` (formerly `sfdx force:org:create`) command, which provisions scratch orgs from a Dev Hub using a definition file or flags. Option E is correct because the CLI supports metadata deployment via `sf project deploy start` (formerly `sfdx force:source:deploy` or `force:mdapi:deploy`), pushing source or metadata components to an org. Option A is not valid because license type is an org-level setting managed through the Company Information page in Setup or via the appropriate licensing/contract process, not through the Salesforce CLI. Option C is not valid because user password resets are performed in Setup (Users) or via the System Administrator profile's reset action, not through a standard Salesforce CLI command.

Answer

Modify the Org's license type.

Answer

Update user passwords.

Question 3

Which of these is NOT a valid testing best practice?

Accepted Answer

Hard-coding record IDs.. Hard-coding data is a bad practice.

Answer

Testing for bulk records.

Answer

Using System.assertEquals.

Answer

Using @isTest.

Question 4

A developer is using 'Test.isRunningTest()' in their production code. Why is this generally considered a poor practice?

Accepted Answer

It creates different code execution paths between test and production. While sometimes necessary, relying on it can lead to code paths that are not tested in production exactly as they execute in tests.

Answer

It causes the test to fail

Answer

It causes excessive governor limit usage

Answer

It is not supported in production

Question 5

What is the primary benefit of using a Sandbox for development?

Accepted Answer

It allows development without affecting production data.. Sandboxes provide an isolated environment to prevent impact on production data or processes.

Answer

It allows access to the full production database automatically.

Answer

It increases the number of available governor limits.

Answer

It automatically deploys code to production.

Question 6

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.

Accepted Answer

Utilize Custom Settings or Custom Metadata to provide a global toggle to turn off triggers dynamically.. Option B is correct because Custom Settings or Custom Metadata can store a global bypass flag that the trigger checks before executing, allowing developers to disable trigger logic dynamically without deploying code changes, which safely breaks recursive update loops. Option D is correct because comparing Trigger.oldMap and Trigger.newMap lets the trigger verify that the fields it cares about actually changed before performing DML, so an update that does not modify relevant fields will not re-fire the same logic and cause infinite recursion. Option E is correct because a static Boolean variable in a helper class persists for the duration of a single transaction, so setting it to false after the first execution prevents the trigger from running its logic again during the same transaction's recursive DML. Option A is not appropriate because Limits.getQueries() only reports the number of SOQL queries already issued and aborting near governor limits does not logically prevent recursion. Option C is not appropriate because recursion is not an exception that can be caught; wrapping DML in try-catch does not stop the trigger from re-invoking itself.

Answer

Call Limits.getQueries() at the start of every trigger to abort if limits are near.

Answer

Wrap all DML statements in a try-catch block that catches recursion exceptions.

Question 7

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?

Accepted Answer

75%. Salesforce requires a minimum of 75% overall Apex code coverage for deployment to a production organization.

Answer

100%

Answer

50%

Answer

85%

Question 8

Which TWO tools or environments are officially supported for developing Lightning Web Components? (Choose TWO)

Accepted Answer

Visual Studio Code with the Salesforce Extension Pack. Option B is correct because Salesforce officially supports developing Lightning Web Components in Visual Studio Code using the Salesforce Extension Pack, which provides LWC-specific tooling such as syntax highlighting, code completion, and the ability to deploy and retrieve components to and from an org. Option D is correct because the Salesforce CLI (sfdx/sf) is the officially supported command-line environment for scaffolding, building, testing, and deploying LWC source, and it underpins the VS Code extensions and CI/CD workflows. The remaining options do not belong: Microsoft FrontPage 2003 (A), Eclipse with the legacy Force.com IDE v1 plugin (C), and Dreamweaver MX with custom snippets (E) are obsolete or unrelated web-authoring tools that have no official Salesforce support for LWC development.

Answer

Microsoft FrontPage 2003

Answer

Eclipse IDE with the Force.com IDE v1 plugin

Answer

Dreamweaver MX with custom snippet extensions

Question 9

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?

Accepted Answer

errorCallback. errorCallback() is invoked when a descendant component throws an error in any of its lifecycle hooks or event handlers.

Answer

catchCallback

Answer

disconnectedCallback

Answer

faultCallback

Question 10

During the Salesforce order of execution, when are validation rules evaluated relative to before triggers?

Accepted Answer

Validation rules are evaluated after all before triggers have completed execution.. Validation rules execute after the 'before' triggers have completed and modified the records, ensuring that the validated state reflects any programmatic field updates.

Answer

Validation rules execute only after after triggers complete successfully.

Answer

Validation rules are evaluated concurrently with before triggers.

Answer

Validation rules are evaluated before any before triggers execute.

Question 11

Which THREE requirements must be met when implementing a custom Lightning Web Component pagination control? Choose 3 answers.

