Question 1

Question 5Assertion (A): The conditional flow of control can be defined with the help of if statement.Reasoning (R): if statement executes one or more statements based on the given condition. If the condition evaluates to true, the statement block following the indentation gets executed, otherwise nothing gets executed.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

Both A and R are true and R is the correct explanation of A.ExplanationThe if statement in Python allows conditional flow of control. It evaluates a condition and executes one or more statements based on whether the condition is true or false. If the condition evaluates to true, the statement block following the if statement (indented code) gets executed, otherwise, if the condition is false, that block is skipped, and the program continues with the next statement after the if block.

Question 2

Question 6Assertion (A): Indexing refers to accessing elements of a sequence. Python offers two types of indexing, viz. positive or forward and negative or backward indexing.Reasoning (R): Both forward and backward indexing are implemented in all the sequences, which start with first (1st) index.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

A is true but R is false.ExplanationIndexing in Python refers to accessing elements of a sequence, such as strings, lists, tuples, etc. Python supports two types of indexing: positive (forward) indexing and negative (backward) indexing. In Python, indexing starts from 0, not from the first index (1st index). Forward indexing starts from the first element with an index of 0, while backward indexing starts from the last element with an index of -1.

Question 3

Question 8Assertion (A): There is no difference between a list and a tuple in Python.Reasoning (R): The list elements are enclosed within square brackets [] separated by commas and the tuple elements are enclosed within parentheses () separated by commas.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

A is false but R is true.ExplanationLists are mutable, meaning their elements can be changed after creation, and they are enclosed within square brackets [] separated by commas. On the other hand, tuples are immutable, so their elements cannot be changed after creation, and they are enclosed within parentheses () separated by commas. Hence, list and tuples are not same.

Question 4

Question 2What will be the output of the following code — print("100 + 200") ?300100200100 + 200200

Accepted Answer

100 + 200Reason — The output of the code print("100 + 200") will be: 100 + 200. This is because the code is printing the string "100 + 200" as it is written within double quotes. The arithmetic operation inside the string is not evaluated because it's treated as a part of the string literal, not as an actual expression.

Question 5

Question 3Which amongst the following is a mutable data type in Python ?intstringtuplelist

Accepted Answer

listReason — The mutable data type in Python from the options given is a list. Lists can be modified after creation, allowing elements to be added, removed, or modified within the list. In contrast, integers (int), strings, and tuples are immutable data types in Python, meaning their values cannot be changed once they are created.

Question 6

Question 7What will be the output generated by the following snippet?a = [5,10,15,20,25]
k = 1
i = a [1] + 1 
j = a [2] + 1 
m = a [k + 1]
print (i, j , m)11 15 1611 16 1511 15 1516 11 15

Accepted Answer

11 16 15Reason — The above code initializes a list named a with the values [5, 10, 15, 20, 25]. Then, the variable k is assigned the value 1. The value of i is calculated using indexing as the element at index 1 of list a (which is 10) plus 1, resulting in 'i = 11'. Similarly, j is calculated as the element at index 2 of list a (which is 15) plus 1, yielding 'j = 16'. m is calculated as the element at index (1 + 1 = 2) of list a, which is 15, leading to 'm = 15'. Finally, the code prints the values of 'i', 'j', and 'm', which are 11, 16, and 15 respectively.

Question 7

Question 16Which is the correct form of declaration of dictionary?Day = {1: 'monday', 2: 'tuesday', 3: 'wednesday'}Day = (1; 'monday', 2; ' tuesday', 3; 'wednesday')Day = [1: 'monday', 2: 'tuesday', 3: 'wednesday']Day = {1'monday', 2'tuesday', 3'wednesday']

Accepted Answer

Day = {1: 'monday', 2: 'tuesday', 3: 'wednesday'}Reason — The syntax of dictionary declaration is: = {:, :}According to this syntax, Day = {1:'monday', 2:'tuesday', 3:'wednesday'} is the correct answer.

Question 8

Question 18Identify the valid declaration of L:L = {1: 'Mon', 2 : '23', 3: 'hello', 4: '60.5'}dictionarystringtuplelist

Accepted Answer

dictionaryReason — The given declaration L = {1: 'Mon', 2: '23', 3: 'hello', 4: '60.5'} creates a dictionary in Python. Dictionaries are created using curly braces {}, and keys are separated from their corresponding values by a colon (:). Each key-value pair is separated by a comma (,) within the dictionary.

Question 9

Question 21Write the output of the following code:a = 10/2
b = 10//3
print(a, b)5 3.35.0 3.35.0 35 4

Accepted Answer

5.0 3Reason — The expression a = 10/2 performs floating-point division, resulting in a being assigned the value 5.0. Similarly, the expression b = 10//3 performs integer division (floor division), resulting in b being assigned the value 3. The print(a, b) statement prints the values of variables a and b, which are 5.0 and 3 respectively.

Question 10

Question 1What are the advantages of Python programming language?

Accepted Answer

Advantages of Python programming language are:Easy to Use — Python is compact, programmer-friendly and very easy to use object oriented language with very simple syntax rules.Expressive Language — Python is an expressive language, it takes fewer lines of codes to represent the same syntax.Interpreted Language — Python is an interpreted language, not a compiled language. It makes Python an easy-to-debug language and thus suitable for beginners to advanced users.Completeness — Python has a rich standard library that provides modules for most types of required functionality like emails, web-pages, databases, GUI development, network connections, etc.Cross-platform Language — Python can run equally well on variety of platforms — Windows, Linux/UNIX, Macintosh, supercomputers, smart phones, etc.Free and Open Source — Python language is freely available along with its source-code.Variety of Usage/Applications — Python has evolved into a powerful, complete and useful language over these years. These days Python is being used in many diverse fields/applications, some of which are Scripting, Web Applications, Game development, Database Applications, System Administrations, Rapid Prototyping, GUI Programs.

