41. For each #if, #ifdef, and #ifndef directive.

1. 1. Zero or one #else directive

   
   
   

   2. There are zero or more #elif directives

   
   
   

   3. One matching #endif directive

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Zero or one #else directive.
   There are zero or more #elif directives.
   One matching #endif directive.

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42. The #elif directive cannot appear after the preprocessor #else directive.

1. 1. Can appear after the preprocessor #else directive.

   
   
   

   2. Varies

   
   
   

   3. False

   
   
   

   4. True

   
   
   

   5. Both A and D

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: E

   Can appear after the preprocessor #else directive.

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43. Conditional inclusion can be used for ___________.

1. 1. Check for existence of a variable and doing something if it exists

   
   
   

   2. Preventing multiple declarations of same function

   
   
   

   3. Preventing multiple declarations of a variable

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Check for existence of a variable and doing something if it exists.
   Preventing multiple declarations of same function.
   Preventing multiple declarations of a variable.

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44. In a conditional inclusion, if the condition that comes after the if is true, then what will happen during compilation?

1. 1. Then the code up to the following #endif is compiled even if #else or #elif is present

   
   
   

   2. Then the code up to the following #eliif is compiled

   
   
   

   3. Then the code up to the following #else or #elif or #endif is compiled

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Then the code up to the following #else or #elif or #endif is compiled

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45. Which of the following sequences are unaccepted in C language?
    

1. 1. #if
         #undef
         #endif
      

   
   
   

   2. #if
         #else
         #endif
      

   
   
   

   3. #if
         #elif
         #endif
      

   
   
   

   4.  #if
         #if
         #endif
      

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   #if
   #if
   #endif

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