Fiber for cooperative concurrency in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new Fiber that prints a message.

Ruby

fiber = Fiber.new do
  puts [1]
end
fiber.resume

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

A"Hello from Fiber!"

BFiber.yield

Cresume

Dputs

Attempts:

3 left

💡 Hint

Common Mistakes

Using Fiber.yield instead of a string to print.

Forgetting to put the message inside quotes.

Trying to call resume inside the Fiber block.

The Fiber block should print the string "Hello from Fiber!" using puts.

2fill in blank

medium

Complete the code to yield control back from the Fiber.

Ruby

fiber = Fiber.new do
  puts "Step 1"
  [1]
  puts "Step 2"
end
fiber.resume
fiber.resume

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

Ayield

BFiber.resume

CFiber.yield

Dresume

Attempts:

3 left

💡 Hint

Common Mistakes

Using yield instead of Fiber.yield inside the Fiber block.

Calling Fiber.resume inside the Fiber block.

Using resume without Fiber prefix.

Fiber.yield pauses the Fiber and returns control to the caller.

3fill in blank

hard

Fix the error in the code to resume the Fiber correctly.

Ruby

fiber = Fiber.new do
  puts "Inside Fiber"
end
[1]

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

Afiber.start

BFiber.resume

Cfiber.run

Dfiber.resume

Attempts:

3 left

💡 Hint

Common Mistakes

Using fiber.start which does not exist.

Calling Fiber.resume as a class method.

Using fiber.run which is not a Fiber method.

To start or resume a Fiber, call fiber.resume.

4fill in blank

hard

Fill both blanks to create a Fiber that yields a value and resumes with a parameter.

Ruby

fiber = Fiber.new do
  value = Fiber.yield [1]
  puts "Received: #{value}"
end
fiber.resume
fiber.resume([2])

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

A"yielded value"

B"hello"

C"world"

D42

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a number instead of a string to resume.

Not yielding any value from the Fiber.

Using Fiber.resume instead of fiber.resume.

The Fiber yields the string "yielded value" and resumes receiving "hello".

5fill in blank

hard

Fill all three blanks to create a Fiber that counts and yields each number, then resumes with a message.

Ruby

fiber = Fiber.new do
  (1..3).each do |i|
    message = Fiber.yield [1]
    puts "Count: #{i}, Message: #[2]"
  end
end
fiber.resume
fiber.resume([3])
fiber.resume("Hi")
fiber.resume("Bye")

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

Ai

Bmessage

C"Hello"

D"Start"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string instead of the variable i to yield.

Printing i instead of the received message.

Passing wrong values to resume.

The Fiber yields the current count i, prints the received message, and resumes with "Start" first.