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Python 2024 (Reg/Rep) Solved Question Paper Python Programming

Time: 2 Hrs | Max. Marks: 60

Section - A

I. Answer any TEN questions. (10×2=20)

1. Mention any four features of python.
  • Portable

  • Easy to Learn

  • Interpreted Language

  • Cross-Platform

  • Extensive Libraries

  • High-Level Language
2. What are IOE's in python?

IOE stands for Input-Output Errors (or Input/Output Exceptions). These are exceptions that occur during file operations or data stream handling (e.g., reading/writing files, network communication)

Example:

try:
    file = open("data.txt")
except IOError:
    print("File not found.")
3. Define exception. Give example.

An Exception in Python is an error that occurs during the execution of a program, which disrupts the normal flow of the program. Instead of crashing the program, exceptions can be caught and handled using error handling mechanisms like try-except

Example:

try:
    x = 5 / 0
except ZeroDivisionError:
    print("Cannot divide by zero")
4. Define function. Mention types of function.

Function: A reusable block of code that performs a specific task.

Types:

  • Built-in Functions: Predefined in Python (e.g., len(), print()).
  • User-defined Functions: Created by the programmer (e.g., def my_function():)
5. What is command line argument? Give example.

A command line argument is an input value passed to a Python script when it is executed from the terminal/command prompt. These arguments allow users to customize the program’s behavior without modifying the code.

Example:

python script.py arg1 arg2

Here, arg1 and arg2 are command line arguments accessed via sys.argv.

Code:

import sys
print(sys.argv[1]) # prints 'arg1'
6. Mention types of files in python.

  1. Text Files – Store data in readable format (.txt, .csv).

  2. Binary Files – Store data in binary format (.bin, .jpg).

7. What are lists? Give syntax.

list is a built-in data structure that is used to store multiple items in a single variable. Lists are ordered, mutable, and can contain elements of different data types, such as integers, strings, floats, or even other lists.

Example:

my_list = [1, 2, 3, 'hello']
8. What are pandas and series in python?
  • Pandas is a powerful, open-source data analysis and data manipulation library in Python. It provides data structures and functions that are specifically designed for working with structured data such as tables, spreadsheets, and databases.
  • A Series is one of the core data structures in Pandas. It is a one-dimensional labeled array, capable of holding data of any type (integers, strings, floats, etc.).
9. Define Numpy? Give syntaxх.

NumPy (Numerical Python) is a library for numerical computations and array processing.

Syntax:

import numpy as np
arr = np.array([1, 2, 3])
10. What is Escape sequence in python? Give example.

An escape sequence in Python is a combination of a backslash (\) followed by a special character, used to represent non-printable or reserved characters in strings.

Example:

print("Hello\nWorld") # \n creates a new line
11. List any Two differences between Lists and Dictionaries.
ListDictionary
Uses index numbers to access elements.Uses keys to access values.
Ordered collection (as of Python 3.7+).Unordered collection (in older versions).
Elements are stored as single values.Data is stored as key-value pairs.
Created using square brackets [ ].Created using curly braces { }.
Supports duplicate elements.Keys must be unique; values can be duplicated.
12. Mention methods of Tkinter.
  • pack(): Auto-arranges widgets.
  • grid(): Places widgets in a grid layout.
  • place(): Positions widgets at exact coordinates.
  • mainloop(): Starts the GUI event loop.

Section - B

II. Answer any FOUR of the following. (4×5=20)

13. Explain for Loop and While loop with program.

For Loop

  • Used when the number of iterations is known.
  • Iterates over sequences (lists, tuples, strings).

Example:

for i in range(5):  # Prints 0 to 4
    print(i)

While Loop

  • Runs until a condition is False.
  • Used when iterations are unknown.

Example:

count = 0
while count < 5:  # Prints 0 to 4
    print(count)
    count += 1
14. With an example explain try-except and finally blocks.

try Block:

  • The code that might raise an exception is placed inside the try block.
  • Python runs this code and checks for errors during execution.

except Block:

  • If an exception occurs in the try block, Python jumps to the except block.
  • This block contains code that handles the error.

finally Block:

  • The finally block is always executed, whether an exception occurred or not.
  • It is often used to release resources, like closing files or database connections

Example:

try:
    a = int(input("Enter a number: "))
    b = 10 / a
    print("Result:", b)
except ZeroDivisionError:
    print("Cannot divide by zero.")
finally:
    print("Execution completed.")
15. Define Tuple. Give example for create update and delete operations.

