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What is the difference between a list and a tuple?

/* * Function that emulates requesting data from backend. * Backend has RPS limitation, and will fail, * if parallel requests number is more than MAX_PARALLEL_REQUESTS. */ function requestData(id: number): Promise<string> { parallelRequests++; if (parallelRequests > MAX_PARALLEL_REQUESTS) { throw new Error("Too many parallel requests"); } return new Promise((res) => { setTimeout(() => { parallelRequests--; return res(`${id * 2}`); }, Math.floor(Math.random() * 2000)) }); } function prepareData( ids: number[], maxParallelRequests: number, ): Promise<string[]> { /* * TODO: implement requesting all data, * using no more than maxParallelRequests * parallel connections. */ }