Crash Course Computer Science #3 - Boolean Logic & Logic Gates

What does "binary" mean, literally?

• two states

• two parts

• two computers

• two numbers

In computers, the "on" and "off" states correlate to...

• if the computer is on or off

• if the internet is connected to WiFi

• if electricity is flowing or not

• if one computer is able to talk to another computer

One reason computers use binary is because it prevents confusion and crossed signals. Another reason is a branch of math already existed, called...

• Matrix Algebra

• Boolean Algebra

• Crustacean Algebra

• Linear Algebra

How is Boolean algebra different from what you learn in your high school algebra class? Pick 2 answers.

• the values of variables are true and false

• operations are logical

• the values of variables are numbers

• operations are addition and multiplication

Which of the these is NOT a fundamental operation in Boolean algebra?

• NOT

• AND

• OR

• YET

A logic table for NOT that has an input of TRUE will show an output for...

• TRUE

• FALSE

The AND Boolean operation takes two inputs but still has a single output. What must be the inputs be for the output to match?

• Both inputs must match to have the output also match

• Inputs don't need to match, but at least one of them must be turned to FALSE

• Inputs must both be FALSE

• Inputs must both be TRUE

For the OR operation....

• only one of the inputs needs to be TRUE for the output to be TRUE

• one input must be FALSE for the output to be FALSE

• both inputs must match for the output to be TRUE

An Exclusive OR, or XOR, is like a regular OR, but with one difference:

• if both inputs are true, the XOR is false

• if both inputs are false, the XOR is true

When computer engineers are designing processors, they _______ work at the transistor level.

• always

• never

• sometimes

• rarely