收集的一些嵌入式软件开发工程师面试题

收集的一些嵌入式软件开发工程师面试题

1.什么是平衡二叉树编写一个删除平衡二叉树的程序

2.写一个程序，求有向有权图两点之间的最小权

3.根据你的理解，写出Cstring类的构造函数和析构函数

4.使用C语言实现对ini文件的访问，使程序可以对int，double，字符串类进行读写。

5.n×n个方格（n为任意整数），定义若两个格有公共边则称两个格相邻。现将个格中的N个格子图黑，使每个格子都与黑格子相邻。试编程，使N最小。

1.static变量和static 函数各有什么特点

3.描述一下嵌入式基于ROM的运行方式基于ram的运行方式有什么区别。

4.task 有几种状态

5.task 有几种通讯方式

6.C函数允许重入吗

7.嵌入式操作系统和通用操作系统有什么差别

一面，技术面

（1）VxWorks、uc/OS、Palm嵌入式系统操作系统的区别

（2）做嵌入式软件开发和普通桌面软件开发有什么区别

（3）c语言问题，union和struct 的区别

（4）sizeof(一大堆变量)，如果用这个函数分配内存的大小一定与定义相同吗

（5）解释什么是优先级反转。

Can structures be passed to the functions by value

Why cannot arrays be passed by values to functions

Advantages and disadvantages of using macro and inline functions

What happens when recursion functions are declared inline

Scope of static variables

Difference between object oriented and object based languages

Multiple inheritance objects contain howmany multiply inherited ancestor

What are the 4 different types of inheritance relationship How would you find out the no of instance of a class

Is java a pure object oriented language Why

Order of constructor and destructor call in case of multiple inheritance

Can u have inline virtual functions in a class

When you inherit a class using private keyword which members of base class are visible to the derived class

What is the output of printf( nab bcd ref ); -> ef

#define cat(x,y) x##y concatenates x to y. But cat(cat(1,2),3) does not expand but gives preprocessor warning. Why Can you have constant volatile variable Yes, you can have a volatile pointer

++*ip increments what it increments what ip points to

Operations involving unsigned and signed –unsigned will be converted to signed

a+++b -> (a++)+b

malloc(sizeof(0)) will return –valid pointer

main() fork();fork();fork();printf( hello world ); –will print 8 times.

Array of pts to functions –void (*fptr[10])()

Which way of writing infinite loops is more efficient than others there are 3ways.

# error –what it does

How is function itoa() written

Who to know wether systemuses big endian or little endian format and how to convert among them

What is interrupt latency

What is forward reference w.r.t. pointers in c

How is generic list manipulation function written which

accepts elements of any kind

What is the difference between hard real-time and soft real-time OS

What is interrupt latency How can you recuce it

What is the differnce between embedded systems and the system in which rtos is running

How can you define a structure with bit field members

What are the features different in pSOS and vxWorks

How do you write a function which takes 2 arguments a byte and a field in the byte and returns the value of the field in that byte

What are the different storage classes in C

What are the different qualifiers in C

What are the different BSD and SVR4 communication mechanisms

一位资深的嵌入式项目经理曾这样对我说:搞嵌入式要往下走，要搞底层要搞算法，因为它们比较有前途。

Embedded firmware interview questions

１．Write function in C that gets array of chars, and search for the longest sequence of repeatedly 1 bits. It returns the the first bit place in the sequence and the number of 1 bits in the sequence. (a) loop of 2