SALESFORCE-PD1 Practice Questions 2 — 50 Questions

Question 1

Which TWO tools or features are part of the Model-View-Controller (MVC) architecture implementation in Salesforce declarative and programmatic development? Choose 2 answers.

Accepted Answer

Lightning Web Components and Visualforce pages. Custom objects/database tables represent the Model, and Lightning components/Visualforce pages represent the View.

Answer

Profiles and Permission Sets

Answer

Salesforce Sharing Rules

Answer

Governor Limits

Question 2

A developer creates a custom Lightning Web Component that includes a wired property to retrieve account records. The component needs to react dynamically when the record data is updated via another component on the page. Which decorator should be used on the JavaScript property to receive reactive updates?

Accepted Answer

@wire. The @wire decorator in Lightning Web Components provisions a stream of data to a property or function reactively.

Answer

@api

Answer

@track

Answer

@readonly

Question 3

A developer has written an Apex method that executes a SOQL query to retrieve all Contacts associated with an Account. The method needs to be invoked securely without bypassing the user's organization-wide defaults and sharing settings. How should the developer execute this query?

Accepted Answer

Define the class using the 'with sharing' keyword.. By default, SOQL queries executed in Apex enforce user-level sharing rules unless the 'with sharing' keyword is explicitly omitted in a 'without sharing' class context.

Answer

Include the 'WITH SECURITY_ENFORCED' clause in the SOQL query.

Answer

Execute the query within a @future method.

Answer

Use the Schema.describeSObjects method before querying.

Question 4

Which THREE data types are primitive data types supported in Apex? (Choose three.)

Accepted Answer

Boolean. Apex supports standard primitive types including Boolean, Integer, and String.

Answer

WorkflowRule

Answer

LightningComponent

Question 5

A developer needs to check if a specific key exists in a Map<String, Decimal> before retrieving its value. Which Map method should be used?

Accepted Answer

containsKey(). The containsKey() method checks whether a specified key exists in a Map instance.

Answer

hasKey()

Answer

contains()

Answer

exists()

Question 6

When should a developer choose a Record-Triggered Flow over an Apex trigger for automating record updates before save?

Accepted Answer

When updating fields on the same record being saved for better performance and maintainability.. 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.

Answer

When the automation requires complex external web service callouts.

Answer

When handling recursive trigger execution across multiple custom objects.

Answer

When performing complex DML operations on up to five related child objects.

Question 7

A developer needs to assign a default value to a custom picklist field via Apex when creating a Lead record. What data type should be assigned to the picklist field in Apex?

Accepted Answer

String. Picklist fields in Salesforce are represented as Strings in Apex when assigned or retrieved via sObjects.

Answer

Boolean

Answer

PicklistEntry

Answer

Integer

Question 8

What is a key advantage of using Queueable Apex over future methods?

Accepted Answer

Queueable Apex allows passing sObjects and custom Apex types as member variables.. Queueable Apex supports non-primitive data types and job chaining.

Answer

Queueable Apex executes synchronously on the user thread.

Answer

Queueable Apex has no governor limits.

Answer

Queueable Apex cannot make callouts.

Question 9

A developer has a Queueable Apex job that needs to query large volumes of data and perform updates. To optimize performance and avoid heap size limits, what is the best practice when querying records inside a Queueable Apex job?

Accepted Answer

Implement the Database.Batchable interface instead of Queueable.. Querying records using a SOQL Query Locator inside a batch or leveraging iterable queries helps manage memory efficiently, but for Queueable jobs, querying using SOQL for loops or batching ids helps avoid heap limits.

Answer

Assign all queried records to a single global List variable in the class.

Answer

Set the method execution context to read-only using @ReadOnly.

Question 10

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?

Accepted Answer

Field-level security settings on profiles are sometimes omitted or overridden if the target profile already exists and has conflicting security configurations.. 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.

Answer

Unmanaged change sets require manual XML editing prior to upload.

Answer

Change sets do not support the deployment of custom fields under any circumstances.

Answer

Profiles cannot be included in outbound change sets.

Question 11

Which THREE features are supported in Salesforce scratch orgs? (Choose three.)

Accepted Answer

Installing unlocked and managed packages for testing.. Scratch orgs support source tracking, custom configurations, and feature activation.

Answer

Permanent production status with unlimited user licenses.

Answer

Directly modifying standard Salesforce platform source code.

Question 12

A developer needs to process 2 million records asynchronously, performing complex calculations and updating parent records in batches of 2,000. Which feature should the developer implement?

Accepted Answer

Batch Apex. Batch Apex is designed for processing large datasets in chunks asynchronously.

Answer

Queueable Apex

Answer

Future methods

Answer

Scheduled Apex

Question 13

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 14

Which method is used in an Apex trigger to display a custom error message on a specific record during a before insert event?

Accepted Answer

addError(). The addError() method on an sObject instance prevents the DML operation and displays an error message.

Answer

throw new TriggerException()

Answer

ApexPages.addMessage()

Answer

rejectRecord()

Question 15

A developer has a trigger that updates parent Account records when Child Contacts are modified. To prevent infinite recursion, the developer uses a static boolean variable in a helper class. What is a key limitation of using static variables for recursion control in Salesforce?

Accepted Answer

Static variables reset at the end of each transaction, and do not protect against separate transactions or certain bulk test setups.. Static variables persist only for the duration of a single transaction; if a secondary transaction or test context restarts, the static variable resets.

Answer

Static variables persist across multiple user transactions, causing triggers to never fire again.

Answer

Static variables cause governor limit exceptions on heap size.

Answer

Static variables are prohibited in trigger helper classes.

Question 16

Which TWO circumstances will cause an Apex unit test method to fail? (Choose two.)

Accepted Answer

A System.assert() or Assert.areEqual() statement evaluates to false.. Uncaught exceptions and failed system assertions cause test method failures.

Answer

The test method executes in read-only mode.

Answer

The test class code coverage is exactly 75%.

Answer

The test method finishes executing with zero assertions.

Question 17

A developer needs to invoke a long-running external web service callout from an existing scheduled Apex job that implements the Schedulable interface. What is the correct approach to implement this callout?

Accepted Answer

Enquie a Queueable Apex class that implements Database.AllowsCallouts from within the Schedulable execute method.. Schedulable Apex cannot directly make synchronous callouts because the thread must wait for the network response. Developers must chain a Queueable class that implements Database.AllowsCallouts.

Answer

Mark the Schedulable execute method with the @future(callout=true) annotation.

Answer

Implement Database.AllowsCallouts directly in the Schedulable class and execute the callout inside the execute method.

Answer

Invoke the external web service using a standard synchronous SOQL statement.

Question 18

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 19

A developer is writing an Apex test class and needs to reset governor limits before executing a block of asynchronous code testing. Which method should the developer use?

Accepted Answer

Test.startTest(). Test.startTest() and Test.stopTest() bracket the test section, resetting governor limits for the execution block within them and forcing any asynchronous calls to run synchronously.

Answer

Test.resetLimits()

Answer

Test.runAs()

Answer

Limits.reset()

Question 20

A developer wants to ensure that specific test data is available to all test methods in a class without recreating it. Which method should be used?

Accepted Answer

Use @testSetup.. @testSetup methods are executed once per class and set up data for all methods.

Answer

Use a static constructor.

Answer

Use a private method called by all tests.

Answer

Use Test.loadData().