Q: Question 3(i)What will be the output produced by following code fragment ?X = 10 X = X + 10 X = X - 5 print X X, Y = X - 2, 22 print X, Y

Output15 13 22 ExplanationX = 10 ⇒ assigns an initial value of 10 to X.X = X + 10 ⇒ X = 10 + 10 = 20. So value of X is now 20.X = X - 5 ⇒ X = 20 - 5 = 15. X is now 15.print (X) ⇒ print the value of X which is 15.X, Y = X - 2, 22 ⇒ X, Y = 13, 22.print (X, Y) ⇒ prints the value of X which is 13 and Y which is 22.

Q: Question 3(ii)What will be the output produced by following code fragment ?first = 2 second = 3 third = first * second print first, second, third first = first + second + third third = second * first print first, second, third

Output2 3 6 11 3 33 Explanationfirst = 2 ⇒ assigns an initial value of 2 to first.second = 3 ⇒ assigns an initial value of 3 to second.third = first * second ⇒ third = 2 * 3 = 6. So variable third is initialized with a value of 6.print first, second, third ⇒ prints the value of first, second, third as 2, 3 and 6 respectively.first = first + second + third ⇒ first = 2 + 3 + 6 = 11third = second * first ⇒ third = 3 * 11 = 33print first, second, third ⇒ prints the value of first, second, third as 11, 3 and 33 respectively.

Q: Question 3(iii)What will be the output produced by following code fragment ?side = int(raw_input('side')) #side given as 7 area = side * side print side, area

Output7 49 Explanationside = int(input('side') ) ⇒ This statements asks the user to enter the side. We enter 7 as the value of side.area = side * side ⇒ area = 7 * 7 = 49.print (side, area) ⇒ prints the value of side and area as 7 and 49 respectively.

Q: Question 4What are data types ? How are they important ?

Data types are used to identify the type of data a memory location can hold and the associated operations of handling it. The data that we deal with in our programs can be of many types like character, integer, real number, string, boolean, etc. Hence programming languages including Python provide ways and facilities to handle all these different types of data through data types.The data types define the capabilities to handle a specific type of data such as memory space it allocates to hold a certain type of data and the range of values supported for a given data type, etc.

Q: Question 5Write instructions to get the following result :Math is Fun so don't be resistant Just learn the rules, the rules are consistent And most important, you must be persistent ! Adding fractions, get common denominators. Multiply by missing factors to get the denominators. Add numerators only, NOT denominators. Do it in both interactive mode and script mode.

Interactive Mode>>> print("Math is Fun so don't be resistant") Math is Fun so don't be resistant >>> print("Just learn the rules, the rules are consistent") Just learn the rules, the rules are consistent >>> print("And most important, you must be persistent !") And most important, you must be persistent ! >>> print("") >>> print("Adding fractions, get common denominators.") Adding fractions, get common denominators. >>> print("Multiply by missing factors to get the denominators.") Multiply by missing factors to get the denominators. >>> print("Add numerators only, NOT denominators.") Add numerators only, NOT denominators. >>> Script ModeSolutionprint("Math is Fun so don't be resistant") print("Just learn the rules, the rules are consistent") print("And most important, you must be persistent !") print("") print("Adding fractions, get common denominators.") print("Multiply by missing factors to get the denominators.") print("Add numerators only, NOT denominators.")OutputMath is Fun so don't be resistant Just learn the rules, the rules are consistent And most important, you must be persistent ! Adding fractions, get common denominators. Multiply by missing factors to get the denominators. Add numerators only, NOT denominators.

