ocp java

This time to bring you the PHP closure principle (OCP) Use case analysis, the PHP closure principle (OCP) to use the attention of what, the following is the actual case, together to see. 1. What is "open-closed" With the increasing of the scale of software system, the complexity of maintenance and modification of software system continues to improve, this predicament has prompted the French engineering aca

1: OCP: open-closed Principle* Open for extension* Close for Modification2: CaseCallet prostitutes are those who pull customers and receive sexual compensation. Let's divide the prostitutes by their positions. Prostitutes have different prices for different identities. 3: DesignOur general design is like this.Class callet{Man man;Public void getmoney (){Man. Pay ();}}Class man{Public void pay (){}} But now callet prostitutes have another customer

When creating a unique constraint, the OCP will forcibly create or reuse the index www.2cto.com (if no index exists in the previous column, the created index is a unique index. In this case, the index name and the constraint name are the same, and the index cannot be deleted. When unique constraint is deleted, unique index is cascaded. ② If an index already exists in the column, the previous index will be reused without changing the index type. When w

OCP question analysis _ 043: buffer cache and hit rate calculation method: www.2cto.com SELECT name, (1-(physical_reads/(db_block_gets + consistent_gets) * 100 H_RATIO FROM v $ ratio; the hit rate, as the standard for measuring the performance of the database, is already an old man's experience. Today, the hit rate can be used as a reference through the oracle wait interface, but the hit rate is not necessarily related to the system performance level,

Analysis of OCP question _ 007: synonym synonyms are the alias of the base table. They are defined only in the data dictionary. They do not store synonyms. They provide location transparency for distributed databases. Accessing resources in different regions is just like accessing local resources. www.2cto.com (I) Syntax:Private synonyms without public are the synonyms created by common users. They are private, this is because only the user who create

OCP question parsing _ 043: flashback transaction query can obtain the historical information of the specified transaction from FLASHBACK_TRANSACTION_QUERY and Undo_ SQL through this UNDO_ SQL, query the operations performed by a specific firm, and then we can restore specific transactions. flashback transaction query test www.2cto.com OCP question: [SQL] 13. you executed the following query: SELECT operati

The database has opened OCP notes. Thank you very much for the blog. Thank you. I _like_cpp http://blog.csdn.net/ I _like_cpp Among them, OCP has a question like this: Q606. you realize that the control file is damaged in your production database. After restoring the control file from autobackup, what is the next step that you must do to proceed with the database recovery? A. Mount the database B. Open the

After completing the last exam at noon, I always thought that I would be excited after I passed the exam. Who knows that my performance was calm and I was surprised, as if I thought it was something else. For a long time, there have been two OCP goals: one is to make a summary of Oracle over the past six years; the other is to verify that after so many years of work, I still have not lost my self-learning ability, this meaning should be far greater th

I finally completed all the OCP DBA courses. Tired! In general, Oracle certification is worth the test. I have a ccnp and MCSE certificate, but after passing the DBA examination, I feel that I have not only deepened my understanding of modern databases, but also enriched the knowledge structure of computer science. In my opinion, Oracle databases even have some operating system functions. There are quite a few things to remember about Oracle exams.

Design principles (1) "Open-Close" principles (OCP) The cornerstone of classical mechanics is Newton's three major laws. The first cornerstone of object-oriented reusable design is the so-called Open-Closed Principle (OCP ).I. What is the principle of opening/closing? The principle of "open-close" is that a software entity should be open to expansion and closed to modification. This principle was first prop

Just passed OCP last exam, from the training to review and complete the exam for a total of one months, the whole process is very compact also very nervous, very lucky or passed the exam, also not in vain this month's hard. First is the training, has been engaged in development work, although also has been using the Oracle database, but is not a DBA, so for the training of DBA knowledge is very important, without this workshop I and II training will

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Oracle OCP Notes (31) using the Flashback featureOracle's flashback feature is supported by one of 3 database architectures: Undo data, Flashback recovery area, and Recycle Bin.Undoing data in the undo Tablespace not only supports transaction rollback, but also most of the flashback table operations. Flashback Data Archives allows querying a previous version of a table row, which provides a zone in one or more table spaces outside of the undo tablespa

Worked for a system integration company that did not use Oracle for less than two years. Deployed and maintained from stand-alone to RAC, there is an initial understanding of Oracle's architecture, but it's basically what part of the section is used to learn which part. The middle process is tortuous and complicated. Learn from learning to install Oracle, Import Export, Rman Backup, AWR report analysis, RAC Build, ASM Disk Management, cluster troubleshooting, and research. This year, thanks to

Tags: oracle 11g OCP test Bank Analysis certification Exam TU Institute Oracle Oracle OCP Certification ExamQUESTION 7See the Exhibit:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/58/D3/wKioL1S-ANjxQfvvAAGCoebVEEQ971.jpg "title=" Picture 1.png "alt=" wkiol1s-anjxqfvvaagcoebveeq971.jpg "/> Which statements is true regarding the USERS tablespace? (Choose all, apply.)A. a bitmap is used to the re