Python Data Science Jobs & Interviews
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Your go-to hub for Python and Data Scienceโ€”featuring questions, answers, quizzes, and interview tips to sharpen your skills and boost your career in the data-driven world.

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Python Question / Quiz;

What is the output of the following Python code, and why? ๐Ÿค”๐Ÿš€ Comment your answers below! ๐Ÿ‘‡

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Python Question / Quiz;

What is the output of the following Python code, and why? ๐Ÿค”๐Ÿš€ Comment your answers below! ๐Ÿ‘‡

#python #programming #developer #programmer #coding #coder #softwaredeveloper #computerscience #webdev #webdeveloper #webdevelopment #pythonprogramming #pythonquiz #ai #ml #machinelearning #datascience

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Python Question / Quiz;

What is the output of the following Python code, and why? ๐Ÿค”๐Ÿš€ Comment your answers below! ๐Ÿ‘‡

#python #programming #developer #programmer #coding #coder #softwaredeveloper #computerscience #webdev #webdeveloper #webdevelopment #pythonprogramming

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Python Question / Quiz;

What is the output of the following Python code, and why? ๐Ÿค”๐Ÿš€ Comment your answers below! ๐Ÿ‘‡

#python #programming #developer #programmer #coding #coder #softwaredeveloper #computerscience #webdev #webdeveloper #webdevelopment #pythonprogramming

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What will be the output of the following code?

import numpy as np
numbers = np.array([1, 2, 3])
new_numbers = numbers + 1
print(new_numbers.tolist())


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Python Question / Quiz;

What is the output of the following Python code, and why? ๐Ÿค”๐Ÿš€ Comment your answers below! ๐Ÿ‘‡

#python #programming #developer #programmer #coding #coder #softwaredeveloper #computerscience #webdev #webdeveloper #webdevelopment #pythonprogramming #pythonquiz #ai #ml #machinelearning #datascience

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Python Question / Quiz;

What is the output of the following Python code, and why? ๐Ÿค”๐Ÿš€ Comment your answers below! ๐Ÿ‘‡

#python #programming #developer #programmer #coding #coder #softwaredeveloper #computerscience #webdev #webdeveloper #webdevelopment #pythonprogramming

https://t.iss.one/DataScienceQ
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๐Ÿš€ Comprehensive Guide: How to Prepare for a Python Job Interview โ€“ 200 Most Common Interview Questions

Are you ready: https://hackmd.io/@husseinsheikho/Python-interviews

#PythonInterview #JobPrep #PythonQuestions #CodingInterview #DataStructures #Algorithms #OOP #WebDevelopment #MachineLearning #DevOps

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1. What is the primary purpose of PHP?
2. How do you declare a variable in PHP?
3. Which symbol starts a PHP code block?
4. What is the difference between echo and print in PHP?
5. How do you create an array in PHP?
6. Which function is used to get the length of a string in PHP?
7. What is the use of the isset() function in PHP?
8. How do you handle form data in PHP?
9. What does the $_GET superglobal contain?
10. How can you include another PHP file in your script?
11. What is the purpose of the require_once statement?
12. How do you define a function in PHP?
13. What is the difference between == and === in PHP?
14. How do you connect to a MySQL database using PHP?
15. Which function executes a SQL query in PHP?
16. What is the use of the mysqli_fetch_assoc() function?
17. How do you start a session in PHP?
18. What is the purpose of the session_start() function?
19. How do you redirect a user to another page in PHP?
20. What is the use of the header() function in PHP?

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Question:
How can you use Pythonโ€™s asyncio and concurrent.futures to efficiently handle both I/O-bound and CPU-bound tasks in a single application, and what are the best practices for structuring such a system?

Answer:
To efficiently handle both I/O-bound (e.g., network requests, file I/O) and CPU-bound (e.g., data processing, math operations) tasks in Python, you should combine asyncio for I/O-bound work and concurrent.futures.ThreadPoolExecutor or ProcessPoolExecutor for CPU-bound tasks. This avoids blocking the event loop and maximizes performance.

Hereโ€™s an example:

import asyncio
import time
from concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor
import aiohttp
import requests

# Simulated I/O-bound task (e.g., API call)
async def fetch_url(session, url):
try:
async with session.get(url) as response:
return await response.text()
except Exception as e:
return f"Error: {e}"

# Simulated CPU-bound task (e.g., heavy computation)
def cpu_intensive_task(n):
return sum(i * i for i in range(n))

# Main function using asyncio + thread/process pools
async def main():
# I/O-bound tasks with asyncio
urls = [
"https://httpbin.org/json",
"https://httpbin.org/headers",
"https://httpbin.org/status/200"
]

# Use aiohttp for concurrent HTTP requests
async with aiohttp.ClientSession() as session:
tasks = [fetch_url(session, url) for url in urls]
results = await asyncio.gather(*tasks)

print("I/O-bound results:", results)

# CPU-bound tasks with ProcessPoolExecutor
with ProcessPoolExecutor() as executor:
# Run CPU-intensive work in separate processes
futures = [executor.submit(cpu_intensive_task, 1000000) for _ in range(3)]
cpu_results = [future.result() for future in futures]

print("CPU-bound results:", cpu_results)

# Run the async main function
if __name__ == "__main__":
asyncio.run(main())

Explanation:
- asyncio handles I/O-bound tasks asynchronously without blocking the main thread.
- aiohttp is used for efficient HTTP requests.
- ProcessPoolExecutor runs CPU-heavy functions in separate processes (bypassing GIL).
- Mixing both ensures optimal resource usage: async for I/O, multiprocessing for CPU.

Best practices:
- Use ThreadPoolExecutor for light I/O or blocking code.
- Use ProcessPoolExecutor for CPU-intensive work.
- Avoid mixing async and blocking code directly โ€” always offload CPU tasks.
- Use asyncio.gather() to run multiple coroutines concurrently.

#Python #AsyncIO #Concurrency #Multithreading #Multiprocessing #AdvancedPython #Programming #WebDevelopment #Performance

By: @DataScienceQ ๐Ÿš€
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