• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Computer Science: Post your doubts here!

M

musiclover gurl

Messages
69
Reaction score
48
Points
28
Ok so the first question, Why is it that a byte can hold 256 charaters but stores 255 values? It may be simple but I can't seem to find the logic!
Help please?
 
H

hafsa saleem

Messages
66
Reaction score
57
Points
28
A byte (8 bits) can store 256 unique combinations of binary digits which means it can store 256 different characters.the minimum value a byte can have is 0
(where each of the 8 bits has a value of zero)whereas the maximum value a byte can have is 255(Add 1,2,4,8,16,32,64,128)where each of the 8 bits has a value of 1.now start counting from 0 all the way to 255 to have the maximum no of characters that can be stored using one byte
hope u get it now!
 
M

musiclover gurl

Messages
69
Reaction score
48
Points
28
hafsa saleem said:
A byte (8 bits) can store 256 unique combinations of binary digits which means it can store 256 different characters.the minimum value a byte can have is 0
(where each of the 8 bits has a value of zero)whereas the maximum value a byte can have is 255(Add 1,2,4,8,16,32,64,128)where each of the 8 bits has a value of 1.now start counting from 0 all the way to 255 to have the maximum no of characters that can be stored using one byte
hope u get it now!
Click to expand...
Thank you hafsa saleem ! Got it now :D :)
https://www.xtremepapers.com/community/members/hafsa-saleem.56714/
 
M

musiclover gurl

Messages
69
Reaction score
48
Points
28
Can anyone tell me what are the smallest/largest magnitude, largest positive and smallest positive number that can be stored in an 8 bit register? And are there more than this that I should know?
Help please?
 
Y

Youknowwhoo

Messages
107
Reaction score
83
Points
38
Guys those who giving CS private , r we supposed to submit any projects in AS like computing for CS ?
 
Wâlèé Atèéq

Wâlèé Atèéq

Messages
316
Reaction score
399
Points
73
New at C.S. plus hadn't done IGCSE w/ C.S. So having a bit problem in Algo...!! Need a help..! Way better if I Get some notes for that..! seeking for Help..! :'( *(*Lachar*)*
 
C

CuteFarah

Messages
6
Reaction score
2
Points
3
Hello guys can you help me in tasks 3.4,3.5,3.6. PLease and thanks you. May god bless you guys and help everyone succeed in their exams.
 

Attachments

  • 15paper.rtf
    4.8 MB · Views: 9
N

nimade

Messages
3
Reaction score
1
Points
3
Hi can anyone please upload the A level Paper 4 pre-release material for 2016
My school is not cooperating with me and I am at a loss :'(
please help me :'(
 
You must log in or register to reply here.
Top