Category: AG Quiz

This is a regular “data quiz”. Follow it on LinkedIn. Test your knowledge or learn something new. Today Question: Which format is binary and compressed? A) JSON  B) CSV  C) Avro  D) XML Correct Answer: C Explanation Avro is a binary data format designed for efficient storage and transfer. It supports compression and schema evolution, allowing changes to the data structure without breaking existing files. Unlike…

his is a regular “data quiz”. Follow it on LinkedIn. Test your knowledge or learn something new. Today Question: In Python, @staticmethod is used to: A) Decorate  B) Call without instance  C) Privatize  D) Inherit Correct Answer: B Explanation @staticmethod marks a class method that can be called without creating an instance. It does not receive self or class and is isolated from object or class state. It…

his is a regular “data quiz”. Follow it on LinkedIn. Test your knowledge or learn something new. Today Question: Which library is used for stream processing in Spark? A) SparkSQL  B) SparkStreaming  C) MLlib  D) GraphX Correct Answer: B Explanation Spark Streaming is the Apache Spark library for real-time stream processing. It supports data streams from Kafka, Flume, sockets, and other sources, and provides APIs through DStreams or Structured…

This is a regular “data quiz”. Follow it on LinkedIn. Test your knowledge or learn something new. Today Question: “Lazy evaluation” in Spark means: A) Immediate execution  B) Execution only when an action is triggered  C) Batch processing  D) Stream processing Correct Answer: B Explanation Lazy evaluation in Apache Spark means that transformations on RDDs or DataFrames are not executed immediately. They are evaluated only when an action like count(), collect(), or save() is…

This is a regular “data quiz”. Follow it on LinkedIn. Test your knowledge or learn something new. Today Question: A Spark DataFrame is processed? A) In RAM  B) In a database  C) On disk  D) In a browser Correct Answer: A Explanation A Spark DataFrame is a data abstraction in Apache Spark that processes data in memory for faster operations on large datasets. Spark distributes data across cluster nodes and executes…

This is a regular “data quiz”. Follow it on LinkedIn. Test your knowledge or learn something new. Today Question: Which command loads a CSV into a DataFrame? A) pd.open()  B) pd.read_csv()  C) pd.load()  D) pd.get_csv() Correct Answer: B Explanation The pd.read_csv() command in pandas loads a CSV file into a DataFrame, a table-like data structure. It supports parameters for delimiters, encoding, indexes, column types, and handling missing values.…

This is a regular “data quiz”. Follow it on LinkedIn. Test your knowledge or learn something new. Today Question: In Python, the pandas library is used for: A) Web scraping  B) DataFrames  C) Machine learning  D) API calls Correct Answer: B Explanation Pandas is a Python library for data manipulation and analysis using DataFrames. It provides tools for reading and writing data from CSV, Excel, SQL databases, filtering, aggregation, transformation, and…

This is a regular “data quiz”. Follow it on LinkedIn. Test your knowledge or learn something new. Today Question: Which of these services is a data warehouse? A) Athena  B) Redshift  C) S3  D) Glue Correct Answer: B Explanation Amazon Redshift is a fully managed cloud data warehouse optimized for analytical queries on large datasets. It supports complex SQL queries, BI integrations, and analytics pipelines. Athena is a…

This is a regular “data quiz”. Follow it on LinkedIn. Test your knowledge or learn something new. Today Question: Which tool monitors cloud metrics? A) CloudWatch  B) Grafana  C) Prometheus  D) All Correct Answer: D Explanation Cloud metrics can be monitored using several tools. AWS CloudWatch provides metrics and logs for AWS services with alarms and automated actions. Grafana is a visualization platform often used…

This is a regular “data quiz”. Follow it on LinkedIn. Test your knowledge or learn something new. Today Question: Which property guarantees long-term data persistence in the cloud? A) Durability  B) Availability C) Scalability D) Elasticity Correct Answer: A Explanation Durability in the cloud refers to the system’s ability to preserve data without loss even in the event of hardware failures, network outages, or other incidents. Cloud providers achieve…