📚 Data Science Riddle
You train a CNN for image classification but loss stops decreasing early. What's your next step?
You train a CNN for image classification but loss stops decreasing early. What's your next step?
Anonymous Quiz
19%
Reduce batch size
42%
Increase learning rate a bit
22%
Add Dropout
16%
Reduce layers
❤1🤝1
⚡ Parallelism In Databricks ⚡
1️⃣ DEFINITION
Parallelism = running many tasks 🏃♂️🏃♀️ at the same time
(instead of one by one 🐢).
In Databricks (via Apache Spark), data is split into
📦 partitions, and each partition is processed
simultaneously across worker nodes 💻💻💻.
2️⃣ KEY CONCEPTS
🔹 Partition = one chunk of data 📦
🔹 Task = work done on a partition 🛠️
🔹 Stage = group of tasks that run in parallel ⚙️
🔹 Job = complete action (made of stages + tasks) 📊
3️⃣ HOW IT WORKS
✅ Step 1: Dataset ➡️ divided into partitions 📦📦📦
✅ Step 2: Each partition ➡️ assigned to a worker 💻
✅ Step 3: Workers run tasks in parallel ⏩
✅ Step 4: Results ➡️ combined into final output 🎯
4️⃣ EXAMPLES
# Increase parallelism by repartitioning
df = spark.read.csv("/data/huge_file.csv")
df = df.repartition(200) # ⚡ 200 parallel tasks
# Spark DataFrame ops run in parallel by default 🚀
result = df.groupBy("category").count()
# Parallelize small Python objects 📂
rdd = spark.sparkContext.parallelize(range(1000), numSlices=50)
rdd.map(lambda x: x * 2).collect()
# Parallel workflows in Jobs UI ⚡
# Independent tasks = run at the same time.
5️⃣ BEST PRACTICES
⚖️ Balance partitions → not too few, not too many
📉 Avoid data skew → partitions should be even
🗃️ Cache data if reused often
💪 Scale cluster → more workers = more parallelism
====================================================
📌 SUMMARY
Parallelism in Databricks = split data 📦 →
assign tasks 🛠️ → run them at the same time ⏩ →
faster results 🚀
1️⃣ DEFINITION
Parallelism = running many tasks 🏃♂️🏃♀️ at the same time
(instead of one by one 🐢).
In Databricks (via Apache Spark), data is split into
📦 partitions, and each partition is processed
simultaneously across worker nodes 💻💻💻.
2️⃣ KEY CONCEPTS
🔹 Partition = one chunk of data 📦
🔹 Task = work done on a partition 🛠️
🔹 Stage = group of tasks that run in parallel ⚙️
🔹 Job = complete action (made of stages + tasks) 📊
3️⃣ HOW IT WORKS
✅ Step 1: Dataset ➡️ divided into partitions 📦📦📦
✅ Step 2: Each partition ➡️ assigned to a worker 💻
✅ Step 3: Workers run tasks in parallel ⏩
✅ Step 4: Results ➡️ combined into final output 🎯
4️⃣ EXAMPLES
# Increase parallelism by repartitioning
df = spark.read.csv("/data/huge_file.csv")
df = df.repartition(200) # ⚡ 200 parallel tasks
# Spark DataFrame ops run in parallel by default 🚀
result = df.groupBy("category").count()
# Parallelize small Python objects 📂
rdd = spark.sparkContext.parallelize(range(1000), numSlices=50)
rdd.map(lambda x: x * 2).collect()
# Parallel workflows in Jobs UI ⚡
# Independent tasks = run at the same time.
5️⃣ BEST PRACTICES
⚖️ Balance partitions → not too few, not too many
📉 Avoid data skew → partitions should be even
🗃️ Cache data if reused often
💪 Scale cluster → more workers = more parallelism
====================================================
📌 SUMMARY
Parallelism in Databricks = split data 📦 →
assign tasks 🛠️ → run them at the same time ⏩ →
faster results 🚀
❤5
📚 Data Science Riddle
In A/B testing, why is random assignment of users essential?
In A/B testing, why is random assignment of users essential?
Anonymous Quiz
9%
To reduce experiment time
78%
To ensure groups are unbiased
7%
To increase conversion rate
6%
To simplify analysis
❤3
📚 Data Science Riddle
Why is data versioning(e.g., DVC, LakeFS) essential in ML workflows?
Why is data versioning(e.g., DVC, LakeFS) essential in ML workflows?
Anonymous Quiz
11%
It speeds up training
41%
It helps reproduce experiments
19%
It stores backups
29%
It tracks model metrics
Classification Vs Regression By Bigdata Specialist.pdf
3.6 MB
Latest post from our Instagram page, saved as PDF ☝️
You can also find it here: https://www.instagram.com/p/DQJrbCaDBpy/
You can also find it here: https://www.instagram.com/p/DQJrbCaDBpy/
❤3👏2
📚 Data Science Riddle
Why is data validation before model training critical in production ML systems?
Why is data validation before model training critical in production ML systems?
Anonymous Quiz
25%
It prevents model drift
24%
It ensures pipeline reproducibility
39%
It catches bad data early
12%
It improves training speed
❤3
Conceptual Modeling For ETL Processes.pdf
460.5 KB
Discusses Modeling ETL workflows for data warehousing, including data sources and transformations, from Drexel University.
❤5
📚 Data Science Riddle
During EDA(Explanatory Data Analysis), what's the main reason we use box plots?
During EDA(Explanatory Data Analysis), what's the main reason we use box plots?
Anonymous Quiz
22%
To visualize distributions
64%
To detect outliers
9%
To see correlations
5%
To test normality
❤5
Hey everyone 👋
Some time ago, I asked if I should start a Data Science educational series and since 96% of you said yes, I began creating it.