Accepted Answer

Slice the master dataset array based on current offset and limit calculations.. Option A is correct because a custom LWC pagination control must compute the visible subset of records by slicing the master dataset array using the current offset (page number × page size) and the page size limit, since LWC has no built-in pagination primitive. Option C is correct because the Next and Previous buttons must be disabled when boundary conditions are reached — Previous at page 1 and Next at the last page — to prevent out-of-range navigation and provide correct UX. Option D is correct because the component must track the current page number and page size as reactive properties (e.g., @track or standard reactive fields) so that changes trigger re-rendering and recomputation of the sliced data. Option B is incorrect because Visualforce's standardSetController is a Visualforce/Apex construct and cannot be used inside LWC JavaScript; pagination in LWC is handled client-side or via Apex methods. Option E is incorrect because mutating the server database on every page click is unnecessary and harmful — pagination should only change the client-side view, not persist data on each navigation.

Answer

Use standard Visualforce standardSetController inside the LWC JavaScript.

Answer

Directly mutate the server database on every page click.

Question 12

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?

Accepted Answer

Database.QueryLocator start(Database.BatchableContext BC). The start method of a Database.Batchable class returns either a Database.QueryLocator or an Iterable that defines the records to be processed.

Answer

void execute(Database.BatchableContext BC, List<SObject> scope)

Answer

void finish(Database.BatchableContext BC)

Answer

Database.BatchableContext start(Database.BatchableContext BC)

Question 13

A developer needs to chain asynchronous jobs. Which interface allows for a single job to be queued from within the execution of another?

Accepted Answer

Queueable. Queueable Apex allows for chaining jobs by calling System.enqueueJob within the execute method.

Answer

Batchable

Answer

Schedulable

Answer

Future

Question 14

An enterprise application requires real-time integration where outgoing callouts must be triggered from an Apex trigger. What architectural pattern must the developer use?

Accepted Answer

Future method annotated with @future(callout=true) invoked from an after trigger.. Triggers cannot make direct synchronous callouts, so they must invoke an asynchronous mechanism like a future method with callout=true.

Answer

Batch Apex execute method without queueing.

Answer

Direct synchronous HTTP callout inside the before insert trigger.

Answer

Validation rule containing an endpoint URL.

Question 15

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?

Accepted Answer

Pass the parameter as an object with property names matching the Apex method parameters: getAccount({ accountId: recordId }). When invoking an Apex method imperatively from LWC, parameters must be passed as a single object where the keys match the Apex method parameter names exactly. For an Apex method like getAccount(Id accountId), the JavaScript call should be getAccount({ accountId: recordId }). This ensures the correct mapping of values to parameters.

Answer

Pass the parameter as a positional string argument: getAccount({recordId})

Answer

Bind the parameter using the @api decorator inside the JavaScript function body.

Answer

Assign the parameter to the window.apexParams object prior to invocation.

Question 16

Which trigger context variable should a developer use to access the map of old record versions prior to the update operation?

Accepted Answer

Trigger.oldMap. Trigger.oldMap provides a map of IDs to the old versions of the SObject records for update and delete triggers.

Answer

Trigger.old

Answer

Trigger.newMap

Answer

Trigger.new

Question 17

A developer implements a Queueable class that makes callouts and needs to test it using Test.startTest() and Test.stopTest(). When does the asynchronous queueable job execute during a unit test?

Accepted Answer

When Test.stopTest() is executed.. Asynchronous code executed inside Test.startTest() and Test.stopTest() runs synchronously when Test.stopTest() is called.

Answer

At the end of the test method automatically without stopTest.

Answer

Immediately when enqueued.

Answer

Only when explicitly mocked via HttpCalloutMock.

Question 18

Which TWO features of @isTest(SeeAllData=true) should a developer be aware of?

Accepted Answer

It makes tests results dependent on the org's existing data.. It grants access to all org data and can lead to unexpected test results.

Answer

It speeds up test execution.

Answer

It is required for testing standard objects.

Answer

It ignores all governor limits.

Question 19

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?

Accepted Answer

Tests tab. The Tests tab in the Developer Console displays test execution status, test results, and code coverage percentages by class.

Answer

Query Editor tab

Answer

DOM Inspector tab

Answer

Logs tab

Question 20

A developer creates a parent Lightning Web Component containing a child component. The parent needs to call a public method defined inside the child component. How is this accomplished?

Accepted Answer

Use this.template.querySelector('c-child-component').publicMethodName() in the parent component.. In LWC, a parent can call a public method on a child component by querying the child element from the parent's template and invoking the method directly. The child must expose the method with the @api decorator, and the parent uses this.template.querySelector('c-child-component') to obtain the element reference, then calls the method on it. This is the documented pattern for parent-to-child method invocation.

Answer

Use the publish() method of the Lightning Message Service.

Answer

Update a shared reactive property passed down via @api.

Answer

Dispatch an event from the parent and listen to it in the child component.