Free Salesforce Plat-Dev-301 Exam Questions

Become Salesforce Certified with updated Plat-Dev-301 exam questions and correct answers

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Total 455 Questions | Updated On: Apr 29, 2026

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Question 1

A developer is writing a Jest for a Lightning web component that conditionally displays child components based on a user's checkbox selections.What should the developer do to property test that the correct components display and hide for each scenario?

A : Reset the DOM after each test with the after Each method.

B : Add a teardown block to reset the DOM after each test.

C : Create a new describe block for each test

D : Create a new jsdom instance for each test

Answer: C

Question 2

What is the correct order of execution for Visualforce Page 'get' requests (initial page visit)?

A : Evaluate constructors on controller and extensions2) If there-s a < apex:form > element, create the view state3) Evaluate expressions, < apex:page > attribute actions, and other method calls (getters/setters) on main page4) Evaluate constructors, extensions, and expression on attribute definitions on any custom components present5) Send HTML to Browser

B : Evaluate constructors, extensions, and expression on attribute definitions on any custom components present2) Evaluate constructors on controller and extensions3) Evaluate expressions, < apex:page > attribute actions, and other method calls (getters/setters) on main page4) If there-s a < apex:form C> element, create the view state5) Send HTML to Browser

C : Evaluate constructors on controller and extensions2) Evaluate constructors, extensions, and expression on attribute definitions on any custom components present3) Evaluate expressions, < apex:page > attribute actions, and other method calls (getters/setters) on main page4) If there-s a < apex:form > element, create the view state5) Send HTML to Browser

Answer: C

Question 3

A developer receives a LimitException: Too many query rows: 50001 error when running code.What debugging approach using the Developer Console provides the fastest and most accurate mechanism to identify a specific component that may be returning an unexpected number of rows?

A : Count the number of Row Limit warning messages in the Debug Logs

B : Add System.debug(System.getQueryRows()) to the code to track SOQL usage

C : Filter the Debug Log on SOQL_EXECUTE_END statements to track the results of each SOQL Query

D : Use the Execution Overview to see the number of rows returned by each Executed Unit

Answer: C

Question 4

Refer to the code snippet below:When a Lightning web component is rendered, a list of opportunity that match certain criteria should be retrieved from the database and displayed to the end-user.Which three considerations must the developer implement to make the fetchOpps method available within the Lightning web component?

A : The fetchOpps method must be annotated with the %InvocableMethod annotation.

B : The fetchOpps method must specify the (continustion-true) attribute

C : The fetchOpps method cannot mutate the result set retrieved from the database.

D : The fetchOpps method must specify the (cacheable =true) attribute

E : The fecthOpps method must be annotated with the @ AuraEnabled annotation.

Answer: A,C,D

Question 5

Consider the code above.When a user dicks on the Link of a Contact's name, what happens'

A : The outputPanel refreshes, showing the Contacts details.

B : A new page opens, showing the Contact-s details.

C : The page refreshes, showing the Contact-s details.

D : Nothing happens: the commandLink is missing an action attribute.

Answer: A

Page: 1 / 91

Total 455 Questions | Updated On: Apr 29, 2026

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