Given this method in a class： public String toString（） { StringBuffer buffer = new StringBuffer（）； buffer.append（‟‟）； buffer.append（this.name）； buffer.append（‟‟）； return buffer.toString（）； } Which is true？（） A、 This code is NOT thread-safe.B、 The programmer can replace StringBuffer with StringBuilder with no other changes.C、 This code will perform well and converting the code to use StringBuilder will not enhance the performance.D、 This code will perform poorly. For better performance， the code should be rewritten： return ““+ this.name + “”；
Given this method in a class： public String toString（） { StringBuffer buffer = new StringBuffer（）； buffer.append（‟<‟）； buffer.append（this.name）； buffer.append（‟>‟）； return buffer.toString（）； } Which is true？（）
- A、 This code is NOT thread-safe.
- B、 The programmer can replace StringBuffer with StringBuilder with no other changes.
- C、 This code will perform well and converting the code to use StringBuilder will not enhance the performance.
- D、 This code will perform poorly. For better performance， the code should be rewritten： return “<“+ this.name + “>”；
相关考题：
___________, he can finish the work in a couple of weeks. A. Giving good healthB. If give good healthC. Given good healthD. If he is good given health
She thought maybe she should consider_______her career and be a full-time motherA.given upB.to give upC.giving upD.having given up
____ a lift in your car, I would not have been home. A、Had you not given meB、I had not givenC、You had not given meD、Had I not given
What are the components of Chinese names? A、Given name and middle namesB、Family nameC、Family name and given nameD、Last name and surname
ETA/PILOT REVERTING means:A.ETA pilot station has been givenB.ETA pilot station will be given afterwardsC.ETA pilot station was not givenD.ETA pilot station is given
证件资料页上出现“Middle name”时，在录入时应（）。A、添加至“Given name”的前面B、添加至“Given name”的后面C、添加至“Given name”的中间D、不予录入
What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations？（）A、immediately after receiving the first packet on the shared tree for a given （S，G）B、after receiving over 1 kb/s traffic onthe shared tree for a given （S，G）C、10 seconds after receiving the first packet on the shared tree for a given （S，G）D、30 seconds after receiving the first packet on the shared tree for a given （S，G）E、after receiving over 10 kb/s traffic onthe shared tree for a given （S，G）
For a given Ethernet network， the failure cycle is set to 5 seconds and the heartbeat rate is set to 2 seconds.Given these values， what is the failure detection time for the network （in seconds）？（）A、5B、10C、12D、20
Why does IS-IS use the SPF algorithm?（）A、to determine the pseudonode IDB、to determine the next hop to a given destinationC、to determine the complete path to a given destinationD、to determine the number of routers present in a given area
与外宾交往时，为了表达彼此的亲近感，可以（）。A、征得对方同意后，直接称呼其名字（given name）（不包括姓的名字）B、不必征得对方同意，直接称呼其名字（given name）C、直接称呼对方全名（given name+family name）
单选题与外宾交往时，为了表达彼此的亲近感，可以（）。A征得对方同意后，直接称呼其名字（given name）（不包括姓的名字）B不必征得对方同意，直接称呼其名字（given name）C直接称呼对方全名（given name+family name）
单选题The TPC curve，one of the hydrostatic curves in a vessel’s plans，gives the number of tons（）.Anecessary to change the angle of list 1°at a given draftBnecessary to change trim 1 cm at a given draftCpressure per square cm on the vessel's hull at a given draftDnecessary to further immerse the vessel 1 cm at a given draft
单选题与外宾交往时，为了表达彼此的亲近感，可以（）。A征得对方同意后，直接称呼其名字（given name）（不包括姓的名字）B直接称呼对方全名（given name + family name）（名字+姓）C不必征得对方同意，直接称呼其名字（given name）
单选题Given the regular expression: 64900 . (65400-65410) Which AS Path matches the given regularexpression?（）A64900 65000 65500B64900 65402 65409C64900 65000 65300 65410D64900 65402 65405 65409
多选题Which two statements are true about the security-related tags in a valid Java EE deployment descriptor？（）AEvery tag must have at least one tag.BA tag can have many tags.CA given tag can apply to only one tag.DA given tag can contain from zero to many tags.EIt is possible to construct a valid tag such that，for a given resource，no user rolescan access that resource.
单选题ETA／PILOT REVERTING means （） ．AETA pilot station has been givenBETA pilot station will be given afterwardsCETA pilot station was not givenDETA pilot station is given
单选题For a given Ethernet network， the failure cycle is set to 5 seconds and the heartbeat rate is set to 2 seconds.Given these values， what is the failure detection time for the network （in seconds）？（）A5B10C12D20
单选题A refrigerant with oil in solution has a （）.Ahigher boiling temperature for a given pressure than does a pure refrigerantBlower boiling temperature for a given pressure than does a pure refrigerantCboiling pressure equal to that of a pure refrigerant at a given pressureDboiling point will not be affected by entrained oil
单选题You report to the IT department in your company that your computer has a connectivity problem. The department requests that you configure your system with the following value： 2001：：f85c：494e：7：4bd4 You need to configure your computer accordingly. What should you do？（）AUse the given value as an IPv6 address.BUse the given value as a DNS suffix search item.CUse the given value as a WEP key for a wireless network.DUse the given value as a manually assigned MAC address.
单选题Why does IS-IS use the SPF algorithm?（）Ato determine the pseudonode IDBto determine the next hop to a given destinationCto determine the complete path to a given destinationDto determine the number of routers present in a given area
单选题What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations？（）Aimmediately after receiving the first packet on the shared tree for a given （S，G）Bafter receiving over 1 kb/s traffic onthe shared tree for a given （S，G）C10 seconds after receiving the first packet on the shared tree for a given （S，G）D30 seconds after receiving the first packet on the shared tree for a given （S，G）Eafter receiving over 10 kb/s traffic onthe shared tree for a given （S，G）
单选题Your database performance has degraded due to frequent checkpointing. What would you do in this scenario？（）Amake redo log files smallerBincrease the size of the checkpoint fileCmake the changes as per the advice given by MTTR AdvisorDmake the changes as per the advice given by Checkpoint Advisor
单选题According to the Bible, the concept of equality in justice means .Aa criminal must be severely punishedBa criminal must be given a punishment that is exactly the same as the crime he has doneCa criminal must be given a punishment that he deservesDa criminal must pay for his crime with his eyes and teeth