A company that makes Computer Assisted Design (CAD) software has, within its application, some utility classes that are used to perform 3D rendering tasks. The company‘s chief scientist has just improved the performance of one of the utility classes‘ key rendering algorithms, and has assigned a programmer to replace the old algorithm with the new algorithm. When the programmer begins researching the utility classes, she is happy to discover that the algorithm to be replaced exists in only one class. The programmer reviews that class‘s API, and replaces the old algorithm with the new algorithm, being careful that her changes adhere strictly to the class‘s API. Once testing has begun, the programmer discovers that other classes that use the class she changed are no longer working properly.What design flaw is most likely the cause of these new bugs?()
A.Inheritance
B.Tight coupling
C.Low cohesion
D.High cohesion
E.Loose coupling
F.Object immutability
第1题
Version Query that was executed after the preceding commands.What could be the possible cause for the query not displaying any row?()
A. Flashback logging is not enabled for the database.
B. The changes made to the table are not committed.
C. Supplemental logging is not enabled for the database.
D. The database is not configured in ARCHIVELOG mode.
第2题
A.usermanagedcompleterecovery
B.usermanagedincompleterecovery
C.RMAN-basedcompleterecovery
D.RMAN-basedincompleterecovery
第3题
NS_FROM_CURSOR_CACHE(sql_id=>?9twu5t2dn5xd?;END;WhichstatementistrueabouttheplanbeingloadedintotheSQLplanbaselinebytheabovecommand?()
A.ItisloadedwiththeFIXEDstatus.
B.ItisloadedwiththeACCEPTEDstatus.
C.ItisnotloadedwiththeENABLEDstatus.
D.ItisnotloadedwiththeACCEPTEDstatus.
第4题
alteredSQL>CREATETABLEempTABLESPACEtbsfdASSELECT*FROMhr.employees;Tablecreated.Further,youexecutedthefollowingcommandtodropthetable:SQL>DROPTABLEemp;Tabledropped.Whathappensinthisscenario?()
A.ThetableismovedtotheSYSAUXtablespace.
B.ThetableismovedtotheSYSTEMtablespace.
C.Thetableisremovedfromthedatabasepermanently.
D.ThetableisrenamedandremainsintheTBSFDtablespace.
第6题
A.STARTUPMOUNTEXCLUSIVEALTERDATABASEFLASHBACKON;ALTERDATABASEOPEN;
B.STARTUPMOUNTALTERDATABASEFLASHBACKON;ALTERDATABASEOPENRESETLOGS;
C.STARTUPMOUNTEXCLUSIVEATLERDATABASEARCHIVELOG;ALTERDATABASEFLASHBACKON;ALTERDATABASEOPENRESETLOGS;
D.STARTUPMOUNTALTERDATABASEARCHIVELOG;ALTERDATABASEFLASHBACKON;ALTERDATABASEOPEN;
第7题
A. 90 MB
B. 272 MB
C. 362 MB
D. 1,440 MB
第8题
A.DBWn
B.RECO
C.RVWR
D.LGWR
第9题
A.Itisrecommendedforthecolumnsthathaveuniquevalues.
B.ItcanbeconvertedtoaB-treeindexbyusingtheALTERINDEXcommand.
C.Ithasabitmapsegmentforeachdistinctvalueinthekeycolumn,containingastringofbitsinwhicheachbitrepresentsthepresenceorabsenceofakeycolumnvalue.
D.Updatingthekeycolumnlocksthewholebitmapsegmentthatcontainsthebitforthekeyvaluetobeupdated.
第10题
A.
B.
C.
D.
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