Robotics I Fall Semester Test

When you make an error:

• Scratch it out completely
• Erase it
• Draw a line through it
• X it out

Why is digital data in computers represented by binary?

• The binary number system is the only system flexible enough to allow for representing data other than numbers.
• It's easier, cheaper, and more reliable to build machines and devices that only have to distinguish between binary states.
• It typically takes fewer digits to represent a number in binary when compared to other number systems (for example, the decimal number system)
• It's impossible to build a computing machine that uses anything but binary to represent numbers

Convert the binary (base-2) number 1001 to decimal (base-10).

• A. 9
• B. 10
• C. 16
• D. 17

Convert the decimal (base-10) number 20 to binary (base-2).

• A. 10010
• B. 00101
• C. 11000
• D. 10100

What are the only two numbers you can use in binary?

• 0 and 1
• 1 and 2
• 1, 2, 3, 4
• 2, 4, 6, 8

A bit is

• a numerical label assigned to each device.
• a keyboarding term for typing.
• is a numeral system made up of 16 symbols.
• the smallest unit of data in a computer.

8 bytes = 1 bit

• True
• False

Convert 65 to binary

• 01100001
• 00100001
• 01000001
• 00100101

Convert 00100100 to decimal

• 26
• 46
• 36
• 56

What is the 4-bit binary number for the decimal number Ten (10)?

• 0010
• 1010
• 0110
• 0101