Question 1

Question 1(a) What will be the output produced by following code fragments ?(i)a, b = 2, 3
c, b = a, c + 1 
print a, b, c(ii)x, y = 2, 6
x, y = y, x + 2
print x, y(b) What will the output produced if we interchange the first two lines of above two codes [given in part (a)], e.g., as shown below for code (i) ? Will it give any error ? Give reason(s).c, b = a, c + 1 
a, b = 2, 3
print a, b, c

Accepted Answer

(a)(i) This code fragment will generate the below error:NameError: name 'c' is not defined
Reason — The error is generated because in line 2, the variable c is not defined before being used.(ii)Output6 4
ExplanationStatementValue of XValue of YRemarkx, y = 2, 626Both x, y are initializedx, y = y, x + 264x = 6, y = 2 + 2 = 4print (x, y)646 (x), 4 (y) are printed(b) When we interchange the first two lines of above codes, we get the following outputs:(i) It will give the same error as before because even after interchanging first two lines variable C is still used before it is defined.(ii) Interchanging the first two lines will generate the below error:NameError: name 'y' is not defined
Reason — The error is generated because now in line 1, the variable y is not defined before being used.

Question 2

Question 2A bank account contains ₹10,000 and earns interest at the rate of 5 percent per year. The interest is added to the account. After one year the bank account contains the original sum of ₹10,000 plus the interest, which is 5% of ₹10,000, i.e., 10,000 * (5/100).So, the final account balance is 10000 + 10000 * (5/100) = 10000 * (1 + (5/100)) = 10000 * 1.05.(a) Write Python code script to calculate the balance in account as per this after one year.(b) Write Python code script to calculate the balance in account as per this after four years while showing balance after every year.(c) Write Python script that displays the number of takes for the account balance to be at least double the original balance.

Accepted Answer

(a) Python code script to calculate the balance in account after one year:p = 10000
r = 5
si = p * r  / 100
bal = p + si
print ("Balance = ₹", bal)OutputBalance = ₹ 10500.0
(b) Python code script to calculate the balance in account after four year while showing balance after every year:p = 10000
r = 5
si = p * r / 100
p = p + si
print ("Balance after 1st year = ₹", p) 
si = p * r / 100
p = p + si
print ("Balance after 2nd year = ₹", p) 
si = p * r / 100
p = p + si
print ("Balance after 3rd year = ₹", p) 
si = p * r / 100
p = p + si
print ("Balance after 4th year = ₹", p) OutputBalance after 1st year = ₹ 10500.0
Balance after 2nd year = ₹ 11025.0
Balance after 3rd year = ₹ 11576.25
Balance after 4th year = ₹ 12155.0625
(c) Python code script to display the number of takes for the account balance to be at least double the original balance:p = 10000
r = 5
t = p * 2
c = 0
while p < t:
    si = p * r  / 100
    p = p + si
    c = c + 1
print ("No. of takes =", c)OutputNo. of takes = 15

Question 3

Question 3(i)What will be the output produced by following code fragment ?X = 10
X = X + 10
X = X - 5
print X
X, Y = X - 2, 22
print X, Y

Accepted Answer

Output15
13 22
ExplanationX = 10 ⇒ assigns an initial value of 10 to X.X = X + 10 ⇒ X = 10 + 10 = 20. So value of X is now 20.X = X - 5 ⇒ X = 20 - 5 = 15. X is now 15.print (X) ⇒ print the value of X which is 15.X, Y = X - 2, 22 ⇒ X, Y = 13, 22.print (X, Y) ⇒ prints the value of X which is 13 and Y which is 22.

Question 4

Question 3(ii)What will be the output produced by following code fragment ?first = 2
second = 3
third = first * second
print first, second, third 
first = first + second + third 
third = second * first
print first, second, third

Accepted Answer

Output2 3 6
11 3 33
Explanationfirst = 2 ⇒ assigns an initial value of 2 to first.second = 3 ⇒ assigns an initial value of 3 to second.third = first * second ⇒ third = 2 * 3 = 6. So variable third is initialized with a value of 6.print first, second, third ⇒ prints the value of first, second, third as 2, 3 and 6 respectively.first = first + second + third ⇒ first = 2 + 3 + 6 = 11third = second * first ⇒ third = 3 * 11 = 33print first, second, third ⇒ prints the value of first, second, third as 11, 3 and 33 respectively.

