File Name: programming embedded systems in c and c++ interview.zip
There are actually two ways you can do this. Likewise, the statement "x --" means to decrement the value of x by 1. When using Call by Value, you are sending the value of a variable as parameter to a function, whereas Call by Reference sends the address of the variable. Also, under Call by Value, the value in the parameter is not affected by whatever operation that takes place, while in the case of Call by Reference, values can be affected by the process within the function. How does this aid in debugging?
Searching for a new job know a day has become very difficult for everyone. So, in such circumstances it is very difficult for participants. To clear all such confusion and doubts regarding interview job positions and interview question and answers Wisdomjobs have clearly stated everything on the site page. Question 1. Answer : The C's volatile keyword is a qualifier that tells the compiler not to optimize when applied to a variable. By declaring a variable volatile, we can tell the compiler that the value of the variable may change any moment from outside of the scope of the program. A variable should be declared volatile whenever its value could change unexpectedly and beyond the comprehension of the compiler.
You are looking for embedded c interview questions or tricky embedded c interview questions, then you are at the right place. So here I have tried to create some collection of embedded c interview questions that might ask by your interviewer. These embedded C interview questions, I have created after spent many hours. I have also given some unsolved embedded system questions for you at the last of the article. I hope these embedded C interview questions will be helpful. The volatile keyword is a type qualifier that prevents the objects from the compiler optimization. According to C standard, an object that has volatile-qualified type may be modified in ways unknown to the implementation or have other unknown side effects.
Home page Contact Us. Net DWH New. Where in that some additional feature has added like access specifire which give access to the variable in class and also outside of the class. And with it added some extra feature like data hiding, abstraction and encapuslation and some more like that. It is plus plus features of C Programming Language.
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Therefore, when a variable is declared, the program knows the data type of that variable. In case of function declaration, the program knows what are the arguments to that functions, their data types, the order of arguments and the return type of the function.
The C's volatile keyword is a qualifier that tells the compiler not to optimize when applied to a variable. By declaring a variable volatile, we can tell the compiler that the value of the variable may change any moment from outside of the scope of the program. A variable should be declared volatile whenever its value could change unexpectedly and beyond the comprehension of the compiler. In those cases it is required not to optimize the code, doing so may lead to erroneous result and load the variable every time it is used in the program. Volatile keyword is useful for memory-mapped peripheral registers, global variables modified by an interrupt service routine, global variables accessed by multiple tasks within a multi-threaded application.
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