Salesforce DEX-450 Online Practice Questions and Exam Preparation

Salesforce DEX-450 Online Questions & Answers

• Question 381:

  A developer has to Identify a method in an Apex class that performs resource intensive actions in memory by iterating over the result set of a SOQL statement on the account. The method also performs a DML statement to save the changes to the database. Which two techniques should the developer implement as a best practice to esure transaction control and avoid exceeding governor limits? Choose 2 answers

  A. Use the Database.Savepoint method to enforce database integrity. (Missed)
  B. Use the System.Limit class to monitor the current CPU governor limit consuption. (Missed)
  C. Use the @ReadOnly annotation to bypass the number of rows returned by a SOQL.
  D. Use Partial DML statements to ensure only valid data is committed.
  A. Use the Database.Savepoint method to enforce database integrity. (Missed)
  B. Use the System.Limit class to monitor the current CPU governor limit consuption. (Missed)

• Question 382:

  A developer needs to provide a way to mass edit, update, and delete records from a list view. In which two ways can this be accomplished? Choose 2 answers A. Create a new Visualforce page and Apex Controller for the list view that provides mass edit, update and delete functionality.

  B. Configure the user interface and enable both inline editing and enhanced lists.
  C. Download an unmanaged package from the AppExchange that provide customizable mass edit, update, and delete functionality.
  D. Download a managed package from the AppExchange that provides customizable Enhanced List Views and buttons
  C. Download an unmanaged package from the AppExchange that provide customizable mass edit, update, and delete functionality.

• Question 383:

  A developer is tasked to perform a security review of the ContactSearch Apex class that exists in the system. Whithin the class, the developer identifies the following method as a security threat: List performSearch(String lastName) { return Database.query('Select Id, FirstName, LastName FROM Contact WHERE LastName Like %'+lastName+'%); } What are two ways the developer can update the method to prevent a SOQL injection attack? Choose 2 answers

  A. Use variable binding and replace the dynamic query with a static SOQL. (Missed)
  B. Use the escapeSingleQuote method to sanitize the parameter before its use. (Missed)
  C. Use a regular expression expression on the parameter to remove special characters.
  D. Use the @Readonly annotation and the with sharing keyword on the class.
  C. Use a regular expression expression on the parameter to remove special characters.
  D. Use the @Readonly annotation and the with sharing keyword on the class.

• Question 384:

  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;
  B. Object myLevel = acct.Level__c;
  C. Double myLevel = acct.Level__c;
  D. Decimal myLevel = acct.Level__c;

• Question 385:

  Why would a developer use Test. startTest( ) and Test.stopTest( )?

  A. To avoid Apex code coverage requirements for the code between these lines
  B. To start and stop anonymous block execution when executing anonymous Apex code
  C. To indicate test code so that it does not Impact Apex line count governor limits.
  D. To create an additional set of governor limits during the execution of a single test class.
  D. To create an additional set of governor limits during the execution of a single test class.

• Question 386:

  What are two considerations for custom Apex Exception classes? Choose 2 answers.

  A. Custom Exceptions cannot be extended by other Exception classes.
  B. Custom Exception class names must end with the word 'Exception'.
  C. Custom Exception classes must extend the base Exception class.
  D. Constructor for custom Exceptions can only accept string values as arguments.
  B. Custom Exception class names must end with the word 'Exception'.
  C. Custom Exception classes must extend the base Exception class.

• Question 387:

  To which primitive data type in Apex is a currency field atomically assigned?

  A. Integer
  B. Decimal
  C. Double
  D. Currency
  B. Decimal

• Question 388:

  Which data structure is returned to a developer when performing a SOSL search?

  A. A list of lists of sObjects.
  B. A map of sObject types to a list of sObjects
  C. A map of sObject types to a list oflists of sobjects
  D. A list of sObjects.
  A. A list of lists of sObjects.

• Question 389:

  Which two components are available to deploy using the METADATA API? Choose 2 answers

  A. Web-to-Case
  B. Lead Conversion Settings
  C. Case Settings
  D. Web-to-Lead
  B. Lead Conversion Settings
  C. Case Settings

• Question 390:

  A developer is asked to create a custom visualforce page that will be used as a dashboard component. Which three are valid controller options for this page? Choose 3 answers

  A. Use a custom controller
  B. Use a custom controller with extensions
  C. Use a standard controller with extensions
  D. Do not specify a controller
  E. Use a standard controller
  A. Use a custom controller
  C. Use a standard controller with extensions
  E. Use a standard controller