2017年上半年软件设计师考试上午真题（参考答案）

1: 以下路由策略中，依据网络信息经常更新路由的是（）。

A.静态路由
B.洪泛式
C.随机路由
D.自适应路由

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2: The beauty of software is in its function，in its internal structure，and in the way in which it is created by a team. To a user，a program with just the right features presented through an intuitive and（）interface is beautiful.To a software designer，an internal structure that is partitioned in a simple and intuitive manner，and that minimizes internal coupling is beautiful.To developers and managers ，a motivated team of developers making significant progress every week，and producing defect-free code，is beautiful.There is beauty on all these levels.
our world needs software--lots of software. Fifty years ago software was something that ran in a few big and expensive machines. Thirty years ago it was something that ran in most companies and industrial settings. Now there is software running in our cell phones，watches，appliances，automobiles，toys，and tools. And need for new and better software never（）.As our civilization grows and expands，as developing nations build their infrastructures，as developed nations strive to achieve ever greater efficiencies，the need for more and more Software（）to increase. It would be a great shame if，in all that software，there was no beauty.
We know that software can be ugly. We know that it can be hard to use，unreliable ，and carelessly structured. We know that there are software systems whose tangled and careless internal structures make them expensive and difficult to change. We know that there are software systems that present their features through an awkward and cumbersome interface. We know that there are software systems that crash and misbehave. These are（）systems. Unfortunately，as a profession，software developers tend to create more ugly systems than beautiful ones.
There is a secret that the best software developers know. Beauty is cheaper than ugliness. Beauty is faster than ugliness. A beautiful software system can be built and maintained in less time，and for less money ,than an ugly one. Novice software developers don't. understand this. They think that they have to do everything fast and quick. They think that beauty is（） .No! By doing things fast and quick，they make messes that make the software stiff，and hard to understand，Beautiful systems e flexible and easy to understand. Building them and maintaining them is a joy. It is ugliness that is impractical.Ugliness will slow you down and make your software expensive and brittle. Beautiful systems cost the least build and maintain，and are delivered soonest.

A. Simple
B. Hard
C. Complex
D. duplicated
A.happens
B.exists
C.stops
D.starts
A. starts
B.continues

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3: 在异步通信中，每个字符包含 1 位起始位、7位数据位和2位终止位，若每秒钟传送500个字符，则有效数据速率为（）。

A.500b/s
B.700b/s
C.3500b/s
D.5000b/s

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4: 下面关于Linux目录的描述中，正确的是（）。

A.Linux只有一个根目录，用 " /root "表示
B. Linux中有多个根目录，用"/"加相应目录名称表示
C. Linux中只有一个根目录，用"/"表示
D. Linux 中有多个根目录，用相应目录名称表示

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5: 以下关于TCP/IP 协议栈中协议和层次的对应关系正确的是（）。

A.<img alt="" src="//img1.yqda.net/question-name/4c/6f873423931feff68dc3b3967f1dbc.png" />
B.<img alt="" src="//img1.yqda.net/question-name/4c/6f873423931feff68dc3b3967f1dbc.png" />
C.<img alt="" src="//img1.yqda.net/question-name/12/c354f9418f776f78ba464b64f03729.png" />
D.<img alt="" src="//img1.yqda.net/question-name/59/bd1adbbf8563ae3e061a23c60fe4e4.png" />

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