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AP Computer Science A Videos 108 videos
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AP Computer Science 1.4 Review of the Basics 183 Views
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Description:
AP Computer Science: Review of the Basics Drill 1, Problem 4. What is 11001 (base 2) in base 10?
Transcript
- 00:00
Thank you We sneak and here's your smoke du jour
- 00:05
You know there's an old saying there ten types of
- 00:08
people in the world those who understand binary and those
- 00:11
who don't and a about eight others Okay what is
- 00:17
one one oo one bass two in based hand And
Full Transcript
- 00:21
here your potential answers All right Okay So here we
- 00:26
go At first thought it can seem pretty out there
- 00:30
Well it turns out your computer does it all the
- 00:32
time Every piece of information and computer deals with whether
- 00:35
it's numbers text or a photo of grandma is stored
- 00:38
in memory as a huge pile of ones and zeros
- 00:41
Well wonders of technology aside let's read a small base
- 00:44
to number and converted to base ten ourselves As we
- 00:47
know each one or zero is a bit And each
- 00:50
group of eight bit is a fight in a bite
- 00:54
Not everyone in zero is created equal Each bit in
- 00:57
a bite carries a different value Well the first bit
- 01:00
to go from right toe laugh when counting these things
- 01:02
represents the value of one Next is two and four
- 01:06
eight sixteen thirty two six four seven one twenty eight
- 01:10
We just add up the values that ones and you
- 01:12
can get any numeric value anywhere from zero to two
- 01:15
hundred fifty five into gold base ten the bite shown
- 01:18
here one one one zero one zero zero one equals
- 01:23
two hundred thirty three So here's the one one zero
- 01:26
zero one we were given for this question We've only
- 01:28
been given five bits out of this bike so the
- 01:31
trailing space gives filled in with zeros Well that first
- 01:35
bit represents one in the two and four positions We've
- 01:38
got zeros which don't count The fourth and fifth bits
- 01:41
with values of eight and sixteen are ones and one
- 01:45
plus a plus sixteen Well in california that twenty five
- 01:48
which is answered the knot too complicated Right so give 00:01:52.39 --> [endTime] yourself one of thumbs up Whoa
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