engineering recuitment GATE ECE 2023-24 Test Series Digital Electronics Logic Gates and Boolean Algebra Boolean Functions
The Elevator door should open if the elevator is stopped and is level with the floor, and the timer has not expired, ‘OR’ if the elevator is stopped and is level with the floor, and a button is pressed. If
D→ Elevator door opens
S→ Elevator is stopped
F→ Level with the floor
T→ Timer has expired
B→ Button Pressed
Which of the Boolean expression represents the above condition:1
D = SFT̅ + SFB
2
D = SFT̅B
3
D = SF + T̅B
4
D = (S + F) (T̅B)