Q1. Coding Problem Easy

Topic: Expressions and Operators

Unit 1: Temperature Converter

Write a program that takes a temperature in Celsius as input (float) and converts it to Fahrenheit using the formula: $F = (C \times 9/5) + 32$ .

Input Format:

TEXT

25.0

Output Format:

TEXT

77.0

PYTHON

# Read input as float
celsius = float(input())

# Apply formula
fahrenheit = (celsius * 9/5) + 32

# Print result
print(fahrenheit)

Q2. Coding Problem Easy

Topic: Variables and Assignments

Unit 1: Variable Swapping

Write a program to swap two integer inputs without using a temporary variable (using Python's tuple assignment).

Input Format:

TEXT

10
20

Output Format:

TEXT

a: 20
b: 10

PYTHON

a = int(input())
b = int(input())

# Pythonic swap
a, b = b, a

print(f"a: {a}")
print(f"b: {b}")

Q3. Coding Problem Medium

Topic: Modulus and Floor Division

Unit 1: Time Converter

Write a program that takes a total number of minutes as input and converts it into Hours and Minutes using floor division (//) and modulus (%).

Input Format:

TEXT

Output Format:

TEXT

2 Hours and 10 Minutes

PYTHON

total_minutes = int(input())

# Floor division for hours
hours = total_minutes // 60

# Modulus for remaining minutes
minutes = total_minutes % 60

print(f"{hours} Hours and {minutes} Minutes")

Q4. Coding Problem Medium

Topic: String Operations

Unit 1: String Repetition and Concatenation

Write a program that takes a string word and a number n. Print the word repeated n times, followed by the string "!!!", all concatenated together.

Input Format:

TEXT

Go
3

Output Format:

TEXT

GoGoGo!!!

PYTHON

word = input()
n = int(input())

# String repetition using *
repeated = word * n

# Concatenation using +
result = repeated + "!!!"

print(result)

Q5. Coding Problem Easy

Topic: Conditional Statements

Unit 2: Leap Year Checker

Write a program that takes a year as input and checks if it is a leap year. A year is a leap year if it is divisible by 4, except for end-of-century years, which must be divisible by 400.

Input Format:

TEXT

Output Format:

TEXT

Leap Year

PYTHON

year = int(input())

if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
    print("Leap Year")
else:
    print("Not a Leap Year")

Q6. Coding Problem Medium

Topic: While Loops

Unit 2: Sum of Digits

Write a program using a while loop to calculate the sum of digits of a given integer.

Input Format:

TEXT

Output Format:

TEXT

PYTHON

num = int(input())
total = 0

while num > 0:
    digit = num % 10  # Extract last digit
    total += digit
    num = num // 10   # Remove last digit

print(total)

Q7. Coding Problem Medium

Topic: For Loops and Range

Unit 2: Prime Number Checker

Write a program that checks if a given number n is a prime number using a for loop.

Input Format:

TEXT

Output Format:

TEXT

Prime

PYTHON

n = int(input())

if n <= 1:
    print("Not Prime")
else:
    is_prime = True
    for i in range(2, int(n**0.5) + 1):
        if n % i == 0:
            is_prime = False
            break
    
    if is_prime:
        print("Prime")
    else:
        print("Not Prime")

Q8. Coding Problem Easy

Topic: Random Numbers

Unit 2: Random Dice Simulation

Write a program that simulates rolling a 6-sided die. Import the random module and print a random integer between 1 and 6 (inclusive).

Input Format:

TEXT

(No input)

Output Format:

TEXT

(Any number between 1 and 6, e.g., 4)

PYTHON

import random

# Generate random integer between 1 and 6 inclusive
roll = random.randint(1, 6)
print(roll)

Q9. Coding Problem Easy

Topic: Functions

Unit 3: Calculator Function

Define a function calculate(a, b, operator) that takes two numbers and a string operator ('+', '-', '*', '/') and returns the result. Handle division by zero by returning None.

Input Format:

TEXT

10
5
+

Output Format:

TEXT

PYTHON

def calculate(a, b, op):
    if op == '+':
        return a + b
    elif op == '-':
        return a - b
    elif op == '*':
        return a * b
    elif op == '/':
        if b == 0: return None
        return a / b
    else:
        return None

a = int(input())
b = int(input())
op = input()
print(calculate(a, b, op))

Q10. Coding Problem Medium

Topic: Recursion

Unit 3: Recursive Factorial

Write a recursive function factorial(n) that calculates the factorial of a number.

