43. 9. Q8. What are temporal data types in Oracle? This query will display row numbers and the field values from the given table. 39. List of items is set to be a collection of list of items. Applications can be scheduled and migrated across servers in the grid. Golden gate 7. iframe.style.height=args[1] + "px"; There are no differences between the join. 7 thoughts on “Top Oracle DBA Interview Questions and Answers”. Hence the name ‘Grid’. 2. Synchronize converted data with Oracle database After Conversion - Right Click the targeted database and - click synchronize with database. This blog is the perfect guide for you to learn all the concepts related to SQL, Oracle, MS SQL Server and MySQL database. The frequently asked questions from oracle database are given below. The Oracle Grid architecture pools large numbers of servers, storage, and networks into a flexible, on-demand computing resource for enterprise computing needs. For my data structure, I would keep a list that would have a line for each line in the smallest file, and I would write in this line my count. Yes, we can store pictures in the database by Long Raw Data type. This is really helpful. What are the different Oracle Database objects? 7 Database Administrator Interview Questions and Answers . It lets its users to retrieve and … If you cannot use direct upgrade, you’ll have to use database migration methods that take on much more complexity. A privilege is nothing but right to execute an SQL query or to access another user object. Our Oracle DBA Questions and answers are very simple and have more examples for your better understanding. 3. 1. Q4. Each cursor in Oracle has set of attributes which enables an application program to test the state of the cursor. if(window.document.exitFullscreen) window.document.exitFullscreen(); Reduce Total Cost of Operation 1.1. break; src=src.substr(0, src.indexOf("?")) Listed below are the two parts into which this Oracle DBA Interview Questions blog is divided: var script=document.createElement('script'); Basic. can you write the script instead of verbal english, Thank you very much for giving an opportunity to recap knowledge over Oracle DB. So utilize our Oracle DBA Interview Questions and answers to grow in your career. An integrity constraint is a declaration defined a business rule for a table column. Oracle has been developed using C Language. What is the difference between TRANSLATE and REPLACE? if(isJotForm&&"contentWindow" in iframe&&"postMessage" in iframe.contentWindow){ break; A database buffer cache stores the data in memory for quicker access. A grid does not assume that all servers in it are running the same set of applications. 9 data migration ~1~null~1~ interview questions. One or more data files. The redo logs track and store all the changes made to the database. Duplicate rows in the table can be deleted by using ROWID. VArray is an oracle data type used to have columns containing multivalued attributes and it can hold bounded array of values. With an additional 50 professionally written interview answer examples. Most Popular Database Interview Questions And Answers. var isJotForm=(e.origin.indexOf("jotform") > -1) ? if(src&&src.indexOf("?") Select is not a DML command rather it’s a DRL command. Q2. Looking for more q&a in this forum. Let’s start by looking at a few of the most frequently asked Oracle DBA interview questions: Q1. What is the fastest query method to fetch data from the table? A Partial Backup is any operating system backup short of a full backup, taken while the database is open or shut down. Database migration projects can be hard, especially your first one, but the benefits of migrating your database to the cloud are significantly greater than the challenges migrations can present. I have divided the questions into 3 categories Technical Interview Questions, Unix Related questions asked to an Oracle Database Administrator (DBA) and Backup and Recovery Interview Questions commonly asked in Oracle DBA interview. This datatype is used to store binary data for 2 gigabytes of length. List out the tools for administering the database. How can we view last record added to a table? Physical Standby 3. Oracle is a secured database that is widely used in multinational companies. Your email address will not be published. Duplicate rows can be removed by using the keyword DISTINCT in the select statement. How to display employee records who gets more salary than the average salary in the department? 46. Every Oracle Database migration requires a discovery and planning phase. Enroll now! Merge statement is used to select rows from one or more data source for updating and insertion into a table or a view. This is really a good job and helpful. case "scrollIntoView": Given below is a list of most popular Database interview questions and answers for your reference. Oracle Database Administrators, also known as Oracle DBAs, are responsible for the implementation and management of a company’s Oracle database system. We have compiled a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. Oracle interview questions . Employee tables join with the Salary tables with the Employee ID. Grants can be provided by the owner or creator of an object. Q9. Oracle Database Interview Questions and Answers such as How can I prevent the Alert Log from becoming very large, How I can determine which SQL statement triggered an Oracle error, What are the parameter recommendations for Oracle, Where can I find the Oracle installation or upgrade CDs etc. Get ready for the industry with an Oracle DBA Certification now! It also hold entire sub table. Top 50 WebLogic Interview