SALESFORCE-PD1 Process Automation And Logic Practice Question
A developer needs to schedule an Apex class to run weekly. Which THREE elements are required to implement Schedulable Apex? (Choose THREE.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The public class must implement the Schedulable interface.
Schedulable Apex requires implementing the Schedulable interface, defining the execute method, and scheduling via System.schedule with a Cron expression.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The class must extend the Controller class.
Why it's wrong here
Schedulable classes do not extend controllers.
- ✗
The class must implement Database.Batchable<SObject>.
Why it's wrong here
Batchable is optional and only needed if chunking large queries inside the scheduled job.
- ✓
The public class must implement the Schedulable interface.
Why this is correct
Implementation of the Schedulable interface is mandatory.
- ✓
The job must be invoked using System.schedule() with a valid Cron expression.
Why this is correct
System.schedule binds the cron expression and schedulable class together.
- ✓
The class must define the global or public void execute(SchedulableContext sc) method.
Why this is correct
The execute method is the entry point for scheduled jobs.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Salesforce exam blueprint
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