Q75 · UPSC Prelims 2019 · Set A · Science and Technology

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With reference to communications 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.Select the correct answer using the code given below

A 1 only
B 2 only
C Both 1 and 2
D Neither 1 nor 2

Correct answer: (d) Neither 1 nor 2

Explanation

  1. A

    1 only

    (a) 1 only. Statement 1 is false: LTE is marketed as 4G, not 3G, and VoLTE is voice-over-4G, not “advanced 3G”. Not the key.

  2. B

    2 only

    (b) 2 only. Statement 2 is false: LTE carries data (and, with VoLTE, packet voice). VoLTE is not a voice-only technology that replaces data. Not the key.

  3. C

    Both 1 and 2

    (c) Both 1 and 2. Both differences as worded are false. Not the key.

  4. D

    Neither 1 nor 2

    (d) Neither 1 nor 2. LTE is 4G data; VoLTE is voice (and SMS) as packets on the LTE bearer, so you can use data during a call. Neither listed “difference” is right. That is the official key.

Summary. Official key is (d). LTE is the 4G radio standard, commonly sold as 4G LTE. VoLTE puts voice on that same IP pipe; it is not a separate voice-only or 3G product. Both statements fail. Honour (d).

Same topic · past papers

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These previous-year questions sit on the same topic. Open one to practise the earlier ask.

  1. 2020 · Q47 · General Studies · 2 marks

    Which of the following statements are correct regarding the general difference between plant and animal cells? 1. Plant cells have cellulose cell walls whilst animal cells do not. 2. Plant cells do not have plasma membrane unlike animal cells which do. 3. Mature plant cell has one large vacuole whilst animal cell has many small vacuoles. Select the correct answer using the code given below:

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