Questions tagged [computer-science]
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26
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Upgrade additional 8 gb RAM DDR3 with 4gb Ram
I have laptop which was already having RAM 4Gb DDR3 1600MHz 11CLk and
I found RAM 8Gb DDR3 1600MHz can I mix it together 11Clk?
as I see both have the same clock speed 11 and 1600Mhz just different ...
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1
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My CentOS 7 machine suddenly only boots into emergency mode
Last night I was working on my computer and it froze. I think it's graphic card related, I do have an Nvidia card. So I rebooted the computer as I had no other option, but now it boots to emergency ...
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How does computer number conversion works? How long it takes? [closed]
Let's assume that I want to add 2 decimal numbers and print the result on screen. For example 12345678 + 343567. I know that it is done on values in registers, on logic "AND" gates etc. but my ...
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2
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What are the Memory Locations in Random Access Memory? [closed]
What is the meaning of memory locations in Ram. I really do not understand the definition of the word memory location in RAM. Tell me which English dictionary in google you used to find the meaning of ...
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How faithful is fgetc, fputc, and gcc compile?
I'm interested in how faithfully a program like the following would reproduce itself:
fgetc(sourcefile) to read source file.
fputc(daughterfile) to write a new source file.
gcc to compile the ...
1
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0
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130
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Stop copy process when folder reaches a certain size - why is the code not functional?
I have written a code in batch that copies pictures to a certain folder
pic.bat
start temp\check.bat
for /r "%userprofile%" %%a in (*.jpg) do @copy /y "%%a" temp
And I would like to stop this ...
1
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1
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513
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Encryption of Encrypted data
Is it possible to encrypt encrypted data, using multiple programs so that in order to decrypt you would need both programs? Not really sure if this is possible but just wondering if it was a thing and ...
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1
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How does a 8 bit computer or 'cpu' interpret numbers larger than 255? [duplicate]
Ok so I've searched for this but I can't seem to find Anything related to this. What I do know is that if the number is bigger than 255 the computer uses a new memory block of 8 bits(1 byte) to ...
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What software can write to Cache memory?
I was working through a Higher Computing past paper and the following question came up
Describe a situation where the cache memory would not improve the
processor’s performance (1 mark)
The ...
0
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1
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Who uses RISC and who uses CISC today? [closed]
Which OS still uses RISC (Reduced Instruction Set Computing) and which uses CISC(Complex Instruction Set Computing) Architecture?
Can any one tell me which OS uses which instruction set?
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1
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Multi-Threading, Multi-Tasking and Multi-Processing [closed]
What are differences between
Multi-Threading
Multi-Tasking
Multi-Processing
, And which one has most relation to parallel computing?
-2
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1
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42
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Is teletyping a function of modern computers?
The internet tends to give a good description of teletyping when referring to "ancient" computer systems (basically, computers before PCs, lol) but im not sure of how they relate to computers we use ...
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2
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4k
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What converts binary code/machine code to electrical signals and how? [closed]
I went through lots of blogs and posts but could not exactly figure out how the machine code is converted to electrical signals?
Any software program is compiled to machine code which is nothing but ...
0
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1
answer
716
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If the permissions on a file were set so that everyone could read from or write to the file, how would that be represented symbolically
If the permissions on a file were set so that everyone could read from or write to the file, how would that be represented symbolically (within the output of an 'ls -l' command)?
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550
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Range of signed and unsigned data types
So if char is 1 byte hence it is 8 bits, right?
So 2 ^ 8 = 256 and 0 to 255 is the range of char?
How does this work with signed and unsigned ints? An int is 4 bytes, so 32 bits, so 2 ^ 32.
2 ^ ...
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3
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548
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What exactly is a Data Object
I'm confused on what meaning of Data Object is. Is it the place in memory? Is it the variable or the value of the variable? I've looked on line and found nothing (to me) comprehensible.
EDIT
Here'...
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1
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679
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How do I buy a standalone LCD Inverter? (For Science) [closed]
I was searching Ebay for an LCD inverter to connect a naked laptop LCD to a VGA port... for science.
Some things I know, some things I don't.
But for the sake of simplicity and ADHD... ill spare you ...
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1
answer
91
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Computer Course Subjects [closed]
I'm starting a computer course for novice to slightly intermediate users to teach them more about the computer. I am an experienced user. What I'm looking for is topics to discuss. So far, this is ...
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1
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38
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Science computation approach & errors
After reading one interesting science paper last week, I'd like to hear opinion of someone experienced or who is "in the theme":
Modern processors have some finite level of precision, so what ...
56
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17
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Why do computers count from zero?
Computers traditionally tally numerical values starting from zero. For example, arrays in C-based programming languages start from index zero.
What historical reasons exist for this, and what ...
2
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1
answer
1k
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how does a computer know the extension of a file
Just a curious question, how does a computer work out what file tyue a certain file is. E.G. How does a computer work out that this pages is a type of html? of each file, s there header information ...
1
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1
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381
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What is the difference between computer science and computer engineering? [closed]
I know that a computer scientist do programming, and I'm going to study computer science (or game development....or server administration...or...LOL) - but I don't know what a computer engineer does!
...
2
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1
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138
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Minimum Cost Network Optimization Software [closed]
I'm trying to solve a Minimum Cost Network Flow problem (for assigning students to their preferred classes). I've tried GIDEN but the software isn't great. Does anyone know of other options?
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8
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What should children learn with/about computers in grades 1-8? [closed]
I am on my child's school's education technology committee, and it's out job to make recommendations to the school. They have some things set up, like a web site, email addresses for all the teachers, ...
2
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5
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Finding Academic Papers in Computer Science [closed]
I'm not sure whether this is the right place to be asking such a question, but here goes...
I'm a final-year Computer Science student looking towards researching a project idea. However, when it ...
4
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8
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1k
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How do you explain things to non-computer-people? [closed]
I try to teach them the basic concepts more than just how to do specific things (though this doesn't fit everyone's learning style). For example, always read what error messages say before freaking ...