Question 5

Question 3(iii)What will be the output produced by following code fragment ?side = int(raw_input('side'))	#side given as 7
area = side * side
print side, area

Accepted Answer

Output7 49
Explanationside = int(input('side') ) ⇒ This statements asks the user to enter the side. We enter 7 as the value of side.area = side * side ⇒ area = 7 * 7 = 49.print (side, area) ⇒ prints the value of side and area as 7 and 49 respectively.

Question 6

Question 4What are data types ? How are they important ?

Accepted Answer

Data types are used to identify the type of data a memory location can hold and the associated operations of handling it. The data that we deal with in our programs can be of many types like character, integer, real number, string, boolean, etc. Hence programming languages including Python provide ways and facilities to handle all these different types of data through data types.The data types define the capabilities to handle a specific type of data such as memory space it allocates to hold a certain type of data and the range of values supported for a given data type, etc.

Question 7

Question 5Write instructions to get the following result :Math is Fun so don't be resistant
Just learn the rules, the rules are consistent 
And most important, you must be persistent !

Adding fractions, get common denominators.
Multiply by missing factors to get the denominators. 
Add numerators only, NOT denominators.
Do it in both interactive mode and script mode.

Accepted Answer

Interactive Mode>>> print("Math is Fun so don't be resistant")
Math is Fun so don't be resistant
>>> print("Just learn the rules, the rules are consistent")
Just learn the rules, the rules are consistent
>>> print("And most important, you must be persistent !")
And most important, you must be persistent !
>>> print("")

>>> print("Adding fractions, get common denominators.")
Adding fractions, get common denominators.
>>> print("Multiply by missing factors to get the denominators.")
Multiply by missing factors to get the denominators.
>>> print("Add numerators only, NOT denominators.")
Add numerators only, NOT denominators.
>>>

Script ModeSolutionprint("Math is Fun so don't be resistant")
print("Just learn the rules, the rules are consistent")
print("And most important, you must be persistent !")
print("")
print("Adding fractions, get common denominators.")
print("Multiply by missing factors to get the denominators.")
print("Add numerators only, NOT denominators.")OutputMath is Fun so don't be resistant
Just learn the rules, the rules are consistent
And most important, you must be persistent !

Adding fractions, get common denominators.
Multiply by missing factors to get the denominators.
Add numerators only, NOT denominators.

Question 8

Question 6How many integer types are supported by Python ? Name them.

Accepted Answer

Two integer types are supported by Python. They are:Integers (signed)Booleans

Source: This question is from Introducing Python, Computer Applications &mdash; Class 9, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Introducing Python: Question, Integer, Supported, Python, Introducing Python, Computer Applications. These are fundamental topics in Computer Applications that students are expected to master as part of the CBSE Class 9 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Introducing PythonQ1: Question 1 (a) What will be the output produced by following code fragments ? (i) a , b = 2 , 3 c ,...
Q11: Question 9 Write a program that generates the following output : 5 10 9 Assign value 5 to a...
Q12: Question 10 Write a Python program that accepts radius of a circle and prints its area.
Q13: Question 11 Write Python program that accepts marks in 5 subjects and outputs average marks.
Q14: Question 12 Write a program to read a number n and print n 2 , n 3 and n 4 .
Practice more questions from Introducing Python &mdash; Computer Applications, Class 9 CBSE

Question 9

Question 7Differentiate between plain integer and long integer.

Accepted Answer

Plain integers generally use 32 bits (4 bytes) to store a value. Long integers, on the other hand, don't have any size limitation for storing the value, they can grow arbitrarily large subject to available memory.

