Python Programming (1323203) - Summer 2024 Solution

Solution guide for Python Programming (1323203) Summer 2024 exam

June 18, 2024

study-material solutions python 1323203 2024 summer

Question 1(a) [3 marks]

Lists the Importance of flowchart and algorithm

Answer:

Importance of Flowchart	Importance of Algorithm
Visual representation of program logic	Step-by-step procedure to solve a problem
Easier to debug and identify errors	Language-independent solution approach
Helps in understanding complex processes	Serves as a foundation for programming
Improves communication among team members	Defines logic before coding begins

Mnemonic: "VASE Decisions" - Visualize, Analyze, Sequence, Execute

Question 1(b) [4 marks]

Draw a flowchart to find the entered number is even or odd.

Answer:

Key Steps:

Input collection: Get number from user
Modulo operation: Divide by 2 and check remainder
Conditional output: Display result based on remainder

Mnemonic: "MODE" - Modulo Operation Determines Evenness

Question 1(c) [7 marks]

List out all Logical operators and explain each by giving python code example.

Answer:

Operator	Description	Example	Output
`and`	Returns True if both statements are true	`x = 5; print(x > 3 and x < 10)`	`True`
`or`	Returns True if one of the statements is true	`x = 5; print(x > 10 or x == 5)`	`True`
`not`	Reverse the result, returns False if result is true	`x = 5; print(not(x > 3))`	`False`

Code Example:

Python

Mnemonic: "AON Clarity" - And, Or, Not for logical clarity

Question 1(c) OR [7 marks]

Develop a Program that can calculate simple interest and compound interest on given data.

Answer:

Python

Key Formulas:

Simple Interest (SI): Principal × Rate × Time / 100
Compound Interest (CI): Principal × ((1 + Rate/100)^Time - 1)

Mnemonic: "PRT Money Grows" - Principal, Rate, Time make money grow

Question 2(a) [3 marks]

Create a Program to find a minimum number among the given three numbers.

Answer:

Python

Mnemonic: "MIN Finds Least" - Minimum Is Numerically Found with Least

Question 2(b) [4 marks]

Define pseudocode. Write pseudocode to find Largest of three numbers x, y and z.

Answer:

Pseudocode Definition
A detailed yet readable description of what a computer program must do, expressed in a formally-styled natural language rather than in a programming language.

Pseudocode for finding largest of three numbers:

BEGIN
    INPUT x, y, z
    SET largest = x
    
    IF y > largest THEN
        SET largest = y
    END IF
    
    IF z > largest THEN
        SET largest = z
    END IF
    
    OUTPUT "Largest number is: ", largest
END

Mnemonic: "PIE Writing" - Program Ideas Expressed in simple writing

Question 2(c) [7 marks]

Explain While loop in python with its syntax, flowchart and with python code example.

Answer:

Syntax:

Python

Flowchart:

Code Example:

Python

Key Characteristics:

Entry controlled: Condition checked before loop execution
Initialization: Variables set before the loop
Updation: Variables updated inside the loop
Termination: Loop exits when condition becomes False

Mnemonic: "IUTE Loop" - Initialize, Update, Test for Exit

Question 2(a) OR [3 marks]

Describe continue statement in python in brief.

Answer:

Continue Statement in Python
The continue statement skips the current iteration of a loop and continues with the next iteration
When encountered, the code inside the loop following the continue statement is skipped
Useful for skipping specific conditions while keeping the loop running

Code Example:

Python

Mnemonic: "SKIP Ahead" - Skip Keeping Iteration Process

Question 2(b) OR [4 marks]

What is the output of the following code:

Python

Answer:

Operation	Result	Explanation
`x*y`	`16`	Multiplication: 8 × 2 = 16
`x**y`	`64`	Exponentiation: 8² = 64
`x%y`	`0`	Modulo (remainder): 8 ÷ 2 = 4 with remainder 0
`x>y`	`True`	Comparison: 8 > 2 is True

Mnemonic: "MEMO" - Multiply, Exponent, Modulo, Operator comparison

Question 2(c) OR [7 marks]

Explain if-elif-else Ladder in python with its syntax, flowchart and with python code example.

