Explore topic-wise MCQs in Engineering.

What will be the output of the program?

#include<stdio.h> int main() { void fun(char*); char a[100]; a[0] = 'A'; a[1] = 'B'; a[2] = 'C'; a[3] = 'D'; fun(&a[0]); return 0; } void fun(char *a) { a++; printf("%c", *a); a++; printf("%c", *a); } 

Which of the following statements are correct about the function?

long fun(int num)
{ int i; long f=1; for(i=1; i<=num; i++) f = f * i; return f;
}

Assuming, integer is 2 byte, What will be the output of the program?

#include<stdio.h> int main()
{ printf("%x n", -2<<2); return 0;
}

What will be the output of the program?

#include<stdio.h> int main() { int i=-3, j=2, k=0, m; m = ++i || ++j && ++k; printf("%d, %d, %d, %d n", i, j, k, m); return 0; } 

What will be the output of the program?

#include<stdio.h> int main() { int x=12, y=7, z; z = x!=4 || y == 2; printf("z=%d n", z); return 0; } 

What will be the output of the program?

#include<stdio.h>
int main()
{ static int a[20]; int i = 0; a[i] = i ; printf("%d, %d, %d n", a[0], a[1], i); return 0;
}

What will be the output of the program?

#include<stdio.h> int main() { float a=0.7; if(a < 0.7) printf("C n"); else printf("C++ n"); return 0; } 

What will be the output of the program ?

#include<stdio.h> int main() { int a=250; printf("%1d n", a); return 0; } 

What will be the output of the program?

#include<stdio.h>
int main()
{ float *p; printf("%d n", sizeof(p)); return 0;
}

What will be the output of the program if value 25 given to scanf()?

#include<stdio.h> int main()
{ int i; printf("%d n", scanf("%d", &i)); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ printf("%c n", ~('C'*-1)); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main() { FILE *fp; unsigned char ch; /* file 'abc.c' contains "This is IndiaBIX " */ fp=fopen("abc.c", "r"); if(fp == NULL) { printf("Unable to open file"); exit(1); } while((ch=getc(fp)) != EOF) printf("%c", ch); fclose(fp); printf(" n", ch); return 0; } 

What will be the output of the program ?

#include<stdio.h> int main()
{ char *p; p="%d n"; p++; p++; printf(p-2, 23); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ FILE *fp; char ch, str[7]; fp=fopen("try.c", "r"); /* file 'try.c' contains "This is Nagpur" */ fseek(fp, 9L, SEEK_CUR); fgets(str, 5, fp); puts(str); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ printf("%%%% n"); return 0;
}

What will be the output of the program?

#include<stdio.h>
int i;
int fun(); int main()
{ while(i) { fun(); main(); } printf("Hello n"); return 0;
}
int fun()
{ printf("Hi");
}

What will be the output of the program?

#include<stdio.h> void fun(int*, int*); int main() { int i=5, j=2; fun(&i, &j); printf("%d, %d", i, j); return 0; } void fun(int *i, int *j) { *i = *i**i; *j = *j**j; } 

What will be the output of the program?

#include<stdio.h>
int main()
{ float fval=7.29; printf("%d n", (int)fval); return 0;
}

What will be the output of the program?

#include<stdio.h>
#include<math.h>
int main()
{ printf("%d, %d, %d n", sizeof(3.14f), sizeof(3.14), sizeof(3.14l)); return 0;
}

What will be the output of the program in 16 bit platform (Turbo C under DOS)?

#include<stdio.h> int main()
{ int fun(); int i; i = fun(); printf("%d n", i); return 0;
}
int fun()
{ _AX = 1990;
}

What will be the output of the program?

#include<stdio.h>
int reverse(int); int main()
{ int no=5; reverse(no); return 0;
}
int reverse(int no)
{ if(no == 0) return 0; else printf("%d,", no); reverse (no--);
}

What will be the output of the program?

#include<stdio.h>
void fun(int);
typedef int (*pf) (int, int);
int proc(pf, int, int); int main()
{ int a=3; fun(a); return 0;
}
void fun(int n)
{ if(n > 0) { fun(--n); printf("%d,", n); fun(--n); }
}

Point out the error in the program?

#include<stdio.h> /* Assume there is a file called 'file.c' in c: tc directory. */
int main()
{ FILE *fp; fp=fopen("c: tc file.c", "r"); if(!fp) printf("Unable to open file."); fclose(fp); return 0;
}

Which of the following statement is correct about the program?