But many of you also asked for real, hands-on experience with projects, not just lessons. So I decided to shift gears. It’s now becoming a full practical coding course! 💻
My goal is to help you build skills that get you job-ready, not just teach theory. It’s taking a bit longer, but I promise it’ll be worth it.
Thank you all for your support and patience ❤️
I’ll let you know as soon as we’re ready to start!
Some time ago, I asked if I should start a Data Science educational series and since 96% of you said yes, I began creating it.
But many of you also asked for real, hands-on experience with projects, not just lessons. So I decided to shift gears. It’s now becoming a full practical coding course! 💻
My goal is to help you build skills that get you job-ready, not just teach theory. It’s taking a bit longer, but I promise it’ll be worth it.
Thank you all for your support and patience ❤️
I’ll let you know as soon as we’re ready to start!
❤21👍3🥰1
📚 Data Science Riddle
Your batch ETL job runs slower each week despite no code change. What's your first suspect?
Your batch ETL job runs slower each week despite no code change. What's your first suspect?
Anonymous Quiz
12%
Code inefficiency
20%
Schema mismatch
61%
Data volume growth
7%
Resource throttling
🚨 When & How Jupyter Notebooks Fail (And What To Use Instead)
Hey Data Folks! 👩💻👨💻
Let’s talk about Jupyter Notebooks — powerful for exploration, but risky in production. Here’s why:
❌ Problems with Notebooks:
1. Out-of-order execution → hidden bugs.
2. Code changes after execution → inconsistent results.
3. Data leakage → sensitive info in outputs.
4. Security risks → tokens/keys exposed.
5. Hard to apply engineering practices → no modular code, testing, CI/CD.
6. Collaboration pain → merge conflicts, JSON issues.
7. Reproducibility issues → missing dependencies, versions.
✅ When They’re Useful:
- Quick data exploration & prototyping.
- Knowledge sharing (clean, runnable from top to bottom).
- Teaching / hands-on tutorials (with solution notebooks).
🔧 What to Use Instead:
- For production code → .py files + IDEs.
- For workflows → template repos & reproducible setups.
- For deployment → MLOps tools, pipelines, automation.
💡 Key Takeaways:
- Use notebooks for exploration & teaching.
- Use structured code + pipelines for production & deployment.
- Always document dependencies, keep notebooks clean, never commit secrets!
Hey Data Folks! 👩💻👨💻
Let’s talk about Jupyter Notebooks — powerful for exploration, but risky in production. Here’s why:
❌ Problems with Notebooks:
1. Out-of-order execution → hidden bugs.
2. Code changes after execution → inconsistent results.
3. Data leakage → sensitive info in outputs.
4. Security risks → tokens/keys exposed.
5. Hard to apply engineering practices → no modular code, testing, CI/CD.
6. Collaboration pain → merge conflicts, JSON issues.
7. Reproducibility issues → missing dependencies, versions.
✅ When They’re Useful:
- Quick data exploration & prototyping.
- Knowledge sharing (clean, runnable from top to bottom).
- Teaching / hands-on tutorials (with solution notebooks).
🔧 What to Use Instead:
- For production code → .py files + IDEs.
- For workflows → template repos & reproducible setups.
- For deployment → MLOps tools, pipelines, automation.
💡 Key Takeaways:
- Use notebooks for exploration & teaching.
- Use structured code + pipelines for production & deployment.
- Always document dependencies, keep notebooks clean, never commit secrets!
❤6👍2
List of AI Project Ideas 👨🏻💻
Beginner Projects
🔹 Sentiment Analyzer
🔹 Image Classifier
🔹 Spam Detection System
🔹 Face Detection
🔹 Chatbot (Rule-based)
🔹 Movie Recommendation System
🔹 Handwritten Digit Recognition
🔹 Speech-to-Text Converter
🔹 AI-Powered Calculator
🔹 AI Hangman Game
Intermediate Projects
🔸 AI Virtual Assistant
🔸 Fake News Detector
🔸 Music Genre Classification
🔸 AI Resume Screener
🔸 Style Transfer App
🔸 Real-Time Object Detection
🔸 Chatbot with Memory
🔸 Autocorrect Tool
🔸 Face Recognition Attendance System
🔸 AI Sudoku Solver
Advanced Projects
🔺 AI Stock Predictor
🔺 AI Writer (GPT-based)
🔺 AI-powered Resume Builder
🔺 Deepfake Generator
🔺 AI Lawyer Assistant
🔺 AI-Powered Medical Diagnosis
🔺 AI-based Game Bot
🔺 Custom Voice Cloning
🔺 Multi-modal AI App
🔺 AI Research Paper Summarizer
Beginner Projects
🔹 Sentiment Analyzer
🔹 Image Classifier
🔹 Spam Detection System
🔹 Face Detection
🔹 Chatbot (Rule-based)
🔹 Movie Recommendation System
🔹 Handwritten Digit Recognition
🔹 Speech-to-Text Converter
🔹 AI-Powered Calculator
🔹 AI Hangman Game
Intermediate Projects
🔸 AI Virtual Assistant
🔸 Fake News Detector
🔸 Music Genre Classification
🔸 AI Resume Screener
🔸 Style Transfer App
🔸 Real-Time Object Detection
🔸 Chatbot with Memory
🔸 Autocorrect Tool
🔸 Face Recognition Attendance System
🔸 AI Sudoku Solver
Advanced Projects
🔺 AI Stock Predictor
🔺 AI Writer (GPT-based)
🔺 AI-powered Resume Builder
🔺 Deepfake Generator
🔺 AI Lawyer Assistant
🔺 AI-Powered Medical Diagnosis
🔺 AI-based Game Bot
🔺 Custom Voice Cloning
🔺 Multi-modal AI App
🔺 AI Research Paper Summarizer
❤9👏1