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UPSC 2011: A new optical disc format known as the Blu-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. Compared 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 statements given above is/are correct?
(a)1 only
(b)1 and 2 only
(c)2 and 3 only
(d)1, 2 and 3
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Not attemptedCorrect Answer: (b) 1 and 2 only
DVD-Video is limited to standard-definition (480/576p) whereas Blu-ray supports high-definition (up to 1080p) video, and a single-layer Blu-ray holds 25 GB versus 4.7 GB on a DVD, so statements 1 and 2 are correct. Both discs are 1.2 mm thick, not 2.4 mm for Blu-ray, so statement 3 is wrong; therefore the correct choice is 1 and 2 only. ([blu-ray.com](https://www.blu-ray.com/faq/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2011 Science & Technology question?▼
The correct answer is option (b): 1 and 2 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Computer & Information Technology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2011, GS Paper 1, as Question 69. It falls under Science & Technology > Computer & Information Technology.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Computer & Information Technology?▼
UPSC has asked 50 questions from Computer & Information Technology (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.