Channel creation in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a channel of integers.

Go

ch := make([1])

Drag options to blanks, or click blank then click option'

Achannel int

Bint

Cchan int

Dchan

Attempts:

3 left

💡 Hint

Common Mistakes

Using just the type without 'chan' keyword.

Writing 'channel' instead of 'chan'.

Omitting the 'chan' keyword.

The make function is used to create channels in Go. The correct syntax is make(chan int) to create a channel of integers.

2fill in blank

medium

Complete the code to create a buffered channel of strings with capacity 5.

Go

ch := make(chan string, [1])

Drag options to blanks, or click blank then click option'

A3

B0

C10

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using zero capacity for a buffered channel.

Forgetting the capacity argument.

Using a negative or invalid number.

To create a buffered channel, you specify the capacity as the second argument to make. Here, the capacity is 5.

3fill in blank

hard

Fix the error in the channel creation code.

Go

ch := make(chan int [1])

Drag options to blanks, or click blank then click option'

A 5

B, 5

C; 5

D: 5

Attempts:

3 left

💡 Hint

Common Mistakes

Using space instead of comma between arguments.

Using semicolon or colon instead of comma.

Omitting the comma.

The capacity argument must be separated by a comma inside the make function call. So it should be make(chan int, 5).

4fill in blank

hard

Fill both blanks to create a buffered channel of floats with capacity 8.

Go

ch := make([1], [2])

Drag options to blanks, or click blank then click option'

Achan float64

Bchan int

C8

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong channel type like chan int.

Using wrong capacity number.

Omitting the capacity for buffered channel.

The channel type is chan float64 for floats, and the capacity is 8 for buffering.

5fill in blank

hard

Fill all three blanks to create an unbuffered channel of booleans and assign it to variable done.

Go

var done [1]
done = make([2])

// Use the channel
done[3] true

Drag options to blanks, or click blank then click option'

Achan bool

C<-chan bool

D <-

Attempts:

3 left

💡 Hint

Common Mistakes

Using directional channel type <-chan bool incorrectly.

Using function call syntax like () instead of <- for sending.

Declaring variable with wrong type.

The variable done is declared as a channel of booleans chan bool. It is created with make(chan bool). The last blank is <- to send to the channel: done <- true.