Suppose there are three light switches outside a room. Inside is a single light bulb, controlled by one of the three switches. You need to determine which switch operates the bulb. You can turn the switches on and off as many times as you wish (they are all off to begin with), but may only enter the room once. There is no one there to help you. The door to the room is closed, and there are no windows, so you cannot see inside. How can you discover which switch operates the bulb?
Submitted by: AdministratorDo the following steps:
☛ 1. Turn ON two switches, and leave one OFF.
☛ 2. Wait a few minutes.
☛ 3. Turn one switch from ON to OFF. One is now ON and two are OFF
☛ 4. Enter the room. - If the light is ON, it is controlled by the switch you left ON. - If the light bulb is OFF, touch it. If it is warm it is controlled by the switch you turned ON and OFF. If it is cold, it is controlled by the switch you never turned on.
Submitted by: Administrator
☛ 1. Turn ON two switches, and leave one OFF.
☛ 2. Wait a few minutes.
☛ 3. Turn one switch from ON to OFF. One is now ON and two are OFF
☛ 4. Enter the room. - If the light is ON, it is controlled by the switch you left ON. - If the light bulb is OFF, touch it. If it is warm it is controlled by the switch you turned ON and OFF. If it is cold, it is controlled by the switch you never turned on.
Submitted by: Administrator
Read Online 3g Manager Job Interview Questions And Answers
Top 3g Manager Questions:
☺ | If you have seven white socks and nine black socks in a drawer, how many socks do you have to pull out blindly in order to ensure that you have a matching pair? |
☺ | How did you find out about this job Regarding 3g Manager? What do you know about the job? |
☺ | Tell me one thing about yourself you wouldn't want me to know? |
☺ | What negative thing would your last boss say about you? |
☺ | If I talked to your three biggest fans, who would they be and why? |
Top Mobile Technologies Categories
☺ | Android Interview Questions. |
☺ | Wireless Communication Interview Questions. |
☺ | 3G Interview Questions. |
☺ | iPhone Interview Questions. |
☺ | Mobile App Architect Interview Questions. |