Basic Computer Info

• What is the base of the binary number system?

  Base 2
• How many digits are used in the binary system?

  Two digits: 0 and 1
• How is each character represented in the binary system?

  Each character is converted into a byte
• How many bits are there in a byte?

  Eight bits
• Who created the binary system?

  Alan Turing
• What is the purpose of the binary system in computing?

  It is used for the exchange of information
• What is the term for the software that manages hardware and user applications?

  Operating system
• What is a Petabyte in terms of Terabytes?

  A Petabyte is 1000 Terabytes
• Does binary carry over its numbers?

  Yes, binary does carry over its numbers
• What is a bit?

  1 or 0
• Describe the exchange of information with a user.

  User. <—> application. <—> Operating system. <—> hardware
• What is the ASCII table?

  Universal key for computer keyboard inputs
• How are cases determined for letters in the binary code? What does each figures mean

  Third bit determines the case ; 0 is uppercase, 1 is lowercase
• What does RGB stand for?

  Red, Green, Blue
• What is a pixel?

  A point on a screen that has red, green, and blue
• How much storage does a pixel need?

  3 bytes
• What does each byte represent using the RGB system?

  1st- red ; 2nd- green ; 3rd- blue
• How many points can you put into each byte in the RGB system?

  255
• What is numerical precision?

  Number of bits or digits used to represent a number.
• What are some errors that occur with numbers in programming?

  1. Invalid operation- square root of negative number
  2. Division by 0 - cannot divide by 0
  3. overflow
  4. underflow
  5. inexact - precision data error
• What is a rounding error?

  When (a+b) + c ≠ a + (b+c)
• Why should one look out for rounding errors?

  They can hinder your programs accuracy
• What is the base 16 system called?

  Hexadecimal Notation
• What symbols do we use after 9 in hexadecimal notation?

  A-F
• What base System do computers use for errors?

  Hexadecimal
• What can be used to determine the base 10 equivalent of a different base system number?

  Base ^ n power
• When converting binary to hexadecimal, what is unique?

  Every 4 bits equal one place for hexadecimal
• Where did bools come form?

  Boolean Algebra (Paper)
• Where can Algebra be used in the realm of computer?

  Logic
• What are the order of operations for Logic?

  Parentheses

  NOT

  AND

  OR
• How goes an AND gate work?

  Both sides true for the gate to return true
• How does an OR gate work?

  Returns true if either of sides are true
• How does a NOT gate work?

  Returns opposite Boolean value that was inserted
• How does an XOR gate work?

  Returns true only if one side is true
• When using a half adder, what did it return?

  A sum and carry bit
• What does a half adder do?

  Adds two bits together
• What does a XOR gate consist of going from left to right?

  2 NOTs , 2 ANDs, and 1 OR
• How is the sum digit created in a half adder?

  XOR gate
• How is the carry digit created in a half adder?

  AND gate
• What does a full adder do?

  Adds two or more bytes together