Data Access · interview question

What is the healthiest performance judgment around basic sqlite queries?

Multiple choiceMediumchapter-11-curatedpremiumdata-accessbasic-sqlite-queries

python

import sqlite3

connection = sqlite3.connect("orders.db")
rows = connection.execute("SELECT id, subtotal_cents FROM orders").fetchall()

Measure before optimizing, then change the part that actually dominates cost instead of guessing from style alone.Delay clarity until production traffic reveals the edge case and then patch it under pressure.Keep basic sqlite queries implicit so the script stays short and hope the next engineer infers the rule.Solve the symptom with comments only and avoid changing the code shape around basic sqlite queries.

Answer and explanation

Correct answer

A. Measure before optimizing, then change the part that actually dominates cost instead of guessing from style alone.

Why

Premature optimization is usually weaker than targeted optimization backed by measurement.

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What is the healthiest performance judgment around basic sqlite queries?

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