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Trắc Nghiệm Ngôn Ngữ Lập Trình C ( English ) - Bài 58
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1-
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malloc() allocates memory from the heap and not from the stack.
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A -
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True
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B -
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False
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2-
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malloc() returns a NULL if it fails to allocate the requested memory.
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A -
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True
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B -
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False
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3-
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malloc() successfully allocates memory it returns the number of bytes it has allocated.
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A -
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True
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B -
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False
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4-
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Can I increase the size of dynamically allocated array?
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A -
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Yes
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B -
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No
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5-
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Can I increase the size of statically allocated array?
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A -
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Yes
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B -
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No
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6-
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When we dynamically allocate memory is there any way to free memory during run time?
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A -
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Yes
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B -
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No
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7-
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What will be the output of the program?
#include
#include
void fun(char *msg, ...);
int main()
{
fun("IndiaBIX", 1, 4, 7, 11, 0);
return 0;
}
void fun(char *msg, ...)
{
va_list ptr;
int num;
va_start(ptr, msg);
num = va_arg(ptr, int);
num = va_arg(ptr, int);
printf("%d", num);
}
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A -
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IndiaBIX 1 7 11 0
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B -
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1
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C -
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4
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D -
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7
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8-
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What will be the output of the program?
#include<stdio.h>
#include<stdarg.h>
void fun1(char, int, int *, float *, char *);
void fun2(char ch, ...);
void (*p1)(char, int, int *, float *, char *);
void (*p2)(char ch, ...);
int main()
{
char ch='A'; int i=10;
float f=3.14; char *p="Hello";
p1=fun1;
p2=fun2;
(*p1)(ch, i, &i, &f, p);
(*p2)(ch, i, &i, &f, p);
return 0;
}
void fun1(char ch, int i, int *pi, float *pf, char *p)
{
printf("%c %d %d %f %s \n", ch, i, *pi, *pf, p);
}
void fun2(char ch, ...)
{
int i, *pi; float *pf; char *p;
va_list list;
printf("%c ", ch);
va_start(list, ch);
i = va_arg(list, int);
printf("%d ", i);
pi = va_arg(list, int*);
printf("%d ", *pi);
pf = va_arg(list, float*);
printf("%f ", *pf);
p = va_arg(list, char *);
printf("%s", p);
}
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A -
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A 10 3.14
A 10 3.14
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B -
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A 10 10 3.140000 Hello
A 10 10 3.140000 Hello
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C -
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A 10 Hello
A 10 Hello
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D -
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Error
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9-
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What will be the output of the program?
#include<stdio.h>
#include<stdarg.h>
void dumplist(int, ...);
int main()
{
dumplist(2, 4, 8);
dumplist(3, 6, 9, 7);
return 0;
}
void dumplist(int n, ...)
{
va_list p; int i;
va_start(p, n);
while(n-->0)
{
i = va_arg(p, int);
printf("%d", i);
}
va_end(p);
printf("\n");
}
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A -
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2 4
3 6
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B -
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2 4 8
3, 6, 9, 7
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C -
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4 8
6 9 7
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D -
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1 1 1
1 1 1 1
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10-
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What will be the output of the program?
#include<stdio.h>
#include<stdarg.h>
void display(int num, ...);
int main()
{
display(4, 'A', 'B', 'C', 'D');
return 0;
}
void display(int num, ...)
{
char c, c1; int j;
va_list ptr, ptr1;
va_start(ptr, num);
va_start(ptr1, num);
for(j=1; j<=num; j++)
{
c = va_arg(ptr, int);
printf("%c", c);
c1 = va_arg(ptr1, int);
printf("%d\n", c1);
}
}
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A -
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A, A0
B, B0
C, C0
D, D
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B -
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A, a0
B, b0
C, c0
D, d
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C -
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A, 650
B, 660
C, 670
D, 68
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D -
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A, 0
B, 00
C, 00
C, 0
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[Người đăng: Thành Lãm - ST] |