#include<stdio.h> int main() { FILE *fp; char ch; int i=1; fp = fopen("myfile.c", "r"); while((ch=getc(fp))!=EOF) { if(ch == ' n') i++; } fclose(fp); return 0; } 

Which of the following statement is correct about the program?

#include<stdio.h> int main() { FILE *fp; char str[11], ch; int i=0; fp = fopen("INPUT.TXT", "r"); while((ch=getc(fp))!=EOF) { if(ch == ' n' || ch == ' ') { str[i]=' 0'; strrev(str); printf("%s", str); i=0; } else str[i++]=ch; } fclose(fp); return 0; } 

What will be the output of the program ?

#include<stdio.h> int main() { float a=3.15529; printf("%2.1f n", a); return 0; } 

Point out the correct statements about the program?

#include<stdio.h> int main() { FILE *fptr; char str[80]; fptr = fopen("f1.dat", "w"); if(fptr == NULL) printf("Cannot open file"); else { while(strlen(gets(str))>0) { fputs(str, fptr); fputs(" n", fptr); } fclose(fptr); } return 0; } 

What will be the output of the program ?

#include<stdio.h> int main() { int k=1; printf("%d == 1 is" "%s n", k, k==1?"TRUE":"FALSE"); return 0; } 

What will be the output of the program ?

#include<stdio.h>
char *str = "char *str = %c%s%c; main(){ printf(str, 34, str, 34);}"; int main()
{ printf(str, 34, str, 34); return 0;
}

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;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ FILE *ptr; char i; ptr = fopen("myfile.c", "r"); while((i=fgetc(ptr))!=NULL) printf("%c", i); return 0;
}

While calling the fprintf() function in the format string conversion specifier %s can be used to write a character string in capital letters.

The maximum combined length of the command-line arguments including the spaces between adjacent arguments is

Which of the following statements are correct about the program?

#include<stdio.h>
char *fun(unsigned int num, int base); int main()
{ char *s; s=fun(128, 2); s=fun(128, 16); printf("%s n",s); return 0;
}
char *fun(unsigned int num, int base)
{ static char buff[33]; char *ptr = &buff[sizeof(buff)-1]; *ptr = ' 0'; do { *--ptr = "0123456789abcdef"[num %base]; num /=base; }while(num!=0); return ptr;
}

What will be the output of the program?

#include<stdio.h> int main() { const c = -11; const int d = 34; printf("%d, %d n", c, d); return 0; } 

Which of the following statements are correct about the below C-program?

#include<stdio.h>
int main()
{ int x = 10, y = 100%90, i; for(i=1; i<10; i++) if(x != y); printf("x = %d y = %d n", x, y); return 0;
}

Which of the following sentences are correct about a for loop in a C program?

Which of the following statements are correct about the below program?

#include<stdio.h>
int main()
{ int n = 0, y = 1; y == 1 ? n=0 : n=1; if(n) printf("Yes n"); else printf("No n"); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ char *str; str = "%d n"; str++; str++; printf(str-2, 300); return 0;
}

Is this a correct way for NULL pointer assignment?
int i=0;
char *q=(char*)i;

What will be the output of the program if the array begins at 65472 and each integer occupies 2 bytes?

#include<stdio.h> int main() { int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 1, 7, 8, 9, 0}; printf("%u, %u n", a+1, &a+1); return 0; } 

What will be the output of the program ?

#include<stdio.h>
#include<string.h> int main()
{ char sentence[80]; int i; printf("Enter a line of text n"); gets(sentence); for(i=strlen(sentence)-1; i >=0; i--) putchar(sentence[i]); return 0;
}

What will be the output of the program ?

#include<stdio.h> struct course { int courseno; char coursename[25]; };
int main()
{ struct course c[] = { {102, "Java"}, {103, "PHP"}, {104, "DotNet"} }; printf("%d ", c[1].courseno); printf("%s n", (*(c+2)).coursename); return 0;
}

Point out the error in the program?

struct emp
{ int ecode; struct emp *e;
};

We want to test whether a value lies in the range 2 to 4 or 5 to 7. Can we do this using a switch?

If scanf() is used to store a value in a char variable then along with the value a carriage return( r) also gets stored it.

The way the break is used to take control out of switch and continue to take control of the beginning of the switch?

By default, the data type of a constant without a decimal point is int, whereas the one with a decimal point is a double.

A char variable can store either an ASCII character or a Unicode character.

Which of the following statements are correct about the below program?

#include<stdio.h>
int main()
{ int i = 10, j = 20; if(i = 5) && if(j = 10) printf("Have a nice day"); return 0;
}