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Salesforce CRT-450 Exam Syllabus Topics:
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NEW QUESTION # 136
A developer must write anApex method that will be called from a lightning component. The method may delete an Account stored in the accountRec variable.
Which method should a developer use to ensure only users that should be able to delete Accounts can successfully perform deletion?
- A. accountRec., isDeletable()
- B. Schena, sobjectType, Account, isDeletetable ()
- C. AccountRec, ObjecType, ieDeletable ()
- D. Account, isDeletable ()
Answer: B
Explanation:
the current user has the permission to delete Account records, and false otherwise. This method is part of the Schema.DescribeSObjectResult class, which provides information about the metadata and permissions of an sObject type. The other options are incorrect because they either use invalid syntax or refer to the wrong object or variable. The accountRec variable is an instance of an Account record, not an sObject type, and it does not have an isDeletable() method. The Account sObject type does not have an isDeletable() method either, it is a property of the Schema.DescribeSObjectResult class. The AccountRec.ObjectType property returns the sObject type of the accountRec variable, which is Account, but it does not have an isDeletable() method either. References:
* Schema.DescribeSObjectResult Class
* Schema.sObjectType Class
* Apex Developer Guide: Checking User Permissions
NEW QUESTION # 137
A developer wrote an Apex method to update a list of Contacts and wants to make it available for use by Lightning web components.
Which annotation should the developer add to the Apex method to achieve this?
- A.
- B.
- C.
- D.
Answer: A
NEW QUESTION # 138
A developer has a Visualforce page and custom controller to save Account records. The developer wants to display any validation rule violations to the user.
How can the developer make sure that validation rule violations are displayed?
- A. Use a try/catch with a custom exception class.
- B. Add custom controller attributes to display the message.
- C. Perform the DML using the database.unsert() method,
- D. Include <apex:messages> on the Visualforce page.
Answer: D
Explanation:
Validation Rule Violations:
Salesforce automatically throws exceptions for validation rule violations during DML operations.
<apex:messages>is used to display these errors to the user.
Why Not Other Options?
A: Controller attributes alone cannot handle validation messages.
B: A try/catch block does not address validation rule violations effectively.
D:Database.upsert()method is not related to validation error handling.
References:Apex Messages:https://developer.salesforce.com/docs/atlas.en-us.pages.meta/pages
/pages_compref_messages.htm
NEW QUESTION # 139
A developer considers the following snippet of code:
Based on this code, what is the value of x?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 140
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 a null value is accepted by the method.
- B. Assert that past dates are accepted by the method.
- C. Assert that future dates are rejected by the method.
- D. Throwing a custom exception in the unit test.
Answer: C
NEW QUESTION # 141
What are two characteristics of partial copy sandboxes versus full sandboxes? Choose 2 answers
- A. Includes a subset of metadata
- B. Requires a sandbox template
- C. Provides more data record storage
- D. Supports more frequent refreshes
Answer: A,D
NEW QUESTION # 142
A developer needs to confirm that a Contact trigger works correctly without changing the organization's data.
What should the developer do to test the Contact trigger?
- A. Use the New button on the Salesforce Contacts Tab to create a new Contact record.
- B. Use the Open Execute Anonymous feature on the Developer Console to run an "insert Contact' DML statement.
- C. Use the Test menu on the Developer Console to run oil test classes for the Contact trigger.
- D. Use Deploy from the VSCode IDE co deploy an 'insert Contact' Apex class.
Answer: C
Explanation:
TheTest menu in the Developer Consoleallows the developer to run specific or all test classes, ensuring that the trigger works correctly without affecting production data. Test methods in Salesforce run in an isolated environment and do not modify the actual data.
Why not other options?
A: Deploying code does not confirm that the trigger works correctly.
B: Creating a new Contact directly modifies production data, which is not recommended.
D: Executing a DML statement in Execute Anonymous directly affects production data and is not a safe testing method.
Testing Apex Triggers
NEW QUESTION # 143
Since Aura application events follow the traditional publish-subscribe model, which method is used to fire an event?
- A. fireEvent()
- B. registerEvent()
- C. ernit()
- D. fire()
Answer: D
NEW QUESTION # 144
A workflow updates the value of a custom field for an existing Account.
How can a developer access the updated custom field value from a trigger?
- A. By writing a Before Insert trigger and accessing the field value from Trigger.new
- B. By writing an After Insert trigger and accessing the field value from Trigger.old
- C. By writing an After Update trigger and accessing the field value from Trigger.old
- D. By writing, a Before Update trigger and accessing the field value from Trigger.new
Answer: D
NEW QUESTION # 145
What should a developer do to check the code coverage of a class after running all tests?
