选择题(每题一分)(50)

a.a digital signatureb.a prime numberc.DESd.a hash function
37.The RSA algorithm is the basis of aencryption method.
a.public keyb.secret keyc.private keyd.all of the above
11.The three steps in the running of a program on a computer are performedin this specific order.a.fetch, execute, and decodeb.decode, execute, and fetchc.fetch, decode , and executed.decode, fetch, and execute
a.black boxb.white boxc.breadboxd.a and b
29.is the breaking up of a large program into small parts.
a.Couplingb.Incrementingc.Obsolescenced.Modularity
30.Code reusability, interoperability, and portability are factors important to the
22.is a pictorial representation of an algorithm.
a.A flowchartb.A structure chartc.Pseudocoded.An algorithm
23.The only language understood by computer hardware is alanguage.
43.are keys that hash to the same location in the data file.
a.Collisionsb.Bucketsc.Synonymsd.Linked lists
42.In thehashing method, the key is divided by the file size, and the address is the remainder plus 1.
a.directb.modulo divisionc.division remainderd.digit extraction
a.sampleb.quantizedc.codedd.all of the above
5.If the ASCII code for Z is 1011010, then the ASCII code for z is
a.1011011b.1011110c.1111010d.0011010
6.Innumber representation, 1111 in memory represent -0.
25.The compiler consists of aand a.
a.preprocessor, loaderb.text editor, loaderc.preprocessor, translatord.liner, preprocessor
26.The UNIX operating system is written in a language called.
1、選擇題(每題一分)（50%）
1.A step-by-step solution to a problem is called
a.hardwareb.an operating systemc.a computer languaged.an algorithm
2.FORTRAN and COBOL are examples of
20.The smallest storage area on a magnetic disk that can be accessed at one time is a.a.trackb.sectorc.framed.head
21.To set the value of a variable before any processing occurs, youthe variable.a.defineb.iteratec.initialized.increase
12.Which optical storage device has the highest capacity?
a.CD-ROMb.CD-Rc.CD-RWd.DVD
13.Thememory contains a copyofa portion of main memory.
a.CPUb.cachec.maind.ROM
of software.
a.operabilityb.maintainabilityc.transferabilityd.longevity
31.Each element in a record is called.
a.a variableb.an indexc.a fieldd.a node
32.is an ordered collection of data in which each element contains the location of the next element.
a.PDQb.SQLc.LESd.PHP
40.Of the various database models, themodel is the most prevalent today.
workc.relationald.linked list
41.When a sequential file is updated, thefile contains the change to be applied.a.new masterb.old masterc.transactiond.error report
a.hardwareb.operating puter languaged.algorithms
3.In extended ASCII, each symbol isbits.a.7b.8c.9d.10
4.When you want to download music to a computer, the audio signal must be
a.An arrayb.A recordc.A linked listd.A struct
33.A Turing machine has three components:.
a.tape, memory, and read/write headb.disk, controller, and read/write head
c.tape, controller, and read/write headd.disk, memory, and controller
34.We useto denote a program’s complexity.
a.the Turing machineb.big-O notationc.factorialsd.the simple language
9.For the binaryoperator, if the input is two 1’s, the output is 0
a.ANDb.ORc.XORd.all of the above
10.In themethod to synchronize the operation of the CPUwith the I/O device, a large block of data can be passed from an I/O device to memory directly.a.programmed I/Ob.interrupt-driven I/Oc.DMAd.isolated I/O
a.signb.exponentc.mantissad.any of the above
8.Which number representation method is most widely used for storing number in a computer?
a.two’s complementb.sign-and-magnitudec.one’s complementd.unsigned integer
a.Cb.FORTRANc.C++d.JAVA
27.In C++,is the hiding of data and operations from the user.
a.modularityb.polymorphismc.inheritanced.encapsulation
28.Testing a software package can involvetesting.
a.machineb.symbolicc.high-leveld.natrral
24.Theassembles precompiled units from different sources into an executable program.a.preprocessorb.text editorc.linkerd.loader
35.In the digital signature method, the sender uses his or herkey to sign the message.a.publicb.privatec.secretd.skeleton
36.To create a digest of a document, you can use.
38.An example of lossy compression is.
a.JPEGb.run-length encodingc.Lempel Ziv encodingd.differential encoding