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Oracle DBA Interview Questions: A Comprehensive Guide by Ashima Mittal



Oracle DBA Interview Questions by Ashima Mittal PDF Free 17




Introduction




If you are looking for a career in database administration, Oracle DBA is one of the most popular and rewarding options. Oracle DBA stands for Oracle Database Administrator, which is a person who manages, maintains, secures, and optimizes Oracle databases. Oracle databases are widely used by many organizations for storing, processing, and analyzing large amounts of data.




oracle dba interview questions by ashima mittal pdf free 17


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As an Oracle DBA, you need to have a strong knowledge of database concepts, SQL, PL/SQL, backup and recovery, performance tuning, security, troubleshooting, and more. You also need to have good communication, problem-solving, analytical, and teamwork skills. To become an Oracle DBA, you need to have a bachelor's degree in computer science or related field, or equivalent work experience. You may also need to obtain one or more certifications from Oracle Corporation, such as OCA, OCP, OCM, or OCE.


To land your dream job as an Oracle DBA, you need to ace your interview with confidence and competence. In this article, we will provide you with the top 17 Oracle DBA interview questions and answers that will help you prepare for your interview. These questions are based on the book "Oracle DBA Interview Questions by Ashima Mittal" which is available as a PDF for free download. We will also provide you with some tips and resources for further learning at the end of the article.


Top 17 Oracle DBA Interview Questions and Answers




Question 1: What is an Oracle database and what are its components?




Answer: An Oracle database is a collection of data that is organized in a logical and physical structure. It consists of the following components:


  • A database instance, which is a set of memory structures and background processes that manage and access the data.



  • A database schema, which is a set of logical structures that define the data and its relationships.



  • A database file, which is a physical file that stores the data on the disk.



  • A control file, which is a file that records the physical structure and status of the database.



  • A redo log file, which is a file that records the changes made to the data.



  • An archive log file, which is a file that stores a copy of the redo log file for backup and recovery purposes.



  • A parameter file, which is a file that contains the initialization parameters for the database instance.



  • A password file, which is a file that contains the usernames and passwords of the database users.



Question 2: What are the different types of files in Oracle database?




Answer: There are three main types of files in Oracle database:


  • Data files, which store the actual data in the database. They are organized into logical units called tablespaces.