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You need to write a console application that meets the following requirements:
If the application is compiled in Debug mode, the console output must display Entering debug mode.
If the application is compiled in Release mode, the console output must display Entering release mode.
Which code should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Correct Answer: D
Explanation/Reference:
#elif lets you create a compound conditional directive. The #elif expression will be evaluated if neither the preceding #if (C# Reference) nor any preceding, optional, #elif directive expressions evaluate to true. If a #elif expression evaluates to true, the compiler evaluates all the code between the #elif and the next conditional directive. For example:
#define VC7
//…
#if debug Console.Writeline(“Debug build”);
#elif VC7
Console.Writeline(“Visual Studio 7”);
#endif
Incorrect: Not B:
* System.Reflection.Assembly.GetExecutingAssembly Method
Gets the assembly that contains the code that is currently executing.
* Assembly.IsDefined Method
Indicates whether or not a specified attribute has been applied to the assembly.
* System.Dignostics.Debugger Class Enables communication with a debugger.
Property: IsAttached
Gets a value that indicates whether a debugger is attached to the process.
#if DEBUG
Console.WriteLine(“Entering debug mode”);
#else
Console.WriteLine(“Entering release mode”);
#endif
D is correct
invalid answers
?
There is no RELEASE defined by default (only DEBUG and TRACE available).
It’s possible that RELEASE is defined somewhere in the code but this might not meet the second requirement.
So correct answer should be:
#if DEBUG
Console.WriteLine(“Entering debug mode”);
#else
Console.WriteLine(“Entering release mode”);
#endif