Question 1

Question 3Assertion (A): The process of repeating a set of elements in a string is termed as replication.Reasoning (R): Repetition allows us to repeat the given string using (*) operator along with a number that specifies the number of replications.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.ExplanationIn Python, the process of repeating a string multiple times is referred to as repetition or replication. This is done using the (*) operator, where a string is multiplied by an integer to create a new string that repeats the original string the specified number of times.

Question 2

Question 12What will be the output of the following code?A = 'Virtual Reality'
A.replace('Virtual', 'Augmented')
Virtual AugmentedReality AugmentedAugmented VirtualAugmented Reality

Accepted Answer

Augmented RealityReason — The replace() method creates and returns a new string with the specified substring replaced, without altering the original string. In this case, 'Virtual' is replaced by 'Augmented', resulting in 'Augmented Reality'.

Question 3

Question 13What will be the output of the following?print("ComputerScience".split("er", 2))["Computer", "Science"]["Comput", "Science"]["Comput", "erScience"]["Comput", "er", "Science"]

Accepted Answer

["Comput", "Science"]Reason — The split() method splits a string into a list of substrings based on the specified delimiter. In this case, "er" is the delimiter. The second argument 2 is the maximum number of splits to be made. "ComputerScience" is split using "er" as the delimiter. The first occurrence of "er" splits "ComputerScience" into "Comput" and "Science". Since the 2 splits limit is applied, it does not continue searching for additional delimiters beyond the first one. Thus, the output is ['Comput', 'Science'].

Question 4

Question 15STR = "RGBCOLOR"
colors = list(STR)How do we delete 'B' in given List colors?del colors[2]colors.remove("B")colors.pop(2)All of these

Accepted Answer

All of theseReason — The statement STR = "RGBCOLOR" assigns the string "RGBCOLOR" to the variable STR, and colors = list(STR) converts this string into a list of its individual characters. As a result, colors will be ['R', 'G', 'B', 'C', 'O', 'L', 'O', 'R']. All of the methods mentioned can be used to delete 'B' from the list colors. Using del colors[2] removes the item at index 2, which is 'B'. The colors.remove("B") method removes the first occurrence of the value 'B'. Similarly, colors.pop(2) removes and returns the item at index 2, which is 'B'.

Question 5

Question 1How does '*' operator behave on strings?

Accepted Answer

The * operator creates a new string by repeating multiple copies of the same string.For example,string = "abc"
repeated_string = string * 3
print(repeated_string)Outputabcabcabc
In the above example, the string "abc" is repeated 3 times to produce "abcabcabc".

Question 6

Question 2Explain function split() with an example.

Accepted Answer

The split() function breaks up a string at the specified separator and returns a list of substrings. The syntax is str.split([separator, [maxsplit]]). The split() method takes a maximum of 2 parameters:separator (optional) — The separator is a delimiter. The string splits at the specified separator. If the separator is not specified, any whitespace (space, newline, etc.) string is a separator.maxsplit (optional) — The maxsplit defines the maximum number of splits. The default value of maxsplit is -1, which means no limit on the number of splits.For example,x = "blue;red;green"
print(x.split(";"))Output['blue', 'red', 'green']

Question 7

Question 4Write the output of the following:>>> x = "hello"
>>> print(x[1:-2])

Accepted Answer

Outputel
ExplanationThe statement x[1:-2] slices the string "hello" starting from index 1 up to index -3. This results in the substring "el", so print(x[1:-2]) outputs "el".

Question 8

Question 5(a)Write the output of the following:string = "Hello Madam, I love Tutorials"
substring = "Madam"
if string.find(substring) != -1:
    print("Python found the substring!")
else:
    print("Python did NOT find the substring!")

Accepted Answer

OutputPython found the substring!
ExplanationThe code checks if the substring "Madam" exists in the string "Hello Madam, I love Tutorials" using the find() method. Since "Madam" is present in the string, find() returns the starting index of "Madam", which is not -1. Therefore, the condition string.find(substring) != -1 evaluates to True, and the code prints "Python found the substring!".

Question 9

Question 5(b)Write the output of the following:s = "Strings in Python"
print(s.capitalize())
print(s.title())
s6 = s.replace("in", "data type")
print(s6)

Accepted Answer

OutputStrings in python
Strings In Python
Strdata typegs data type Python
ExplanationThe s.capitalize() method capitalizes the first letter of the string and converts the rest to lowercase, resulting in "Strings in python". The s.title() method capitalizes the first letter of each word, producing "Strings In Python". The s.replace("in", "data type") method replaces occurrences of "in" with "data type", giving "Strdata typegs data type Python" as output.

