Missiora
Backup & Recovery

Technology Fundamentals

Backup & Recovery

1 min readPublished 22 Jul 2026

Track your progress. Sign in to mark this guide complete and build your Job Readiness Score.

Data is only as safe as your last tested backup. Backup and recovery protect against failure, error and ransomware.

The essentials

  • Backup types: full (everything), incremental (changes since the last backup) and differential (changes since the last full) — combined for efficiency.
  • Point-in-time recovery uses backups plus transaction logs to restore to an exact moment (e.g. just before a bad DELETE).
  • RPO (Recovery Point Objective) — how much data you can afford to lose; RTO (Recovery Time Objective) — how quickly you must be back.
  • The golden rule: a backup you haven't tested restoring is not a backup. Store copies off-site/offline to survive ransomware.

This connects to resilience in the cloud.

Interview Intelligence

How this topic actually shows up in interviews — and how to demonstrate you understand it.

Why employers ask about this

Recoverability is a core responsibility; employers want people who take it seriously.

Technical questions
Explain RPO and RTO with an example.+

RPO = acceptable data loss (e.g. 15 min of transactions); RTO = acceptable downtime (e.g. back in 1 hour).

Behavioural questions
Tell me about preparing for something going wrong.+

Show planning, testing recovery and reducing risk before an incident.

Real-world scenarios
“A bad DELETE ran in production this morning.”+

Expected answer: Use point-in-time recovery to restore to just before it, having verified backups are tested and current.

Practise in AI Interview™Rehearse these questions, scored.Plan with Career Coach™A personalised path to your goal.Evidence it in Career Passport™Prove this skill to employers.

Employability Intelligence

Where this knowledge takes you — the jobs, skills and certifications it feeds into.

Relevant roles
Database AdministratorData EngineerSite Reliability Engineer
Skills you're proving
BackupsRecoveryRPO/RTO
Recommended certifications
Microsoft DP-900 (Data Fundamentals)Oracle / SQL certifications
Career progression

Databases & SQL → DBA/SRE roles.

What employers expect

That you can design a sensible schema and write correct, efficient SQL.

Frequently asked questions

What is the difference between RPO and RTO?

RPO is how much data you can afford to lose; RTO is how quickly you must recover.

What is point-in-time recovery?

Restoring a database to an exact moment using a backup plus transaction logs.

Why test your backups?

An untested backup may be corrupt or incomplete; only a tested restore proves you can recover.

Related guides

Databases & SQL Fundamentals: Design, Query & Manage DataRelational Databases & SQL FundamentalsDatabase Design & NormalizationPrimary Keys, Foreign Keys & Relationships

Practise what you've learned

Turn this guide into real, evidenced progress

Missiora helps you measure, improve and evidence the capabilities employers actually value — start with the tools best suited to this topic.

M
Published by
Missiora

Missiora is an AI Employability Intelligence platform. Our resources are researched and reviewed by the Missiora team to help you measure, improve and prove your career readiness.

All resources