Ch.12 Solving Technical Problems and Choosing the Right Tool Procedure
Question

What is a good first troubleshooting sequence?

Tap to reveal answer
Deep dive

First troubleshooting sequence: define, reproduce, check changes, isolate, escalate

Define the problem, reproduce it, check recent changes, isolate variables, then escalate with evidence. The exam trap is jumping to escalation without isolating the variable first.

Learn more
Listen to this page (beta)

View all flashcards
(function(){ var players = document.querySelectorAll('[data-audio-captions][data-captions-url]'); var parseTimestamp = function(value) { var parts = value.trim().split(':'); var seconds = parts.pop() || '0'; var minutes = parts.pop() || '0'; var hours = parts.pop() || '0'; return (Number(hours) * 3600) + (Number(minutes) * 60) + Number(seconds.replace(',', '.')); }; var parseCues = function(text) { return text .replace(/\r/g, '') .split(/\n\n+/) .map(function(block) { return block.split('\n').filter(Boolean); }) .filter(function(lines) { return lines.length >= 2 && lines[0] !== 'WEBVTT'; }) .map(function(lines) { if (!lines[0].includes('-->')) { lines.shift(); } var timing = lines.shift() || ''; var parts = timing.split('-->').map(function(part) { return part.trim(); }); return { start: parseTimestamp(parts[0] || '0'), end: parseTimestamp(parts[1] || '0'), text: lines.join(' '), }; }) .filter(function(cue) { return Number.isFinite(cue.start) && Number.isFinite(cue.end) && cue.text !== ''; }); }; var findCue = function(cues, time) { return cues.find(function(cue) { return time >= cue.start && time < cue.end; }) || cues.find(function(cue) { return time < cue.start; }) || cues[cues.length - 1] || null; }; players.forEach(function(player) { var audio = player.querySelector('audio'); var output = player.querySelector('[data-audio-captions-output]'); if (!audio || !output) { return; } fetch(player.dataset.captionsUrl) .then(function(response) { return response.ok ? response.text() : ''; }) .then(function(text) { var cues = parseCues(text); var activeText = ''; var render = function() { var cue = findCue(cues, audio.currentTime); if (!cue || cue.text === activeText) { return; } activeText = cue.text; output.textContent = cue.text; }; render(); audio.addEventListener('timeupdate', render); audio.addEventListener('seeked', render); audio.addEventListener('play', render); }); }); })();