GO Channels and Communication 2

Question 1

What is a directional channel type in Go?

Accepted Answer

A channel restricted to send-only or receive-only operations

Answer

A channel with a fixed direction in memory

Answer

A channel that sends in order

Answer

A bidirectional buffered channel

Question 2

What does `select { case <-ch: default: }` do?

Accepted Answer

Performs a non-blocking receive from ch

Answer

Blocks until ch receives

Answer

Closes ch if empty

Answer

Drains all values from ch

Question 3

Which channel declaration creates an unbuffered channel of strings?

Accepted Answer

Both B and C

Answer

var ch chan string

Answer

ch := make(chan string)

Answer

ch := make(chan string, 0)

Question 4

What is a nil channel's behavior when read from or written to?

Accepted Answer

Blocks forever

Answer

Panics immediately

Answer

Returns zero value

Answer

Causes compile error

Question 5

How can you implement a timeout for a channel receive in Go?

Accepted Answer

Use select with a time.After case

Answer

Use time.Sleep before receiving

Answer

Use ch.Timeout(d)

Answer

Use context.Deadline only

Question 6

What is the fan-out concurrency pattern in Go?

Accepted Answer

One input channel is read by multiple goroutines in parallel

Answer

One goroutine reads from multiple channels

Answer

Multiple channels merge into one

Answer

Goroutines share a single mutex