Exams
1. Login tech-exams site.
http://exams.masanaka.biz/login
2. After login, it will be shown category list page.

3. Click `Start` button, and then jump to exam list page.

4. Click `Challenge` button, and then jump to exam page.

5. You should put answer to Code area.
6. Click `Submit` button, and then system will evalute your code and it will show result to result area
If it has an error, it will be shown below result.

If it has no error, it will be shown below result.

You can submit answer any times within time.