C Quiz - 112

Question 1

Pick the best statement for the below program:

C

#include \"stdio.h\"

int main()
{
 struct {int a[2];} arr[] = {{1},{2}};

 printf(\"%d %d %d %d\",arr[0].a[0],arr[0].a[1],arr[1].a[0],arr[1].a[1]);

 return 0;
}

• Compile error because arr has been defined using struct type incorrectly. First struct type should be defined using tag and then arr should be defined using that tag.
• Compile error because apart from definition of arr, another issue is in the initialization of array of struct i.e. arr[].
• Compile error because of initialization of array of struct i.e. arr[].
• No compile error and it’ll print 1 2 0 0
• No compile error and it’ll print 1 0 2 0

Question 2

Pick the best statement for the below program:

C

#include \"stdio.h\"

int main()
{
 struct {int a[2], b;} arr[] = {[0].a = {1}, [1].a = {2}, [0].b = 1, [1].b = 2};

 printf(\"%d %d %d and\",arr[0].a[0],arr[0].a[1],arr[0].b);
 printf(\"%d %d %d\\n\",arr[1].a[0],arr[1].a[1],arr[1].b);

 return 0;
}

• Compile error because struct type (containing two fields i.e. an array of int and an int) has been specified along with the definition of array arr[] of this struct type.
• Compile error because of incorrect syntax for initialization of array arr[].
• No compile error and two elements of arr[] would be defined and initialized. Output would be “1 0 1 and 2 0 2”.
• No compile error and two elements of arr[] would be defined and initialized. Output would be “1 X 1 and 2 X 2” where X is some garbage random number.

Question 3

Pick the best statement for the below program: 

C

#include <stdio.h>

int main()
{
    struct {
        int i;
        char c;
    } myVar = {.i = 100, .c = 'A'};
    
    printf("%d %c", myVar.i, myVar.c);
    
    return 0;
}

• Compile error because struct type (containing two fields of dissimilar type i.e. an int and a char) has been mentioned along with definition of myVar of that struct type.

• Compile error because of incorrect syntax of initialization of myVar. Basically, member of operator (i.e. dot .) has been used without myVar.

• Compile error for not only B but for incorrect order of fields in myVar i.e. field c has been initialized first and then field i has been initialized.

• No compile error and it’ll print 100 A.

Question 4

Pick the best statement for the below program: 

C

#include <stdio.h>

int main()
{
    union {
        int i1;
        int i2;
    } myVar = {.i2 = 100};
    
    printf("%d %d", myVar.i1, myVar.i2);
    
    return 0;
}

• Compile error due to incorrect syntax of initialization.

• No compile error and it’ll print “0 100”.

• No compile error and it’ll print “100 100”.

Question 5

Consider the code fragment written in JAVA below : 

Java

void f (int n)
{ 
  if (n <=1)  {
   System.out.print(n);
  }
  else {
   f (n/2);
   System.out.print(n%2);
  }
}

What does f(173) print?

• 010110101

• 010101101

• 10110101

• 10101101