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

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Where are two locations a developer can look to find information about the status of asynchronous or future cals? Choose 2 answers

• A.Paused Flow Interviews component
• B.Apex Flex Queue
• C.Apex Jobs
• D.Time-Based Workflow Monitor

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What can be developed using the Lightning Component framework?

• A.Hosted web applications
• B.Dynamic web sites
• C.Single-page web apps
• D.Salesforce integrations

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A developer writes a SOQL query to find child records for a specific parent. How many levels can be returned in a single query?

• A.7
• B.1
• C.3
• D.5

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As a part of class implementation a developer must execute a SOQL query against a large data ser based on the contact object. The method implementation is as follows.

Which two methods are best practice to implement heap size control for the above code? (Choose 2 Answers)

• A.Use visual keyword when declaring the retrieve variable.
• B.Use the FOR UPDATE option on the SOQL query to lock down the records retrieved.
• C.Use a SOQL FOR loop, to chunk the result set in batches of 200 records.
• D.Use WHERE clauses on the SOQL query to reduce the number of records retrieved.

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