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MariaDB Interview Questions

                      Top 20 MariaDB Interview Questions


1) What do you understand by the MariaDB?

MariaDB is developed by MySQL developers. It is a popular public source under GNU GPL which is related to database management technology. It also provides a similar trait to MySQL.IT is the modification of MySQL. Maria DB is efficient in transferring the data into the applications. The main reason for being used MariaDB is because it is scalable, speedy, and easy to hand. Moreover, it provides a lot of services like the plugin, storage, and much more.
  
2) Mention some characteristics of MariaDB?
It has a lot of unique features that make it more useful and wonderful to work over it than MySQL. Some features are: -
MariaDB is licensed under GPL, LGPL, or BSD.
It is authorized under the BSD, LGPL, GPL MariaDB.
It is suitable to work with the data sources like RDBMS.
It provides a great number of storage engines.
It provides some great extraordinary performance engines.
It has a good paradigm inquiring language.
It supports a lot of operating systems and can work on it.
It supports a large number of programming languages.
It even supports the most used web development language that is PHP.
Galera cluster technology is also supported by MariaDB.
As it is the modification of MySQL, it supports many functions that are absent in MySQL.
It contributes commands and many operations.
It removes some unnecessary features present in MySQL.

3) Which command is used to delete the table in MariaDB’s database?
The command DROP TABLE is used to delete the table in MariaDB’s database. It is needed to make sure if you really want to delete the table because it permanently deletes the table and it can’t be recovered. Triggers are also removed with the table definitions and table data so it needs to do when you are sure.

4) Which command is used to create the table in MariaDB’s database?
It is done step after step. These steps are: -
First of all, it needs to construct a database.
When it is done, select the database.
After that create a table by commanding CREATE TABLE statement.
If you want to create or delete the table you must have the privilege for it

5) What is the main objective of MariaDB?
The main purpose of MariaDB is to supply a better, firm, and community-developed and also that is compatible with MySQL. It is always free DBMS on the basic level.

6) Why it is the name MariaDB?
The company says that MariaDB is a modification of MySQL. MySQL is linked to Oracle because the trademark is suggested by Oracle. Thus, the company decided to continue this trademark. As MySQL name has come from Monty's first daughter "My", so, for maintaining the continuity MariaDB has come from elder daughter Maria.

7) Can a normal being contribute to MariaDB?
Yes, if any person is willing to participate in contributing the MariaDB they can do. They just have to fill a form that will help the person to gather around his/her team to work over projects. These projects help MariaDB to be a better future. The projects are like writing or translations of KB essay type.

8) Who is the founder of MariaDB?
MariaDB has founded by Michael “Monty” Widenius, the founder of MYSQL. The main focus of the MariaDB foundation to keep the quality of the MariaDB project high.

9) Why MariaDB is a community open project?
The main reason for its community open source because this company is run by a non-profit organization.
All the code in MariaDB is provided in open source. No code is closed expected to release by this foundation
There are a lot of companies and members who meet the criteria of MariaDB. The companies and the individual who meet its criteria are also eligible to commit rights to its codebase.
There are a few limited restrictions to those people who contribute articles otherwise everyone is free from restriction.
It just handles the brand label and the rest of the rights are given to the others.

10) What do you suggest by MariaDB Galera Cluster?
MariaDB Galera Cluster is also referred to as a multi-master cluster of MariaDB. MariaDB Galera Cluster is accessible only on Linux and also supports either XtraDB or InnoDB storage engines.
MariaDB Galera Cluster 10.1 is incorporated by default but in MariaDB Galera Cluster 10.0 and MariaDB Galera Cluster 5.5, it has to download individually.

11) What do you understand by 'The Max Storage Capacity of Version 5.5 MariaDB'?
Habitually the internal limits of MariaDB are enough for the size and space limits goals of storage and operating system as its InnoDB/XtraDB can reach the size up to 64 Terabytes. Although the person may have a great number of tables per database and so many numbers of databases per server it is enough.

12) what are the steps to change Innodb_page_size?
It does need to do anything with a new install. There are steps to follow if you want to change the size. These are:
Firstly, go through your data and export it by moving it or by deleting the database and folders.
When it is done, fixed innobd_page_size to any of the 4k or 8k
After that, restart the MariaDB.
When it is on, there appears a new XtraDB but having a smaller page size.
Now you are free to introduce your data and do what you want to do.
So, in this whole procedure, you don't need to do anything with the new installment.

13) List some tools of Gui/workbench For MariaDB Aria?
There are some important tools of Gui/workbench for MariaDB Aria. These are
Webyog/SQLyog
HeidiSQL
dbForge Studio for MySQL
MySQL Workbench.
In spite of above all, the company is still trying to add some more support functions.

14) What do you mean by JOIN in MariaDB?
It is also known as inner join. You can select it by the SELECT statement. JOIN is used to recover the data from tables that should be two in number or can be more than it.

15) How many types of JOIN are there in MariaDB?
There are basically two types of JOIN in MariaDB.
1. Inner join: Inner join is a type of join works only when the conditions are satisfied. It is used to recover the rows from two or more tables.
2. Outer join: It has further two types: -
I)LEFT JOIN: In the same way of INNER JOIN, it also works on those rows in a table where the particular conditions are satisfied. LEFT OUTER JOIN is basically useful at the time of recovering those rows which have to be carried from the left-hand table but in ON condition. It is also referred as LEFT OUTER JOIN.
2)RIGHT JOIN: It also works on those rows in a table where the particular conditions are satisfied. RIGHT OUTER JOIN is basically useful at the time of recovering those rows which have to be carried from the right-hand table but in ON condition. It is also referred to as RIGHT OUTER JOIN.

16) Which Version of MariaDB Is preferable to Work on Windows 7 X32?
Although there are many versions of MariaDB that can be useful to work on window 7X32 but MariaDB 5.2.5 is preferable for it.

17) Which Version of MariaDB Is preferable to Work on Windows 7 X64?
Although 5.2.5 is also efficient for windows 7 X64. But all these versions are like to prefer 5.2.6 or latest more versions.

18) What do you understand by the function in the MariaDB?
MariaDB function is works as a stored program in which a particular type of parameters is allowed to pass through them which in exchange, they return a value.

19) What do you mean by procedure or stored procedure in MariaDB database?
Procedures are also a type of class of function in the MariaDB database. It comes into use when the user needs to perform a particular task a lot of times.
MariaDB procedure also works as a stored program in which a particular type of parameters is allowed to pass through them but in exchange, they do not return any value.

20) How many types of procedures are there in the MariaDB database?
There are 3 types of procedures in the MariaDB database on the basis of references and parameters overwritten. These are
IN procedure- In this type of procedure, the values of a parameter can be overwritten and referenced by the procedure.
OUT procedure- In this type of procedure, the values of parameter can be overwritten by the procedure but it can’t be referenced by a procedure.
IN OUT- In this type of procedure, the values of a parameter can be referenced by the procedure but it can’t be overwritten by a procedure.


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