• What is database?
  • Why we use database?
  • How front end of web application interacts with back-end part of database?
  • What is primary key?
  • What is foreign key? How is it different from primary key?
  • What is a unique key and how is it different from primary key?
  • Why we need different tables to store data? Why data can not be saved in one table?
  • What is called normalization?
  • What are various data types available for columns in table?
  • What is a table in a database?
  • Can you enlist names of commercial databases available in market?
  • What is SQL?

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