Flow Link Systems Interview Questions and Answers

There are 5 normalization forms in database design.

• 1. First Normal Form (1NF) - Eliminate repeating groups and ensure each field contains only atomic values.

• 2. Second Normal Form (2NF) - Meet 1NF requirements and all non-key attributes are fully functional dependent on the primary key.

• 3. Third Normal Form (3NF) - Meet 2NF requirements and eliminate transitive dependencies.

• 4. Boyce-Codd Normal Form (BCNF) - Meet 3NF requirements and every determinant is a candidate key.

• 5. Four...read more

The SQL command to interpret a table is SELECT * FROM table_name;

• Use the SELECT statement to retrieve data from a table

• The * symbol selects all columns from the table

• Replace 'table_name' with the actual name of the table

Abstract class is used as a blueprint for other classes to inherit from, providing common methods and properties.

• Provides a template for other classes to follow

• Can contain abstract methods that must be implemented by child classes

• Cannot be instantiated on its own, only used for inheritance

• Allows for code reusability and organization

• Example: Shape class with abstract method calculateArea, Circle and Square classes inheriting from Shape

Java is a popular programming language used for developing applications, websites, and games.

• Java is used for developing Android apps

• It is used for creating web applications and server-side technologies

• Java is used for developing desktop applications and games

• It is also used for creating enterprise-level applications and software

• Java is known for its platform independence and security features

Interfaces in computer engineering are used to define a contract for classes to implement, allowing for polymorphism and loose coupling.

• Interfaces define a set of methods that a class must implement.

• They allow for polymorphism, where objects of different classes can be treated as objects of the same interface.

• Interfaces promote loose coupling between classes, making code more modular and easier to maintain.

• Examples of interfaces in programming languages include Java interface...read more

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

• Normalization helps in reducing data redundancy by organizing data into multiple tables.

• It improves data integrity by ensuring that each piece of data is stored in only one place.

• There are 3 main forms of normalization: 1NF, 2NF, and 3NF.