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ISC2 CC Practice Question: Business Continuity, Disaster Recovery, and Incident Response
An organization is implementing backup strategies. Which THREE are characteristics of differential backups? (Select THREE)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Requires only the last full backup and the latest differential backup for a full restore
Differential backups copy all changes since the last full backup, making them medium-sized and faster to restore than incremental, but slower to back up than incremental.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Backup time is generally faster than incremental backups
Why it's wrong here
Differential backs up more data over time, becoming slower than incremental.
- ✗
Requires all differential backups since the last full backup for a full restore
Why it's wrong here
Only the latest differential is needed, not all.
- ✓
Requires only the last full backup and the latest differential backup for a full restore
Why this is correct
Only two sets needed: full and latest differential.
- ✓
Backs up all data changed since the last full backup
Why this is correct
This is the definition of differential backup.
- ✓
Restore time is generally faster than incremental backups
Why this is correct
Because only full + one differential are needed, restore is faster.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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