What is the purpose of the #undef directive in C preprocessing?

In C preprocessing, what is the purpose of the #undef directive?

A

To undefine a macro

B

To include a header file

C

To define a macro

D

To declare a variable

Which of the following statements is/are correct regarding the Directive Principles of the State Policy? A. In case of a conflict between the Directive Principles and Fundamental Rights, the Directive Principles shall prevail in the court. B. Fundamental rights are not unlimited and citizens are subject to reasonable restrictions. The Directive Principles are subject to any constitutional limitations.

A

Only B

B

Both A and B

C

Only A

D

Neither of A and B

What is the purpose of the #define directive in C preprocessing?

A

To include a header file

B

To define a macro

C

To declare a constant

D

To declare a variable

What is the purpose of the #include directive in C preprocessing?

A

To define a macro

B

To include a header file

C

To declare a variable

D

To conditionally compile code

What is the purpose of the #if directive in C preprocessing?

A

To check if a variable is declared

B

To conditionally include code

C

To include a header file

D

To define a macro

What is the purpose of the #error directive in C preprocessing?

A

To include an error message in the code

B

To define a macro

C

To check if a variable is declared

D

To conditionally compile code

What is the purpose of the #pragma once directive in C preprocessing?

A

Prevents recursive inclusion of header files

B

Defines a macro

C

Checks for syntax errors

D

Excludes code

In C preprocessing, what is the purpose of the #elif directive?

A

Checks if a macro is defined

B

Checks if a macro is not defined

C

Provides an alternative condition

D

Defines a macro

What is the purpose of the #pragma message directive in C preprocessing?

A

Includes a message in the code

B

Defines a macro

C

Checks for syntax errors

D

Excludes code

What is the purpose of the #pragma warning directive in C preprocessing?

A

Generates a warning message

B

Defines a macro

C

Checks for syntax errors

D

Excludes code

What is the purpose of the #undef directive in C preprocessing?

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