Answer:

Syntax:

Python

Flowchart:

Code Example:

Python

Key Characteristics:

Sequential evaluation: Conditions checked from top to bottom
Exclusive execution: Only one block executes
Default action: Else block executes if no conditions are True

Mnemonic: "SEEP Logic" - Sequential Evaluation with Exclusive Path

Question 3(a) [3 marks]

Write a Python program to print odd numbers between 1 to 20 using loops.

Answer:

Python

Alternate approach:

Python

Mnemonic: "STEO" - Skip Two, Extract Odds

Question 3(b) [4 marks]

Explain Nested if statement in brief.

Answer:

Nested if Statement
An if statement inside another if statement
Allows for more complex conditional logic
Inner if only evaluated when outer if is True
Can have multiple levels of nesting

Code Example:

Python

Mnemonic: "LION" - Layered If-statements Operating Nested

Question 3(c) [7 marks]

Using a user-defined function write a Program to check entered number is an 'Armstrong number' or a palindrome in which number is passed as argument in calling function.

Answer:

Python

Armstrong Examples:

153: 1³ + 5³ + 3³ = 1 + 125 + 27 = 153 ✓
370: 3³ + 7³ + 0³ = 27 + 343 + 0 = 370 ✓

Palindrome Examples:

121: Same forward and backward ✓
123: Not same backward (321) ✗

Mnemonic: "APTEST" - Armstrong Palindrome Test Equal Sum Test

Question 3(a) OR [3 marks]

Write a python program to find sum of 1 to 100.

Answer:

Python

Mnemonic: "SUM Formula" - Sum Using Mathematical Formula

Question 3(b) OR [4 marks]

Write a python program to print the following pattern.

Answer:

Python

Pattern Logic:

Row 1: 1 number (1)
Row 2: 2 numbers (2, 3)
Row 3: 3 numbers (4, 5, 6)
Row 4: 4 numbers (7, 8, 9, 10)

Mnemonic: "CNIR" - Counter Number Increases with Rows

Question 3(c) OR [7 marks]

Write a Program using the function that reverses the entered value.

Answer:

Python

Alternate Method for Number Reversal:

Python

Mnemonic: "FLIP Digits" - Function Logic Inverts Position of Digits

Question 4(a) [3 marks]

Describe python math module with proper python code example.

Answer:

Python Math Module Features
Provides mathematical functions and constants
Includes trigonometric, logarithmic, and other functions
Contains mathematical constants like pi and e
Requires import before use

Code Example:

Python

Mnemonic: "CALM Operations" - Constants And Logarithmic Mathematical Operations

Question 4(b) [4 marks]

Write a python program that explains scope of variable.

Answer:

Python

Output:

Inside function - Global variable: I am global
Inside function - Local variable: I am local
Inside function - Shadowed global: I am local with global name
Outside function - Global variable: I am global

Mnemonic: "GLOVES" - Global Local Variable Encapsulation System

Question 4(c) [7 marks]

Explain List Methods and its built-in Functions

Answer:

Method/Function	Description	Example	Output
`append()`	Adds an element at the end	`fruits = ['apple']; fruits.append('banana'); print(fruits)`	`['apple', 'banana']`
`insert()`	Adds element at specified position	`nums = [1, 3]; nums.insert(1, 2); print(nums)`	`[1, 2, 3]`
`remove()`	Removes specified item	`colors = ['red', 'blue']; colors.remove('red'); print(colors)`	`['blue']`
`pop()`	Removes item at specified index	`letters = ['a', 'b', 'c']; x = letters.pop(1); print(x, letters)`	`b ['a', 'c']`
`clear()`	Removes all elements	`items = [1, 2]; items.clear(); print(items)`	`[]`
`len()`	Returns number of elements	`print(len([1, 2, 3]))`	`3`
`sorted()`	Returns sorted list	`print(sorted([3, 1, 2]))`	`[1, 2, 3]`
`max()/min()`	Returns max/min value	`print(max([5, 10, 3]), min([5, 10, 3]))`	`10 3`

Code Example:

Python

Mnemonic: "LISP Operations" - List Insert Sort Pop Operations

Question 4(a) OR [3 marks]

List out Python standard library mathematical functions.

