Salesforce Salesforce Certifications DEX-450 Questions & Answers

• Question 31:

  What is the return data type when ApexPages.currentPage().getParameters() is used to retrieve URL parameters from a visualforce controller?

  A. Map

  B. List

  C. Enum

  D. String[]

  Correct Answer: A

• Question 32:

  The Account object has a custom formula field,Level__c, that is defined as a Formula(Number) with two decimal places. Which three are valid assignments? Choose 3.

  A. Long myLevel = acct.Level__c;

  B. Object myLevel = acct.Level__c;

  C. Double myLevel = acct.Level__c;

  D. Decimal myLevel = acct.Level__c;

  E. Integer myLevel = acct.Level__c;

  Correct Answer: BCD

• Question 33:

  What is a correct pattern to follow when programming in Apex on a Multi-tenant platform?

  A. Apex code is created in a separate environment from schema to reduce deployment errors.

  B. DML is performed on one record at a time to avoid possible data concurrency issues.

  C. Queries select the fewest fields and records possible to avoid exceeding governor limits.

  D. Apex classes use the ''with sharing" keyword to prevent access from other server tenants.

  Correct Answer: C

• Question 34:

  How can a developer retrieve all Opportunity record type labels to populate a list collection? Choose 2 answers

  A. Obtain describe object results for the Opportunity objct.

  B. Write a for loop that extracts values from the Opportunity.RecordType.Name field.

  C. Use the global variable $RecordType and extract a list from the map.

  D. Write a SOQL for loop that iterates on the RecordType object.

  Correct Answer: AD

• Question 35:

  Which two statements can a developer use to throw a custom exception of type MissingFieldValueException? Choose 2 answers.

  A. Throw Exception (new MissingFieldValueException());

  B. Throw (MissingFieldValueException, 'Problem occurred');

  C. Throw new MissingFieldValueException();

  D. Throw new MissingFieldValueException ('Problem occurred');

  Correct Answer: CD

• Question 36:

  What is true for a partial sandbox that is not true for a full sandbox? Choose 2 answers:

  A. More frequent refreshes.

  B. Only Includes necessary metadata.

  C. Use of change sets.

  D. Limited to 5 GB of data.

  Correct Answer: AD

• Question 37:

  How can a developer warn users of SOQL governor limit violations in a trigger?

  A. Use ApexMessage.Message() to display an error message after the number of SOQL queries exceeds the limit.

  B. Use PageReference.setRedirect() to redirect the user to a custom Visualforce page before the number of SOQL queries exceeds the limit.

  C. Use Messaging.SendEmail() to continue the transaction and send an alert to the user after the number of SOQL queries exceeds the limit.

  D. Use Limits.getQueries() and display an error message before the number of SOQL queries exceeds the limit.

  Correct Answer: D

• Question 38:

  A developer wants to list all of the Tasks for each Account on the Account detail page. When a task is created for a Contact, what does the developer need to do to display the Task on the related Account record?

  A. Nothing. The task is automatically displayed on the Account page.

  B. Nothing. The Task cannot be related to an Account and a Contact.

  C. Create a Workflow rule to relate the Task to the Contact's Account.

  D. Create an Account formula field that displays the Task information.

  Correct Answer: A

• Question 39:

  A developer needs to avoid potential system problems that can arise in a multi-tenant architecture. Which requirement helps prevent poorty written applications from being deployed to a production environment?

  A. SOQL queries must reference sObActs with their appropriate namespace.

  B. All Apex code must be annotated with the with sharing keyword.

  C. Unit tests must cover at least 75% of the application's Apex code

  D. All validation rules must be active before they can be deployed.

  Correct Answer: C

• Question 40:

  Which two statements are true regarding formula fields? Choose 2 answers

  A. When using the and operator to concatenate strings, the result is automatically truncated to fit the destination.

  B. Fields that are referenced by formula field can not be deleted until the formula is modified or deleted.

  C. When concatenating fields, line breaks can be added to improve readability.

  D. Formula fields may reference formula field on the same object to a level of one deep.

  Correct Answer: BD