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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Intro to Containers Fact or Fiction (2025)</title>
<link rel="preconnect" href="https://fonts.gstatic.com" />
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--brand:#2563eb; --brand-2:#22c55e; --good:#16a34a; --bad:#dc2626;
--card:#ffffffcc;
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radial-gradient(1200px 600px at 80% 0%, var(--bg2), transparent 60%),
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min-height: 100vh;
display: flex;
flex-direction: column;
align-items: center;
justify-content: flex-start;
padding: 2rem 1rem;
color: var(--ink);
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h1 { text-align: center; margin-bottom: .25rem; font-weight: 600; font-size: 2.2rem; }
#subtitle { text-align:center; margin-bottom:1rem; color: var(--ink-sub); }
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</style>
</head>
<body>
<h1>Intro to Containers Fact or Fiction</h1>
<div id="subtitle">Test your 2025 knowledge of Containers, Docker, and Kubernetes</div>
<div id="source-link">
Source: <a href="https://www.linkedin.com/pulse/concept-containers-michael-lively-n1rae/" target="_blank" rel="noopener">
Introduction to Containers, Docker, and Kubernetes (LinkedIn)
</a>
</div>
<div id="game-container" role="region" aria-label="Fact or Fiction game">
<div class="progress-container" aria-hidden="true"><div class="progress-bar" id="progress-bar"></div></div>
<div id="statement" aria-live="polite">Loading statement...</div>
<div class="btn-group">
<button onclick="guess(true)" aria-label="Choose Fact">Fact</button>
<button class="secondary" onclick="guess(false)" aria-label="Choose Fiction">Fiction</button>
</div>
<div id="result" role="status" aria-live="polite"></div>
<div id="explanation"></div>
<div id="controls">
<button id="next-btn" style="display:none;" onclick="nextStatement()">Next</button>
<button id="restart-btn" style="display:none;" onclick="startGame()">Restart</button>
</div>
<div id="score" aria-live="polite"></div>
</div>
<script>
// 12 statements (6 Fact, 6 Fiction) reflecting 2025 realities
const statements = [
// ===== FACTS (6) =====
{
text: "Containers share the host operating system kernel instead of bundling a full guest OS.",
isFact: true,
explanation: "Fact. Containers virtualize at the OS layer, which keeps them lightweight and fast to start."
},
{
text: "Docker’s 2013 release popularized containerization by standardizing images and registries for developers.",
isFact: true,
explanation: "Fact. Docker democratized packaging and distribution via images and registries."
},
{
text: "Kubernetes (introduced in 2014) is the de facto standard for orchestrating containers at scale.",
isFact: true,
explanation: "Fact. K8s handles scheduling, scaling, rollouts, and self-healing across clusters."
},
{
text: "Modern Kubernetes clusters run with OCI-compatible runtimes like containerd or CRI-O, not Docker Engine.",
isFact: true,
explanation: "Fact. Dockershim was removed; K8s uses CRI runtimes such as containerd/CRI-O."
},
{
text: "OCI standards improve interoperability for images and artifacts, including SBOMs and signatures.",
isFact: true,
explanation: "Fact. OCI Image/Artifact specs let registries store images, SBOMs, and signatures consistently."
},
{
text: "Rootless options like Podman, plus strong policies and signing (e.g., cosign), are common 2025 security practices.",
isFact: true,
explanation: "Fact. Least privilege, rootless, SBOMs, and signing are part of modern supply-chain security."
},
// ===== FICTIONS (6) =====
{
text: "Containers always include a complete guest operating system, just like virtual machines.",
isFact: false,
explanation: "Fiction. Containers share the host kernel; VMs package a full OS per instance."
},
{
text: "Kubernetes is itself a container runtime, so you don’t need containerd or CRI-O anymore.",
isFact: false,
explanation: "Fiction. Kubernetes is an orchestrator and relies on a CRI-compatible runtime underneath."
},
{
text: "In 2025, Docker Engine is the default runtime under Kubernetes for production clusters.",
isFact: false,
explanation: "Fiction. Since the dockershim removal, production K8s uses containerd or CRI-O."
},
{
text: "OpenTelemetry has fully replaced all observability tools and is already a graduated CNCF project.",
isFact: false,
explanation: "Fiction. OTel is the de facto standard for telemetry formats, but it has not replaced all tools and has not historically been fully graduated."
},
{
text: "WebAssembly (Wasm) has completely replaced containers for cloud workloads.",
isFact: false,
explanation: "Fiction. Wasm is growing and complementary; it hasn’t replaced containers."
},
{
text: "Containers are a poor fit for hybrid or multi-cloud because they lack portability.",
isFact: false,
explanation: "Fiction. Portability is one of containers’ biggest strengths across on-prem, cloud, and edge."
}
];
// Game logic (shuffle, progress, scoring)
let currentIndex = 0, score = 0, answered = false;
function shuffle(arr) {
for (let i = arr.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[arr[i], arr[j]] = [arr[j], arr[i]];
}
}
function startGame() {
shuffle(statements);
currentIndex = 0; score = 0; answered = false;
document.getElementById('restart-btn').style.display = 'none';
loadStatement(); updateScore();
}
function loadStatement() {
if (currentIndex >= statements.length) return endGame();
const s = statements[currentIndex];
document.getElementById('statement').textContent = s.text;
const resultEl = document.getElementById('result');
resultEl.style.display = 'none';
resultEl.textContent = '';
resultEl.className = '';
document.getElementById('explanation').style.display = 'none';
document.getElementById('next-btn').style.display = 'none';
answered = false; updateProgress();
}
function guess(isFactGuess) {
if (answered) return;
answered = true;
const correct = statements[currentIndex].isFact;
const resultEl = document.getElementById('result');
if (isFactGuess === correct) {
resultEl.textContent = 'Correct!';
resultEl.className = 'correct';
score++;
} else {
resultEl.textContent = 'Incorrect!';
resultEl.className = 'incorrect';
}
resultEl.style.display = 'block';
const expEl = document.getElementById('explanation');
expEl.textContent = statements[currentIndex].explanation + " (See source link above.)";
expEl.style.display = 'block';
document.getElementById('next-btn').style.display = 'inline-block';
updateScore();
}
function nextStatement() {
currentIndex++;
if (currentIndex < statements.length) loadStatement();
else endGame();
}
function updateScore() {
document.getElementById('score').textContent = `Score: ${score} / ${statements.length}`;
}
function updateProgress() {
const pct = Math.round((currentIndex / statements.length) * 100);
document.getElementById('progress-bar').style.width = pct + '%';
}
function endGame() {
const pct = Math.round((score / statements.length) * 100);
document.getElementById('statement').textContent =
`Game Over! You scored ${score} of ${statements.length} (${pct}%).`;
document.getElementById('result').style.display = 'none';
document.getElementById('explanation').style.display = 'none';
document.getElementById('next-btn').style.display = 'none';
document.getElementById('restart-btn').style.display = 'inline-block';
document.getElementById('progress-bar').style.width = '100%';
}
startGame();
</script>
</body>
</html>
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