PRP411 Practice Questions

Write a program that checks whether a given number is positive, negative, or zero.

Answer explanation

To check if a number is positive, negative, or zero, use conditional statements. If the number is greater than zero, it's positive; if less than zero, it's negative; if equal to zero, it's zero.

Write a program that calculates the average of all numbers in a list.

Answer explanation

To calculate the average, sum all numbers in the list and divide by the count of numbers. This can be done using built-in functions like sum() and len() in Python.

Write a program that prints all the even numbers from 1 to 50 using a for loop.

Answer explanation

To print even numbers from 1 to 50, use a for loop that iterates through numbers 1 to 50. Check if each number is even by using the modulus operator (%). If the number % 2 equals 0, print it.

Write a program that takes a sentence as input and counts how many words it contains.

Answer explanation

To count the words in a sentence, split the string by spaces and filter out any empty strings. The length of the resulting list gives the word count.

Write a program that creates a text file named example.txt, writes a few lines to it, and then reads and prints the content.

Answer explanation

To create 'example.txt', use file handling in Python: open the file in write mode, write lines, then close it. To read, open the file in read mode, read the content, and print it. This demonstrates basic file operations.

Write a program that prints a multiplication table 10.

Answer explanation

To print a multiplication table for 10, use a loop that iterates from 1 to 10, multiplying each number by 10 and printing the result. This will display the products of 10 with numbers 1 through 10.

Write a program that stores student names and their scores in a dictionary. Then, allow the user to input a name and display the corresponding score if it exists.

Answer explanation

Create a dictionary to store names as keys and scores as values. Use input() to get a name from the user, then check if it exists in the dictionary. If it does, print the corresponding score.

Write a program that asks the user for a number and divides 100 by that number. Use try and except to handle division by zero or invalid input.

Answer explanation

The program should prompt for a number, then use try-except to catch ZeroDivisionError for division by zero and ValueError for invalid input. This ensures the program handles errors gracefully without crashing.

Write a program using list comprehension to create a list of squares of numbers from 1 to 10.

Answer explanation

Use list comprehension to generate squares: [x**2 for x in range(1, 11)]. This iterates through numbers 1 to 10, squaring each, and creates a list of their squares.

Write a Python script to print a dictionary where the keys are numbers between 1 and 10 (both included) and the values are the cubes of the keys.

Answer explanation

The script uses a dictionary comprehension to iterate over numbers 1 to 10, calculating the cube of each number (key) and storing it as the value. This results in a dictionary where keys are numbers and values are their cubes.