IT Career Guides & Free Resources
Expert roadmaps, tutorials, salary guides and interview prep across Data Science, Generative AI, Python, Cloud & Analytics — written by GloryTecks trainers in Hyderabad.
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Parquet vs ORC vs Avro: File Formats Compared
How Parquet, ORC and Avro differ and when to use each: row-based versus columnar layouts, the same 500,000 real taxi trips written as CSV, Avro, Parquet and ORC with measured file sizes, how much of a Parquet file one column occupies, schema evolution, splitting, and a choice guide.
Python File Handling: Reading and Writing Files
Everything you need to read and write files reliably in Python: what each open() mode does, why you should always pass an encoding, reading big files line by line, pathlib for paths and folders, writing without destroying the old file if something fails, and handling the errors files actually raise.