How should I practice In-Memory Key-Value Store Operations?

Start by reading the full statement, solve the visible examples, then compare the pattern against related OpenAI phone screen problems in FastPrep.

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Problem · Design

In-Memory Key-Value Store Operations

● Easy

OpenAIFULLTIMEPHONE SCREEN

Problem statement

Process a finite ordered sequence of operations on an in-memory key-value store. The store starts empty, keys are strings, and values are signed integers.

The problem statement continues

Pro

Examples

Example 1

operations = [["SET","a","1"],["GET","a"],["SET","a","-2"],["GET","a"],["DELETE","a"],["GET","a"],["DELETE","a"]]return = ["VALUE:1","VALUE:-2","true","NULL","false"]

The second SET overwrites a. The first deletion succeeds; afterward a is absent and another deletion returns false.

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