APCSP Unit 1 Formative 1

What is the number base of the binary number system?

• 10

• 2

• 1

• 0

In the binary value 100₂, what is the place value of the 1?

• 1. 100s place

• 1. 2s place

• 1. 4s place

• 1. 1s place

Question: 1

What is the value of 14₁₀ in binary?

• 1. 
     

     101₂

• 1. 1101₂

• 1. 1110₂

• 1. 10000₂

1. How many possible values can be created with only 2 bits?

   Check

• 1. 4

• 1. 2

• 11

• 3

How many bits are used to encode a character according to the ASCII encoding scheme?

• 1. 2 bits
     (ex: 10 encodes ‘A’)

• 1. 4 bits
     (ex: 1011 encodes ‘A’)

• 1. 6 bits
     (ex: 10 0110 encodes ‘A’)

• 1. 8 bits
     (ex: 0100 0001 encodes ‘A’)

What is a pixel?

• 1. A grid of several colors in a digital image.

• 1. A single tiny dot, or square, of color in a digital image.

• 1. Another name for a digital image.

• 1. A small picture.

What is the value of F₁₆ in decimal?

• 1. 16₁₀

• 1. 15₁₀

• 1. 6₁₀

• 1. 5₁₀

What is the value of 9F₁₆ in binary?

• 1. 1001 1111₂

• 1. 1111 1001₂

• 1. 0111 1000₂

• 1. 1100 0011₂

What are the 3 color channels that make up a pixel according to the RGB color scheme?

• 1. Red, Green, and Blue

• 1. Red, Blue, and Yellow

• 1. White, Black, and Gray

• 1. Cyan, Magenta, and Yellow

What is the range of values (expressed in decimal) that each color channel can have?

• 1. 1₁₀ - 256₁₀

• 1. 0₁₀ - 255₁₀

• 1. -128₁₀ - 127₁₀

• 1. 0₁₀ - 127₁₀