Easy introduction to UML (4)-OCP is a progressive Cook, uml-ocpIn the previous chapter, we discussed the SRP principle of one of the five features of object-oriented design (OOD. In this section, we will look at another important principle: OCP principle (Open-Close principle ).Software entity shocould be open for extension, but closed for modificationReview in the previous section: 1. Easy introduction to
Course ObjectivesShare how to gain access to Oracle's OCP certification and exam process pits: Let's learn how to pass the Oracle OCP exam and how to obtain a OCP certificate.
Applicable peopleIt related personnel, college students
Course Introduction
Share how to gain access to Oracle's OCP certification and exa
Introduction to OCP (OCP -- open-closed principle ):
Software entities (classes, modules, functions, etc.) shocould be open for extension, but closed for modification. The software entity should be open to the extension and closed to the modification, that is, the software entity should be extended without modification (which may be achieved through the proxy mode in. net. Open for extension: when new requi
OCP and ocpOpen and closed Principle
Turn: http://baike.baidu.com/view/2493421.htmTurn: http://dev.csdn.net/article/38/38826.shtmOCP (Open Closed Principle) is the core of all object-oriented principles. The goal of software design itself is to encapsulate changes and reduce coupling. The principle of openness and closure is the most direct embodiment of this goal. Other Design Principles often serve to achieve this goal.The core idea of the closed de
Chapter 1 ocp exam guide and ocp exam Guide
Database storage structure:
Physical database storage structure:
Three types of files are required:
ControlFile: multiplexing the controfile multiplexing Control File, pointing to other important files, storing serial numbers and timestamps
Online redo log: redo log files are archived in the online redo log file box. there are a
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SQL obtains all user names, database names, all table names, all field names, and field types. 2009 - 03 - 14 10 : 48 1 . Get all user names: Select Name From Sysusers Where Status = ' 2 ' And Islogin = ' 1 ' Islogin = ' 1 ' AccountIslogin = ' 0 ' RoleSta
OCP will end the competition for the container industry, a disruptive industry's standard format.
Editor's note: the English version of this article is from VentureBeat, which is compiled by the Tiandi Zhuhai sub-rudder. The competition for container standards never stops when Docker-headed containers are sweeping around the world and the original application development and release methods are revolutionized. The competition for standards, the war
The five principles of OO refer to SRP, OCP, LSP, DIP, ISP.SRP--(single Responsibility Principle sole responsibility principle)ocp--Opening and closing principle (Closed for modification; Open for Extension)The recently collated documents are provided to you, here on the LSP focus on the introduction, hope for everyone to help, in the learning and use of OO design, we should understand: the advent of OO ena
Perhaps you know oca, OCP, ocm relationship is a more difficult than a test, a higher than a gold, but you know the specific test subjects, test methods, employment situation difference. If you don't know it, this article will make you glance at the plain.
Difference One: Gold content
OCA: The first step for database professionals to embark on Oracle database authentication
Represents a basic knowledge of Oracle database management.
PHP 5 Principles for object-oriented OOP: Open closure principle--OCP
I. Introduction of OCP (ocp--open-closed Principle): PHP Open Source comSoftware entities (classes,modules,functions,etc.) should is open for extension, but closed for modification.Software entities should be open to extensions and closed to modifications, i.e. software entities should not be m
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
OCP principles in the field of Object-Oriented Design
Keywords: Object-oriented Design1. Introduction to OCP (OCP -- open-closed principle ):Software entities (classes, modules, functions, etc.) shocould be open for extension, but closed for modification. The software entity should be open to the extension and closed to the modification, that is, the software ent
Corresponding certificateOracle Certified Expert-OCP (Oracle certified Professional)Certification Prerequisites For OCP certification, OCA, OCP certification training and exams are required through the Oracle Licensing Training Test Center. OCA is a primer for Oracle certification system, proving that you have mastered the basic knowledge of the database, you can
You may know that OCA, OCP, ocm relationship is a more difficult than a test, a higher than a gold content, but you know the specific test subjects, test methods, the employment situation difference? If you don't know, this easy-to-read article will give you a glance.Difference One: Gold contentOCA: The first step for database professionals to embark on Oracle database certificationRepresents the basic knowledge of Oracle database management.OCP: The
The open-close principle (OCP) is called the cornerstone of OOD and is one of the most important principles of Ood.
This principle was proposed by Master Bertrand Meyer in 1988 (Khan, at that time I am afraid few people in China know Oo, or even what the computer is): software entities shocould be open for extension, but closed for modification. How simple ?! This principle means that the software should be developed for expansion, and the modificatio
1. Q: Is OCP 8 I or 9i?A: OCP is short for Oracle certified professional in the global Oracle certification program. It also has 8i and 9i certification. It depends on the version you want to test and 9i is an 8i upgrade.
2. Q: How Much Can OCP earn? Is the input-output ratio suitable?A: oracle is one of the largest database providers in the world. Currently, the
Today, December 6, 2016, OCM study has more than half, in less than 1 months time, ready to go to participate in OCM examination, now share the course of the test OCP.
Test 051,052 OCA Test certificate sent to your corresponding mailbox, after 053 applications submitted hands on to apply for OCP certificate. (Online inquiry of pass score) examination number subject Full name examination time (minutes) probl
Software composition entities should be extensible, but cannot be modified. [Software entities shocould be open for extension, yet closed for Modification ] Openness-closure rules 1. The open-closed principle assumes that we should try to design modules that never need to be changed. 2. We can add newCodeTo expand the behavior of the system. We cannot modify the existing code. 3. OCP-compliant modules must meet two standards: 4. scalability, t
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