Chapter 1: Digital Systems and Information Flashcards
How much Volt does an outlet usually use?
110V
How much Volt does a computer usually use?
Up to 1.1V
How much Volt does an iPhone usually use?
Up to 0.8V
How many bits can a modern computer usually process at one time?
64 bit
What does the CPU on a basic level when an user clicks on an image to show it on a device?
The CPU converts the digital info to analog and the device displays the analog image
What is 11010 in decimal?
26
Why is photo editing so taxing on a computer’s CPU?
Because the CPU is making lots of calculations because as the user changes the image, he/she changes the digital information of many pixels
What is 110101.11 in decimal?
53.75
What is an analog signal?
A signal that is continuous as opposed to having only discrete values
What is a digital signal?
A signal that is not continuous across a range of values but that rather has only discrete values that it can take on
What is a bit?
A binary digit (0 or 1)
How do you convert a binary number to a decimal number?
By expanding the number into a power series with a base of 2
In digital systems, we refer to 2 to the power of 10 as what?
K (kilo)
In digital systems, we refer to 2 to the power of 20 as what?
M (mega)
In digital systems, we refer to 2 to the power of 30 as what?
G (giga)
In digital systems, we refer to 2 to the power of 40 as what?
T (tera)
Conventionally people use a kilobit to represent 1000 bits but in reality it is how many bits?
It is actually 2 to the power of 10, which is 1,024 bits
How do you convert a decimal number to a binary number?
By successively dividing by 2 and noting down the remainders. Then, you read the remainders from bottom to top to get the binary number.
The octal number system has which digits?
The digits 0 through 7
How do you convert an octal number to a decimal number?
By expanding the number into a power series with a base of 8