Code HS || PRACTICE QUESTIONS WITH CORRECT
ANSWERS!!
What is data abstraction? correct answers The process of simplifying complicated data into
manageable chunks
Which of the following are examples of encoding information? correct answers 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? correct answers 2
In the binary value 1002, what is the place value of the 1? correct answers 4s place
How many possible values can be created with only 2 bits? correct answers 4
How many bits are used to encode a character according to the ASCII encoding scheme?
correct answers 8 bits
(ex: 0100 0001 encodes 'A')
What is a pixel? correct answers A single tiny dot, or square, of color in a digital image.
What is the value of 9F16 in binary? correct answers 1001 11112
What is the value of F16 in decimal? correct answers 15(10)
What are the 3 color channels that make up a pixel according to the RGB color scheme?
correct answers Red, Green, and Blue
What is the range of values (expressed in decimal) that each color channel can have? correct
answers (0)10 - 255(10)
Which of the following pixels has a color value of #ff0000 (expressed in hexadecimal)
correct answers (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. correct answers 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? correct answers
Given an image:
for every (x, y) coordinate in the image
ANSWERS!!
What is data abstraction? correct answers The process of simplifying complicated data into
manageable chunks
Which of the following are examples of encoding information? correct answers 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? correct answers 2
In the binary value 1002, what is the place value of the 1? correct answers 4s place
How many possible values can be created with only 2 bits? correct answers 4
How many bits are used to encode a character according to the ASCII encoding scheme?
correct answers 8 bits
(ex: 0100 0001 encodes 'A')
What is a pixel? correct answers A single tiny dot, or square, of color in a digital image.
What is the value of 9F16 in binary? correct answers 1001 11112
What is the value of F16 in decimal? correct answers 15(10)
What are the 3 color channels that make up a pixel according to the RGB color scheme?
correct answers Red, Green, and Blue
What is the range of values (expressed in decimal) that each color channel can have? correct
answers (0)10 - 255(10)
Which of the following pixels has a color value of #ff0000 (expressed in hexadecimal)
correct answers (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. correct answers 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? correct answers
Given an image:
for every (x, y) coordinate in the image
