A bulb in a staircase has two switches, one switch being at the ground floor and the other one at the
first floor. The bulb can be turned ON and also can be turned OFF by any one of the switches
irrespective of the state of the other switch. The logic of switching of the bulb resembles
(A) an AND gate (B) an OR gate (C) an XOR gate (D) a NAND gate

• C...
  go through the truth table simply.. cosider 0-off ,1- on
  
  then ,
  bulb state
  1. off off off
  2 on off on
  3 off on on
  4 on on off
• 10 years agoHelpfull: Yes(2) No(0)