Input Format:

TEXT

Output Format:

TEXT

PYTHON

def factorial(n):
    # Base case
    if n == 0 or n == 1:
        return 1
    # Recursive case
    else:
        return n * factorial(n - 1)

n = int(input())
print(factorial(n))

Q11. Coding Problem Easy

Topic: Math Module

Unit 3: Hypotenuse Calculator

Write a function that uses math.sqrt and math.pow to calculate the length of the hypotenuse of a right triangle given sides a and b.

Input Format:

TEXT

3
4

Output Format:

TEXT

5.0

PYTHON

import math

def hypotenuse(a, b):
    # c = sqrt(a^2 + b^2)
    return math.sqrt(math.pow(a, 2) + math.pow(b, 2))

a = float(input())
b = float(input())
print(hypotenuse(a, b))

Q12. Coding Problem Medium

Topic: Arbitrary Arguments

Unit 3: Sum of Arbitrary Arguments

Write a function sum_all(*args) that takes any number of integer arguments and returns their sum.

Input Format:

TEXT

1 2 3 4 5

Output Format:

TEXT

PYTHON

def sum_all(*args):
    total = 0
    for num in args:
        total += num
    return total

# Reading input to pass to function
inputs = list(map(int, input().split()))
print(sum_all(*inputs))

Q13. Coding Problem Easy

Topic: Strings

Unit 4: Palindrome Check

Write a program that checks if a given string is a palindrome (reads the same forward and backward), ignoring case.

Input Format:

TEXT

Racecar

Output Format:

TEXT

True

PYTHON

s = input().lower()

# Check if string equals its reverse
if s == s[::-1]:
    print("True")
else:
    print("False")

Q14. Coding Problem Medium

Topic: Lists

Unit 4: Filter Even Numbers

Write a program that takes a list of integers and returns a new list containing only the even numbers, sorted in ascending order.

Input Format:

TEXT

9 2 5 4 8 1

Output Format:

TEXT

[2, 4, 8]

PYTHON

nums = list(map(int, input().split()))

# List comprehension to filter evens
evens = [x for x in nums if x % 2 == 0]

# Sort the result
evens.sort()
print(evens)

Q15. Coding Problem Medium

Topic: Dictionaries

Unit 4: Character Frequency

Write a program that counts the frequency of each character in a string and stores it in a dictionary.

Input Format:

TEXT

hello

Output Format:

TEXT

{'h': 1, 'e': 1, 'l': 2, 'o': 1}

PYTHON

s = input()
counts = {}

for char in s:
    counts[char] = counts.get(char, 0) + 1

print(counts)

Q16. Coding Problem Medium

Topic: Tuples

Unit 4: Tuple List Sort

Given a list of tuples where each tuple contains (name, age), write a program to sort the list by age (the second element).

Input Format (Hardcoded in solution for demo):

TEXT

[('Bob', 30), ('Alice', 25), ('Charlie', 35)]

Output Format:

TEXT

[('Alice', 25), ('Bob', 30), ('Charlie', 35)]

PYTHON

# Using lambda function for custom sort key
data = [('Bob', 30), ('Alice', 25), ('Charlie', 35)]

# Sort by index 1 (age)
data.sort(key=lambda x: x[1])

print(data)

Q17. Coding Problem Easy

Topic: Classes and Objects

Unit 5: Rectangle Class

Create a class Rectangle with an __init__ method that accepts length and width. Add a method area() that returns the area.

Input Format:

TEXT

10
5

Output Format:

TEXT

PYTHON

class Rectangle:
    def __init__(self, length, width):
        self.length = length
        self.width = width
    
    def area(self):
        return self.length * self.width

l = int(input())
w = int(input())

rect = Rectangle(l, w)
print(rect.area())

Q18. Coding Problem Medium

Topic: Encapsulation

Unit 5: Bank Account

Create a class Account with a private attribute __balance. Add methods deposit(amount) and get_balance(). Ensure deposit is positive.

