本文提出了一系列编程挑战问题，旨在检验读者对于C语言和嵌入式系统的理解水平。涵盖主题包括静态关键字的作用、ISA与HASA的关系、C++中的接口实现方式以及如何提高函数的可重入性等。
好好地考察一下你的Embedded English & C language理解力吧.
1.What is achieved by prefixing the 'static' keyword to a file-level function or file-level variable declaration?
2.Describe the difference between the “IS A” and “HAS A” object relationships. Which is the stronger relationship and why?
3.Java & C# support interfaces directly with the “interface” keyword.
C++ does not have an “interface” keyword. How do you create an interface in C++?
Where/when is the use of interfaces especially helpful?
C++ does not have an “interface” keyword. How do you create an interface in C++?
Where/when is the use of interfaces especially helpful?
4.If a program requires a large number of execution contexts what can be done to minimise thread scheduling overhead?
5. What does it mean to say that a function is reentrant?
What are some of the ways of achieving re-entrancy?
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