26. Which of the following cannot be checked in a switch - case statement?

1. 1. Character

   
   
   

   2. Integer

   
   
   

   3. Float

   
   
   

   4. enum

   
   
   

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1. View Hint View Answer Discuss in Forum

   Float

   Correct Option: C

   Float

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27. Which of the following statement are correct about the program given below?
    

    #include <stdio.h>
    int main ( )
    {
         int x = 10, y = 20;
         if (x == 15) && if (y == 20)
              printf ("Have a nice day\n");
         return 0;
    }
    

1. 1. Output: Have a nice day

   
   
   

   2. No output

   
   
   

   3. Error: 'Expression syntax'

   
   
   

   4. Error: 'Undeclared identifier if'

   
   
   

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1. View Hint View Answer Discuss in Forum

   The correct form of if would be :
   if ((x == 15) && (y == 20))
   printf ( "Have a nice day\n");
   

   Correct Option: C

   The correct form of if would be :
   if ((x == 15) && (y == 20))
   printf ( "Have a nice day\n");
   

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28. Which of the following statement are correct about an if-else statement in a C program ?

1. 1. Every if-else statement can be replaced by an equivalent statement using? : operators.

   
   
   

   2. Nested if-else statements are allowed.

   
   
   

   3. If we use an if it is compulsory to use an else.

   
   
   

   4. Multiple statements in an if block are allowed.
      

   
   
   

   5. Multiple statement in an else block are allowed

   
   
   

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1. View Hint View Answer Discuss in Forum

   Nested if-else statements

   Correct Option: B

   Nested if-else statements are allowed.

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29. What will be the output of the following C code?
    

    #include <stdio.h>
        switch (name)
        {
        case 'n':
        case 'N':
            printf("Right...");
        }
    

1. 1. if (name== 'n')
      if (name== 'n') printf("Right...");

   
   
   

   2. if (name== ‘n’ || name== ‘N’) printf(“Right...”);

   
   
   

   3. if (name== ‘n’ && name== ‘N’) printf(“Right...”);

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   error: expected unqualified-id before 'switch'
   switch (ch)

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30. What will be the output of the following C code?
    

    #include <stdio.h>
        int main()
        {
            int n = 1;
            switch (n)
            {
            case n:
                printf("Case N ");
            default:
                printf("Default");
            }
        }
    

1. 1. Compilation Error

   
   
   

   2. Case N

   
   
   

   3. Default

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Compilation Error
   

   In function 'int main()':
   error: 'a' cannot appear in a constant-expression
            case a:
   

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