👇25 blogs to guide you through every important concept 👇1. Data Lake vs Data Warehouse→ https://lnkd.in/gEpmTyMS2. Delta Lake Architecture→ https://lnkd.in/gk5x5uqR3. Medallion Architecture→ https://lnkd.in/gmyMpVpT4. ETL vs ELT→ https://lnkd.in/gvg3hgqe5. Apache Airflow Basics→ https://lnkd.in/gGwkvCXd6. DAG Design Patterns→ https://lnkd.in/gHTKQWyR7. dbt Core Explained→ https://lnkd.in/g5mQi8-y8. Incremental Models in dbt→ https://lnkd.in/gS25HCez9. Spark Transformations vs Actions→ https://lnkd.in/g2RRCGMW10. Partitioning in Spark→ https://lnkd.in/g5fXjSJD11. Window Functions... Continue Reading →
Pyspark SQL Cheatsheet
Here's a PySpark SQL cheatsheet, covering common operations and concepts. This is designed to be a quick reference for those working with PySpark DataFrames and SQL-like operations.PySpark SQL Cheatsheet1. Initialization & Data Loadingfrom pyspark.sql import SparkSessionfrom pyspark.sql.functions import *from pyspark.sql.types import *# Initialize SparkSessionspark = SparkSession.builder \ .appName("PySparkSQLCheatsheet") \ .getOrCreate()# Load Data (e.g., CSV, Parquet)df_csv... Continue Reading →
Cloud Operations Architecture Interview Questions
Provide detailed answers with scenario for below questionsCloud Operations Architecture Interview Questions:1. How would you implement Infrastructure as Code (IaC) in a cloud environment?Scenario: Using Terraform to manage AWS resources, enabling version control and reusable configurations.2. Describe your approach to cost optimization in cloud solutions.Scenario: Using AWS Cost Explorer to identify underutilized resources and implement... Continue Reading →
Big Data Engineering Interview series-1
**Top Big Data Interview Questions (2024) - Detailed Answers**1. **What is Hadoop and how does it work?** Hadoop is an open-source framework designed for distributed storage and processing of large datasets across clusters of computers. It consists of two main components: Hadoop Distributed File System (HDFS) for fault-tolerant storage, which splits data into blocks... Continue Reading →
Hadoop vs. Spark
Comparison table between Hadoop and Spark: FeatureHadoopSparkCore ComponentsHDFS (Hadoop Distributed File System): A distributed storage system for storing large datasets.MapReduce: A computational model for parallel data processing, operating in a series of map and reduce steps.RDD (Resilient Distributed Datasets): A fault-tolerant collection of elements distributed across a cluster.Spark Core: The core processing engine that provides... Continue Reading →
Data migration from DB2 to Azure Data Lake Storage
Below is an example PySpark script to load data from a DB2 table into an Azure Data Lake table. The script is optimized for handling high-volume data efficiently by leveraging Spark's distributed computing capabilities.Prerequisites:Spark Configuration: Ensure Spark is configured with the necessary dependencies:spark-sql-connector for Azure Data Lake Gen2. db2jcc driver for connecting to DB2.Azure Authentication:... Continue Reading →
Pyspark Syntax Cheat Sheet
Quickstart Install on macOS: brew install apache-spark && pip install pyspark Create your first DataFrame: from pyspark.sql import SparkSession spark = SparkSession.builder.getOrCreate() # I/O options: https://spark.apache.org/docs/latest/api/python/reference/pyspark.sql/io.html df = spark.read.csv('/path/to/your/input/file') Basics # Show a preview df.show() # Show preview of first / last n rows df.head(5) df.tail(5) # Show preview as JSON (WARNING: in-memory) df =... Continue Reading →
Azure Data Engineer Journey Learning links
Start your Azure journey here.....1. Azure Data Factory.https://lnkd.in/gEmpbyrMProject: https://lnkd.in/gFG2aCgy2. Azure Data bricks.https://lnkd.in/gvFwKxaNproject: https://lnkd.in/gFG2aCgy3. Azure Stream Analytics.https://lnkd.in/g35VbSTv4. Azure Synapse Analytics.https://lnkd.in/gCufskNC5. Azure Data Lake Storage.https://lnkd.in/gcEKjWsc6. Azure SQL database.https://lnkd.in/gmHxqxQX7. Azure Postgres SQL database.https://lnkd.in/grHWJvWZ8. Azure MariaDB.https://lnkd.in/gYSp7MZi9. Azure Cosmos DB.https://lnkd.in/g6jPZA36This is an excellent guide to become azure data engineer. No need to become expert. but learn how to work with... Continue Reading →
Low Level System design articles
These articles will save you 50+ hours of hopping to resources and wasting time. 1) Scalability: https://lnkd.in/gq4hW9qx 2) Horizontal vs Vertical Scaling: https://lnkd.in/g8qcwRCy 3) Latency vs Throughput: https://lnkd.in/gDAx6QQd 4) Load Balancing: https://lnkd.in/gefSiXEJ 5) Caching: https://lnkd.in/gAp-9udf 6) ACID Transactions: https://lnkd.in/g-sjsMwX 7) SQL vs NoSQL: https://lnkd.in/gwCe58TU 8) Database Indexes: https://lnkd.in/gE_q5m_g 9) Database Sharding: https://lnkd.in/gFdNxDrU 10) Content Delivery... Continue Reading →
100 Latest Azure Interview Questions
BASIC AZURE INTERVIEW QUESTIONS AND ANSWERS 1. What is Azure and how does it work? Azure is a cloud computing platform managed by Microsoft. It offers services and tools for building, deploying, and managing applications and services in the cloud. The Azure services can be accessed through the internet. These include virtual machines, databases, storage,... Continue Reading →
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