For deadlock to occur in a system, four necessary conditions must hold simultaneously. These conditions are described by Coffman’s Conditions:

  1. Mutual Exclusion: Only one process can use a resource at a time. If a resource is allocated to one process, others must wait.
  2. Hold and Wait: A process is holding at least one resource and waiting to acquire additional resources that are currently being held by other processes.
  3. No Preemption: Resources cannot be forcibly taken away from a process. A resource can be released only voluntarily by the process holding it.
  4. Circular Wait: A set of processes are waiting for each other in a circular chain. Each process holds at least one resource and is waiting for a resource held by the next process in the chain.
16. Write a program to create parent class and child class using inheritance.
# Parent Class
class Animal:
    def __init__(self, name):
        self.name = name

    def speak(self):
        print(f"{self.name} makes a sound.")

# Child Class
class Dog(Animal):
    def speak(self):
        print(f"{self.name} barks.")

# Creating an object of Parent Class
animal1 = Animal("Generic Animal")
animal1.speak()   # Output: Generic Animal makes a sound.

# Creating an object of Child Class
dog1 = Dog("Tommy")
dog1.speak()      # Output: Tommy barks.
17. Write a short note on Numpy.

NumPy (Numerical Python) is a fundamental package for scientific computing in Python, providing support for multi-dimensional arrays and mathematical functions.

Features of NumPy:

  • Provides a high-performance array object called ndarray.

  • Supports mathematical, logical, and statistical operations on arrays.

  • Offers broadcasting, which allows operations on arrays of different shapes.

  • Efficient in handling large datasets.

  • Used in data science, machine learning, image processing, and more.

Syntax and Example:

import numpy as np

# Creating a NumPy array
arr = np.array([1, 2, 3, 4, 5])

# Display array and perform operation
print("Array:", arr)
print("Array multiplied by 2:", arr * 2)

Section - C

Answer any TWO questions. (2×10=20)

18. Mention types of operators. Explain any four operators with example.

Types of Operators in Python

  1. Arithmetic (+, -, *, /, %, **, //)

  2. Comparison (==, !=, >, <, >=, <=)

  3. Logical (and, or, not)

  4. Assignment (=, +=, -=, *=, /=)

  5. Bitwise (&, |, ^, ~, <<, >>)

  6. Identity (is, is not)

  7. Membership (in, not in)

Explained with Examples:

  1. Arithmetic (+, **)

    print(5 + 3)    # Output: 8 (Addition)
print(2 ** 3)   # Output: 8 (Exponentiation)

  2. Assignment (+=)

    x = 5
x += 2  # Equivalent to x = x + 2
print(x)  # Output: 7

  3. Logical (and)

    print(True and False)  # Output: False

  4. Membership (in)

    fruits = ["apple", "banana"]
print("banana" in fruits)  # Output: True
19. Explain operations on strings with program example.

String Operations:

  1. Concatenation (+)

  2. Repetition (*)

  3. Slicing ([start:end])

  4. Length (len())

  5. Methods like lower(), upper(), replace(), find()

Example:

str1 = "Hello"
str2 = "World"

# Concatenation
print(str1 + " " + str2)  # Hello World

# Repetition
print(str1 * 2)  # HelloHello

# Slicing
print(str1[1:4])  # ell

# String methods
print(str1.lower())  # hello
print(str2.replace("World", "Python"))  # Python

Output:

Hello World  
HelloHello  
ell  
hello  
Python
20. a) Write a short note on file.

A file is a named location on disk used to store related data permanently. Files allow programs to read input from and write output to persistent storage (e.g., HDD, SSD).

Types of Files

  • Text Files: Human-readable (.txt, .csv, .json).
  • Binary Files: Machine-readable (.jpg, .dat, .pickle).

File Operations:

  • Opening: open("file.txt", mode="r")
  • Modes: r (read), w (write), a (append), r+ (read/write).
  • Reading: file.read(), file.readlines().
  • Writing: file.write("text").
  • Closing: file.close() (or use with for auto-close).

Example:

file = open("sample.txt", "w")
file.write("Hello, Python file handling!")
file.close()
b) Write a program for line chart.
import matplotlib.pyplot as plt

# Sample data
x = [1, 2, 3, 4, 5]
y = [2, 4, 1, 8, 6]

# Plotting the line chart
plt.plot(x, y, marker='o', color='blue', linestyle='--')

# Adding titles and labels
plt.title("Simple Line Chart")
plt.xlabel("X-axis")
plt.ylabel("Y-axis")

# Show the chart
plt.show()

Operating System  2024 Regular Solved QP

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