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Chapter 1: What is DevOps?: Cards

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Revision cards

Why do we need DevOps?. Slow, manual releases mean bugs wait months for a fix and deploy nights are scary.
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Lesson: 1.1 Why do we need DevOps?

What does Operations mean?. Code is useless until it runs somewhere reliably for users.
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Lesson: 1.2 What does “operations” mean? (say it simply)

The problem: dev vs ops fight. When goals clash, releases get blocked and outages turn into blame.
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Lesson: 1.3 What is the problem? Suppose we are…

How DevOps answers the fight. Talking alone doesn't fix it; the work itself must be shared and automated.
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Lesson: 1.4 How DevOps answers that same fight

CALMS: five ideas in plain English. DevOps is fuzzy; CALMS gives a simple checklist.
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Lesson: 1.5 CALMS — five ideas in plain English

CI vs CD vs Deploy vs Release. These four words get mixed up in interviews and meetings.
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Lesson: 1.6 CI vs CD vs deploy vs release

Tools beginners learn first. There are hundreds of tools; beginners get lost.
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Lesson: 1.7 Tools beginners learn first

Roles you see in job posts. Job titles overlap and confuse students.
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Lesson: 1.8 Roles students see in job posts

Common DevOps misconceptions. Wrong ideas lead to wrong answers and bad setups.
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Lesson: 1.9 Common misconceptions

A day in the life: junior DevOps. Students don't know what the job looks like day to day.
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Lesson: 1.10 A day in the life — junior DevOps (story)

Where this course fits beside AWS. Students wonder whether to learn cloud or DevOps first.
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Lesson: 1.11 Where this course fits beside AWS

Interview cards

Why do companies need DevOps? To ship small changes often and safely, instead of big risky releases, by making dev and ops work as one team with automation.
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Lesson: 1.1 Why do we need DevOps?

What does Operations do? Ops runs the software: keeps servers up, monitors health, handles incidents and backups.
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Lesson: 1.2 What does “operations” mean? (say it simply)

What problem does DevOps solve? The conflict between dev (change fast) and ops (stay stable), which causes slow releases and blame.
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Lesson: 1.3 What is the problem? Suppose we are…

How does DevOps remove the dev-ops wall? By shared ownership (you build it, you help run it) and automation (pipelines, infrastructure as code).
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Lesson: 1.4 How DevOps answers that same fight

What is CALMS? Culture, Automation, Lean, Measurement, Sharing: a framework to explain and assess DevOps.
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Lesson: 1.5 CALMS — five ideas in plain English

Difference between deploy and release? Deploy = code is on production servers. Release = users can use the feature. You can deploy without releasing.
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Lesson: 1.6 CI vs CD vs deploy vs release

Which DevOps tools would you learn first, and why? Git and Linux first (everything uses them), then Docker, a CI tool, then Kubernetes and Terraform.
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Lesson: 1.7 Tools beginners learn first

DevOps engineer vs SRE? DevOps engineer: builds pipelines and automation. SRE: owns reliability with targets (SLOs) and error budgets.
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Lesson: 1.8 Roles students see in job posts

Is DevOps a tool or a role? Neither alone: it's a way of working (culture and practices) supported by tools; companies also hire for it.
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Lesson: 1.9 Common misconceptions

What does a junior DevOps engineer do daily? Fixes failed pipelines, writes small scripts, reviews changes, watches alerts and learns from incidents.
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Lesson: 1.10 A day in the life — junior DevOps (story)

How do AWS and DevOps relate? AWS provides infrastructure; DevOps practices and tools build, test and deploy onto it automatically.
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Lesson: 1.11 Where this course fits beside AWS

Comparison cards

Deploy vs Release. Deploy: put new code on production servers.Release: let users actually use the new feature.
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Lesson: 1.6 CI vs CD vs deploy vs release

DevOps Engineer vs SRE. DevOps engineer: builds pipelines and automation for teams.SRE (Site Reliability Engineer): keeps services reliable using targets.
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Lesson: 1.8 Roles students see in job posts

AWS vs DevOps. AWS: a cloud provider renting servers, storage and services.DevOps: a way of working to build, test and ship software.
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Lesson: 1.11 Where this course fits beside AWS