Programming With C MCQ Questions Answers

1. By which file function you can position the file pointer in accordance with the current position?

2. Which function will you use to write a formatted output to the file?

3. What will be printed on the standard output as a result of the following code snippet? void main() { int num1 = 30, num2 = 4; float result; result = (float)(num1/num2); printf('%.2f', result); return 0; }

4. What would be printed on the standard output as a result of the following code snippet? char *str1 = 'Hello World'; strcat(str1, '!'); printf('%s', str1);

5. What does the argv[0] represent?

6. Read the following two declaration statements. 1. #include 2. #include 'stdio.h' Which of the following statements pertaining to the above two statements are correct?

7. What will be the output of following code? int main() { int i; i = 0; for (i = 1; i <2; i++) { i++; printf( '%d', i ); continue; printf('%d', i ); } return 0; }

8. Which header file are methods(or macros) isalpha(), islower() a part of?

9. Which one is the correct way of initializing a two-dimensional array?

10. What will be printed on the standard output as a result of the following code snippet? int funr(int x, int y) { if(x <= 0) { return y; } else { return (1+funr(x-1,y)); } } void main() { printf('%d',funr(2,3)); }

11. Which file mode would mean read + append?

12. What will be the output of the following program? #include main() { int n = 5; assert(n > 3); //statement 1 n = n+2; assert(n > 7);//statement 2 return 0; }

13. What would be printed on the standard output as a result of the following code snippet? main() { int n=5, x; x = n++; printf('%d ', x); x = ++n; printf('%d ', x++); printf('%d', x); return 0; }

14. Which function will convert a string into a double precision quantity?

15. Which one is not a valid mode for opening a file?

16. What is the function to concatenate two strings?

17. What would be printed on the standard output as a result of the following code snippet? main() { enum {red, green, blue = 0, white}; printf('%d %d %d %d', red, green, blue, white); return 0; }

18. The declaration int (*p[5])() means:

19. Which statements is valid and correct?

20. What would be printed on the standard output as a result of the following code snippet? main() { int i=5; char option = 5; switch(option) { case '5': printf('case : 1 \n'); break; case i: printf('case : 2 \n'); break; default: printf('case : 3 \n'); break; } return 0; }

21. What will be printed on the standard output as a result of the following code snippet? void main() { int arr[][2] = {1,2,3,4,5,6}; printf('%d',arr[2][1]); }

22. Which one is not a storage type?

23. What is wrong with the following function prototype statement? int func();

24. Which of the following declarations of structures is/are valid? 1) struct node { int count; char *word; struct node next; }Node; 2) struct node { int count; char *word; struct node *next; }Node; 3) struct node { int count; char *word; union u1 { int n1; float f1; }U; }Node;

25. Which function is used to extract formatted input from a file?

26. What does the following function do? int fn(unsigned int x) { int count = 0; for(; x!=0; x&=(x-1)) count++; return count; }

27. What will be printed on the standard output as a result of the following code snippet? void func() { static int i = 1; int j = 1; i++; j++; printf('%d %d ',i,j); } void main() { func(); func(); func(); }

28. Select the correct statement about arrays.

29. Which standard function is used to close a file?

30. Which function allocates memory and initializes elements to 0?

31. What would be printed on the standard output as a result of the following code snippet? main() { char *pmessage = 'asdfgh'; *pmessage++; printf('%s', pmessage); return 0; }

32. What would be printed on the standard output as a result of the following code snippet? #define max(a, b)((a) > (b)?(a):(b)) main() { int a=4, c = 5; printf('%d ', max(a++, c++)); printf('%d %d\n', a,c); }

33. What would be printed on the standard output as a result of the following code snippet? main() { int a[5] = {1,4,5,6,9}; printf('%d\t', *a); //Line 1 printf('%d', *++a); //Line 2 return 0; }

34. What will happen when the following code is executed? void main() { char arr1[] = 'REGALINT'; char arr2[10] = 'REGALINT'; printf('%d,',sizeof(arr1)); printf('%d',sizeof(arr2)); }

35. What will be printed on the standard output as a result of the following code snippet? void main() { int arr[5]={1,2,3,4,5}; printf('%d\n', *(arr+4)); }

36. Given the following array: int a[8] = {1,2,3,4,5,6,7,0}; what would be the output of printf('%d',a[4]); ?

37. What will happen when the following code is executed? { int num; num =0; do {-- num; printf('%d\n', num); num++; } while (num >=0); }

38. Which is/are the correct signature/s of main with command line arguments?

39. What would be printed on the standard output as a result of the following code snippet? int Recur(int num) { if(num==1 || num==0) return 1; if(num%2==0) return Recur(num/2)+2; else return Recur(num-1)+3; } int main() { int a=9; printf('%d\n', Recur(a)); return 0; }

40. An array is defined with the following statement in a file, file1.c int a[ ] = { 1, 2, 3, 4, 5, 6 }; In another file, file2.c, the following code snippet is written to use the array a: extern int a[]; int size = sizeof(a); What is wrong with the above code snippet?

