Protera Interview Questions and Answers

SQL inner join combines rows from two or more tables based on a related column between them.

• Inner join retrieves rows from both tables that have matching values in the specified column

• Syntax: SELECT column_name(s) FROM table1 INNER JOIN table2 ON table1.column_name = table2.column_name

• Example: SELECT Orders.OrderID, Customers.CustomerName FROM Orders INNER JOIN Customers ON Orders.CustomerID = Customers.CustomerID

SQL queries for select, create, and delete statements

• SELECT statement is used to retrieve data from a database table

• CREATE statement is used to create a new table in the database

• DELETE statement is used to remove rows from a table based on a condition

Program to print star pattern in a specific shape

• Use nested loops to control the number of rows and columns

• Use if-else statements to determine when to print a star or a space

• Experiment with different loop conditions to create various patterns

Oops pillars refer to the four main concepts of object-oriented programming: Inheritance, Encapsulation, Abstraction, and Polymorphism.

• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation involves bundling data and methods that operate on the data into a single unit.

• Abstraction focuses on hiding the complex implementation details and showing only the necessary features of an object.

• Polymorphism allows objects to be treated as instance...read more

Function overloading is the ability to define multiple functions with the same name but different parameters in a class.

• Allows multiple functions with the same name but different parameters to be defined in a class

• Helps improve code readability and maintainability

• Example: void print(int num) and void print(string text) can both be defined in a class

Inheritance is a concept in object-oriented programming where a class inherits attributes and methods from another class.

• Child class inherits properties and behaviors from a parent class

• Allows for code reusability and promotes a hierarchical relationship between classes

• Example: Animal class can be a parent class with properties like name and methods like eat, and Dog class can inherit from Animal class with additional properties like breed