英语自我介绍
- Good morning,dear professors.
- It is really my privilege to be here and delighted to obtain this opportunity to attend this interview.My name is xxx and I am from taizhou，jiangsu province.I will graduate from xxx,majoring in computer science and technology.And now ,I am trying my best to obtain a key to your University.
- In my spare time,I enjoy reading primarily because it can cultivate my critical thinking,diversify my knowledge and enrich my mind.Other than that.I am fond of music mainly because it can cheer me up greatly when I feel down.
- I am a person who is very serious about work,so I always try my best to accomplish my work. I’m a diligent student .In the past years,I have learned a lot of professional knowledge and practical skills. I’m kind-hearted and ready to help others especially when they are in trouble.Owing to my kindness I made a lot of friends in college.Besides,I’m a person of great perseverance.During these days preparing for postgraduate examination I keep running everyday.Thanks to this.I could more concentrate on my study.
- If I am lucky enough to be accepted,I would spare no effort to research on my major,build up systematic view of knowledge and achieve self value.
- OK.That’s all,Thanks for your attention.
英语Q&A
你的大学
- I really love my university.The perfect patience of my teachers comfort my study anxiety,the diligence of my roommates motivated me to devote more energy into study.My university is not in the leading position in academic field,but it has taught me how to be an academic person.
你的家乡
- I’m from Taizhou,a beautiful city in jiangsu. This is the hometown of Zheng Banqiao and Mei Lanfang, which has a long cultural history.
你的家庭
- My family is warm and harmonious,my parents are both kind and hard-working.They teach me how to tell right from wrong and how to be independent and persistent.During my preparation for this interview,my parents’ support has always been the source of my power.
爱好
- I enjoy reading primarily because it can cultivate my critical thinking,diversify my knowledge and enrich my mind.Other than that.I am fond of music mainly because it can cheer me up greatly when I feel down.
规划
- First,I will spare no effort to pursue the knowledge of my major and master the research methods in this field.Besides,I will be engaged in practical work related to my major so that I can put theoretical knowledge into practice.
考研
- I took the postgraduate entrance exam because I have a strong desire to further explore professional knowledge. In addition, I really want to make up for the time I lost in the past. Therefore, I think that further study is an urgent need for me to realize my self-worth.
专业课
计算机网络
- TCP三次握手
round1:客户端发送连接请求报文段、SYN=1、seq=x(随机）
round2:服务端返回确认请求报文段并为TCP连接分配内存和变量、SYN=1、ACK=1、seq=y(随机）、ack==x+1
round3:客户端返回确认的确认并为TCP连接分配内存和变量,可以携带数据、SYN=0、ACK=1、seq=x+1、ack=y+1
洪范攻击：客户端发送SYN，服务端返回ACK,客户端不对ACK进行确认，客户端就一直发送ACK，此时TCP连接处于挂机状态，解决办法就是设置SYN cookie - TCP四次握手
round1:客户端发送连接释放报文端
round2:服务端返回确认报文段，半关闭状态
round3:服务器发送数据结束后，发送连接释放报文段
round4:客户端返回确认报文段 - TCP可靠传输
校验、序号、确认、重传 - TCP流量控制
滑动窗口机制 - TCP拥塞控制
满开始和拥塞避免
快重传、快恢复
- ARP
- 作用：ip地址到mac地址的映射，解决下一跳走哪的问题
- 补充：发送数据过程：应用层发送报文、传输层对报文分段形成报文段、网络层对报文段加ip地址形成ip数据报或分组、数据链路层对ip数据报加mac地址封装成帧、物理层以数字信号或模拟信号在信道透明传输。
- ARP协议使用过程：检查ARP高速缓存，如果有就将mac地址写入，没有就广播ARP请求分组，目的主机收到后会单播一个ARP响应分组、源主机收到后将目的主机映射的mac地址写入ARP高速缓存
- RIP
RIP(Routing Information Protocol,路由信息协议）是一种内部网关协议（IGP），是一种动态路由选择协议，用于自治系统（AS）内的路由信息的传递。RIP协议基于距离矢量算法（DistanceVectorAlgorithms），使用“跳数”(即metric)来衡量到达目标地址的路由距离。这种协议的路由器只关心自己周围的世界，只与自己相邻的路由器交换信息，范围限制在15跳(15度)之内，再远，它就不关心了。RIP应用于OSI网络七层模型的应用层。
适用于小网络、路由最多经过15个路由器、只和相邻路由表交换信息、基于距离矢量算法
收敛：经过若干次路由表信息交换，每个路由器都知道到在本AS中其他路由器的最短距离和下一跳地址
数据库DB
-
候选码、主码、主属性
候选码：唯一表示一个元组的最小属性集合
主码：候选码中选一个
主属性：候选码中任意属性
全码：若关系模式只有一个候选码，且该候选码是该关系模式所有属性组成，则该候选码为全码 -
范式
1NF:属性不可再分
2NF:消除了非主属性对码的部分函数依赖
3NF:消除了非主属性对码的传递函数依赖
BCNF:消除了主属性对码的部分和传递依赖 -
模糊查找
LIKE
% 零或多个字符
— 一个字符
毕业设计
题目：基于SSM的商品信息管理系统
选题原因：在我国近二十年的发展中，商业的发展可谓千变万化，尤其是近年来，商业经营方式已由单一向多种经营态势发展，各种商业经营形式充斥其中。其中商业超市已成为商业大家庭的主力军。商业超市是劳动密集型的服务行业，不同于生产型的企业，所有的商品都是源自外购，而且采购的品种多，采购的批次频繁。超级市场具有经营品种丰富、更新速度快、高峰时间顾客交易频繁、速度快准确性要求高的特点，给超市商品销售和管理带来了新的压力，各个超市商家都在寻找突破口来改善经营管理难的现状。互联网信息时代的到来，给超市的商品进销存管理带来的新的发展契机，将先进网络信息化技术引进到超市的日常超市进销存管理工作中来显得非常有必要，本课题就是根据当前实体超市运营的实际需要而着手开发设计的超市管理系统。
主要内容：基于SSM的商品信息管理系统，以JAVA为开发语言，架构采用可伸缩性、灵活性、易维护性的J2EE架构。前端采用JSP技术，后台服务架构采用轻量级的SSM框架。数据库选用轻巧便捷的MYSQL数据库。WEB服务器选为开源且相对稳定的Tomcat，idea是系统开发的IDE工具。该项目通过对超市商品信息管理的开发，实现用户的登录与注册操作的功能，及对用户的登录进行身份验证，验证通过后进入到管理员操作界面进行商品的进销存等业务的操作，通过后台对业务数据进行逻辑处理，实时添加到了数据库中，然后由其他不用角色用户登录对业务数据进行不同的操作，从而实现对超市商品信息的动态查看及业务流程办理。