Have you prepared for your interview, can you answer these basic Interview questions on Oracle.
Oracle is a database server that is used to handle data in a structured manner. It lets its users to retrieve and to store data in a way that multiple users can access similar data at the same time. Oracle achieves this with high efficiency. Many security checks are followed to limit access to authorized users only and to retrieve data in case of accidental data loss.
Each operating Oracle database is associated with an Oracle instance. As soon as a database server starts the database, it is assigned a memory area by Oracle called System Global Area (SGA) and starts one or more than one processes. The SGA and Oracle processes together are referred to as an Oracle instance. The process and memory of an instance are used to efficiently handle data used by multiple users.
Parameter file is a file having a track of initialization parameters and the matching values. The two types of Oracle supported parameter files are:
Based on individual installations users can specify their individual initialization parameters.
Every user is given particular attributes identified by a username termed as a user account. The below can be incorporated into the user attributes:
Source codes of PL/SQL V2.2 made available with Oracle 7.2 are protected by implementing the binary wrapper. A stand-alone function does this by transforming the source code of PL/SQL to a portable binary object code. Thus the software can be distributed without the proprietary methods and algorithms getting exposed. Such scripts can still be understood and executed by SQL*DBA and SQL*Plus. The only precaution to be taken is that “decode” command shouldn’t be available.
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