Post-Review Binary

What is the decimal value of 0101?

What is the decimal value of 1101 ?

What is the decimal value of 1101 ?

• 13

• 12

• 1.101

• 1101

Binary is made up of a seemingly endless sequence of these.

• 1's and 0's

• A's and B's

• Numbers

• Letters and Numbers

The American counting system we learn in school is based on a(n) _ system.

• base two

• hexidecimal

• base ten

• bits

Which number system is used to store information digitally in a computer?

• Decimal

• Binary

• Octal

• Hexadecimal

How many different digits are used in the Hexadecimal number system?

• 2

• 10

• 8

• 16

How many different values can be represented using 4 bits?

• 4 different values

• 8 different values

• 16 different values

• 32 different values

Suppose the ESPN website uses 8-bit unsigned integers to store how many points a team has scored in an NBA game.

For example:

0000 0010 represents 2 points

0000 1000 represents 8 points

What is the highest possible score the ESPN website could display?

• 256

• 255

• 11111111

• 128

A news website uses 32-bit integers to count the number of times an article has been viewed.

The website is becoming more popular, and expects some of the articles to exceed the number of views that can be represented with 32 bits. In anticipation of this, the website is planning to change to 64-bit integers for the view counter.

Which of the following best describes the result of using 64-bit integers instead of 32-bit integers?

• 2 times as many values can be represented

• 32 times as many values can be represented

• 2³² times as many values can be represented

• 32² times as many values can be represented