Question 10

Question 8Write instructions in interactive mode for the following :(i) to display sum of 8, 9.0, 2 * 3(ii) to print sum of 8, 9.0, 2 * 3

Accepted Answer

(i)>>> 8 + 9.0 + 2 * 3
23.0
(ii)>>> print(8 + 9.0 + 2 * 3)
23.0

Source: This question is from Introducing Python, Computer Applications &mdash; Class 9, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Introducing Python: Question, Instructions, Interactive, Mode, Display, Sum. These are fundamental topics in Computer Applications that students are expected to master as part of the CBSE Class 9 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Introducing PythonQ1: Question 1 (a) What will be the output produced by following code fragments ? (i) a , b = 2 , 3 c ,...
Q11: Question 9 Write a program that generates the following output : 5 10 9 Assign value 5 to a...
Q12: Question 10 Write a Python program that accepts radius of a circle and prints its area.
Q13: Question 11 Write Python program that accepts marks in 5 subjects and outputs average marks.
Q14: Question 12 Write a program to read a number n and print n 2 , n 3 and n 4 .
Practice more questions from Introducing Python &mdash; Computer Applications, Class 9 CBSE

Question 11

Question 9Write a program that generates the following output :5
10
9
Assign value 5 to a variable using assignment operator (=). Multiply it with 2 to generate 10 and subtract 1 to generate 9.

Accepted Answer

Solutiona = 5
print(a)
a = a * 2
print(a)
a = a - 1
print(a)Output5
10
9

Question 12

Question 10Write a Python program that accepts radius of a circle and prints its area.

Accepted Answer

Solutionr = float(input("Enter radius of circle: "))
a = 3.14159 * r * r
print("Area of circle =", a)OutputEnter radius of circle: 7.5
Area of circle = 176.7144375

Question 13

Question 11Write Python program that accepts marks in 5 subjects and outputs average marks.

Accepted Answer

Solutionm1 = int(input("Enter first subject marks: "))
m2 = int(input("Enter second subject marks: "))
m3 = int(input("Enter third subject marks: "))
m4 = int(input("Enter fourth subject marks: "))
m5 = int(input("Enter fifth subject marks: "))
avg = (m1 + m2+ m3+ m4 + m5) / 5;
print("Average Marks =", avg)OutputEnter first subject marks: 65
Enter second subject marks: 78
Enter third subject marks: 79
Enter fourth subject marks: 80
Enter fifth subject marks: 85
Average Marks = 77.4

Question 14

Question 12Write a program to read a number n and print n2, n3 and n4.

Accepted Answer

Solutionn = int(input("Enter n: "))
n2, n3, n4 = n ** 2, n ** 3, n ** 4
print("n =", n)
print("n^2 =", n2)
print("n^3 =", n3)
print("n^4 =", n4)OutputEnter n: 2
n = 2
n^2 = 4
n^3 = 8
n^4 = 16

Question 15

Question 13Write a program to compute simple interest and compound interest.

Accepted Answer

Solutionp = float(input("Enter principal: "))
r = float(input("Enter rate: "))
t = int(input("Enter time: "))
si = (p * r * t) / 100
ci = p * ((1 + (r / 100 ))** t) - p
print("Simple interest = ", si)
print("Compound interest = ", ci)OutputEnter principal: 15217.75
Enter rate: 9.2
Enter time: 3
Simple interest =  4200.098999999999
Compound interest =  4598.357987312007

Question 16

Question 14Write a program to read details like name, class, age of a student and then print the details firstly in same line and then in separate lines.Make sure to have two blank lines in these two different types of prints.

Accepted Answer

Solutionn = input("Enter name of student: ")
c = int(input("Enter class of student: "))
a = int(input("Enter age of student: "))
print("Name:", n, "Class:", c, "Age:", a)
print()
print()
print("Name:", n)
print("Class:", c)
print("Age:", a)OutputEnter name of student: Kavya
Enter class of student: 11
Enter age of student: 17
Name: Kavya Class: 11 Age: 17

Name: Kavya
Class: 11
Age: 17

Introducing Python

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