Answer / daniboy

A volatile variable is one whose VALUE CAN CHANGE
UNEXPECTEDLY. Consequently, the compiler can make NO
ASSUMPTIONS about the value of the variable. In
particular, the optimizer must be careful to RELOAD the
variable every time it is used instead of holding a copy in
a register.
Examples of volatile variables are:

(a) Hardware registers in peripherals (e.g., status
registers)
(b) Non-stack variables referenced within an interrupt
service routine.
(c) Variables shared by multiple tasks in a multi-
threaded application.

Source: 10 Best Questions to would-be Embedded Programmers -
By Nigel Johns

write a c program to find biggest of 3 number without relational operator?

12 Answers   TCS, Wipro,

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Explain how can you avoid including a header more than once?

0 Answers  

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Is array a primitive data type in c?

0 Answers  

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Given a piece of code int x[10]; int *ab; ab=x; To access the 6th element of the array which of the following is incorrect? (A) *(x+5) (B) x[5] (C) ab[5] (D) *(*ab+5} .

2 Answers   Oracle,

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What does void main return?

0 Answers  

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which is the best site or book for learning C...and i need the content for C..how to get the good programming skills....? can plz suggest me....

2 Answers  

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What does #pragma once mean?

0 Answers   Celstream,

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#include main() { int *p, *c, i; i = 5; p = (int*) (malloc(sizeof(i))); printf(" %d",*p); *p = 10; printf(" %d %d",i,*p); c = (int*) calloc(2); printf(" %d ",*c); }

0 Answers   Wilco,

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Give a method to count the number of ones in a 32 bit number?

4 Answers  

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write a c program to remove all the duplicate characters in a string and replace with single character? ex:-input- AAABBBCCC output- ABC

2 Answers   HCL,

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What is data types?

0 Answers  

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hOW Can I add character in to pointer array of characters char *a="indian"; ie I want to add google after indian in the char *a

1 Answers  

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