ISRO 2023 Quiz 31

Which of the following is the slowest mode of input?

What is the possible number of reflexive relations on a set of 5 elements?

The grammar S → aSb | bSa | SS | € is :

What is the output of the following program?

#include
#define MUL(a,b) a*b
#define pow(a) a*a

int main()
{
   int a = 4;
   int b = 3;
   printf("%d", MUL(MUL(a+1,b), pow(b+1)));
}

Seven executives P, Q, R, S, T, U, and W reach office in a particular sequence.

U reaches immediately before P but does not immediately follow S. T reaches before R but not immediately after P. Q reaches few seconds after the first person.

Who ranks fourth in the sequence of reaching office?