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●The two goals of an operation system are（71）and efficiency.
（71）
A.convenience
B.quick
C.optimize
D.standardize
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● (71) now plays a central role in the global economy.A. Data B. CPU C. Information D. Operation
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WebSQL is a SQL-like ___(71)___ language for extracting information from the web. Its capabilities for performing navigation of web ___(72)___ make it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a ___(73)___ , all the pages that can be reached from a given URL through ___(74)___ that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common ___(75)___ Interface.(71)A. query B. transaction C. communication D. programming(72)A. browsers B. servers C. hypertexts D. clients(73)A. hypertext B. page C. protocol D. operation(74)A. paths B. chips C. tools D. directories(75)A. Router B. Device C. Computer D. Gateway
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WebSQL is a SQL-like （71） language for extracting information from the web. Itscapabilities for performing navigation of web （72） make it a useful tool for automatingseveral web-related tasks that require the systematic processing of either all the links in a（73） , all the pages that can be reached from a given URL through （74） that match apattern, or a combination of both. WebSQL also provides transparent access to index servers thatcan be queried via the Common （75） Interface.（71）A. query B. transaction C. communication D. programming（72）A. browsers B. servers C. hypertexts D. clients（73）A. hypertext B. page C. protocol D. operation（74）A. paths B. chips C. tools D. directories（75）A. Router B. Device C. Computer D. Gateway
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●SDLC was invented by IBM to replace the older Bisynchronous protocol for wide area connections between IBM equipment ．A varietion of the (71) protocol called NRM is essentially the same as SDLC．SDLC is (72) protocol like HDLC , Frame. Relay or X．25．An SDLC network is made up of (73) that controls all communications , and (74) ．It is capable of (75) operation, but almost all practical applications are strictly half duplex．(71) A．HDLCB．Frame. RelayC．X．25D．X．21(72) A．a peer to peerB．a point-to-pointC．not a peer to peerD．a peer to peers(73) A．a primary stationB．one or more primary stationsC．a secondary stationD．one or more secondary stations(74) A．a primary stationB．one or more primary stationsC．a secondary stationD．one or more secondary stations(75) A．half duplexB．full duplexC．half or full duplexD．half and full duplex
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Electronic mail and filing permit a user to compose and transmit a message on an office(71)system. In the early 1970s, the ARPANET community developed a number of such systems which have been heavily used. Through standard message format(72), several hundred different computers and electronic mail interfaces are specification of how(73)and return addresses should appear on envelopes and which sizes are allowable for envelopes. In the electronic message world, they describe what(74)of characters are required at the(75)of a message to identify the sending and receiving mailboxes.A．robotizationB．automationC．dynamicD．action
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) ● (71 now plays a central role in the global economy.(71)A. DataB. CPUC. InformationD. Operation
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以下程序段的输出结果为 ( )int j=2；switch(j){case 2：System.out.print("two.")；case 2+1：System.out.println("three.")；breakdefault：System.out.println("value is"+j)；break；}A．two.three.B．two.C．three.D．value is 2
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编译和执行以下代码，输出结果是( )。 int i=1; switch (i) { case 0: System.out.print("zero,"); break; case 1: System.out.print("one,"); case 2: System.out.print("two,"); default: System.out.println("default"); }A．one，B．one,two,C．one,two,defaultD．default
考题
SDLC was invented by IBM to replace the older Bisynchronous protocol for wide area connections between IBM equipment . A varietion of the (71) protocol called NRM is essentially the same as SDLC. SDLC is (72) protocol like HDLC, Frame. Relay or X.25. An SDLC network is made up of (73) that controls all communications, and (74) . It is capable of (75) operation, but almost all practical applications are strictly half duplex.A．HDLCB．Frame. RelayC．X.25D．X.21
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OSPF is a link-state routing protocol。It is designed to be run internal to a single __（71）__system。Each OSPF router maintains an identical __（72）__ describing the autonomous system’s topology。From this database，a routing table is calculated by constructing a shortest-path __（73）__。OSPF recalculates routes quickly in the face of topological changes，utilizing a minimum of routing __（74）__ traffic。OSPF provides support for equal-cost multipath。An area routing capability is provided，enabling an additional level of routing protection and a reduction in routing protocol__（75）__。71A.autonomousB.networkC.computerD.server
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