Salesforce Salesforce Certifications DEX-450 Questions & Answers

• Question 301:

  Given the code block: Integer x; For(x=0;x<10; x+=2) { If(x==8) break; If(x==10) break; } System.debug(x); Which value will the system debug statement display?

  A. 2

  B. 10

  C. 8

  D. 4

  Correct Answer: C

• Question 302:

  Given the following block code: try{ List retrievedRecords = [SELECT Id FROM Account WHERE Website = null]; }catch(Exception e){ //manage exception logic }

  What should a developer do to ensure the code execution is disrupted if the retrievedRecordslist remains empty after the SOQL query?

  A. Check the state of the retrieveRecords variable and throw a custom exception if the variable is empty.

  B. Check the state of the retrievedRecords variable and use System.assert(false) if the variable is empty

  C. Check the state of the retrievedRecords variable and access the first element of the list if the variable is empty.

  D. Replace the retrievedRecords variable declaration from a List of Account to a single Account.

  Correct Answer: B

• Question 303:

  What is a valid way of loading external JavaScript files into a Visualforce page? (Choose 2)

  A. Using an (apex:includeScript)* tag. \>

  B. Using an (apex:define)* tag.

  C. Using a (link)* tag.

  D. Using a (script)* tag.

  Correct Answer: AD

• Question 304:

  A developer wrote Apex code that calls out to an external system. How should a developer write the test to provide test coverage?

  A. Write a class that extends HTTPCalloutMock.

  B. Write a class that implements the HTTPCalloutMock interface.

  C. Write a class that implements the WebserviceMock interface.

  D. Write a class that extends WebserviceMock

  Correct Answer: B

• Question 305:

  Which three statements are true regarding the @istest annotation? Choose 3 answers

  A. Products and pricebooks are visible in a test even if a class is annotated @istest (seealldata=false)

  B. A method annotated @istest (seealldata=false) in a class annotated @istest (seealladata=true) has access to all org data

  C. A method annotated @istest (seealldata=true) in a class annotated @istest (seealladata=false) has access to all org data

  D. Profiles are visible in a test even if a class is annotated @istest (seealldata=false)

  E. A class containing test methods counts toward the apex code liit regardless of any @istest annotation (Missed

  Correct Answer: BDE

• Question 306:

  A developer needs to find information about @future methods that were invoked. From which system monitoring feature can the developer see this information?

  A. Scheduled jobs

  B. Apex Jobs

  C. Background Jobs

  D. Asynchronous Jobs

  Correct Answer: B

• Question 307:

  Which two statements are acceptable for a developer to use inside procedural loops?

  A. Contact con = new Contact();

  B. ContactList.remove(i);

  C. Delete contactList;

  D. Account a = [SELECT id, Name FROM account WHERE id = : con.AccountId LIMIT 1];

  Correct Answer: AB

• Question 308:

  What are two features of Heroku Connect? Choose 2 answers

  A. Displaying data from an external data store via External Objects.

  B. Real Time Sync between Salesforce and Postgres

  C. Bidirectional syncs, allowing data to be written into Salesforce

  D. Near Real Time Sync between Heroku Postgres and Salesforce

  Correct Answer: CD

• Question 309:

  Which three resources in a Lightning Component Bundle can contain JavaScript functions? Choose 3

  A. Renderer

  B. Design

  C. Helper

  D. Controller

  E. Style

  Correct Answer: ACD

• Question 310:

  A developer is asked to write negative tests as part of the unit testing for a method that calculates a person's age based on birth date. What should the negative tests include?

  A. Assert that future dates are rejected by the method.

  B. Assert that past dates are accepted by the method.

  C. Assert that a null value is accepted by the method.

  D. Throwing a custom exception in the unit test.

  Correct Answer: A