Q. List out main differences between lists & tuple.
Mutability: Lists are mutable, meaning their elements can be modified after creation. Tuples are immutable, and once created, their elements cannot be changed.
Syntax: Lists are defined using square brackets [], while tuples use parentheses ().
Performance: Tuples generally have better performance than lists, especially in terms of iteration and memory usage.
Methods: Lists have more built-in methods compared to tuples because of their mutability.
Q. Demonstrate set with example.
# Set Example
fruits = {"apple", "banana", "orange"}
print(fruits)
# Adding an element to the set
fruits.add("grape")
print(fruits)
# Removing an element from the set
fruits.remove("banana")
print(fruits)
- Python is case sensitive language. Comment.
Yes, Python is case-sensitive. Variable names variable and Variable are considered different.
- Write a python program to calculate XY.
# Python Program to Calculate XY
x = 2
y = 3
result = x ** y
print(result)
- Write a python program to accept a number and check whether it is
perfect number or not.
# Python Program to Check Perfect Number
def is_perfect_number(num):
divisors_sum = sum(i for i in range(1, num) if num % i == 0)
return divisors_sum == num
number = int(input("Enter a number: "))
if is_perfect_number(number):
print(f"{number} is a perfect number.")
else:
print(f"{number} is not a perfect number.")
-Demonstrate list slicing.
# List Slicing Demonstration
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9]
subset = numbers[2:7] # Elements from index 2 to 6
print(subset)
-A tuple is ordered collection of items. Comment.
Yes, a tuple is an ordered collection of items. The order of elements in a tuple is preserved.
-Write a recursive function in Python to display addition of digits in
single digit.
def sum_digits(n):
# Base case: single-digit number
if n < 10:
return n
else:
return sum_digits(sum(map(int, str(n))))
result = sum_digits(12345)
print(f"Sum of digits in single digit: {result}")
-Write a program in python to accept 'n' integers in a list, compute &
display addition of all squares of these integers.
n = int(input("Enter the value of n: "))
numbers = [int(input(f"Enter integer {i + 1}: ")) for i in range(n)]
sum_squares = sum(x**2 for x in numbers)
print(f"Addition of squares: {sum_squares}")
- Explain the function enumerate( ).
The enumerate() function in Python is used to iterate over a sequence (such as a list) while keeping track of the index of the current item. It returns pairs of the form (index, value).
-- Explain the extend method of list.
Answer: The extend() method in Python is a built-in method that is used to extend the elements of a list by appending elements from an iterable (e.g., another list, tuple, string, etc.)
# Original list fruits = ['apple', 'banana', 'orange'] # Another list to extend 'fruits' additional_fruits = ['grape', 'kiwi', 'watermelon'] # Using extend() to add elements from 'additional_fruits' to 'fruits' fruits.extend(additional_fruits) # Display the modified 'fruits' list print(fruits)
- What are required arguments in function?
Answer: Required arguments are the arguments that a function must receive in a specific order for it to work correctly.
def add_numbers(x, y): result = x + y return result # Calling the function with required arguments sum_result = add_numbers(3, 5) print("Sum:", sum_result)
add_numbers function has two parameters (x and y), both of which are required. When calling the function, you need to provide values for these parameters in the order they are defined in the function signature (add_numbers(3, 5)).- Explain any 2 built-in list functions.
Answer:
1) len(): The len() function returns the number of elements in a list or the length of any iterable object.
my_list = [1, 2, 3, 4, 5] length_of_list = len(my_list) print("Length of the list:", length_of_list)
append() method is used to add an element to the end of a list.Updated list: ['apple', 'banana', 'orange', 'grape']
- Write a Python program to print even length words in a string.
- def print_even_length_words(sentence): words = sentence.split() even_length_words = [word for word in words if len(word) % 2 == 0] print("Even length words:", even_length_words) # Example usage: input_sentence = input("Enter a sentence: ") print_even_length_words(input_sentence)
- Write a Python program to check if a given key already exists in a dictionary.
- def check_key_in_dict(my_dict, key): if key in my_dict: print(f"The key '{key}' already exists in the dictionary.") else: print(f"The key '{key}' does not exist in the dictionary.") # Example usage: my_dictionary = {'name': 'John', 'age': 25, 'city': 'New York'} input_key = input("Enter a key to check in the dictionary: ") check_key_in_dict(my_dictionary, input_key)
Write a Python program to find GCD of a number using recursion.