About interview Questions Collection(Basic,Intermediate and Advanced) in MySQL

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Basic MySQL Interview Questions

1.What is Mysql?

  • Database management system for web servers

2.What are some of the advantages of using MySQL?

  • Flexibility
  • Power
  • Enterprise-Level SQL Feature
  • Full-Text Indexing and Searching
  • Query Caching
  • Replication
  • Configuration and Security

3.What do you mean by `Database`?

  • A structured collection of data stored
  • Organized to be quickly searched
  • Information can be rapidly retrieved

4.What does SQL in MySQL stand for ?

  • Structured Query Language

5.What does a MySQL database contain?

  • one or more tables
  • records and rows
  • columns and fields

6.How can you interact with MySQL?

  • using a command line
  • via a web interface
  • through a programming language

7.What are MySQL Database Queries?

  • a specific request or a question

8.What are some of the common MySQL commands?

  • Alter
  • Backup
  • \c (to cancel input)
  • Create
  • Delete
  • Describe
  • Drop
  • Exit
  • Grant
  • Insert
  • Lock
  • Quit
  • Rename
  • Show
  • Source
  • Status
  • Truncate
  • Unlock
  • Update
  • Use

9.How do you create a database in MySQL?

   Create Database database_name;

10.How do you remove a column from a database?

  • Alter Table books drop pages;

11.How do you view a database in MySQL ?

  • Show databases;

12.What are the Numeric Data Type in MySQL?

  • TINYINT
  • SMALLINT
  • MEDIUMINT
  • INT
  • BIGINT
  • DECIMAL
  • FLOAT
  • DOUBLE
  • BIT

13.What are the String Data Types in MySQL?

  • CHAR
  • VARCHAR
  • BINARY
  • VARBINARY
  • TINYBLOB
  • BLOB
  • MEDIUMLOB
  • LONGBLOB
  • TINYTEXT
  • TEXT
  • MEDIUMTEXT
  • LONGTEXT
  • ENUM
  • SET
  • NULL

14.What are the Temporal Data Type in MySQL?

  • DATE
  • TIME
  • DATETIME
  • TIMESTAMP
  • YEAR

15.What is BLOB in MySQL?

  • BLOB is an acronym that stand for a binary large object.
  • It is used to hold a variable amount of data
  • TINYBLOB
  • BLOB
  • MEDIUMBLOB
  • LONGBLOB
  • A BLOB can hold a very large amount of data.(document,images,videos)

16. How to add users in MySQL?

  • CREATE USER 'testuser' IDENTIFIED BY 'sample password';

Intermediate MySQL Interview Questions

17. What are MySQL "Views"?

  • a view consists of a set of rows that is returned
  • virtual table
  • making the query available via an alias
  • Advantages of views : Simplicity Security Maintainability

18.What are MySQL Trigger?

  • a task that executes in response to database event that involves inserting,modifying,or deleting table data
  •  Trigger purpose including Audit Trails and Validation and Referential Integrity enforcement

19.How many Triggers are possible in MySQL?

Six triggers allowed to use in the MySQL database:

  • Before Insert
  • After Insert
  • Before Update
  • After Update
  • Before Delete
  • After Delete

20.What is the MySQL server?

The server mysqld,is the hub of a MySQL installation,It performs all manipulation of databases and tables.

21.What are the MySQL clients and utilities?

  • mysql (an interactive program enable client to server,execute bash shell )
  • mysqladmin (An administrate program for performing tasks: shut down the server,checking its configuration,monitoring its status)
  • mysqldump (backing up your database or copying database)
  • mysqlcheck and myisamchk (perform table checking,analysis and optimization)

22.What are the types of relationships used in MySQL?

  • One-to-One
  • One-to-Many
  • Many-to-Many

Advanced MySQL Interview Questions

23.Can you explain the logical architecture of MySQL?

  • The top layer: contains the services most network-based client/server tools
  • The second layer contains much of MySQL's brains
  • The third layer contains the storage engines that are responsible for storing and retriveing the data stored in MySQL.

24.What is Scaling in MySQL?

  • Quantity of data
  • Number of users
  • User activity
  • Size of related datasets

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