Freelancer Subject Matter Expert

Freelancer Subject Matter Expert Interview Questions and Answers

Updated 26 Dec 2024

Q1. What is normalisation? Explain different types of normalisation.

Ans.

Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.

  • Normalization involves breaking down a database into smaller, more manageable tables and defining relationships between them.

  • There are different normal forms such as 1NF, 2NF, 3NF, BCNF, and 4NF, each with specific rules to ensure data integrity.

  • Normalization helps in reducing data redundancy, improving data consistency, and making the database more efficient.

  • For exam...read more

Q2. What is polymorphism?

Ans.

Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.

  • Polymorphism allows objects of different classes to be treated as objects of a common superclass.

  • There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

  • Example of compile-time polymorphism: function overloading in Java.

  • Example of runtime polymorphism: method overriding in Java.

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