yellow.ai Key Account Manager Interview Questions and Answers

The final class and method are used to prevent inheritance and method overriding respectively.

• Final class: A final class cannot be subclassed. It is often used for utility classes or classes that should not be extended.

• Final method: A final method cannot be overridden by subclasses. It is used to prevent modification of a method's behavior in subclasses.

Find duplicate numbers in an array of strings.

• Iterate through the array and keep track of the count of each number using a hash map.

• If the count of a number is greater than 1, it is a duplicate.

• Return the list of duplicate numbers.

The output will be the literal string of the variable, without any variable interpolation.

• When a variable is echoed in single quotes, it is treated as a literal string.

• No variable interpolation or special characters are interpreted.

• The output will include the variable name itself, not its value.

Object-oriented programming (OOP) is a programming paradigm that uses objects to represent and manipulate data.

• OOP is based on the concept of classes and objects.

• It focuses on encapsulation, inheritance, and polymorphism.

• Encapsulation hides the internal details of an object and provides a public interface.

• Inheritance allows classes to inherit properties and methods from other classes.

• Polymorphism allows objects of diff...read more

The HAVING clause is used in MySQL to filter the results of a GROUP BY query based on a condition.

• The HAVING clause is similar to the WHERE clause, but it operates on grouped rows rather than individual rows.

• It is used in conjunction with the GROUP BY clause.

• The HAVING clause is used to filter the results of a GROUP BY query based on a condition that applies to the grouped rows.

• It is typically used to specify condition...read more