Science and Technology

Consider the following statements:

I. Indian Railways have prepared a National Rail Plan (NRP) to create a future ready railway system by 2028.
II. ‘Kavach’ is an Automatic Train Protection system developed in collaboration with Germany.
III. ‘Kavach’ system consists of RFID tags fitted on track in station section.

Which of the statements given above are not correct?

Consider the following communication technologies :
1. Closed-circuit Television
2. Radio Frequency Identification
3. Wireless Local Area Network
Which of the above are considered Short-Range devices/technologies?

With reference to Visible Light Communication (VLC) technology, which of the following statements are correct?
(1) VLC uses electromagnetic spectrum wavelengths 375 to 780 nm.
(2) VLC is known as long-range optical wireless communication.
(3) VLC can transmit large amounts of data faster than Bluetooth,
(4) VLC has no electromagnetic interference.
Select the correct using the code given below:

In the context of wearable technology, which of the following tasks is/are accomplished by wearable devices?

1. Location identification of a person
2. Sleep monitoring of a person
3. Assisting the hearing impaired person

Select the correct answer using the code given below.

With reference to communication technologies, what is/are the difference / differences between LTE (Long-Term Evolution) and VoLTE (Voice over Long-Term Evolution)?

1. LTE ‘is commonly marketed as 3G and VoLTE is commonly marketed as advanced 3G.
2. LTE is data-only technology and VoLTE is voice-only technology.

When the alarm of your smartphone rings in the morning, you wake up and tap it to stop the alarm which causes your geyser to be switched on automatically. The smart mirror in your bathroom shows the day’s weather and also indicates the level of water in your overhead tank. After you take some groceries from your refrigerator for making breakfast, it recognises the shortage of stock in it and places an order for the supply of fresh grocery items. When you step’ out of your house and lock the door, all lights, fans, geysers and AC machines get switched off automatically. On your way to office, your car warns you about
traffic congestion ahead and suggests an alternative route, and if you are late for a meeting, it sends a message to your office accordingly.

In the context of emerging communication technologies, which one of the following terms best applies to the above scenario?

In which of the following areas can GPS technology be used ?

1. Mobile phone operations
2. Banking operations
3. Controlling the power grids
Select the correct answer using the code given below :