#Loop questions in c drivers
#Loop questions in c code
#Loop questions in c free

If the variable is defined in 'file2.c' and you want to access it in 'file1.c', then you have to create a header file like 'file2.h'.Дeclare the variable using extern in the header file and then include it file in 'file1.c' or wherever you want to access the variable.Д¦)How will you protect a character pointer by some accidentally modification with the pointer address?Д¬onstant character pointer ( const char*) prevents the unnecessary modifications with the pointer address in the string.Д®xample: ///declaration const char *str //we can reassign the pointer //string will be declared somewhere in the memory and //its address will be assigned to the 'str'

#Loop questions in c code

Volatile variables are used with those variables which are used to communicate with the computer hardware, signals, handlers etc.Д¬onsider the given code below: //global declaration unsigned char isDeviceAttached = 0 //other code segment int main ( ) ДЇile2.c /*define variable in global scope*/ unsigned char flgUSB = 0 /*while defining a variable, you can assign a default value to it*/ДЇile2.h /*declare variable in global scope*/ extern unsigned char flgUSB /*do not use default value here, it will generate an error*/ Therefore, a volatile is used to prevent the compiler for any type of optimization on the variable. When any variable is used frequently, the compiler optimizes it and keeps the variables in his memory (there are some specific memory blocks (registers), from there variable is accessibility is fast) to serve its value faster to the program. Volatile is used to prevent the compiler to optimize any variable. Therefore, we must be careful while using the pointer and limit boundaries.Д¤) Why do we use вЂvolatileвЂ™ keyboard in C? When this error occurs program terminates and does not execute further instructions. We can also say that if a pointer exceeds the stack limitations (boundaries). This error may occur if the program tries to access the memory beyond its available maximum limit.

Segmentation fault is the reason to generate stack overflow error in C.

#Loop questions in c free

It may also occur when you try to free a memory (using a pointer), which is already freed.

In that case, the program may return segmentation fault error.

If you are trying to access a memory area which is read-only.

a pointer which may not have a valid address/memory location to point).

Usages of the dereferenced pointer (i.e.

There are some of the cases (causes), when segmentation fault error may occur, Segmentation fault is a runtime error, which may occur due to some causes (listed below) when the program is running properly. Most of the low-level applications which interact with the hardware are written in C programming language, it is also used to develop complete operating systems to electronic devices вЂ“ which are generally known as firmwareвЂ™sДў) What are some common causes for the segmentation fault error in C?

#Loop questions in c drivers

While, Embedded C is used to develop micro-controller based applications such as device drivers (memory device driver, camera device driver, WIFI device drive etc.) C programming language is used to develop desktop based applications. Top Interview Questions and Answers in Embedded CД®mbedded C is an extension of C programming language.

Submitted by IncludeHelp, on May 24, 2018 Embedded C programming Interview Questions and Answers: This page contains some of the top Interview questions and Answers of Embedded C programming language.