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Salesforce Trailhead Virtual Bootcamp for Platform Developer I Sample Questions (Q56-Q61):

NEW QUESTION # 56
A developer must create a ShippingCalculator class that cannot be instantiated and must include a working default implementation of a calculate method, that sub-classes can override. What is the correct implementation of the ShippingCalculator class?

• A. Public abstract class ShippingCalculator {
  public override calculate() { /*implementation*/ }
  }
• B. Public abstract class ShippingCalculator {
  public abstract calculate() { /*implementation*/ }
  }
• C. Public abstract class ShippingCalculator {
  public void calculate() { /*implementation*/ }
  }
• D. Public abstract class ShippingCalculator {
  public virtual void calculate() { /*implementation*/ }
  }

Answer: D

Explanation:
the extending class can override the existing virtual methods by using the override keyword in the method definition. Overriding a virtual method allows you to provide a different implementation for an existing method https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_classes_extending.htm

NEW QUESTION # 57
Cloud kicks has a muli-screen flow 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 number and dates that are retrieved from an external odrer management system in real time and displayed on the screen.
What shuold a developer use to satisfy this requirement?

• A. An outbound message
• B. An Apex Controller
• C. An apex REST class
• D. An invocae method

Answer: C

NEW QUESTION # 58
Universal Containers implemented a private sharing model for the Account object. A custom Account search tool was developed with Apex to help sales representatives find accounts that match multiple criteria they specify. Since its release, users of the tool report they can see Accounts they do not own. What should the developer use to enforce sharing permission for the currently logged-in user while using the custom search tool?

• A. Use the with sharing keyword on the class declaration.
• B. Use the schema describe calls to determine if the logged-in users has access to the Account object.
• C. Use the without sharing keyword on the class declaration.
• D. Use the UserInfo Apex class to filter all SOQL queries to returned records owned by the logged-in user.

Answer: A

NEW QUESTION # 59
Universal container wants a list button to display a visualforce page that allows users to edit multiple records which visualforce feature supports this requirement.

• A. Recordsetvar page attribute

Answer: A

NEW QUESTION # 60
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 extends Payment {
  public override void makePayment(Decimal amount) { /*implementation*/ }
  }
• C. Public class CreditCardPayment implements Payment {
  public virtual void makePayment(Decimal amount) { /*implementation*/ }
  }
• D. Public class CreditCardPayment extends Payment {
  public virtual void makePayment(Decimal amount) { /*implementation*/ }
  }

Answer: B

NEW QUESTION # 61
......

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