“Lua Scripting” in Information Technology

17 questions across 1 technology.

Information Technology

17 questions in 1 technology

#	Question	Technology	Topic	Level
1	Why would you use a Lua script with Redis instead of just sending several separate commands from your application? Redis › Lua Scripting	Redis	Lua Scripting	Beginner
2	How do you pass keys and other arguments into a Lua script when executing it with the EVAL command? Redis › Lua Scripting	Redis	Lua Scripting	Beginner
3	How do you call other Redis commands from within a Lua script, and what restrictions apply to this? Redis › Lua Scripting	Redis	Lua Scripting	Intermediate
4	How do you manage and organize Lua scripts in a larger application to keep them maintainable as your codebase grows? Redis › Lua Scripting	Redis	Lua Scripting	Intermediate
5	How would you write a Lua script to implement an atomic rate limiter that checks and increments a request counter in a single operation? Redis › Lua Scripting	Redis	Lua Scripting	Advanced
6	What are the performance and blocking implications of running a Lua script in Redis, especially for a script that takes a long time to execute? Redis › Lua Scripting	Redis	Lua Scripting	Advanced
7	What is the difference between EVAL and EVALSHA, and why would you use EVALSHA in a production application? Redis › Lua Scripting	Redis	Lua Scripting	Intermediate
8	When would you choose a Lua script over a MULTI and EXEC transaction to achieve atomicity in Redis? Redis › Transactions	Redis	Transactions	Advanced
9	What is rate limiting, and why is Redis a good fit for implementing it? Redis › Rate Limiting with Redis	Redis	Rate Limiting with Redis	Beginner
10	How do you implement a basic fixed window rate limiter using Redis's INCR and EXPIRE commands? Redis › Rate Limiting with Redis	Redis	Rate Limiting with Redis	Beginner
11	What is a Redis transaction, and how do the MULTI and EXEC commands work together to create one? Redis › Transactions	Redis	Transactions	Beginner
12	How do you cancel a queued Redis transaction before it executes, and what command is used for this? Redis › Transactions	Redis	Transactions	Beginner
13	Why is it important to release a distributed lock using a script that verifies you are actually the current lock owner, rather than a simple DELETE command? Redis › Distributed Locks with Redis	Redis	Distributed Locks with Redis	Intermediate
14	What is the token bucket algorithm for rate limiting, and what advantage does it offer over a simple fixed window counter? Redis › Rate Limiting with Redis	Redis	Rate Limiting with Redis	Intermediate
15	What does it mean for Redis transactions to lack full rollback support, and how does this differ from transactions in a traditional relational database? Redis › Transactions	Redis	Transactions	Intermediate
16	How would you design a distributed lock implementation that supports safely extending the lock's expiration time if the protected operation needs more time than originally expected? Redis › Distributed Locks with Redis	Redis	Distributed Locks with Redis	Advanced
17	How would you design a tiered rate limiting system that applies different limits based on a user's subscription plan? Redis › Rate Limiting with Redis	Redis	Rate Limiting with Redis	Advanced