Salesforce TVB-450 問題集

質問 1：
A developer must create a CreditcardPayment class that provides an implementation of an existing Payment class. Public virtual class Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } } Which is the correct implementation?
A. Public class CreditCardPayment implements Payment {
public override void makePayment(Decimal amount) { /*Implementation*/ }
}
B. Public class CreditCardPayment implements Payment {
public virtual void makePayment(Decimal amount) { /*implementation*/ }
}
C. Public class CreditCardPayment extends Payment {
public virtual void makePayment(Decimal amount) { /*implementation*/ }
}
D. Public class CreditcardPayment extends Payment {
public override void makePayment(Decimal amount) { /*implementation*/ }
}
正解：D

質問 2：
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 on the Apex Classes page.
B. Select and run the class on the Apex est Execution page in the Developer Console.
C. View the code coverage percentage or the class using the Overalll code Coverage panel in the Developer Console Test tab.
D. View the Class test Percentage tab on the Apex Class list view in Salesforce Setup.
正解：D

質問 3：
Universal Containers hires a developer to build a custom search page to help user- find the Accounts they want. Users will be able to search on Name, Description, and a custom comments field.
Which consideration should the developer be aware of when deciding between SOQL and SOSL?
Choose 2 answers
A. SOQL is able to return more records.
B. SOSL is able to return more records.
C. SOQL is faster for text searches.
D. SOSL is faster for tent searches.
正解：A,D

質問 4：
Universal Containers has a Visualforce page that displays a table of every Container_c. being ....... Is falling with a view state limit because some of the customers rent over 10,000 containers.
What should a developer change about the Visualforce page to help with the page load errors?
A. Implement pagination with an OffsetController.
B. Use JavaScript remoting with SOQL Offset.
C. Implement pagination with a StandardSetController,
D. Use Lazy loading and a transient List variable.
正解：C

質問 5：
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<Contact> 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 the @Readonly annotation and the with sharing keyword on the class.
B. Use a regular expression on the parameter to remove special characters.
C. Use the escapeSingleQuote method to sanitize the parameter before its use.
D. Use variable binding and replace the dynamic query with a static SOQL.
正解：C,D

質問 6：
Cloud kicks has a multi-screen flow that its call center agents use when handling inbound service desk calls.
At one of the steps in the flow, the agents should be presented with a list of order numbers and dates that are retrieved from an external order management system in real time and displayed on the screen.
What should a developer use to satisfy this requirement?
A. An Apex controller
B. An outbound message
C. An Apex REST class
D. An invocable method
正解：C

質問 7：
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.

正解：D