Trắc Nghiệm Ngôn Ngữ Lập Trình C ( English ) - Bài 50
1-
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Assunming, integer is 2 byte, What will be the output of the program?
#include<stdio.h>
int main()
{
printf("%x\n", -1>>1);
return 0;
}
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A -
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ffff
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B -
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0fff
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C -
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0000
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D -
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fff0
|
2-
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If an unsigned int is 2 bytes wide then, What will be the output of the program ?
#include<stdio.h>
int main()
{
unsigned int m = 32;
printf("%x\n", ~m);
return 0;
}
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A -
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ffff
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B -
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0000
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C -
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ffdf
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D -
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ddfd
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3-
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Assuming a integer 2-bytes, What will be the output of the program?
#include<stdio.h>
int main()
{
printf("%x\n", -1<<3);
return 0;
}
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A -
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ffff
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B -
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fff8
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C -
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0
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D -
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-1
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4-
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If an unsigned int is 2 bytes wide then, What will be the output of the program ?
#include<stdio.h>
int main()
{
unsigned int a=0xffff;
~a;
printf("%x\n", a);
return 0;
}
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A -
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ffff
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B -
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0000
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C -
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00ff
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D -
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ddfd
|
5-
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What will be the output of the program?
#include<stdio.h>
int main()
{
unsigned char i = 0x80;
printf("%d\n", i<<1);
return 0;
}
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A -
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0
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B -
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256
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C -
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100
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D -
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80
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6-
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What will be the output of the program?
#include<stdio.h>
int main()
{
printf("%d >> %d %d >> %d\n", 4 >> 1, 8 >> 1);
return 0;
}
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A -
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4 1 8 1
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B -
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4 >> 1 8 >> 1
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C -
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2 >> 4 Garbage value >> Garbage value
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D -
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2 4
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7-
|
What will be the output of the program?
#include<stdio.h>
int main()
{
char c=48;
int i, mask=01;
for(i=1; i<=5; i++)
{
printf("%c", c|mask);
mask = mask<<1;
}
return 0;
}
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A -
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12400
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B -
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12480
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C -
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12500
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D -
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12556
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8-
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What will be the output of the program?
#define P printf("%d\n", -1^~0);
#define M(P) int main()\
{\
P\
return 0;\
}
M(P)
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A -
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1
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B -
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0
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C -
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-1
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D -
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2
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9-
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What will be the output of the program ?
#include<stdio.h>
int main()
{
int i=32, j=0x20, k, l, m;
k=i|j;
l=i&j;
m=k^l;
printf("%d, %d, %d, %d, %d\n", i, j, k, l, m);
return 0;
}
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A -
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0, 0, 0, 0, 0
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B -
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0, 32, 32, 32, 32
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C -
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32, 32, 32, 32, 0
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D -
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32, 32, 32, 32, 32
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10-
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What will be the output of the program?
#include<stdio.h>
int main()
{
printf("%d %d\n", 32<<1, 32<<0);
printf("%d %d\n", 32<<-1, 32<<-0);
printf("%d %d\n", 32>>1, 32>>0);
printf("%d %d\n", 32>>-1, 32>>-0);
return 0;
}
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A -
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Garbage values
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B -
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64 32 0 32 16 32 0 32
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C -
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All zeros
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D -
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8 0 0 0 32 0 0 16
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[Người đăng: Thành Lãm - ST]
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