- A. View the Code Coverage column in the list view on the Apex Classes page.
- B. View Use cede coverage percentage for the class using the Overall Code Coverage panel in the Developer Console Tests tab.
- C. Select and run the class on the Apex Test Execution page in the Developer Console.
- D. View the Class Test Percentage tab on the Apex Class fist view m Salesforce Setup.
Answer: D
NEW QUESTION # 146
How should a developer write unit tests for a private method in an Apex class?
- A. Mark the Apex class as global.
- B. Use the @TestVisible annotation.
- C. Use the SeeAllData annotation.
- D. Add a test method in the Apex class.
Answer: B
Explanation:
The@TestVisibleannotation allows private methods or variables to be accessed in test classes. This ensures that the private method can be adequately tested without changing its access modifier.
Reference:Testing Apex Code
Below is the formatted response for the provided question, adhering to the specified format and requirements.
The question falls under the Salesforce Platform and Declarative Features topic, as it involves securing SOQL queries against injection vulnerabilities in the context of Visualforce, which is a key concept in the Salesforce Platform Developer I certification. The answer is based on official Salesforce Platform Developer I documentation, with a comprehensive explanation and references to relevant Salesforce documentation. Since the question asks for two correct answers, the response will identify both and explain why they are safe, as well as why the others are not.
NEW QUESTION # 147
Which statement describes the execution order when triggers are associated to the same object and event?
- A. Triggers are executed in the order they are created.
- B. Triggers are executed in the order they are modified.
- C. Triggers are executed alphabetically by trigger name.
- D. Trigger execution order cannot be guaranteed.
Answer: D
NEW QUESTION # 148
A developer created these three Rollup Summary fields in the custom object, Project_ct,
The developer is asked to create a new field that shows the ratio between rejected and approved timesheets for a given project.
Which should the developer use to Implement the business requirement in order to minimize maintenance overhead?
- A. Formula field
- B. Apex Trigger
- C. Process Builder
- D. Record-triggered Flow
Answer: A
NEW QUESTION # 149
What is the easiest way to verify a user before showing them sensitive content?
- A. Calling the Session.forcedLoginUrl method in apex.
- B. Sending the user a SMS message with a passcode.
- C. Calling the generateVerificationUrl method in apex.
- D. Sending the user an Email message with a passcode.
Answer: C
NEW QUESTION # 150
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 Opp.StageName.Label
- B. Call Opportunity.StageName.Label
- C. Call Opp.StageName.getDescri
- D. Call Opportunity.StageName.getDescribe().getLabel()
Answer: D
NEW QUESTION # 151
A developer is creating an app that contains multiple Lightning web components.
One of the child components is used for navigation purposes. When a user clicks a button called Next in the child component, the parent component must be alerted so it can navigate to the next page.
How should this be accomplished?
- A. Update a property on the parent.
- B. Fire a notification.
- C. Call a method in the Apex controller.
- D. Create a custom event,
Answer: D
Explanation:
To notify the parent component from a child component when a button is clicked:
Option C: Create a custom event
Child Component:
// ChildComponent.js
handleClick() {
const nextEvent = new CustomEvent('next');
this.dispatchEvent(nextEvent);
}
Parent Component:
<!-- ParentComponent.html -->
<c-child-component onnext={handleNext}></c-child-component>
javascript
Copy code
// ParentComponent.js
handleNext() {
// Navigate to the next page
}
Reference:
"To communicate up the component containment hierarchy, fire a custom event in the child component."
- Lightning Web Components Developer Guide: Communicate with Events
Why Other Options Are Incorrect:
Option A: Updating a property on the parent directly is not possible from the child.
Option B: "Fire a notification" is vague and not a standard mechanism.
Option D: Calling a method in the Apex controller does not facilitate child-to-parent communication within components.
NEW QUESTION # 152
When a user edits the Postal Code on an Account, a custom Account text field named
''Timezone'' must be updated based on the values in a postalCodeToTimezone_c custom object.
What should be built to implement this feature?
- A. Account assignment rule
- B. Account workflow rule
- C. Account approval process
- D. Account custom trigger
Answer: D
NEW QUESTION # 153
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Salesforce CRT-450 exam is a valuable certification for individuals who want to start their career as a Salesforce platform developer. Salesforce Certified Platform Developer I certification is a foundation-level certification that assesses the essential knowledge and skills required to develop custom applications on the Salesforce platform. Passing the Salesforce CRT-450 exam demonstrates a candidate's proficiency in Salesforce development and validates their expertise in developing custom applications using Apex and Visualforce.
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