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Real Dev

Free interactive coding practice for students and developers. SQL, DSA, Python and more. From the Schoolabe team.

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Why SQL NOT IN returns no rows when the column has NULL
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Why SQL NOT IN returns no rows when the column has NULL

#sql #beginners #database #interview
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4 min read
Python's mutable default argument bug, run one call at a time
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Python's mutable default argument bug, run one call at a time

#python #beginners #programming #debugging
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4 min read
A 30-Day DSA Plan for Placements, Built Around Patterns (Not Problem Counts)
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A 30-Day DSA Plan for Placements, Built Around Patterns (Not Problem Counts)

#dsa #algorithms #python #career
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5 min read
I Added a Fourth Shard in Python and 75% of the Keys Moved
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I Added a Fourth Shard in Python and 75% of the Keys Moved

#systemdesign #python #distributedsystems #interview
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6 min read
The Python Copy Bug That Looks Fine in Code Review
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The Python Copy Bug That Looks Fine in Code Review

#python #interview #beginners #programming
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4 min read
Belady's Anomaly: FIFO vs LRU vs Optimal, Checked in Python
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Belady's Anomaly: FIFO vs LRU vs Optimal, Checked in Python

#gate #operatingsystems #python #computerscience
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5 min read
SQL Joins Explained with One Tiny Dataset (Plus 5 Interview Questions)
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SQL Joins Explained with One Tiny Dataset (Plus 5 Interview Questions)

#sql #database #beginners #interview
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5 min read
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