the CFG was actually
s->AB
A-> a| BaB
B->bbA

The false statement i guess was "This grammar doesnt produce a string
of 4 consecutive bs"


and 2 or 3 questions mainly focused on j&=j-1 guess this unsets the
rightmost set bit


pointer related questions were asked.One such was

(1)int arr[2][3]={{1,2,3},{4,5,6}};
int (*ptr)[3]=&a[0];
printf("(%d,%d)",(*ptr)[1],(*ptr)[2]);
ptr+=1;
printf("(%d,%d)",(*ptr)[1],(*ptr)[2]);

find the output???

(2) double full(double a)
{
    return (int)(a+0.5);
}

does this always work??

(3) int x=123,y=231;
    int t=0;
    int l;
    l=x^y;
    while(l)
    {
        t++;
        l&=l-1;
    }
    printf("%d",t);

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