Builder capstone and technical defense
Show a small application’s behavior and defend its limits.
Reviewed: 2026-10-03
Source-based teaching example · Fictional data
Narration: Microsoft Mark · locally synthesized

00:00:00.000 — What you will learn

Show a small application’s behavior and defend its limits.

Visual description:
Show a small application’s behavior and defend its limits.

00:00:06.542 — The idea

Connect the task, access rules, output checks and tests. Show how a new failure is detected and handled. A file named “test” is not proof that the important rule was tested.

Visual description:
Connect the task, access rules, output checks and tests. Show how a new failure is detected and handled. A file named “test” is not proof that the important rule was tested.

00:00:21.500 — One useful term

Technical defense. Explaining your design and conclusions using work a reviewer can inspect.

Visual description:
Explaining your design and conclusions using work a reviewer can inspect.

00:00:30.667 — A worked example

A surprise change alters an access label. The learner detects the regression, blocks release and restores the prior record. The incident becomes a new test case.

Visual description:
A surprise change alters an access label. The learner detects the regression, blocks release and restores the prior record. The incident becomes a new test case.

00:00:44.458 — Your turn to think

Does a checked box prove an access rule works? Pause and decide before continuing.

Visual description:
Does a checked box prove an access rule works?
Pause the video if you need more time.

00:01:01.083 — Why this answer works

No. Show the test and its result. Keep the demo’s claims within its offline training conditions.

Visual description:
No. Show the test and its result. Keep the demo’s claims within its offline training conditions.

00:01:10.792 — Check 1

Link requirements to actual tests.

Visual description:
Link requirements to actual tests.

00:01:16.208 — Check 2

Demonstrate failure and recovery.

Visual description:
Demonstrate failure and recovery.

00:01:21.333 — Check 3

Explain what remains unverified.

Visual description:
Explain what remains unverified.

00:01:26.500 — Now try a different case

Open the lesson and try its different practice case. Use every check in the full task. Watching alone does not mark the lesson complete.

Visual description:
Open the lesson
Try the new case
Check and revise
The full task and its requirements are in the linked lesson.