NCERT solutions for Computer Science [English] Class 12 chapter 1 - Exception Handling in Python [Latest edition]

“Every syntax error is an exception but every exception cannot be a syntax error.” Justify the statement.

When are the following built-in exceptions raised? Give examples to support your answer.

ImportError

When are the following built-in exceptions raised? Give examples to support your answer.

IOError

When are the following built-in exceptions raised? Give examples to support your answer.

NameError

When are the following built-in exceptions raised? Give examples to support your answer.

ZeroDivisionError

What is the use of a raise statement? Write a code to accept two numbers and display the quotient. Appropriate exception should be raised if the user enters the second number (denominator) as zero (0).

Use assert statement in Question No. 3 to test the division expression in the program.

Define the following:

Exception Handling

Define the following:

Throwing an exception

Define the following:

Catching an exception

Explain catching exceptions using try and except block.

Consider the code given below and fill in the blanks.

print (" Learning Exceptions…")
try:
    num1 = int(input ("Enter the first number")
    num2 = int(input("Enter the second number"))
    quotient=(num1/num2)
    print ("Both the numbers entered were correct")
except ________:           # to enter only integers
    print (" Please enter only numbers")
except __________:       # Denominator should not be zero
    print(" Number 2 should not be zero")
else:
    print(" Great .. you are a good programmer")
___________________ :       # to be executed at the end
print(" JOB OVER… GO GET SOME REST")

You have learnt how to use math module in Class XI. Write a code where you use the wrong number of arguments for a method (say sqrt() or pow()). Use the exception handling process to catch the ValueError exception.

What is the use of finally clause? Use finally clause in the problem given below.

print (" Learning Exceptions…")
try:
    num1 = int(input ("Enter the first number"))
    num2 = int(input("Enter the second number"))
    quotient=(num1/num2)
    print ("Both the numbers entered were correct")
except ________:           # to enter only integers
    print (" Please enter only numbers")
except __________:       # Denominator should not be zero
    print(" Number 2 should not be zero")
else:
    print(" Great .. you are a good programmer")
___________________ :       # to be executed at the end
print(" JOB OVER… GO GET SOME REST")