Khan Academy Computers exam 2022/2023 with 100% correct answers
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Course
Khan Academy
Institution
Khan Academy
Nikolas is looking at the files for a project he's working on:
Which file was modified the longest time ago?
Which file is the largest?
Which file type appears the most in this listing?
png
Sort these component from high-level (at the top) to low-level (at the bottom):
CPU...
khan academy computers exam 20222023 with 100 correct answers
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Khan Academy Computers
Nikolas is looking at the files for a project he's working on:
Which file was modified the longest time ago?
Which file is the largest?
Which file type appears the most in this listing? correct answerpause.svg
tests.zip
png
Sort these component from high-level (at the top) to low-level (at the bottom): correct answerCPU
logic circuit
logic gate
transistor
8
1,2,2,2,1
1,2,2,2,1
8
8
2,4,2
1,1,4,1,1
8
, In this RLE scheme, the numbers represent alternating runs of black and white pixels and the first
number in each line represents a run of white pixels.
What does this icon look like? correct answerA frowning face
Peter wants to make a computer, but doesn't have the money to buy a CPU. He only has the money for
a keyboard, RAM (Random Access Memory), and monitor.
Why is the CPU important? correct answerWithout a CPU, the computer can't process the data that
comes from the keyboard.
Here's the output from a byte pair encoding:
Ze mXe Zat yB rFd, Ze mXe Zings yB wiJ know. Ze mXe Zat yB lFrn, Ze mXe places yB'J go
Here's the replacements table:
original replacement
th Z
or X
ou B
ea F
ll J
Decode the compressed string to discover the original string, a quote from Dr. Seuss: correct answerthe
more that you read the more things you will know. the more that you learn the more places youll go
Consider these files:
A 3-second audio recording of a baby's first word.
A 30-second video recording of a baby's first steps.
Is it possible for the 30-second video recording to have a smaller file size than the 3-second audio
recording? correct answerYes, if the 30-second video is compressed with a lossy compression algorithm.
Kevin is entering the JS1K contest, a contest to write an interesting program in just 1K of JavaScript
code. He's hoping he can rewrite a program that's currently 1MB and enter that for the contest.
If he succeeds, how much smaller will his new program be? correct answerAround 1/1000 of the original
size.
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