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Oracle Interview Questions And Answers
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automatically to facilitate communication between the user and the server process. 71. What is Server Process ? Server Process handle requests from connected user process. A server process is in charge of communicating with the user process and interacting with ORACLE carry out requests of the associated user process. 72. What are the two types of Server Configurations ? Dedicated Server Configuration and Multi-threaded Server Configuration. 73. What is Dedicated Server Configuration ? In a Dedicated Server Configuration a Server Process handles requests for a Single User Process. 74. What is a Multi-threaded Server Configuration ? In a Multi-threaded Server Configuration many user processes share a group of server process. 75. What is a Parallel Server option in ORACLE ? A configuration for loosely coupled systems where multiple instance share a single physical database is called Parallel Server. 76. Name the ORACLE Background Process ? DBWR - Database Writer. LGWR - Log Writer CKPT - Check Point SMON - System Monitor PMON - Process Monitor ARCH - Archiver RECO - Recover Dnnn - Dispatcher, and LCKn - Lock Snnn - Server. 77. What Does DBWR do ? Database writer writes modified blocks from the database buffer cache to the data files. 78.When Does DBWR write to the database ? DBWR writes when more data needs to be read into the SGA and too few database buffers are free. The least recently used data is written to the data files first. DBWR also writes when CheckPoint occurs. 79. What does LGWR do ? Log Writer (LGWR) writes redo log entries generated in the redo log buffer of the SGA to on-line Redo Log File. 80. When does LGWR write to the database ? LGWR writes redo log entries into an on-line redo log file when transactions commit and the log buffer files are full. 81. What is the function of checkpoint(CKPT)? |