Completed

CSV Files - csv module

Class 12 · Computer Science Sun, 11 Oct 2026 9:00 PM 60s / question 15 questions · 15 marks

Questions From This Challenge

Q1mcq1 mark

Which module provides functions to read and write CSV (Comma Separated Values) files in Python?

pickle

csv ✓

json

Q2mcq1 mark

Which function creates a writer object that can be used to write rows to a CSV file?

csv.reader()

csv.writer() ✓

csv.DictWriter() is the only option

csv.load()

Q3mcq1 mark

Which method of a csv writer object writes a single row (given as a list) to the CSV file?

writerow() ✓

writerows()

writeline()

write()

Q4mcq1 mark

Which method of a csv writer object writes multiple rows at once, given as a list of lists?

writerow()

writerows() ✓

writemany()

append()

Q5mcq1 mark

In what way should a CSV file typically be opened for writing with the csv module to avoid extra blank lines appearing between rows?

open(filename, "w", newline="") ✓

open(filename, "wb")

open(filename, "a+")

open(filename, "rt")

Q6mcq1 mark

What does csv.reader(f) return when iterated over?

Each row as a single comma-separated string

Each row as a list of string values ✓

Each row as a dictionary

The entire file content as one string

Q7mcq1 mark

Which of these is a valid way to write the header row ["Name", "Age"] to an open file object f using the csv module?

writer = csv.writer(f); writer.writerow(["Name", "Age"]) ✓

csv.write(f, ["Name", "Age"])

f.writerow(["Name", "Age"])

writer = csv.writer(f); writer.write(["Name", "Age"])

Q8output1 mark

What is the output?

import csv
with open("c1.csv", "w", newline="") as f:
    writer = csv.writer(f)
    writer.writerow(["Name", "Marks"])
    writer.writerow(["Ravi", 88])

with open("c1.csv", "r", newline="") as f:
    reader = csv.reader(f)
    for row in reader:
        print(row)

Correct output:

['Name', 'Marks']
['Ravi', '88']

Q9output1 mark

What is the output?

import csv
data = [["Amit", 72], ["Sneha", 95], ["Kabir", 60]]
with open("c2.csv", "w", newline="") as f:
    writer = csv.writer(f)
    writer.writerows(data)

with open("c2.csv", "r", newline="") as f:
    reader = csv.reader(f)
    count = 0
    for row in reader:
        count = count + 1
print(count)

Correct output: 3

Q10output1 mark

What is the output?

import csv
with open("c3.csv", "w", newline="") as f:
    writer = csv.writer(f)
    writer.writerow(["Item", "Price"])
    writer.writerow(["Pen", 10])
    writer.writerow(["Book", 50])

with open("c3.csv", "r", newline="") as f:
    reader = csv.reader(f)
    next(reader)
    total = 0
    for row in reader:
        total = total + int(row[1])
print(total)

Correct output: 60

Q11output1 mark

What is the output?

import csv

def addRecord(filename, row):
    with open(filename, "a", newline="") as f:
        writer = csv.writer(f)
        writer.writerow(row)

with open("c4.csv", "w", newline="") as f:
    writer = csv.writer(f)
    writer.writerow(["Roll", "Name"])

addRecord("c4.csv", [1, "Neha"])
addRecord("c4.csv", [2, "Omar"])

with open("c4.csv", "r", newline="") as f:
    reader = csv.reader(f)
    for row in reader:
        print(row)

Correct output:

['Roll', 'Name']
['1', 'Neha']
['2', 'Omar']

Q12output1 mark

What is the output?

import csv
with open("c5.csv", "w", newline="") as f:
    writer = csv.writer(f, delimiter="|")
    writer.writerow(["A", "B", "C"])

with open("c5.csv", "r", newline="") as f:
    content = f.read()
print(content.strip())

Correct output: A|B|C

Q13output1 mark

What is the output?

import csv
with open("c6.csv", "w", newline="") as f:
    writer = csv.writer(f)
    writer.writerows([["Rahul", "90"], ["Priya", "85"], ["Sara", "78"]])

with open("c6.csv", "r", newline="") as f:
    reader = csv.reader(f)
    rows = list(reader)
print(rows[1][0])

Correct output: Priya

Q14output1 mark

What is the output?

import csv
try:
    with open("missing_data.csv", "r", newline="") as f:
        reader = csv.reader(f)
        for row in reader:
            print(row)
except FileNotFoundError:
    print("CSV file missing")

Correct output: CSV file missing

Q15output1 mark

What is the output?

import csv
names = ["Ira", "Vikram", "Tanya"]
scores = [67, 89, 45]
with open("c8.csv", "w", newline="") as f:
    writer = csv.writer(f)
    writer.writerow(["Name", "Score"])
    i = 0
    while i < len(names):
        writer.writerow([names[i], scores[i]])
        i = i + 1

with open("c8.csv", "r", newline="") as f:
    reader = csv.reader(f)
    next(reader)
    for row in reader:
        if int(row[1]) >= 60:
            print(row[0])

Correct output:

Ira
Vikram

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