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This exam covers fundamental concepts of Python programming including variables, data types, control structures, and functions. Key topics include the use of operators, loops, and conditionals, as well as data structures…
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Write a Python program to print all prime numbers between 1 and 50 using a for loop, and explain the logic step by step.
Program: for num in range(2, 51): if all(num % i != 0 for i in range(2, int(num**0.5)+1)): print(num); Logic: check divisibility.
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Explain the logical operators (and, or, not) in Python with suitable examples. Also write a Python program to check whether a person is eligible to vote, given their age and citizenship status, using logical operators.
Operators: 'and': both true, 'or': at least one true, 'not': negates. Program: if age >= 18 and citizenship == 'Yes': print('Eligible') ...
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Write a Python program to accept a string from the user and use a for loop to count and display the number of vowels, consonants, digits and spaces present in it. Also explain the logic used.
Program: for char in string: if char in 'aeiou': count_vowels += 1; Logic: check each character type.
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Explain lists and dictionaries in Python with suitable examples. Also write a Python program to create a dictionary containing student names and marks, and display the names of students who scored more than 60 marks.
Lists: ordered, e.g., [1, 2]; Dictionaries: key-value, e.g., {'Alice': 70}; Program: for name, mark in dict.items(): if mark > 60: print(name) ...
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Explain Python basic data types and operators with suitable examples. Also write a Python program to design a basic calculator that supports addition, subtraction, multiplication and division.
Data types: int, float, str; Operators: +, -, *, /. Program: num1 = float(input()), num2 = float(input()), result = num1 + num2 ...
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Differentiate between the '/' (true division) and '//' (floor division) operators in Python. Also write a Python program to accept the marks obtained by a student (out of 100) and print the grade using if-elif-else based on: ≥90 A, ≥75 B, ≥60 C, ≥40 D, otherwise Fail.
'/': returns float, '//': returns integer. Program: marks = int(input()), if marks >= 90: print('A') ...
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Differentiate between if-elif-else and nested if statements, with a suitable example for each. Also write a Python program using nested for loops to print the multiplication tables from 1 to 5 (each table from 1 to 10).
if-elif-else: checks multiple conditions; nested if: checks conditions within conditions. Program: for i in range(1, 6): for j in range(1, 11): print(i*j) ...
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Explain the difference between a simple for loop (iterating directly over a sequence) and a for loop using the range() function. Also write a Python program to create a list of numbers and use a for loop to display the largest, smallest and sum of its elements.
Simple for: iterates over elements; range(): iterates over indices. Program: nums = [1, 2, 3]; print(max(nums), min(nums), sum(nums)) ...
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Define a variable in Python. Give one valid and one invalid variable name.
A variable in Python is a name that refers to a value. Valid: var1, Invalid: 1var.
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Predict the output of the following code: x = 17, y = 5, print(x % y, x // y)
Output: 2 3
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Differentiate between a list and a dictionary in Python. Give one example of each.
List: ordered collection, e.g., [1, 2, 3]; Dictionary: key-value pairs, e.g., {'a': 1, 'b': 2}.
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Explain the role of indentation in defining a Python block. Identify the error in: if 3 > 1: print("Yes")
Indentation defines code blocks; error: 'print' must be indented.
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Trace and write the output of the following code: for i in range(2, 10, 3): print(i)
Output: 2 5 8
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