Salesforce Salesforce Certifications DEX-450 Questions & Answers

• Question 261:

  A developer has the following query: Contact c = [SELECT id, firstname, lastname, email FROM Contact WHERE lastname = 'Smith']; What does the query return if there is no Contact with the last name 'Smith'?

  A. A contact initialized to null.

  B. An error that no rows are found.

  C. An empty List of Contacts.

  D. A Contact with empty values.

  Correct Answer: B

• Question 262:

  A developer needs to create a custom Visualforce button for the Opportunity object page layout that will cause a web service to be called and redirect the user to a new page when clicked. Which three attributes need to be defined in the tag of the Visualforce page to enable this functionality? Choose three answers.

  A. StandardController

  B. Extensions

  C. Action

  D. Controller

  Correct Answer: ABC

• Question 263:

  A developer writes a before insert trigger.How can the developer access the incoming records in the trigger body?

  A. By accessing the Trigger.new context variable.

  B. By accessing the Trigger.newRecords context variable.

  C. By accessing the Trigger.newMap context variable.

  D. By accessing the Tripper.newList context variable.

  Correct Answer: A

• Question 264:

  An after trigger on the account object performs a DML update operation on all of the child opportunities of an account. There are no active triggers on the opportunity object, yet a "maximum trigger depth exceeded" error occurs in certain situation. Which two reasons possibly explain the account trigger firing recursively? choose 2 answers

  A. Changes are being made to the account during criteria based sharing evaluation

  B. Changes are being made to the account during an unrelated parallel save operation

  C. Changes to opportunities are causing cross-object workflow field updates to be made on the account

  D. Changes to opportunities are causing roll-up summary fields to update on the account

  Correct Answer: C

• Question 265:

  Which three steps allow a custom SVG to be included in a Lightning web component? Choose 3 answers A. Upload the SVG as a static resource. (Missed)

  B. Import the static resource and provide a getter for it in JavaScript. (Missed)

  C. Reference the getter in the HTML template. (Missed)

  D. Reference the import in the HTML template.

  E. Import the SVG as a content asset file.

  Correct Answer: ABC

• Question 266:

  Opportunity opp=[SELECT Id,StageName FROM Opportunity LIMIT 1]; Given the code above,how can a developer get the label for the StageName field?

  A. Call Opportunity.StageName.Label

  B. Call Opportunity.StageName.getDescribe().getLabel()

  C. Call Opp.StageName.getDescri

  D. Call Opp.StageName.Label

  Correct Answer: B

• Question 267:

  In the code below, what type does Boolean inherit from?

  Boolean b= true;

  A. Enum

  B. Object

  C. String

  D. Class

  Correct Answer: B

• Question 268:

  A developer created a helper class with a method that can be called from Visualforce pages, web services, triggers, and of even anonymous code. When the method is called from a trigger, the developer needs to execute logic that should not be executed If the method Is called from anywhere else. How can the developer determine if the code Is executed in a trigger context?

  A. Check if System.executionContext =='Trigger'.

  B. Use the executeOnTrigger annotation on the method definition.

  C. Check if Trigger.isExecuting ==true

  D. Check if Trigger.newMap !=null.

  Correct Answer: C

• Question 269:

  Which two number expression evaluate correctly? Choose 2 answers

  A. Integer I = 3.14159;

  B. Decimal D = 3.14159;

  C. Long I = 3.14159;

  D. Double D =3.14159;

  Correct Answer: BD

• Question 270:

  When are code coverage calculations updated?

  A. When unit tests are run on an organization.

  B. When changes are made to an organization's configuration.

  C. When a deployment is validated.

  D. When Apex code is saved.

  Correct Answer: A