Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

The binary equivalent of (64)10 is

  1. 11000000

  2. 1000000

  3. 1100000

  4. 1100010
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To convert decimal 64 to binary, repeatedly divide by 2: 64/2=32 R0, 32/2=16 R0, 16/2=8 R0, 8/2=4 R0, 4/2=2 R0, 2/2=1 R0, 1/2=0 R1. Reading remainders bottom-up: 1000000. This matches option B. Option A (128), C (192), and D (98) are incorrect.

Multiple choice general knowledge science & technology

In Boolean algebra, A. A=-----------

  1. A2

  2. A

  3. 0

  4. 1
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In Boolean algebra, the AND operation (often denoted by multiplication or dot) follows the idempotent law: A · A = A. This means any Boolean variable ANDed with itself equals itself. Unlike regular algebra where A × A = A^2, Boolean algebra has only two values (0 and 1), so 0·0=0 and 1·1=1, hence A·A=A. Options A, C, and D violate this fundamental law.

Multiple choice general knowledge science & technology

Let's say you need to know how many dollars are in a British pound. Which of the following queries would you use?

  1. how many dollars in a pound

  2. 1 pound in dollars

  3. pounds to dollars

  4. Any of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Google is smart enough to understand currency conversion queries in natural language. All three options - 'how many dollars in a pound', '1 pound in dollars', and 'pounds to dollars' - will return the current exchange rate. Google's search algorithm handles various phrasing styles.

Multiple choice general knowledge science & technology

Lets say you need to know what 2 times 6, divided by 3, squared, is. Which of the following queries would you use? (the answer is 16)

  1. calculate:((2*6) /3)^2

  2. ((2*6) /3)^2

  3. show results:((2*6) /3)^2

  4. You can't do math in Google.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Google can do math directly in the search bar. Just type the expression as-is: ((2*6)/3)^2. You don't need special operators like 'calculate:' or 'show results:'. Option D is incorrect - Google handles mathematical calculations natively.

Multiple choice general knowledge science & technology

How do you search for sites related to a particular site, for instance to Yale's home page?

  1. like:www.yale.edu

  2. showlike:www.yale.edu

  3. related:www.yale.edu

  4. link:www.yale.edu
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The 'related:' search operator finds sites similar to the specified URL. 'like:' and 'showlike:' aren't valid Google operators. The 'link:' operator shows pages that link TO the site, not related sites.

Multiple choice general knowledge science & technology

How do you search for all pages that have a link to a particular site, for example all sites that have a link to whitehouse.gov?

  1. show links"www.whitehouse.gov"

  2. link:www.whitehouse.gov

  3. link"www.whitehouse.gov"

  4. references:www.whitehouse.gov
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The 'link:' operator finds all pages that contain links to the specified URL. 'show links' isn't a valid operator syntax. Option C is missing the colon, and 'references:' isn't a Google search operator.

Multiple choice general knowledge science & technology

The scientist who first discovered that the earth round the sun?

  1. Newton

  2. Dalton

  3. Einstein

  4. Copernicus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nicolaus Copernicus was the astronomer who first formulated the heliocentric theory that the Earth revolves around the sun, published in his work 'De revolutionibus orbium coelestium' (1543). This revolutionary idea challenged the geocentric model that had dominated Western thinking for over 1400 years. While earlier thinkers like Aristarchus had similar ideas, Copernicus developed the first comprehensive mathematical model.