What is the output of the following code? Python import csv with open('data.csv', 'r') as file: reader = csv.reader(file) headers = next(reader) print(headers)

Prints the first row (usually headers) from the CSV file

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Working with csv and excel files

This quiz checks what you know about handling CSV and Excel files in Python. These skills help you read, write and manage spreadsheet data easily perfect for data analysis and automation!

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Question 1

Which module is used in Python to read and write CSV files?

xlsxwriter
openpyxl
csv
pandas

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Question 2

What is the output of the following code?

Python

import csv

with open('data.csv', 'r') as file:
    reader = csv.reader(file)
    headers = next(reader)
    print(headers)

Prints the first row (usually headers) from the CSV file
Throws an error
Prints all rows
Reads file as a string

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Question 3

What class from the csv module reads each row into a dictionary?

csv.reader
csv.DictReader
csv.reader_dict
csv.ListReader

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Question 4

What is the correct way to write a list of dictionaries to a CSV file?

csv.writerows(dict_list)
csv.DictWriter(file).writerows(dict_list)
csv.DictReader(file).write(dict_list)
file.write(dict_list)

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Question 5

What is the role of the index=False parameter in to_csv() when using pandas?

It includes index values in the file
It prevents pandas from reading the file
It excludes row indices from being written
It sorts the DataFrame

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Question 6

What will be the output of the following openpyxl code if the cell A1 has value 'Python'?

Python

import openpyxl
wb = openpyxl.load_workbook("demo.xlsx")
sheet = wb.active
print(sheet.cell(row=1, column=1).value)

Prints the cell’s row number
Prints 'Python'
Returns None
Throws error

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Question 7

Which method in openpyxl is used to determine the number of rows in an Excel sheet?

len(sheet)
sheet.count()
sheet.max_row
sheet.get_rows()

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Question 8

What will this code output if there are 4 columns in the Excel sheet?

Python

print(sheet_obj.max_column)

3
4
5
Number of rows

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Question 9

How do you loop through the first column values in openpyxl?

Using range(1, sheet.max_column + 1)
Using sheet.columns[0]
Using range(1, sheet.max_row + 1) and setting column=1
Looping through sheet.rows directly

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Question 10

Which openpyxl method reads a specific row of values from the Excel sheet?

sheet.cell(row=i, column=j) in a column loop
sheet.read_row()
sheet.row_values()
sheet.get_row()

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