NCERT solutions for Computer Science [English] Class 12 chapter 2 - File Handling in Python [Latest edition]

Differentiate between text file and binary file.

Differentiate between readline() and readlines().

Differentiate between write() and writelines().

Write the use and syntax for the following method:

open()

Write the use and syntax for the following method:

read()

Write the use and syntax for the following method:

seek()

Write the use and syntax for the following method:

dump()

Write the file mode that will be used for opening the following file. Also, write the Python statement to open the following file:

a text file “example.txt” in both read and write mode

Write the file mode that will be used for opening the following file. Also, write the Python statement to open the following file:

a binary file “bfile.dat” in write mode.

Write the file mode that will be used for opening the following file. Also, write the Python statement to open the following file:

a text file “try.txt” in append and read mode.

Write the file mode that will be used for opening the following file. Also, write the Python statement to open the following file:

a binary file “btry.dat” in read only mode.

Why is it advised to close a file after we are done with the read and write operations? What will happen if we do not close it? Will some error message be flashed?

What is the difference between the following set of statements (a) and (b):

1. P = open(“practice.txt”,”r”)
   P.read(10)
2. with open(“practice.txt”, “r”) as
   P: x = P.read()

Write a command(s) to write the following lines to the text file named hello.txt. Assume that the file is opened in append mode.

“ Welcome my class”
“It is a fun place”
“You will learn and play”

Write a Python program to open the file hello.txt used below in read mode to display its contents. What will be the difference if the file was opened in write mode instead of append mode?

“ Welcome my class”
“It is a fun place”
“You will learn and play”

Write a program to accept string/sentences from the user till the user enters “END” to. Save the data in a text file and then display only those sentences which begin with an uppercase alphabet.

Define pickling in Python. Explain serialization and deserialization of Python object.

Write a program to enter the following records in a binary file:

Number of records to be entered should be accepted from the user. Read the file to display the records in the following format:

Item No:
Item Name :
Quantity:
Price per item:
Amount: (to be calculated as Price * Qty)