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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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