程序员面试题目

2024年3月29日发(作者：研学机构)

The Questions for Developing Applicants

Plea note: The questions with asterisk (*) can not be empty.

Describe general experience with:

1. LAN's, WAN.

2. Unix, Windows

3. Programming Languages.

4.

Device Driver

General questions:

1. Describe an experience you feel proud of in programming, such as creatively resolving a programming

(coding, algorithms, structure or others)problem you encountered in the past.

2. What's your biggest project? What a role did you played in it?

3. What's difference between dealing with an English string and a Chine String?

4. Do you know about GB code, Big5 code, Unicode? Would you plea give me your understanding of

their relationship and difference?

5. Now I have an English application and its source code, such as a word processor. What would you do

to make it work correctly in Chine environment?

Jiuzhouanhua Confidential 1

The Questions for Developing Applicants

6. If you're free to choo a job, what would you like to do: marketing, tester engineer, software

programmer, project manager, or other? And why? Will you accept a different assignment other than the

job you like, such as tester engineer position?

C QUESTIONS:

1.* Explain the difference between "call by value" and "call by reference" in a programming language.

How do the apply to the C language?

call by value ：

调用时子程序得到的是参数值的副本，子程序中对形参的改变其实只是影响了该副本的值，但

在返回主程序后该副本会被丢弃，因此在主程序中按值调用的参数仍保持原来的值。

call by reference ：

调用时子程序得到的是实际参数的内存地址，因此在子程序中改变形参的值时，实际会导致对

该形参所对应的地址处的内存数据的变化，即直接修改的是主程序中的变量的值，返回主程序

后该参数所对应的变量值会产生变化。

2.* Explain how C pointers work. What are they really? How can they be ud? What are the most

uful/vital ways to u them?

变量的地址称为变量的指针，即指针是一个内存单元的地址。

指针的基本形态有以下几种：

（1）int *p; //p为指向整型数据的指针变量

（2）int *p[n]; //定义指针数组p

（3）int *p(); //p为指针函数，返回一个指向整型数据的指针

（4）int (*p)(); //p为指向函数的指针，该函数返回一个整型值

（5）int (*p)[n] //p为指向含有n个元素的一维数组的指针变量

（6）int **p; //p为指向指针的指针，被指向的指针指向一个整型数据

（7）int(**p)[n] //p是一个指向另一个指针变量的指针变量，被指向的指针变量指向一个含

有n个整型数据的一维数组

（8）int *p()[n] //p为返回整型指针数组（首地址）的函数

（9）int (*p[])() //p为指向返回整型数值函数的指针数组

指针的使用：

（1）指针和数组

对于数组a[i]表示数组a的第i+1个变量，a是数组名，表示该数组的首地址。即a与

&a[0]等价，而p=a;通过p来访问数组元素。

（a）p,a,与&a[0]它们之间是等价的，都表示数组a的首地址

（b）int *p=a;*p=1;为所指向的存储单元赋值1

（c）int *p=a;表达式p+1为指向p的下一个存储单元

（d）表达式p+i为指向p后第i个元素。a[i],*(a+i),*(p+i)都表示数组a的第i个元素

（2）指针与函数参数的选择

如果用数组名作为函数参数，实参数组名代表数组首地址，而形参是用来接收从实参

传递过来的首地址，因此，形参应该是一个指针变量，因为只有指针变量才能存放地址。

（3）指针与链表

Jiuzhouanhua Confidential 2