Solved 2025: FYUG Even Semester Exam, 2025 Computer Science: Python Programming

UNIT-I

1. (a) How do you declare a variable in Python? [1 Mark]

1. (c) What is sequence data type? [1 Mark]

2. (a) Mention the different features of Python programming language. [2 Marks]

• Easy to Read and Learn: Python has a simple syntax similar to the English language.
• Interpreted Language: Python code is executed line by line, making debugging easier.
• Dynamically Typed: You don't need to declare the type of variable; it is determined at runtime.
• Large Standard Library: Provides a rich set of modules and functions for various tasks.

2. (b) Difference between mutable and immutable data types. [2 Marks]

Feature Mutable Immutable Definition Objects whose state or content can be changed after creation. Objects whose state or content cannot be changed once created. Examples List, Dictionary, Set. Int, Float, String, Tuple.

3. (a) Discuss different built-in data types available in Python. [5 Marks]

Python provides several standard built-in data types categorized as follows

:
• Numeric Types: int, float, complex.
• Sequence Types: list, tuple, range.
• Text Type: str.
• Mapping Type: dict.
• Set Types: set, frozenset.
• Boolean Type: bool.
• Binary Types: bytes, bytearray, memoryview.

UNIT-II

4. (a) How do you write a basic 'if' statement in Python? [1 Mark]

A basic 'if' statement uses the if keyword followed by a condition and a colon

. The code block must be indented.
if x > 0:
    print("Positive")

5. (a) Write the importance of indentation in Python conditional statements. [2 Mark]

Indentation is mandatory in Python to define the scope of loops, functions, and conditional blocks

. While other languages use curly braces, Python uses whitespace to indicate which lines of code belong to a particular statement.

6. (a) Write the syntax and usage of 'break' and 'continue' statements. [5 Marks]

Break Statement: Used to terminate the loop entirely and move the control to the next statement after the loop

.
for i in range(5):
    if i == 3: break
    print(i) # Prints 0, 1, 2

Continue Statement: Used to skip the current iteration of the loop and move to the next iteration

.
for i in range(5):
    if i == 3: continue
    print(i) # Prints 0, 1, 2, 4

UNIT-III

7. (a) Define Python module. [1 Mark]

A Python module is a file containing Python definitions and statements (like functions and variables) that can be reused in other programs

.

7. (c) What is the purpose of the 'None' keyword? [1 Mark]

The None keyword is used to define a null value or no value at all

. It is an object of its own data type (NoneType).

8. (a) Differentiate between list and tuple. [2 Marks]

List Tuple Mutable (can be changed). Immutable (cannot be changed). Defined using square brackets []. Defined using parentheses ().

9. (a) Discuss various string manipulation operations available in Python. [5 Marks]

• Concatenation: Joining two strings using the + operator.
• Repetition: Repeating a string using the * operator.
• Slicing: Accessing a part of a string using [start:stop:step].
• upper() / lower(): Converting the case of the string.
• strip(): Removing whitespace from the beginning and end.

UNIT-IV

10. (a) Why is 'def' keyword used in Python? [1 Mark]

The def keyword is used to define a user-defined function in Python

.

10. (b) What do you mean by the lifetime of a variable? [1 Mark]

The lifetime of a variable is the period during which the variable exists in memory

. A variable's lifetime usually ends when the function in which it was defined returns.

11. (c) Write the general syntax to define a function in Python. [2 Mark]

def function_name(parameters):
    """docstring"""
    statement(s)
    return expression

12. (b) Demonstrate the concept of pass by value and pass by reference. [5 Marks]

Python uses a mechanism called "Pass by Object Reference"

. If you pass a mutable object (like a list), it behaves like pass by reference. If you pass an immutable object (like an integer), it behaves like pass by value.

UNIT-V

13. (b) Write down the purpose of tell() method. [1 Mark]

The tell() method returns the current file pointer position (the number of bytes from the beginning of the file)

.

13. (d) What is matplotlib? [1 Mark]

Matplotlib is a comprehensive library for creating static, animated, and interactive visualizations (graphs and plots) in Python

.

15. (a) Write a Python program to show exception handling. [5 Marks]

try:
    num = int(input("Enter a number: "))
    result = 10 / num
except ZeroDivisionError:
    print("Cannot divide by zero!")
except ValueError:
    print("Invalid input! Enter an integer.")
else:
    print("Result is", result)
finally:
    print("Execution complete.")

Exam Success Strategy

• Syntax Matters: Python is strict about indentation. In your exam, use a clear margin for indented blocks.
• Data Types: Be ready to compare Lists and Tuples—it's a favorite question.
• Control Flow: Always use colons (:) at the end of if, for, and while statements.
• File Handling: Remember that tell() gives the position, while seek() changes it.

Frequently Asked Formulas

Factorial (n!) = n * (n-1) * (n-2) * ... * 1
String Slicing = string[start : stop : step]

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