Multiple rescue clauses in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to rescue a ZeroDivisionError.

Ruby

begin
  result = 10 / 0
rescue [1]
  puts "Cannot divide by zero"
end

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

AZeroDivisionError

BTypeError

CNameError

DArgumentError

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong error class like TypeError or NameError.

Not rescuing any error and letting the program crash.

The ZeroDivisionError is raised when dividing by zero. Rescuing it handles this specific error.

2fill in blank

medium

Complete the code to rescue an IOError.

Ruby

begin
  file = File.open(__FILE__)
  file.close
  file.read
rescue [1]
  puts "IO operation failed"
end

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

AZeroDivisionError

BIOError

CRuntimeError

DNoMethodError

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated error classes like ZeroDivisionError.

Not rescuing the correct error causes the program to crash.

IOError is raised for input/output errors like attempting to read from a closed file.

3fill in blank

hard

Fix the error in the rescue clause to handle both ZeroDivisionError and IOError.

Ruby

begin
  # some code that may raise errors
rescue [1], IOError
  puts "Handled an error"
end

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

AStandardError

BRuntimeError

CZeroDivisionError

DException

Attempts:

3 left

💡 Hint

Common Mistakes

Using a generic error like RuntimeError which may not catch the specific error.

Using Exception which is too broad and not recommended.

To rescue multiple errors, list them separated by commas. Here, ZeroDivisionError and IOError are rescued.

4fill in blank

hard

Fill both blanks to rescue ArgumentError and NoMethodError separately.

Ruby

begin
  # risky code
rescue [1]
  puts "Argument error caught"
rescue [2]
  puts "No method error caught"
end

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

AArgumentError

BZeroDivisionError

CNoMethodError

DIOError

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up error classes in rescue clauses.

Using the same error class for both rescue clauses.

Each rescue clause handles a specific error: ArgumentError and NoMethodError.

5fill in blank

hard

Fill all three blanks to rescue RuntimeError, TypeError, and StandardError in one rescue clause.

Ruby

begin
  # code that may raise errors
rescue [1], [2], [3]
  puts "An error was rescued"
end

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

ARuntimeError

BTypeError

CStandardError

DNoMethodError

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated error classes like NoMethodError here.

Trying to rescue errors in separate rescue clauses instead of one.

Multiple errors can be rescued by listing them separated by commas in one rescue clause.