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Open-closed principle Software"Open-Close principle" in Design" This principle was first proposed by Bertrand Meyer.Entities shocould be open for extension, but closedModification. It means that a software entity should be open to extensions and closed to modifications. That is to say, when designing a module, we should enable this module before it is not modified.Extension. In other words, you do not need to modify the source code.To change the behavior of this module. Satisfying the

Process for failing to receive the certificate (transferred from itpub) Reporter: fulfillment@prometric.com address into fulfillment@thomson.com, if you do not know it all try.Reporter: The following content is for 04 years. After waiting for a long time, if you have not received the certificate, don't worry, because as long as you pass the exam, it is a matter of time to get the certificate. However, due to shipping, address error, and other reasons, you may need to re-print the mail, you can

1. ou: Oracle University2. Instructor name *** @ oracle.com 3. Oca. OCP. OCMOCM requires that OCP Be the first to pass two advanced courses, lab for 2 days4. course scheduleAm-AmPM-PM5. Q Ekit Teaching MaterialsOther Oracle Application SystemsOracle IASJ2EE server: SolarisOracle applicaction 11i Oracle jdevelop: Oracle Developer Suite10g means grid.Otn.oracle.com global Oracle Forum Global Grid Forum: GCF

network connection to the ③ database server is interrupted, and the computer that is running the client tool crashes. OCP Real Title Walkthrough 171, transaction, transaction end 171. Which three statements/commands would cause a transaction to-end? (Choose three.) (which three statements/commands can cause a transaction to end.) Select three) A. COMMIT B. SELECT C. CREATE D. ROLLBACK E. savepoint Answer: ACD 173, transaction, transaction completion

Finally put OCP DBA's course all finished, tired Ah! Overall Oracle certification is worth the test. I have CCNP, MCSE certificate, but through the DBA examination, feel not only deepened the understanding of modern databases, but also enrich the knowledge structure of computer science. I think, in some ways, Oracle databases even have some operating system capabilities. Oracle's exams, there are quite a few things to remember, the exam requirements

Tags: 11g OCP database Oracle Certification Exam Exam QuestionsQUESTION 1You notice the performance of the database have degraded because of frequent checkpoints.Which resolve the issue? (Choose.)A. Disable Automatic checkpoint TuningB. Check the size of the redo log file size and increase the size if it is smallC. Set the Fast_start_mttr_target parameter as per the advice given by the MTTR AdvisorD. Decrease the number of redo log members if there is

Oracle SQL Language DDL and Object Management-beyond OCP proficient in Oracle Video tutorial training 27This course introduces:Oracle Video tutorial, wind Brother this set of Oracle Tutorial training is the Oracle SQL language DDL and Object management, the course content is detailed as follows:Describes table schema objects and the data types available in tablesCreation and management of tablesCreation and use of temporary tablesCreation and manageme

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Oracle Performance Optimization Performance Diagnostic Tool-beyond OCP proficient in Oracle video tutorial Training 33Course IntroductionOracle Video tutorial, wind Brother this set of Oracle Tutorial training Oracle Performance optimization Statistical information management, the course content is as follows:1.Oracle self-bring performance diagnostic Tool introduction2. Performance tool operation process in daily maintenanceCollection time for 3.awr

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JavaScript: S.O.L. I. D. Open and Close principles OCPPreface In this chapter, we will explain part 1 of The Five Principles of S.O.L. I. D: Implementation of The JavaScript language, and The Principle of Open and Closed OCP (The Open/Closed Principle ). The opening/closing principle is described as follows: Software entities (classes, modules, functions, etc .) shocould be open for extension but closed for modification. software entities (classes, mo

PrefaceIn this chapter, we will explain part 1 of The Five Principles of S.O.L. I. D: Implementation of The JavaScript language, and The Principle of Open and Closed OCP (The Open/Closed Principle ).The opening/closing principle is described as follows:Software entities (classes, modules, functions, etc.) shocould be open for extension but closed for modification.Software entities (classes, modules, methods, etc.) should be open to extensions and clos

133.You created a profile app_user and assigned it to the users. After a month, you decide to drop theProfile. Some user sessions is currently connected to the database instance and is using theApp_user profile.This command was used to drop the profile:sql> DROP profile App_user;Which statement describes the result?A. The command produces an error.B. The profile was dropped and current user sessions use the DEFAULT profile immediately.C. The profile was dropped and only the subsequent user sessi

disconnected, service process shutdown3. Background process: DBWR, LGWR, Pmon, Smon, CKPTTo view the background process statements that are being executed in the current system:Select name from v$bgprocess where paddr =============================================================================================================== ======================== memory Structure (SGA)--video 21: The installation section of the database is skipped ... Memory structure (SGA)--video 22: The installation par

-oriented development How to use the open/closed principle: Abstract constraints First, through the interface or abstract class constraints extension, the extension is bounded, not allowed to appear in the interface or abstract class does not exist in the public method;Second, parameter types, reference objects use interfaces or abstract classes as much as possible, rather than implementing classes;Thirdly, the abstraction layer is kept as stable as possible, and modifications

) and the recovery catalog. You want to copyThe production database to another host, SHOST2, tests the new application.When you ensure that the backup of the target database is accessible on the new host, you mustDo you want to restore and restore a backup of your test environment?A recover control file from backup with NOCATALOG option and recover data fileA correct, b error is that the topic requires what must, and if the directory structure is the same, it does not need set newnameFor each da

-00312: Online log 1 thread 1: ' E:\ORACLE\ORADATA\ORCL\REDO01. LOG 'View ' E:\ORACLE\ORADATA...\ file, no REDO01.LOG file, only REDO03.LOG, obviously, this is the root cause of ORACLE boot failure, and ORA-01033 error is only a superficial phenomenon. Find the root of the problem is good to do, Google, there is a solution, can not help but once again feel that there is no solution to the dog world problem. Here's how to fix it:C:\sqlplus/nologSql>connect Sys/as SYSDBASql>alter Database Clear Lo