Input Format:

TEXT

1000
500

Output Format:

TEXT

PYTHON

class Account:
    def __init__(self, start_balance):
        self.__balance = start_balance
        
    def deposit(self, amount):
        if amount > 0:
            self.__balance += amount
            
    def get_balance(self):
        return self.__balance

initial = int(input())
dep = int(input())

acc = Account(initial)
acc.deposit(dep)
print(acc.get_balance())

Q19. Coding Problem Medium

Topic: Inheritance

Unit 5: Animal Inheritance

Create a parent class Animal with a method speak() returning "Silence". Create a child class Dog that overrides speak() to return "Bark".

Input Format:

TEXT

(No input)

Output Format:

TEXT

Bark

PYTHON

class Animal:
    def speak(self):
        return "Silence"

class Dog(Animal):
    def speak(self):
        return "Bark"

d = Dog()
print(d.speak())

Q20. Coding Problem Easy

Topic: Polymorphism/Methods

Unit 5: Student Class

Create a Student class initialized with name and grades (a list). Add a method average_grade().

Input Format:

TEXT

Alice
80 90 100

Output Format:

TEXT

90.0

PYTHON

class Student:
    def __init__(self, name, grades):
        self.name = name
        self.grades = grades
    
    def average_grade(self):
        return sum(self.grades) / len(self.grades)

name = input()
grades = list(map(int, input().split()))

s = Student(name, grades)
print(s.average_grade())

Q21. Coding Problem Easy

Topic: Exception Handling

Unit 6: Safe Division

Write a program that takes two numbers as input and divides them. Use a try-except block to handle ZeroDivisionError and print "Cannot divide by zero".

Input Format:

TEXT

10
0

Output Format:

TEXT

Cannot divide by zero

PYTHON

try:
    a = int(input())
    b = int(input())
    print(a / b)
except ZeroDivisionError:
    print("Cannot divide by zero")
except ValueError:
    print("Invalid Input")

Q22. Coding Problem Medium

Topic: Regex

Unit 6: Extract Numbers

Write a program using the re module to find all integers in a given string and print them as a list of strings.

Input Format:

TEXT

Order 45 items for $200

Output Format:

TEXT

['45', '200']

PYTHON

import re

text = input()
# \d+ matches one or more digits
numbers = re.findall(r'\d+', text)
print(numbers)

Q23. Coding Problem Hard

Topic: Regex

Unit 6: Email Validation

Write a function using Regex to validate if an input string is a basic valid email address (contains characters, an @ symbol, domain, dot, and extension).

Input Format:

TEXT

test@example.com

Output Format:

TEXT

Valid

PYTHON

import re

def validate_email(email):
    pattern = r"^[\w\.-]+@[\w\.-]+\.\w+$"
    if re.match(pattern, email):
        return "Valid"
    else:
        return "Invalid"

email = input()
print(validate_email(email))

Q24. Coding Problem Medium

Topic: File Handling (Simulation)

Unit 6: File Write Simulation

Write a code block that opens a file named 'output.txt' in write mode, writes "Hello World" to it, and ensures the file is closed automatically using a context manager.

Input Format:

TEXT

(No input)

Output Format:

TEXT

(File output.txt created with content "Hello World")

PYTHON

# Using 'with' automatically closes the file
with open('output.txt', 'w') as f:
    f.write("Hello World")
    
# Verification code (optional for logic)
with open('output.txt', 'r') as f:
    print(f.read())

ETP Questions

Unit 1: Temperature Converter

Unit 1: Variable Swapping

Unit 1: Time Converter

Unit 1: String Repetition and Concatenation

Unit 2: Leap Year Checker

Unit 2: Sum of Digits

Unit 2: Prime Number Checker

Unit 2: Random Dice Simulation

Unit 3: Calculator Function

Unit 3: Recursive Factorial

Unit 3: Hypotenuse Calculator

Unit 3: Sum of Arbitrary Arguments

Unit 4: Palindrome Check

Unit 4: Filter Even Numbers

Unit 4: Character Frequency

Unit 4: Tuple List Sort

Unit 5: Rectangle Class

Unit 5: Bank Account

Unit 5: Animal Inheritance

Unit 5: Student Class

Unit 6: Safe Division

Unit 6: Extract Numbers

Unit 6: Email Validation

Unit 6: File Write Simulation