A new optical disc format known as the Blue-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD?

  1. DVD supports Standard Definition video while BD supports High Definition video.
  2. Compare to a DVD, the BD format has several times more storage capacity.
  3. Thickness of BD is 2-4 mm while that of DVD is 1.2 mm.

Which of the statement(s) given above is/are correct?

[UPSC Civil Services Exam – 2011 Prelims]

(a) 1 only

(b) 1 and 2 only

(c) 2 and 3 only

(d) 1, 2 and 3


Answer: (b)        

Explanation:

Difference between Blu-Ray and DVD:

  • ​A standard DVD holds 4.7 gigabytes of data. On the other hand, a double-layer Blu-ray disc can hold a massive 50 GB of data. Hence, statement 2 is correct.
  • DVD supports Standard Definition video while BD supports High Definition video. A DVD is a standard definition device, Blu-Ray is made for HD. Hence, statement 1 is correct.
  • The DVD is made up of two discs of 0.6mm thickness i.e. total of 1.2 mm, Blue-ray disc also has a thickness of 1.2 mm. Hence, statement 3 is incorrect.

Consider the following statements:                                                                   The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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Consider the following statements:                                                         The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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