All drills

Ship it safely: Apex practice drills

Governor limits, security and the habits that survive a production deploy.

4 drills · Advanced · Free to read, run with Apex Path ($19/month after a 7-day trial)

1. Measure query cost (Beginner, 10 min)
   Measure how many SOQL queries a loop costs, then compare it with one bulk query.
2. Build Contacts with one query and one insert (Intermediate, 18 min)
   Refactor a loop that queries and inserts once per record into one query, a Map lookup and one insert.
3. Gate a release with test evidence (Advanced, 18 min)
   Choose a safe Salesforce test level and block promotion without clean results and a rollback reference.
4. Build a secure Account service (Advanced, 25 min)
   Deploy a with-sharing Account service that blocks users without access and strips fields they cannot create.

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