Oracle Interview Questions: Are you preparing yourself for an oracle interview? Are you wondering where you will get sample questions for guiding you on what to encounter during an interview? Don’t because we have a solution. This article contains a couple of questions that are likely to be asked. Studying and understanding these questions will offer you the confidence you need to pass the interview.
Top Oracle Interview Questions for Experienced
Q1-What’s Oracle?
Ans: This is a company and also a database server that manages information in a structured way. Oracle enables clients to keep & retrieve related information in a multiuser environment. This allows several users to concurrently access similar information. All this can be accomplished while providing high performance.
Q2-How can one differentiate between Varchar2 and Varchar?
Ans: Varchar and Varchar2 are Oracle data varieties that are utilized to keep character strings of variable length. Pointing out major variances between these
Varchar can keep characters for about 2000 bytes, varchar2 can keep characters of about 4000 bytes. Varchar will hold space for characters that are defined on declaration even if each of them isn’t used. Varchar2 will release unused space.
Q3-What’s a SYSTEM-tablespace & when it’s created?
Ans: When a database is made in an Oracle database system, it auto-generates a SYSTEM-named SYSTEM-tablespace. SYSTEM tablespace has information dictionary tables for one’s entire database.
Q4-What’s BCP or bulk copy in Oracle?
Ans: BCP or Bulk copy in Oracle is utilized to export or import information from tables & views though it doesn’t copy the structure of similar information data. The major benefits of BCP are a quick mechanism for coping information & one can take the information backup easily.
Q5-Explain the relationship between database, data file, and tablespace?
Ans: Oracle-database possesses a single or extra logical storage unit known as tablespaces. Every tablespace at Oracle database contains one/more files known as datafiles. Tablespaces collectively keep the whole information of databases. Speaking about datafiles, these are the physical structure which confirms with operating-system as to which the Oracle-program is operating.
Conclusion
With this set of questions, I believe you will be in a position of answering them correctly when asked. Remember the way you present your answers in an interview matters a lot hence you need to stay calm and have confidence.
Originally published at https://www.htmlkick.com.
