C Program find Output code snippet SET - 9

1.	How many times the while loop will get executed if a short int is 2 byte wide? #include<stdio.h> int main() {     int j=1;     while(j <= 255)     {         printf("%c %d\n", j, j);         j++;     }     return 0; }
	A. Infinite times B. 255 times C. 256 times D. 254 times Workspace

2.	Which of the following errors would be reported by the compiler on compiling the program given below? #include<stdio.h> int main() {     int a = 5;     switch(a)     {     case 1:     printf("First");     case 2:     printf("Second");     case 3 + 2:     printf("Third");     case 5:     printf("Final");     break;     }     return 0; }
	A. There is no break statement in each case. B. Expression as in case 3 + 2 is not allowed. C. Duplicate case case 5: D. No error will be reported. Workspace

3.	Point out the error, if any in the program. #include<stdio.h> int main() {     int P = 10;     switch(P)     {        case 10:        printf("Case 1");        case 20:        printf("Case 2");        break;        case P:        printf("Case 2");        break;     }     return 0; }
	A. Error: No default value is specified B. Error: Constant expression required at line case P:  C. Error: There is no break statement in each case. D. No error will be reported. Workspace

4.	What will be the output of the program? #include<stdio.h> int main() {     int i=2;     printf("%d, %d\n", ++i, ++i);     return 0; }
	A. 3, 4 B. 4, 3 C. 4, 4 D. Output may vary from compiler to compiler Workspace

5.	In the expression a=b=5 the order of Assignment is NOT decided by Associativity of operators
	A. True B. False Workspace

6.	What is the notation for following functions? 1.  int f(int a, float b)     {         /* Some code */     } 2.  int f(a, b)     int a; float b;     {         /* Some code */     }
	A. 1. KR Notation 2. ANSI Notation B. 1. Pre ANSI C Notation 2. KR Notation C. 1. ANSI Notation 2. KR Notation D. 1. ANSI Notation 2. Pre ANSI Notation Workspace

7.	How many times the program will print "IndiaBIX" ? #include<stdio.h> int main() {     printf("IndiaBIX");     main();     return 0; }
	A. Infinite times B. 32767 times C. 65535 times D. Till stack overflows Workspace

8.	What will be the output of the program? #include<stdio.h> #define SQR(x)(x*x) int main() {     int a, b=3;     a = SQR(b+2);     printf("%d\n", a);     return 0; }
	A. 25 B. 11 C. Error D. Garbage value Workspace

9.	A preprocessor directive is a message from programmer to the preprocessor.
	A. True B. False Workspace

10.	What will be the output of the program ? #include<stdio.h> int main() {     char *p;     p="hello";     printf("%s\n", *&*&p);     return 0; }
	A. llo B. hello C. ello D. h Workspace

11.	How will you free the allocated memory ?
	A. remove(var-name); B. free(var-name); C. delete(var-name); D. dalloc(var-name); Workspace

12.	In a file contains the line "I am a boy\r\n" then on reading this line into the array str using fgets(). What will str contain?
	A. "I am a boy\r\n\0" B. "I am a boy\r\0" C. "I am a boy\n\0" D. "I am a boy" Workspace

13.	Which files will get closed through the fclose() in the following program? #include<stdio.h> int main() {     FILE *fs, *ft, *fp;     fp = fopen("A.C", "r");     fs = fopen("B.C", "r");     ft = fopen("C.C", "r");     fclose(fp, fs, ft);     return 0; }
	A. "A.C" "B.C" "C.C" B. "B.C" "C.C" C. "A.C" D. Error in fclose() Workspace

14.	If the file 'source.txt' contains a line "Be my friend" which of the following will be the output of below program? #include<stdio.h> int main() {     FILE *fs, *ft;     char c[10];     fs = fopen("source.txt", "r");     c[0] = getc(fs);     fseek(fs, 0, SEEK_END);     fseek(fs, -3L, SEEK_CUR);     fgets(c, 5, fs);     puts(c);     return 0; }
	A. friend B. frien C. end D. Error in fseek(); Workspace

15.	According to ANSI specifications which is the correct way of declaring main when it receives command-line arguments?
	A. int main(int argc, char *argv[]) B. int main(argc, argv) int argc; char *argv; C. int main() {     int argc; char *argv; } D. None of above Workspace

16.	What will be the output of the program (myprog.c) given below if it is executed from the command line? cmd> myprog one two three /* myprog.c */ #include<stdio.h> #include<stdlib.h> int main(int argc, char **argv) {     printf("%s\n", *++argv);     return 0; }
	A. myprog B. one C. two D. three Workspace

17.	Point out the correct statement which correctly allocates memory dynamically for 2D array following program? #include<stdio.h> #include<stdlib.h> int main() {     int *p, i, j;     /* Add statement here */     for(i=0; i<3; i++)     {         for(j=0; j<4; j++)         {             p[i*4+j] = i;             printf("%d", p[i*4+j]);         }     }     return 0; }
	A. p = (int*) malloc(3, 4); B. p = (int*) malloc(3*sizeof(int)); C. p = malloc(3*4*sizeof(int)); D. p = (int*) malloc(3*4*sizeof(int)); Workspace

18.	malloc() allocates memory from the heap and not from the stack.
	A. True B. False Workspace

19.

Point out the error in the following program. #include<stdio.h> #include<stdarg.h> void display(char *s, ...); int fun1(); int fun2(); int main() {     int (*p1)();     int (*p2)();     p1 = fun1;     p2 = fun2;     display("IndiaBIX", p1, p2);     return 0; } void display(char *s, ...) {     int (*pp1)();     int (*pp2)();     va_list ptr;     va_start(ptr, s);     pp1 = va_arg(ptr, int(*)());     (*pp1)();     pp2 = va_arg(ptr, int(*)());     (*pp2)(); } int fun1() {     printf("Hello"); } int fun2() {     printf("Hi"); }

A. Error: invalid function display() call B. Error: invalid va_start(ptr, s); C. Error: va_arg cannot extract function pointer from variable argument list. D. Error: Rvalue required for t Workspace

20.	What do the following declaration signify? int (*ptr)[30];
	A. ptr is a pointer to an array of 30 integer pointers. B. ptr is a array of 30 integer function pointer. C. ptr is a array of 30 integer pointers. D. ptr is a array 30 pointers.

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