Questions & Answers, Top 25 Microsoft PowerPoint Interview Questions & Answers, Two dashes(–) before beginning of the line – Single statement, /*—— */ is used to represent it as comments for block of statement, Date Data Type – Different formats of Dates, TimeStamp Data Type – Different formats of Time Stamp, Interval Data Type – Interval between dates and time, NULL – It is to indicate that particular column can contain NULL values, NOT NULL – It is to indicate that particular column cannot contain NULL values, CHECK – Validate that values in the given column to meet the specific criteria, DEFAULT – It is to indicate the value is assigned to default value, Tables – set of elements organized in vertical and horizontal, Views  – Virtual table derived from one or more tables, Indexes – Performance tuning method for processing the records, Sequences – Multiple users generate unique numbers, Tablespaces – Logical storage unit in Oracle. 40. var urls={"docurl":encodeURIComponent(document.URL),"referrer":encodeURIComponent(document.referrer)}; Cross join gives cartesian product of two tables – Rows from first table is multiplied with another table which is called cartesian product. Then do a similar process for the LAST 10, this should be even easier. Q9. The WITH CHECK option clause specifies check level to be done in DML statements.  1. iframe.style.height=window.innerHeight + "px"; What is an Oracle index? 1. 5. From 10g onwards we are using startup upgrade to upgrade the database. How would you handle data loss during a database migration? Privilege can be given as system privilege or user privilege. This means that you do not need to install Oracle Database 11g Release 2 (11.2.0.1) before installing Oracle Database 11g Release 2 (11.2.0.2). You have done a great job. At the highest level, the idea of grid computing is computing as a utility. Contingency costs 2. For example, we can run different applications on a grid of several linked database servers. Oracle DBA Interview Questions and Answers - Patching,Cloning and Upgrade In which months oracle release CPU patches? Practice 25 Data Migration Interview Questions with professional interview answer examples with advice on how to answer each question. This perspective of utility computing is, of course, a ‘client-side’ view. As an Oracle DBA, we have to carry out the following tasks: In a small-to-midsize database environment, a single DBA might be the sole person performing all these tasks. Rename is a permanent name given to a table or a column whereas Alias is a temporary name given to a table or column. Oracle Database Interview Question Set-30 My DBA Community, My today’s post is very important for those who are looking for a job and preparing for an Interview. It would be great to make more additions to this Q/A list. Answer: Oracle Database is a relational database management system (RDBMS) which is used to store and retrieve the large amounts of data. view answer Replication Troubleshooting using DBMS_REFRESH: view answer How to work with Oracle Data Pump? Storage costs 1.5. case "reloadPage": Oracle Database Interview Questions are the frequently asked questions in the interview process for database related job roles. This is used as a place holder or represented it in as default entry to indicate that there is no actual data present. } window.attachEvent("onmessage", handleIFrameMessage); A Data Guard ensures data protection and high availability of data, and a control file records the physical structure of the database. NULL value represents missing or unknown data. 37. A cursor variable is a kind of reference type. Cross join will produce result which combines each row from the first table with the each row from the second table.Â. Operations costs 1.3. This can be evaluated as if it were an independent query. I am writing Oracle Database interview questions. ifr.src=src + "?" Example is –. What are the benefits of ORDBMS? else if(window.document.mozCancelFullScreen) window.document.mozCancelFullScreen(); case "exitFullscreen": 12 is the maximum number of triggers that can be applied to a single table. Data Manipulation Language (DML) is used to access and manipulate data in the existing objects.  DML statements are insert, select, update and delete and it won’t implicitly commit the current transaction. This shouldn’t be too hard. Q10. The DUAL table is a one-column table present in oracle database.  The table has a single VARCHAR2(1) column called DUMMY which has a value of ‘X’. Administration costs 1.2. Q3. 50. In large enterprise environments, the whole job is often divided among several DBAs titled as Database Security Administrator or Database Tuning Expert, each with his/her own area of specialties. Do you know: Oracle Apps DBA Interview Questions. Oracle base is the main or root directory of an oracle whereas ORACLE_HOME is located beneath base folder in which all oracle products reside. 1. 22. The language may even be exactly the same as that used in the application, which does not force the programmer to have two representations of his objects. List out the tools for administering the database. 44.    Nested table is a data type in Oracle which is used to support columns containing multi valued attributes. On November 12, Master Product Manager in Oracle Database, Dominic Giles, held a free live webinar for database administrators.This webinar explored the new features in 19c and the roadmap for upcoming Oracle Database releases. Data processing capacity can be added or removed on demand, and resources within a location can be dynamically provisioned. 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