Here is a listing of C interview questions along with answers, explanations and/or solutions: ⬇️
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What will be the output of the following C code? |
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1. #define MSSG "Hello world\n"
printf (MSSG);[ ] Answer : Hello world [ define is pre processor statement in C Language. All statements prefixed with # are preprocessor statements ]
2. Printf("indian\b\n");
Printf("new\rDelhi\n");[ ] Answer : [\b is a backspace escape sequence. /r is "carriage return" character. It will move the cursor to the left side of the screen but will not move down a line.] indian� new Delhi
3. int a=11;
Printf("a=%d\t",a);
Printf("a=%o\t",a);
Printf("a=%x\t",a);
Printf("a=%x\n",a); [ ] Answer : a=11 a=13 a=b a=b
4. int a=4000000000;
Unsigned int b=4000000000;
Printf ("a=%d,b=%u\n",a,b);
Printf("a=%d,b=%u\n",INT_MAX,UINT_MAX);[ ] Answer : a=-294967296,b=4000000000 a=2147483647,b=4294967295
5. char ch;
Printf("Enter a character:");
Scanf("%c",&ch);
Printf("%d\n",ch);[ ] Answer : Enter a character:a,97
6. float b=123.1265;
Printf("%f\t",b);
Printf("%.2f\t",b);
Printf("%.3f\n",b);[ ] Answer : 123.126503 123.13 123.127
7.
int a=625,b=2394,c=12345;
printf("%5d,%5d,%5d\n",a,b,c);
printf("%3d,%4d,%5d\n",a,b,c);[ ] Answer :[2 space Gap]625,[1space]2394,12345 625,2394,12345
8.
int a=98;
char ch='c';
Printf("%c,%d\n",a,ch);[ ] Answer: b,99
9. float a1,b1,a2,b2,a3,b3;
a1=2;
b1=6.8;
a2=4.2;
b2=3.57;
a3=9.82;
b3=85.673;
Printf("%3.1f,%4.2f\n",a1,b1);
Printf("%5.1f,%6.2f",a2,b2);
Printf("%7.1f,%8.2f\n",a3,b3);[ ] Answer : 2.0,6.80 4.2, 3.57 9.8, 85.67
10.
Printf("%10s\n","India");
Printf("%4s\n","India");
Printf("%.2s\n","India");
Printf("%5.2s\n","India");[ ] Answer : India India In In
1. double f1 = 0.1;
if (f1 == 0.1)
printf("equal\n");
else
printf("not equal\n"); [ ] Answer : Not Equal [ 0.1 is by default represented as a Double ] Replace Float into Double to Get your desired answer
2. j = 10;
printf("%d\n", j++); [ ] Answer : Compile time error: " j " is undeclared [ use int for result ]
3. for (int k = 0; k < 10; k++);
return 0; [ ] Answer : Depends on C standerd Set by the Compiler
4. int a =9;
if (a==5)
printf ("a is five\t");
else
("a is not five\t");
printf("Value of a is %d\n",a);[ ] Answer : a is not five Value of a is 9
5. int a=20,b=3;
if(a<10)
a=a-5;
b=b+5;
printf ("a=%d b=%d\n",a,b);[ ] Answer : a=20 b=3
6. int a=9,b=0,c=0;
if(!a<10 && !b||c)
printf ("My name is Akash\n");
else
printf ("My Surname is Singh\n");
return 0; [ ] Answer : My name is Akash [ True =1,False=0 <!a=!true=false so !a<10 is true b=0 so !b=!false=true where c=0 means false ]
7.
int i=1,j=9;
if (i>=5 && j<5)
i=j+2;
printf ("%d\n",i);
return 0; [ ] Answer : 1[True && False is False which is 0]
8.
int j,k,i;
for (k=1;k<=3;k++)
{
for (j=1;j<=6;j++)
{
for(i=1;i<=6;i++)
printf("*");
printf("\n");
}
printf("\n");
}
return 0; [ ] Answer: Compile it on Ideone.com or any other IDE
9. int i ;
for (i=1;i<5;i++);
printf ("%d ",i);
i=10;
while (i<5);
printf ("%d",i++);
i=0;
while (i<5)
printf ("%d",i++);
return 0; [ ] Answer : 5 10 01234 [ First For loop Executed Succesfully {5} , 2nd While Loop not executed but due to printf function,value of i printed once , 3rd While loop executed successfully , and it will Return 0 1 2 3 4 ]
10.
int x = 5;
if (x < 1)
printf("hello");
if (x == 5)
printf("hi");
else
printf("no");
}[ ] Answer : hi
11. int a = 0, i = 0, b;
for (i = 0;i < 5; i++)
{
a++;
continue;
}[ ] Answer : 5
12. int a = 0, i = 0, b;
for (i = 0;i < 5; i++)
{
a++;
if (i == 3)
break;
}[ ] Answer: 4
13. int i = 0, j = 0;
for (i = 0;i < 5; i++)
{
for (j = 0;j < 4; j++)
{
if (i > 1)
break;
}
printf("Hi \n");
}[ ] Answer: Hi is printed 5 times
14. int i = 0;
int j = 0;
for (i = 0;i < 5; i++)
{
for (j = 0;j < 4; j++)
{
if (i > 1)
continue;
printf("Hi \n");
}
}[ ] Answer : Hi is printed 8 times
15. int i = 0;
for (i = 0;i < 5; i++)
if (i < 4)
{
printf("Hello");
break;
}[ ] Answer : Hello
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