Q: Question 16Which of the following four code fragments will yield following output?Eina Mina Dika Select all of the function calls that result in this outputprint('''Eina\nMina\nDika''')print('''EinaMinaDika''')print('Eina\nMina\nDika')print('EinaMinaDika')

print('Eina\nMina\nDika')Reason —print('''Eina\nMina\nDika''') — It is a multiline string and by adding \n extra line will be added.print('''EinaMinaDika''') — There is no new line character.print('Eina\nMina\nDika') — It adds new line by \n new line character.print('EinaMinaDika') — It creates an error because it is a multiline string with no triple quotes.

Q: Question 27Write the output of the following Python code:for i in range(2,7,2): print(i*'$')

Output$$ $$$$ $$$$$$Explanationrange(2,7,2) returns [2, 4, 6] as it defines a range of 2 to 6 with a step of 2. The loop iterates as below:For i = 2, it prints $$.For i = 4, it prints $$$$.For i = 6, it prints $$$$$$.

Question 1

Question 16Which of the following four code fragments will yield following output?Eina 
Mina 
Dika
Select all of the function calls that result in this outputprint('''Eina
Mina
Dika''')print('''EinaMinaDika''')print('Eina
Mina
Dika')print('EinaMinaDika')

Accepted Answer

print('Eina
Mina
Dika')Reason —print('''Eina
Mina
Dika''') — It is a multiline string and by adding 
 extra line will be added.print('''EinaMinaDika''') — There is no new line character.print('Eina
Mina
Dika') — It adds new line by 
 new line character.print('EinaMinaDika') — It creates an error because it is a multiline string with no triple quotes.

Question 2

Question 2How are keywords different from identifiers?

Accepted Answer

Keywords are reserved words carrying special meaning and purpose to the language compiler/interpreter. For example, if, elif, etc. are keywords. Identifiers are user defined names for different parts of the program like variables, objects, classes, functions, etc. Identifiers are not reserved. They can have letters, digits and underscore. They must begin with either a letter or underscore. For example, _chk, chess, trail, etc.

Question 3

Question 17Describe the concepts of block and body. What is indentation and how is it related to block and body?

Accepted Answer

A block in Python, represents a group of statements executed as a single unit. Python uses indentation to create blocks of code. Statements at same indentation level are part of same block/suite and constitute the body of the block.

Question 4

Question 20What are immutable and mutable types? List immutable and mutable types of Python.

Accepted Answer

Mutable types are those whose values can be changed in place whereas Immutable types are those that can never change their value in place.Mutable types in Python are:ListsDictionariesSetsImmutable types in Python are:IntegersFloating-Point numbersBooleansStringsTuples

Question 5

Question 21What is the difference between implicit type conversion and explicit type conversion?

Accepted Answer

Implicit Type ConversionExplicit Type ConversionAn implicit type conversion is automatically performed by the compiler when differing data types are intermixed in an expression.An explicit type conversion is user-defined conversion that forces an expression to be of specific type.An implicit type conversion is performed without programmer's intervention.An explicit type conversion is specified explicitly by the programmer.Example:a, b = 5, 25.5c = a + bExample:a, b = 5, 25.5c = int(a + b)

Question 6

Question 22An immutable data type is one that cannot change after being created. Give three reasons to use immutable data.

Accepted Answer

Three reasons to use immutable data types are:Immutable data types increase the efficiency of the program as they are quicker to access than mutable data types.Immutable data types helps in efficient use of memory storage as different variables containing the same value can point to the same memory location. Immutability guarantees that contents of the memory location will not change.Immutable data types are thread-safe so they make it easier to parallelize the program through multi-threading.

Question 7

Question 23What is entry controlled loop? Which loop is entry controlled loop in Python?

Accepted Answer

An entry-controlled loop checks the condition at the time of entry. Only if the condition is true, the program control enters the body of the loop. In Python, for and while loops are entry-controlled loops.

Question 8

Question 24Explain the use of the pass statement. Illustrate it with an example.

Accepted Answer

The pass statement of Python is a do nothing statement i.e. empty statement or null operation statement. It is useful in scenarios where syntax of the language requires the presence of a statement but the logic of the program does not. For example,for i in range(10):
    if i == 2:
        pass
    else:
        print("i =", i)

Question 9

Question 25Rewrite the adjacent code in python after removing all syntax error(s). Underline each correction done in the code.30 = To
for K in range(0,To)
IF k%4 == 0:
    print(K * 4)
Else:
    print(K+3).

Accepted Answer

The corrected code is shown below:To = 30 # Correction 1
for K in range(0,To): # Correction 2
    if K % 4 == 0: # Correction 3
        print(K * 4)
    else: # Correction 4
        print(K+3) # Correction 5ExplanationCorrection 1 — Variable should be on left side and literals should be on right side.Correction 2 — Semi-colon was missing in the for loop syntax.Correction 3 — if statement should be in lower case.Correction 4 — else statement should be in lower case.Correction 5 — Full stop should not be there at the end of print function.

