oracle soa interview questions

after the real object is called.Proxy mode,The proxy class and the proxy class implement the same interfaceAn instance of a proxy class in a proxy classBehavioral patterns: Focus on communication between objectsSuch as: Responsibility chain mode, iterator mode, command modeResponsibility chain ModelSimilar interceptors, etc.Command mode:Separates callers from Callee's behaviorInterpreter mode:Each syntax is an interpreter classIterator mode:Change the collection class's view traversal and add a

rewrite the aof file, the performance impact of this persistence is minimal, but the aof file will continue to grow, aof file over the General Assembly to affect the recovery speed of master restart. Master should not do any persistent work, including memory snapshots and aof log files, in particular, do not enable memory snapshots to persist, if the data is more critical, a slave open aof backup data, the policy is synchronized once per second. Master calls bgrewriteaof rewrite aof file, a

The following articles mainly introduce the example of Oracle Database DBA interview questions. This article describes the basic mode of Oracle Database DBA interview questions in a one-Answer manner, the following is an introduct

"Summary catalogue of common interview questions >>>" 001 Database Paging Query SELECT * FROM (Select T.*,rownum from table1 t where condition)where Rownum> (pangeNow-1) *pagesize and rownum002 Transaction Concepts Answer: A transaction is a mechanism that ensures that multiple SQL statements are handled as a single unit of work. Transactions have the following effects: 　　consistency : Simultaneous querie

Label:"Common interview questions Summary catalogue >>>" 001 Database Paging Query SELECT * FROM (Select T.*,rownum from table1 t where condition)where Rownum> (pangeNow-1) *pagesize and rownum 002 Business Concepts Answer: A transaction is a mechanism that ensures that multiple SQL statements are treated as a single unit of work. A transaction has the following effects: 　　consistency : Simultaneous queries

ORACLE interview Questions-Technical articles 1. Explain the different points of cold and hot backup and their advantages Answer: Hot-backed databases for archive mode, backed up while the database is still working. A cold backup is a database that is backed up after the database is closed and applies to all schemas. The advantage of hot backup is that when the

from (select N2.team,n2.year from ( SELECT * from the NBA) N1 Join (SELECT * from NBA) N2 on n1.team=n2.team where n1.year=n2.year+1) NN GROUP by (Nn.year-rownum) order by Beginyear ;The following is the final execution result: 4. Summary thinkingIn the face of similar interview topics or problems, although the knowledge points involved (sub-query, connection query, etc.) are not many, but because there are some data conversion and query nest