Which bitwise operator is suitable for turning on a particular bit in a number?

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Which bitwise operator is suitable for turning on a particular bit in a number?

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1) What is the output of this C code?

#include <stdio.h>
int main()
{
int x = 2, y = 1;
x *= x + y;
printf("%d\n", x);
return 0;
}

2) What should be the value of i and k at the end of the following program segments?

 int i,j,k;
{
j=5;
i=2*j/2;
k=2*(j/2);
}

3) What is the output of this C code?

 #include <stdio.h>
int main()
{
int a = 10, b = 5, c = 5;
int d;
d = a == (b + c);
printf("%d", d);
}

4) Operator precedence determines which operator:

5) Consider the following program fragment:

  main()
{
int a,b,c;
b=2;
a=2*(b++);
c=2*(++b);
}
Which one of the given answers in correct?

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