Answer Posted / anonimos

volatile variables are used on RT Embedded systems to
interface a physical memory mapped/IO mapped cell on the
computer board (volatile pointer).

Example define IO port:
#define PortA (*(volatile unsigned char *)0x3b)
unsigned char inputValue=PortA;

optimization may attempt to perform paging to hard drive of
to cache or even CPU registers so when reading from the
physical location in Mem/IO space the program will actually
read old value that was paged/cached by optimization
algorithm of the computer/board, even after the Input
changed on this Memory/IO cell.

volatile instruct the compiler to prevent optimization by
caching to registers/cache.

How can I open files mentioned on the command line, and parse option flags?

683

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Write a program to print ASCII code for a given digit.

774

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c language supports bitwise operations, why a) 'c' language is system oriented b) 'c' language is problem oriented c) 'c' language is middle level language d) all the above

703

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while loop contains parts a) initialisation, evalution of an expression,increment /decrement b) initialisation, increment/decrement c) condition evalution d) none of the above

851

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Do you know what are bitwise shift operators in c programming?

694

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1623

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Does c have circular shift operators?

833

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693

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What is the condition that is applied with ?: Operator?

747

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What is the main difference between calloc () and malloc ()?

687

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720

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690

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Explain what are compound statements?

702

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What does char * * argv mean in c?

713

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.find the output of the following program? char*myfunc(char*ptr) { ptr +=3; return (ptr); } int main() { char*x,*y; x="HELLO"; y=myfunc(x); printf("y = %s ",y); return 0; }

2140

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