JavaScript Mastery from Zero to Hero - Prepare for Coding Interviews - Solution - Group Objects in JavaScript

The video tutorial guides viewers through creating a function to filter employee data by department, specifically focusing on accountants. It begins with an introduction to the task, followed by setting up the function and handling initial data. The tutorial then delves into the implementation details, using the filter method and callback functions to achieve the desired outcome. Testing and verifying the function's logic are also covered, ensuring the correct filtering of employee data.

What is the primary objective of the function discussed in the video?

• To sort employees by their names

• To filter employees by their department

• To list all departments in the company

• To calculate the total number of employees

What are the two arguments taken by the 'grouping objects by values' function?

• Data and department

• Name and age

• Salary and position

• Location and experience

Which method is used to filter the employees by department?

• Map method

• Filter method

• Reduce method

• Sort method

What is the purpose of using a callback function in the filter method?

• To calculate the sum of elements

• To sort the data

• To test each element against a condition

• To find the maximum value

What is the initial step in testing the function?

• Creating a new array

• Logging the data

• Writing the function

• Sorting the data

What does the 'hasOwnProperty' method check for in an object?

• If the object is a function

• If the object is an array

• If a property exists in the object

• If the object is empty

What is the expected output when the function is correctly implemented?

• A list of all employees

• A list of all departments

• A filtered list of employees in the accounting department

• A count of all employees