Question 10

Question 26Below are seven segments of code, each with a part coloured. Indicate the data type of each coloured part by choosing the correct type of data from the following type.(a) int(b) float(c) bool(d) str(e) function(f) list of int(g) list of str(i)if temp < 32 :
    print ("Freezing")(ii)L = ['Hiya', 'Zoya', 'Preet']
print(L[1])(iii)M = []
for i in range (3) :
    M.append(i)  
    print(M)      (iv)L = ['Hiya', 'Zoya', 'Preet']
n = len(L)
if 'Donald' in L[1 : n] :
     print(L)(v)if n % 2 == 0 : 
   print("Freezing")(vi)L = inputline.split()
while L != ( ) :
    print(L)
    L = L[1 :](vii)L = ['Hiya', 'Zoya', 'Preet']
print(L[0] + L[1])

Accepted Answer

(i) bool(ii) str(iii) list of int(iv) int(v) bool(vi) list of str(vii) str

Source: This question is from Python Revision Tour, Computer Science &mdash; Class 12, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Python Revision Tour: Question, Seven, Segments, Code, Part, Coloured. These are fundamental topics in Computer Science that students are expected to master as part of the CBSE Class 12 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 Science 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.
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Practice more questions from Python Revision Tour &mdash; Computer Science, Class 12 CBSE

Question 11

Question 27Write the output of the following Python code:for i in range(2,7,2):
    print(i*'$')

Accepted Answer

Output$$
$$$$
$$$$$$Explanationrange(2,7,2) returns [2, 4, 6] as it defines a range of 2 to 6 with a step of 2. The loop iterates as below:For i = 2, it prints $$.For i = 4, it prints $$$$.For i = 6, it prints $$$$$$.

Question 12

Question 1Fill in the missing lines of code in the following code. The code reads in a limit amount and a list of prices and prints the largest price that is less than the limit. You can assume that all prices and the limit are positive numbers. When a price 0 is entered the program terminates and prints the largest price that is less than the limit.#Read the limit limit = float(input("Enter the limit")) max_price = 0 # Read the next price next_price = float(input("Enter a price or 0 to stop:")) while next_price > 0 : #Read the next price if max_price > 0: else :

Accepted Answer

#Read the limit
limit = float(input("Enter the limit"))
max_price = 0
# Read the next price
next_price = float(input("Enter a price or 0 to stop:"))
while next_price > 0 :
    if next_price < limit and next_price > max_price:
        max_price = next_price
    #Read the next price 
    next_price = float(input("Enter a price or 0 to stop:"))
if max_price > 0:
    print("Largest Price =", max_price) 
else :
    print("Prices exceed limit of", limit);

Question 13

Question 2bPredict the output of the following code fragments:x = 10
y = 0
while x > y: 
   print (x, y)
   x = x - 1
   y = y + 1

Accepted Answer

Output10 0
9 1
8 2
7 3
6 4
ExplanationxyOutputRemarks10010 01st Iteration9110 09 12nd Iteration8210 09 18 23rd Iteration7310 09 18 27 34th Iteration6410 09 18 27 36 45th Iteration

Question 14

Question 2cPredict the output of the following code fragments:keepgoing = True        
x=100                   
while keepgoing :       
    print (x)
    x = x - 10 
    if x < 50 :
       keepgoing = False

Accepted Answer

Output100
90
80
70
60
50
ExplanationInside while loop, the line x = x - 10 is decreasing x by 10 so after 5 iterations of while loop x will become 40. When x becomes 40, the condition if x < 50 becomes true so keepgoing is set to False due to which the while loop stops iterating.

Question 15

Question 2ePredict the output of the following code fragments:for x in [1,2,3,4,5]:
    print (x)

Accepted Answer

Output1
2
3
4
5
Explanationx will be assigned each of the values from the list one by one and that will get printed.

Question 16

Question 2fPredict the output of the following code fragments:for p in range(1,10):
   print (p)

Accepted Answer

Output1
2
3
4
5
6
7
8
9
Explanationrange(1,10) will generate a sequence like this [1, 2, 3, 4, 4, 5, 6, 7, 8, 9]. p will be assigned each of the values from this sequence one by one and that will get printed.

Question 17

Question 2gPredict the output of the following code fragments:for z in range(-500, 500, 100):
    print (z)

Accepted Answer

Output-500
-400
-300
-200
-100
0
100
200
300
400
Explanationrange(-500, 500, 100) generates a sequence of numbers from -500 to 400 with each subsequent number incrementing by 100. Each number of this sequence is assigned to z one by one and then z gets printed inside the for loop.

Question 18

Question 2hPredict the output of the following code fragments:x = 10                     
y = 5                     
for i in range(x-y * 2):  
    print (" % ", i)

Accepted Answer

This code generates No Output.ExplanationThe x-y * 2 in range(x-y * 2) is evaluated as below:    x - y * 2⇒ 10 - 5 * 2⇒ 10 - 10 [∵ * has higher precedence than -]⇒ 0Thus range(x-y * 2) is equivalent to range(0) which returns an empty sequence — [ ].

Question 19

Question 2iPredict the output of the following code fragments:c = 0
for x in range(10): 
    for y in range(5):
        c += 1
print (c)

Accepted Answer

Output50
ExplanationOuter loop executes 10 times. For each iteration of outer loop, inner loop executes 5 times. Thus, the statement c += 1 is executed 10 * 5 = 50 times. c is incremented by 1 in each execution so final value of c becomes 50.

Question 20

Question 2kPredict the output of the following code fragments:for x in 'lamp':
    print(str.upper(x))

Accepted Answer

OutputL
A
M
P
ExplanationThe for loop extracts each letter of the string 'lamp' one by one and place it in variable x. Inside the loop, x is converted to uppercase and printed.

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