Question 10

Question 6Find the output of the following:word = 'work hard'
result = word.find('work')
print("Substring, 'work', found at index:", result)
result = word.find('har') 
print("Substring, 'har ' ,found at index:", result)
if (word.find('pawan') != -1):
    print("Contains given substring ")
else: 
    print("Doesn't contain given substring")

Accepted Answer

OutputSubstring, 'work', found at index: 0
Substring, 'har ' ,found at index: 5
Doesn't contain given substring
ExplanationThe code first searches for the substring 'work' in 'work hard' using find(), which is located at index 0, so it prints "Substring, 'work', found at index: 0". Next, it searches for 'har', which starts at index 5, resulting in "Substring, 'har ', found at index: 5". Finally, it checks if 'pawan' is in the string; since it is not, find() returns -1, and the code prints "Doesn't contain given substring".

Question 11

Question 7Consider the following string mySubject:mySubject = "Computer Science"What will be the output of the following string operations?(i) print (mySubject [0:len(mySubject)])(ii) print (mySubject[-7:-1])(iii) print (mySubject[::2])(iv) print (mySubject [len (mySubject) -1])(v) print (2*mySubject)(vi) print (mySubject[::-2])(vii) print (mySubject[:3] + mySubject[3:])(viii) print (mySubject.swapcase() )(ix) print (mySubject.startswith('Comp') )(x) print (mySubject.isalpha() )

Accepted Answer

(i) Computer Science(ii) Scienc(iii) Cmue cec(iv) e(v) Computer ScienceComputer Science(vi) eniSrtpo(vii) Computer Science(viii) cOMPUTER sCIENCE(ix) True(x) FalseExplanation(i) It slices the string from index 0 to the length of the string, which returns the entire string.(ii) It uses backward slicing to extract a substring starting from the 7th character from the end to the second-to-last character.(iii) It slices the string by taking every second character starting from index 0.(iv) The code first calculates the length of the string mySubject, which is 16. It then accesses the character at the index len(mySubject) - 1, which is 15, corresponding to the last character of the string, 'e'.(v) It multiplies the string mySubject by 2, which duplicates the string.(vi) It slices the string mySubject with a step of -2, which reverses the string and selects every second character.(vii) The code print(mySubject[:3] + mySubject[3:]) combines two slices of the string mySubject. mySubject[:3] extracts the first three characters, and mySubject[3:] extracts the substring from the fourth character to the end. Concatenating these substrings prints 'Computer Science'.(viii) The swapcase() function converts all uppercase letters in the string mySubject to lowercase and all lowercase letters to uppercase.(ix) The startswith() function checks if the string mySubject starts with the substring 'Comp'. It returns True because mySubject begins with 'Comp'.(x) The isalpha() function checks if all characters in the string mySubject are alphabetic. It returns False because the string contains spaces, which are not alphabetic characters.

Question 12

Question 8Write the Python statement and the output for the following:(a) Find the third occurrence of 'e' in 'sequence'.(b) Change the case of each letter in string 'FuNcTioN'.(c) Whether 'Z' exists in string 'School' or not.

Accepted Answer

(a)s = 'sequence'
index = s.find('e', s.find('e', s.find('e') + 1) + 1)
print(index)Output7
(b)s = 'FuNcTioN'
print(s.swapcase())OutputfUnCtIOn
(c)s = 'School'
print('Z' in s)OutputFalse

Question 13

Question 9Consider the string str1 = "Global Warming".Write statements in Python to implement the following:(a) To display the last four characters.(b) To replace all the occurrences of letter 'a' in the string with "*".

Accepted Answer

(a)str1 = "Global Warming"
last_four = str1[-4:]
print(last_four)Outputming
(b)str1 = "Global Warming"
replaced_str = str1.replace('a', '*')
print(replaced_str)OutputGlob*l W*rming

Question 14

Question 10What will be the output of the following code?Text = "Mind@Work!" 
ln = len(Text)
nText = ""
for i in range(0, ln):
    if Text[i].isupper():
        nText = nText + Text[i].lower()
    elif Text[i].isalpha(): 
        nText = nText + Text[i].upper() 
else: 
    nText = nText + 'A'
print(nText)

