Avoiding NPEs. Null safety
Where it sits
Learn first
Nullable and non-nullable typesThis skill
Avoiding NPEs. Null safety
Leads to
The roles below put it to work directly.
Jobs that need it
- Android Developercorelevel 3
What level 3 (Working) means
Uses it independently on the job. Level 4 (Strong): handles hard cases, reviews others.
Start learning
Avoiding NPEs. Null safety
How to work with exceptions
about 19 min8 parts
Open the lessonAvoiding NPEs. Null safety: common questions
What is Avoiding NPEs. Null safety?
Avoiding NPEs. Null safety is a skill in kotlin, needed by 1 role on BootSelf.
Which jobs need Avoiding NPEs. Null safety?
Android Developer. Most ask for level 3 (Working): uses it independently on the job.
What should I learn before Avoiding NPEs. Null safety?
Nullable and non-nullable types.
How long does it take to learn Avoiding NPEs. Null safety?
The starting lesson, Avoiding NPEs. Null safety, takes about 19 minutes. Reaching the level a job asks for takes practice on top: BootSelf measures where you are and plans the rest.
How do I practise Avoiding NPEs. Null safety?
Check your readiness for free, then BootSelf builds a route and short daily learning loops: a little theory, checks on what you get wrong, then a small program.