Chapter 1 : Binary systems and hexadecimal Flashcards
What is the use of binary numbers in computer systems?
They are required as the switches in a computer system can only be either on or off, 1 or 0. This can also be used to check if something has happened (yes or no)
What does each bit represent in a byte (in denary)
128,64,32,16,8,4,2,1
How many bits are in a byte?
8
What does KB stand for?
Kilobyte
How many bytes are in a KB?
2^10
What does MB stand for?
Megabyte
How many bytes are in a MB?
2^20
What does GB stand for?
Gigabyte
How many bytes are in a GB?
2^30
What does TB stand for?
Terabyte
How many bytes are in a TB?
2^40
What does PB stand for?
Petabyte
How many bytes are in a PB?
2^50
What base is hexadecimal?
16
What are the numbers in the hexadecimal number line?
0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F
How do you convert binary to hexadecimal?
separate the binary digits from the end of the string into groups of 4 and then use each set of binary digits to make a hexadecimal
How do you convert hexadecimal to denary?
multiply the digits by 16 to the power of there position -1 and add them together
What is a memory dump?
It is where the contents of part of a computers memory are outputted to a printer or monitor
How is hexadecimal used in HTML?
It is used to represent colours
Why is hexadecimal used in MAC addresses?
It is easier to read
How is hexadecimal used in web addresses?
It is used as a security feature as it is takes longer to type
Why is hexadecimal used in assembly code and machine code?
It is faster to type than binary and it is easier to troubleshoot
What does MAC stand for?
Media Access Control
What are the two types of MAC address?
Universally Administered (UAA) and Locally Administered (LAA)