Answer:

Mathematical Function	Description	Example
`abs()`	Returns absolute value	`abs(-5)` → `5`
`round()`	Rounds to nearest integer	`round(3.7)` → `4`
`max()`	Returns largest item	`max(1, 5, 3)` → `5`
`min()`	Returns smallest item	`min(1, 5, 3)` → `1`
`sum()`	Adds items of iterable	`sum([1, 2, 3])` → `6`
`pow()`	Returns x to power y	`pow(2, 3)` → `8`
`divmod()`	Returns quotient and remainder	`divmod(7, 2)` → `(3, 1)`

Additional from math module:

math.sqrt(): Square root
math.floor(): Rounds down
math.ceil(): Rounds up
math.factorial(): Factorial of a number
math.gcd(): Greatest common divisor

Mnemonic: "SMART Calculations" - Standard Mathematical Arithmetic Routines and Tools

Question 4(b) OR [4 marks]

Explain built in function in python.

Answer:

Built-in Functions in Python
Pre-defined functions available in Python without importing any module
Called directly without any prefix
Designed to perform common operations
Examples include print(), len(), type(), input(), range()

Categories with Examples:

Python

Mnemonic: "EPIC Functions" - Embedded Python Integrated Core Functions

Question 4(c) OR [7 marks]

Write a Python Program to count and display the number of vowels, consonants, uppercase, lowercase characters in a string.

Answer:

Python

Example:

Input: "Hello World!"
Output:
- Vowels: 3 (e, o, o)
- Consonants: 7 (H, l, l, W, r, l, d)
- Uppercase: 2 (H, W)
- Lowercase: 8 (e, l, l, o, o, r, l, d)

Mnemonic: "VOCAL Analysis" - Vowels Or Consonants And Letter case

Question 5(a) [3 marks]

Write a python code to swap given two elements in a list.

Answer:

Python

Mnemonic: "STEP Logic" - Swap Two Elements with Python Logic

Question 5(b) [4 marks]

Write a python Program to check if a substring is present in a given string.

Answer:

Python

Alternate method using find():

Python

Mnemonic: "FIND Method" - Find IN Directly with Methods

Question 5(c) [7 marks]

Explain tuple Operations, Functions and Methods

Answer:

Operation/Function/Method	Description	Example	Output
Creation	Create tuples with parentheses	`t = (1, 2, 3)`	`(1, 2, 3)`
Indexing	Access tuple elements	`t[1]`	`2`
Slicing	Get subset of tuple	`t[1:3]`	`(2, 3)`
Concatenation	Join two tuples	`(1, 2) + (3, 4)`	`(1, 2, 3, 4)`
Repetition	Repeat tuple elements	`(1, 2) * 2`	`(1, 2, 1, 2)`
Membership	Check if element exists	`3 in (1, 2, 3)`	`True`
len()	Get number of items	`len((1, 2, 3))`	`3`
min()/max()	Find min/max value	`min((3, 1, 2))`	`1`
count()	Count occurrences of value	`(1, 2, 1).count(1)`	`2`
index()	Find position of value	`(1, 2, 3).index(2)`	`1`
sorted()	Return sorted list from tuple	`sorted((3, 1, 2))`	`[1, 2, 3]`

Code Example:

Python

Mnemonic: "ICONS" - Immutable Collection Operations, Numbering, and Searching

Question 5(a) OR [3 marks]

Write a python program find the sum of elements in a list.

Answer:

Python

Mnemonic: "SALT" - Sum All List Together

Question 5(b) OR [4 marks]

Write a Program to demonstrate the set functions and operations.

Answer:

Python

Mnemonic: "COSI Methods" - Create, Operate, Search, Investigate with Set Methods

Question 5(c) OR [7 marks]

Write a Program to demonstrate the dictionaries functions and operations.

Answer:

Python

Key Operations:

Access: Using key or get() method
Modify: Assign new value to existing key
Add: Assign value to new key
Remove: Using pop(), popitem(), or del statement
Iterate: Through keys, values, or items

Mnemonic: "ACME Dictionary" - Access, Create, Modify, Extract from Dictionary