Core Java Programming Course- Reading MS Excel Data into a 2D Array

The video tutorial explains how to handle mixed data types using a 2D array of objects. It covers the creation and initialization of the array, populating it with data from an Excel file, and creating a method to read and return this data. The tutorial concludes with testing the data retrieval process to ensure accuracy.

Why is a 2D array of objects preferred over arrays of strings or integers for handling Excel data?

• Because it is easier to code.

• Because it can store mixed data types.

• Because it can store only integer values.

• Because it can store only string values.

What is the primary reason for using a 2D array instead of a single-dimensional array?

• A 2D array can hold a table of data.

• A 2D array uses less memory.

• A 2D array is easier to initialize.

• A 2D array is faster to process.

How do you determine the number of rows in a 2D array when reading from an Excel file?

• By counting the number of columns.

• By subtracting the start row from the end row.

• By adding one to the difference between the end and start rows.

• By dividing the total cells by the number of columns.

What is the purpose of reinitializing the 2D array inside the try block?

• To reset the array to its default state.

• To ensure the array has the correct dimensions.

• To clear any existing data in the array.

• To improve the performance of the program.

How is the data type of each column in the 2D array determined?

• By the data type of the last cell in each column.

• By a predefined schema in the program.

• By the data type of the first cell in each column.

• By the user input during initialization.

What is the role of the 'readExcelData' method in the program?

• To delete data from the Excel file.

• To sort the data in the Excel file.

• To read data from an Excel file into a 2D array.

• To write data to an Excel file.

What is the expected output when accessing the first element of the 2D array?

• The first date value.

• The first integer value.

• The first string value.

• The first boolean value.