云南开放大学计算机专业英语(20秋)形考作业8-答案

1、云南开放大学-计算机专业英语（20秋）形考作业8试卷总分:100 得分:100一、单选题 (共 5 道试题,共 50 分)1.The TCP/IP model consist of_ layers.A.threeB.sixC.fourD.two 参考答案:C2.This passage is mainly talking about _.A.Internet Protocol SuiteB.a controlC.pipeliningD.producing 参考答案:A3.It is commonly also known as TCP/IP, named from two of the mos

2、t important protocols in it: The Transmission Control Protocol and _.A.An identifierB.the Internet Protocol(IP)C.An arrayD.ITP 参考答案:B4.The functional groups of protocols and methods are_ , the Transport layer, the Internet Layer, and the Link Layer.A.Active XB.XMLC.HTML LayerD.the Application Layer

3、参考答案:D5.Most computer operating system in use today, including all consumer-targeted systems ,include a TCP/IP _.A.planB.requirementC.implementat-ionD.design 参考答案:C二、阅读理解 (共 1 道试题,共 50 分)10.The term optimization in compiler design refers to the attempts that a compiler makes to produce code that is

4、more efficient than the obvious code. Optimization is thus a misnomer, since there is no way that the code produced by a compiler can be guaranteed to be as fast or faster than any other code that performs the same task.In modern times, the optimization of code that a compiler performs has become bo

5、th more important and more complex. It is more complex because processor architectures have become more complex, yielding more opportunities to improve the way code executes. It is more important because massively parallel computers require substantial optimization, or their performance suffers by o

6、rders of magnitude. With the likely prevalence of multicore machines (computers with chips that have large numbers of processors on them), all compilers will have to face the problem of taking advantage of multiprocessor machines.It is hard, if not impossible, to build a robust compiler out of “hack

7、s”. Thus, an extensive and useful theory has been built up around the problem of optimizing code. The use of a rigorous mathematical foundation allows us to show that an optimization is correct and that it produces the desirable effect for all possible inputs. We shall see, starting in Chapter 9, ho

8、w models such as graphs, matrices, and linear programs are necessary if the compiler is to produce well optimized code.(1).The term optimization in compiler design means _.A.the misnomer that a compiler makes.B.the attempts that a compiler makes.C.the code produced by a compiler.D.the code that is g

9、uaranteed to be faster. 参考答案:B(2).In modern times, the optimization of code has become more important, because _.A.massively parallel computers require substantial optimization.B.processor architectures have become more complex.C.processor architectures have yielded more opportunities to improve the

10、 way code executes.D.the code produced by a compiler can be guaranteed to be faster. 参考答案:A(3).In modern times, the optimization of code _ a compiler performs has become both more important and more complex.A.whoB.whatC.whereD.that 参考答案:D(4).It is _, if not impossible, to build a robust compiler out of “hacks”.A.easyB.difficultC.possibleD.ne