41. Which statements are correct for the keyword register?

42. Which one is not a type of operator ?

43. What would be printed on the standard output as a result of the following code snippet? char i = 'A'; char *j; j = & i; *j = *j + 32; printf('%c',i);

44. Which standard function is used to deallocate memory allocated by the malloc() function?

45. What will be printed on the standard output as a result of the following code snippet? void main() { char arr[] = {'R','A','M'}; printf('%d',strlen(arr)); }

46. What will be printed on the standard output as a result of the following code snippet? void main() { char arr[] = {'R','A','M','\0'}; printf('%d',strlen(arr)); }

47. Which comparison statement will be true if an integer is 16 bits and a long is 32 bits on a machine?

48. Which statements will result in a compilation error?

49. Is the following statement correct? If not, why not? If yes, what is the size of the array? int array[][3] = { {1,2}, {2,3}, {3,4,2} };

50. If a two dimensional array arr[4][10](an array with 4 rows and 10 columns) is to be passed in a function, which of the following would be the valid parameters in the function definition?

51. What would be printed on the standard output as a result of the following code snippet? #define max(a, b) ((a) > (b)?(a):(b)) main() { int a=4; float b=4.5; printf('%.2f\n',max(a, b)); }

52. What would be printed on the standard output as a result of the following code snippet? main() { void addup (int b); addup(b); return 0; } int b = 5; void addup (int b) { static int v1; v1 = v1+b; printf('%d ', v1); }

53. What would be printed on the standard output as a result of the following code snippet? #include main() { unsigned char a=255; a = a+1; printf('%d',a); return 0; }

54. Given the array: int num[3][4]= { {3,6,9,12}, {15,25,30,35}, {66,77,88,99} }; what would be the output of *(*(num+1)+1)+1?

55. Identify the incorrect statement.

56. What would be the output of the following code snippet? int b = 5; main() { void addup (int b); int i; for(i=1; i<=5; i++) addup(1); return 0; } void addup (int b) { static int v1; v1 = v1+b; printf('%d ', v1); }

57. What is the return type of the following function declaration? func(char c);

58. What would be printed on the standard output as a result of the following code snippet? main( ) { char *str[ ] = { 'Manish' 'Kumar' 'Choudhary' }; printf ( '\nstring1 = %s', str[0] ); printf ( '\nstring2 = %s', str[1] ); printf ( '\nstring3 = %s', str[2] ); }

59. What is the return value in case a file is not opened successfully by using fopen()?

60. Which function will convert a string into an integer?

61. Which one is not a string function?

62. Which function returns the current pointer position within a file?

63. What will happen if you assign a value to an element of an array the subscript of which exceeds the size of the array?

64. What would be printed on the standard output as a result of the following code snippet? main() { int arr[10]; int a = sizeof(arr); printf('%d\n',a); return 0; }

65. Which function will you use to position the file pointer at the beginning of the file?

66. Given the following array: char books[][40]={ 'The Little World of Don Camillo', 'To Kill a Mockingbird', 'My Family and Other Animals', 'Birds, Beasts and Relatives' }; what would be the output of printf('%c',books[2][5]);?

67. Suppose there is a file a.dat which has to be opened in the read mode using the FILE pointer ptr1, what will be the correct syntax?

68. Which is/are the type/s of memory allocation that needs/need the programmer to take care of memory management?

69. What would be printed on the standard output as a result of the following code snippet? main() { char *s='Hello World'; char s1[20], s2[20]; int len = sscanf(s,'%s',s1); printf('%s : %d', s1, len); }

70. Which sets of conversion statements may result in the loss of data?

71. In order to read structures/records from a file, which function will you use?

72. Read the statement below: extern int a; Which statement/s pertaining to the above statement is/are correct?

73. Which one is the correct way of initializing a two-dimensional array?

74. What will be printed on the standard output as a result of the following code snippet? void main() { int i,j,k; i=4; j=30; k=0; k=j++/i++; ++k; printf('%d %d %d',i,j,k); }

75. The declaration int *(*p)[10] indicates:

76. What will be the output of the following program, assuming that data type short takes 2 bytes for storage? struct node { unsigned char bit1 : 1; unsigned char bit2 : 1; unsigned short bit3 : 7; } node1; main() { int size = sizeof(node1); printf('%d', size); }