Accepted Answer

OutputmINDwORKA
ExplanationBelow is the detailed step by step explanation of the program:InitializationText = "Mind@Work!"
ln = len(Text)
nText = ""Text is initialized with the string "Mind@Work!".ln holds the length of Text, which is 10 in this case.nText is initialized as an empty string, which will hold the transformed characters.Loop through each characterfor i in range(0, ln):
    if Text[i].isupper():
        nText = nText + Text[i].lower()
    elif Text[i].isalpha(): 
        nText = nText + Text[i].upper()
else: 
    nText = nText + 'A'A for loop iterates over each index i from 0 to ln-1 (i.e., 0 to 9).Conditions within the loop:Text[i].isupper(): Checks if the character at index i in the string Text is an uppercase letter.If true, it converts the character to lowercase using Text[i].lower() and appends it to nText.elif Text[i].isalpha(): Checks if the character at index i in the string Text is an alphabetic letter (either uppercase or lowercase).If the character is alphabetic but not uppercase, it converts the character to uppercase using Text[i].upper() and appends it to nText.else statement of loop:The else statement in this context is associated with the for loop, meaning it executes after the loop has completed iterating over all the indices.nText = nText + 'A' appends the character 'A' to the end of nText.Printing the resultprint(nText)This line prints the final value of nText.Step-by-Step Execution1. Initial States:Text = "Mind@Work!"ln = 10nText = ""2. Loop Iterations:IndexCharacterConditionTransformationnText0'M'isupper() is True'm'"m"1'i'isalpha() is True'I'"mI"2'n'isalpha() is True'N'"mIN"3'd'isalpha() is True'D'"mIND"4'@'neither condition is True-"mIND"5'W'isupper() is True'w'"mINDw"6'o'isalpha() is True'O'"mINDwO"7'r'isalpha() is True'R'"mINDwOR"8'k'isalpha() is True'K'"mINDwORK"9'!'neither condition is True-"mINDwORK"3. Post Loop Execution:The loop is complete, so the else statement appends 'A' to nText.nText = "mINDwORK" + "A" = "mINDwORKA"4. Print Output:print(nText) outputs "mINDwORKA".

Question 15

Question 13Write a program that takes a sentence as an input parameter where each word in the sentence is separated by a space. The function should replace each blank with a hyphen and then return the modified sentence.Solutionsentence = input("Enter a sentence: ")

modified_sentence = sentence.replace(' ', '-')

print(modified_sentence)OutputEnter a sentence: Innovation drives progress
Innovation-drives-progress

Accepted Answer

sentence=input("Enter a sentence: ")modified_sentence=sentence.replace(' ','-')print(modified_sentence)OutputEnter a sentence: Innovation drives progressInnovation-drives-progress

Question 16

Question 15What will be the output of the following programming code?str = "My Python Programming"
print (str[-5:-1])
print (str[1:5])
print (str[:-4])
print (str[0:])
print (str[:13-4])
print (str[:3])

Accepted Answer

Outputmmin
y Py
My Python Program
My Python Programming
My Python
My 
Explanationstr[-5:-1] extracts the substring from the 5th last character up to, but not including, the last character: "mmin".str[1:5] extracts the substring from index 1 to 4: "y Py".str[:-4] extracts the substring from the beginning up to, but not including, the last 4 characters.str[0:] extracts the substring from index 0 to the end.str[:13-4] is equivalent to str[:9], which extracts the substring from the beginning up to, but not including, index 9: "My Python".str[:3] extracts the substring from the beginning up to, but not including, index 3: "My ".

Question 17

Question 16Write a program to count the number of each vowel in a given string.Solutioninput_string = input("Enter a string: ")
vowel_count = {'a': 0, 'e': 0, 'i': 0, 'o': 0, 'u': 0}
input_string = input_string.lower()

for char in input_string:
    if char in vowel_count:
        vowel_count[char] += 1

print("Vowel counts:", vowel_count)OutputEnter a string: The quick brown fox jumps over the lazy dog.
Vowel counts: {'a': 1, 'e': 3, 'i': 1, 'o': 4, 'u': 2}

Accepted Answer

input_string=input("Enter a string: ")vowel_count={'a':0,'e':0,'i':0,'o':0,'u':0}input_string=input_string.lower()forcharininput_string:ifcharinvowel_count:vowel_count[char]+=1print("Vowel counts:",vowel_count)OutputEnter a string: The quick brown fox jumps over the lazy dog.Vowel counts: {'a': 1, 'e': 3, 'i': 1, 'o': 4, 'u': 2}

Question 18

Question 17Write a program that reads a line, then counts how many times the word 'is' appears in the line and displays the count.Solutionline = input("Enter a line: ")
line = line.lower()
words = line.split()
count = words.count('is')
print("The word 'is' appears", count, "times.")OutputEnter a line: The project is ambitious, and its success is dependent on how well it is managed and executed.
The word 'is' appears 3 times.

Accepted Answer

line=input("Enter a line: ")line=line.lower()words=line.split()count=words.count('is')print("The word 'is' appears",count,"times.")OutputEnter a line: The project is ambitious, and its success is dependent on how well it is managed and executed.The word 'is' appears 3 times.

Question 19

Question 18Write a program to remove 'i' (if any) from a string.Solutioninput_string = input("Enter a string: ")
result_string = input_string.replace('i', '')
print("String after removing 'i':", result_string)OutputEnter a string: institute
String after removing 'i': nsttute

Accepted Answer

input_string=input("Enter a string: ")result_string=input_string.replace('i','')print("String after removing 'i':",result_string)OutputEnter a string: instituteString after removing 'i': nsttute

Strings in Python

Assertions And Reasons

Multiple Choice Questions

Solutions To Unsolved Questions