Concurrency in the Go assessment

What it covers

Goroutines, channels, select, sync primitives and context for cancellation and timeouts.

Topics in the practice set for this area

• concurrency
• channels
• context

How it is tested

In the timed assessment, questions in this area use these formats: code you write, matching, multiple choice, put the steps in order, short answer. Each attempt draws its own set of questions, and this area gets its own sub-score on the credential when the attempt includes enough questions from it. The assessment questions themselves are never published; the practice set below is written separately for study.

What to practice

• Build a worker pool with a buffered channel and a WaitGroup.
• Cancel a group of goroutines with context and confirm none leak.
• Know which channel operations block, and what happens on a closed or nil channel.

Try a practice question

From the free practice set (5 questions in this area). Answers and explanations are in the practice set.

• Go's primary concurrency primitive is:
• How do you send a value into a channel `ch`?
• An unbuffered channel blocks the sender until:

More Go study guides

• How to Pass the Provyn Go Assessment
• Errors & idiom
• Testing & performance