AP Computer Science Principles Study Guide

You have a coordinate grid that is 75x75. Assuming that you encode the x and y coordinate as separate numbers, what is the minimum number of bits that you will need to encode a coordinate in that space?

• 16

• 14

• 13

• 10

What is the minimum number of bits you need to encode the 26 letters of the alphabet plus a space?

• 2 bits

• 3 bits

• 4 bits

• 5 bits

• 6 bits

The standard QWERTY keyboard has 47 keys that can place characters on the screen. Each of these keys can also display a second character by holding the 'Shift' key at the same time. How many bits would you need to encode everything that could be typed on this keyboard?

• 5 bits

• 7 bits

• 3 bits

• 6 bits

• 4 bits

ASCII has an encoding for every character of the alphabet as well as encodings for numbers--that is, encodings for the symbols of the digits 0-9. So here is a trick question: How many bits are required to store the text of the number '150' in ASCII?

• 3 bits

• 8 bits

• 16 bits

• 24 bits

• 32 bits

How many unique IP addresses could be made in a fixed length IP address system using 6 bits?

• 6 users

• 12 users

• 32 users

• 64 users

ThesalespersoninacellphonestoreistellingmethatthephoneI'mconsideringhas8GBofmemory,whichmeansIcansave10,000photostakenwiththephone'scamera! Isthesalespersontellingmethetruth?Whyorwhynot?

How many bits are required to store the text of the number '255' in ASCII?

• 8 bits

• 16 bits

• 24 bits

• 32 bits

How many unique IP addresses could be made in a fixed length IP address system using 8 bits?

• 8 users

• 16 users

• 64 users

• 256 users

You have a coordinate grid that is 100x100. Assuming that you encode the x and y coordinate as separate numbers, what is the minimum number of bits that you will need to encode a coordinate in that space?

• 14

• 16

• 18

• 20

How many bits are required to store the text of the number '1000' in ASCII?

• 8 bits

• 16 bits

• 32 bits

• 24 bits