Question 11

Question 4Write Python statement for the following in interactive mode:To display sum of 3, 8.0, 6*12To print sum of 16, 5.0, 44.0

Accepted Answer

1.>>> 3 + 8.0 + 6 * 122.>>> print(16 + 5.0 + 44.0)

Question 12

Question 9(i)Write the output of the following:for i in '123':
    print("CPU", i)

Accepted Answer

OutputCPU 1
CPU 2
CPU 3
ExplanationThe for loop iterates over each character in the string '123' using the in operator, and during each iteration, the variable i takes on the value of each character in the string. The print("CPU", i) statement then prints the string "CPU" followed by the value of i during each iteration of the loop.

Question 13

Question 9(ii)Write the output of the following:for i in [100, 200, 300]: 
    print(i)

Accepted Answer

Output100
200
300
ExplanationThe for loop iterates over each element in the list [100, 200, 300] using the in operator, and during each iteration, the variable i takes on the value of each element in the list. The print(i) statement then prints the value of i during each iteration of the loop.

Question 14

Question 9(iii)Write the output of the following:for j in range(10, 6, -2): 
    print(j*2)

Accepted Answer

Output20
16
ExplanationThe range(10, 6, -2) function creates a range starting from 10 and decrementing by 2 until it reaches 6 (but does not include 6), resulting in the sequence [10, 8]. The for j in range(10, 6, -2): statement sets up a for loop that iterates over each element in the generated sequence [10, 8]. During each iteration of the loop, the print(j*2) statement prints the value of j multiplied by 2.

Question 15

Question 9(iv)Write the output of the following:for x in range(1, 6): 
    for y in range(1, x+1):
        print (x, ' ', y)

Accepted Answer

Output1   1
2   1
2   2
3   1
3   2
3   3
4   1
4   2
4   3
4   4
5   1
5   2
5   3
5   4
5   5
ExplanationThe code features two nested for loops. The outer loop iterates over values from 1 to 5 (inclusive) and assigns each to x. The inner loop iterates from 1 to the x + 1 value and assigns each to y. The print(x, ' ', y) statement outputs x and y separated by a space during each iteration. This arrangement generates combinations of (x, y) pairs.

Question 16

Question 9(v)Write the output of the following:for x in range(10, 20): 
    if (x == 15):
        break
print(x)

Accepted Answer

Output15
ExplanationThe code sets up a for loop that iterates over a range of numbers from 10 to 19. During each iteration, the variable x takes on these values sequentially. Within the loop, an if statement checks if x is equal to 15. When x reaches 15, the condition is met, and the break statement is executed, immediately exiting the loop. As a result, the loop terminates prematurely, and the value of x at the point of exit, which is 15, is printed.

Question 17

Question 9(vi)Write the output of the following:for x in range(10, 20): 
    if (x % 2 == 0): 
       continue
print(x)

Accepted Answer

Output19
ExplanationIn the provided code, a for loop iterates over a range of numbers from 10 to 19. Within the loop, an if statement checks if the current value of x is even (divisible by 2) using the modulo operator '%'. If x is even, the continue statement is executed, causing the loop to skip the rest of the code in that iteration and move to the next iteration. As a result, only odd numbers in the range 10 to 19 will be considered. After the loop completes, the value of x will be the last value of the iteration, which is 19. Therefore, the output of the code will be 19.

Question 18

Question 10Write the output of the following program on execution if x = 50:if x > 10:
    if x > 25:
        print("ok")
    if x > 60:
        print("good")
elif x > 40:
    print("average")
else:
    print("no output")

Accepted Answer

Outputok
ExplanationThe provided code consists of nested conditional statements to determine the output based on the value of the variable x. If x is greater than 10, it checks additional conditions. If x is greater than 25, it prints "ok," and if x is greater than 60, it prints "good." If x is not greater than 10 but is greater than 40, it prints "average." Otherwise, if none of the conditions are met, it prints "no output".

Question 19

Question 12What are the similarities between strings and lists?

Accepted Answer

Both strings and lists are sequential data types, meaning they store elements in a specific order. They support indexing, allowing access to individual elements using square brackets notation '[]'. Additionally, both strings and lists support slicing, enabling us to extract portions of the sequence using the colon (:) operator. They can also be iterated over using loops such as for loops, facilitating access to each element one by one in the sequence. Furthermore, both strings and lists support the in and not in operators, which check for the presence or absence of a particular element in the sequence.

Question 20

Question 14What is the difference between insert() and append() methods of a list?

Accepted Answer

Insert MethodAppend MethodThe insert() method is used to add an element at a specific index in the list.The append() method is used to add an element at the end of the list.The syntax is: list.insert(index, element).The Syntax is: list.append(element).Example: my_list.insert(2, 'hello') will insert the string 'hello' at index 2 in the list my_list.Example: my_list.append('world') will add the string 'world' at the end of the list my_list.

Review of Python Basics

Assertions And Reasons

Multiple Choice Questions

Solutions To Unsolved Questions