Build configurations (Debug, Release) in iOS Swift - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print a message only in Debug mode.

iOS Swift

#if [1]
  print("This is Debug mode")
#endif

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

APRODUCTION

BTESTING

CRELEASE

DDEBUG

Attempts:

3 left

💡 Hint

Common Mistakes

Using RELEASE instead of DEBUG causes the code to run only in Release builds.

Forgetting the #if directive syntax.

In Swift, the DEBUG flag is set for Debug builds, so checking #if DEBUG allows code to run only in Debug mode.

2fill in blank

medium

Complete the code to print a message only in Release mode.

iOS Swift

#if [1]
print("This is Release mode")
#endif

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

A!DEBUG

BDEBUG

CRELEASE

DPRODUCTION

Attempts:

3 left

💡 Hint

Common Mistakes

Using RELEASE directly is not a default flag in Swift builds.

Forgetting the #if and #endif directives.

The condition #if !DEBUG means the code runs when DEBUG is not set, which is typically the Release build.

3fill in blank

hard

Fix the error in the code to print a debug message only in Debug builds.

iOS Swift

#if [1]
print("Debug build active")
#endif

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

ADEBUG

BRELEASE

CTEST

DPROD

Attempts:

3 left

💡 Hint

Common Mistakes

Using RELEASE or other undefined flags causes the code not to compile or run as expected.

The correct flag to check for Debug builds is DEBUG, not RELEASE or other names.

4fill in blank

hard

Fill both blanks to define a variable only in Debug mode and assign it a value.

iOS Swift

#if [1]
let mode = [2]
#endif

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

ADEBUG

B"Debug"

C"Release"

DRELEASE

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning the string "Release" inside the Debug block.

Using RELEASE flag instead of DEBUG.

The variable should be defined only in Debug mode using #if DEBUG and assigned the string "Debug".

5fill in blank

hard

Fill all three blanks to print different messages for Debug and Release modes.

iOS Swift

#if [1]
print([2])
#else
print([3])
#endif

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

ADEBUG

B"Debug mode active"

C"Release mode active"

DRELEASE

Attempts:

3 left

💡 Hint

Common Mistakes

Using RELEASE flag which is not predefined.

Mixing up the print messages.

Use #if DEBUG to check Debug mode, print "Debug mode active" there, else print "Release mode active".