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CuriousTab

CuriousTab

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  • Question
  • Which of the following are unary operators in C?

    1. !
    2. sizeof
    3. ~
    4. &&


  • Options
  • A. 1, 2
  • B. 1, 3
  • C. 2, 4
  • D. 1, 2, 3

  • Correct Answer
  • 1, 2, 3 

    Explanation
    An operation with only one operand is called unary operation.
    Unary operators:
    ! Logical NOT operator.
    ~ bitwise NOT operator.
    sizeof Size-of operator.

    && Logical AND is a logical operator.

    Therefore, 1, 2, 3 are unary operators.


    More questions

    • 1. What will be the output of the program?
      #include<stdio.h>
      int main()
      {
          char ch;
          ch = 'A';
          printf("The letter is");
          printf("%c", ch >= 'A' && ch <= 'Z'? ch + 'a' - 'A':ch);
          printf("Now the letter is");
          printf("%c\n", ch >= 'A' && ch <= 'Z'? ch : ch + 'a' - 'A');
          return 0;
      }
      

    • Options
    • A. The letter is a
      Now the letter is A
    • B. The letter is A
      Now the letter is a
    • C. Error
    • D. None of above
    • Discuss
    • 2. What will be the output of the program?
      #include<stdio.h>
      int main()
      {
          int k, num=30;
          k = (num>5? (num <=10? 100 : 200): 500);
          printf("%d\n", num);
          return 0;
      }
      

    • Options
    • A. 200
    • B. 30
    • C. 100
    • D. 500
    • Discuss
    • 3. If a function contains two return statements successively, the compiler will generate warnings. Yes/No?

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 4. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          char *str;
          str = "%s";
          printf(str, "K\n");
          return 0;
      }
      

    • Options
    • A. Error
    • B. No output
    • C. K
    • D. %s
    • Discuss
    • 5. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          char str1[] = "India";
          char str2[] = "CURIOUSTAB";
          char *s1 = str1, *s2=str2;
          while(*s1++ = *s2++)
              printf("%s", str1);
      
          printf("\n");
          return 0;
      }
      

    • Options
    • A. CuriousTab
    • B. BndiaBIdiaCURIOUSTABia
    • C. India
    • D. (null)
    • Discuss
    • 6. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          int x=30, *y, *z;
          y=&x; /* Assume address of x is 500 and integer is 4 byte size */
          z=y;
          *y++=*z++;
          x++;
          printf("x=%d, y=%d, z=%d\n", x, y, z);
          return 0;
      }
      

    • Options
    • A. x=31, y=502, z=502
    • B. x=31, y=500, z=500
    • C. x=31, y=498, z=498
    • D. x=31, y=504, z=504
    • Discuss
    • 7. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          char *p;
          p="hello";
          printf("%s\n", *&*&p);
          return 0;
      }
      

    • Options
    • A. llo
    • B. hello
    • C. ello
    • D. h
    • Discuss
    • 8. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          int i=3, *j, k;
          j = &i;
          printf("%d\n", i**j*i+*j);
          return 0;
      }
      

    • Options
    • A. 30
    • B. 27
    • C. 9
    • D. 3
    • Discuss
    • 9. What will be the output of the program?
      #include<stdio.h>
      
      int main()
      {
          printf("%c\n", 7["CuriousTab"]);
          return 0;
      }
      

    • Options
    • A. Error: in printf
    • B. Nothing will print
    • C. print "X" of CuriousTab
    • D. print "7"
    • Discuss
    • 10. What will be the output of the program?
      #include<stdio.h>
      power(int**);
      int main()
      {
          int a=5, *aa; /* Address of 'a' is 1000 */
          aa = &a;
          a = power(&aa);
          printf("%d\n", a);
          return 0;
      }
      power(int **ptr)
      {
          int b;
          b = **ptr***ptr;
          return (b);
      }
      

    • Options
    • A. 5
    • B. 25
    • C. 125
    • D. Garbage value
    • Discuss


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