Tag: big_data_interview
Converting delimiter-separated strings to array columns using PySpark
PySpark allows for a seamless and efficient way to handle big data processing and manipulation tasks. In this article, we…
Spark’s cluster connectivity issues – AppClient$ClientActor – SparkDeploySchedulerBackend – TaskSchedulerImpl
Apache Spark, a powerful tool for distributed computing, occasionally confronts users with connectivity and cluster health issues. Among them, the…
Navigating Hadoop’s start-all.sh Connection refused’ challenge: Causes and resolutions
Hadoop, a popular framework for distributed storage and processing, frequently confronts newcomers and sometimes even experienced users with errors that…
Resolving the Task Not Serializable error in PySpark : org.apache.spark.SparkException: Job aborted due to stage failure – Resolution
When we use PySpark to run operations on a distributed cluster, it divides the tasks across multiple nodes. In order…
Extracting minutes from timestamp in Google BigQuery and handling in PySpark
Often in data analytics, there’s a need to extract specific parts of a date or timestamp for more granular analysis….
Advanced grouping and aggregation operations on DataFrames in PySpark
In this article, we will explore one of the lesser-known yet incredibly useful features of PySpark: grouping_id. We will cover…
Analyzing User rankings over time using PySpark’s RANK and LAG Functions
Understanding shifts in user rankings based on their transactional behavior provides valuable insights into user trends and preferences. Utilizing the…
Step-by-step guide on executing PySpark code from Snowflake Snowpark to read a DataFrame:
Here are the steps on how to execute PySpark code from Snowflake Snowpark to read a DataFrame: 1. Open Snowsight…
RDBMS vs. Hadoop: Comparing Data Management Giants
Both RDBMS (Relational Database Management System) and Hadoop are crucial components of the data management landscape, but they serve very…
PySpark : When are new Stages created in the Spark DAG?
Apache Spark’s computational model is based on a Directed Acyclic Graph (DAG). When you perform operations on a DataFrame or…
