ApexBeginnertestingcoverage
What is a test class and why is 75% coverage required?
Real World Scenario
Deployment fails due to insufficient test coverage. You explain Apex testing basics.
Expected Answer
• Test classes use @isTest methods to verify Apex logic with mock data
• Production deployments require at least 75% org-wide Apex coverage and all tests passing
• Tests run in isolated context with SeeAllData=false by default—you create test data
• Good tests assert business outcomes, not just run code for coverage
• Tests prevent regressions when metadata changes
Follow-Up Questions & Answers
Click to expand — each follow-up includes a direct, interview-ready answer
No. Coverage only means lines executed. You need meaningful assertions on edge cases and bulk scenarios.
Architect Perspective
Say coverage is a gate, not a goal—distinction marks thoughtful juniors.