Code HS Questions and Answers
Graded A+
What is data abstraction? ✔✔The process of simplifying complicated data into manageable
chunks
Which of the following are examples of encoding information? ✔✔Representing fast
...
Code HS Questions and Answers
Graded A+
What is data abstraction? ✔✔The process of simplifying complicated data into manageable
chunks
Which of the following are examples of encoding information? ✔✔Representing fast food meals
as numbers on the menu. For example a number 1 represents a hamburger.
Assigning a numeric value to every area of a region, for example zip codes in the United States
Assigning a number to every character of the alphabet so we can represent sentences as series of
simple digits.
What is the number base of the binary number system? ✔✔2
In the binary value 1002, what is the place value of the 1? ✔✔4s place
How many possible values can be created with only 2 bits? ✔✔4
How many bits are used to encode a character according to the ASCII encoding scheme? ✔✔8
bits
(ex: 0100 0001 encodes 'A')
What is a pixel? ✔✔A single tiny dot, or square, of color in a digital image.
What is the value of 9F16 in binary? ✔✔1001 11112
What is the value of F16 in decimal? ✔✔15(10)
What are the 3 color channels that make up a pixel according to the RGB color scheme? ✔✔Red,
Green, and Blue
What is the range of values (expressed in decimal) that each color channel can have? ✔✔(0)10 -
255(10)
Which of the following pixels has a color value of #ff0000 (expressed in hexadecimal) ✔✔(Red
Pixel)
Which of the following instructions would brighten a pixel? Assume R is the red value of the
pixel, G is the green value, and B is the blue value. ✔✔R = Math.min(R + 50, 255);
G = Math.min(G + 50, 255);
B = Math.min(B + 50, 255);
Which of the following describes the instructions for a general image filter? ✔✔Given an image:
for every (x, y) coordinate in the image
Get the current pixel at (x, y)
Modify the pixel according to a function
Update image at (x, y) with this modified pixel
Which of the following functions properly removes all green and blue from a pixel and returns
the modified pixel? ✔✔var RED = 0;
var GREEN = 1;
var BLUE = 2;
function removeGreenAndBlue(pixel) {
pixel[GREEN] = 0;
pixel[BLUE] = 0;
return pixel;
}
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