What is the main purpose of a data backup?
A Recover information after loss
B Improve screen brightness
C Increase internet speed
D Update device drivers
Answer: A. Recover information after loss. A backup provides a copy that can be used after accidental deletion, corruption, or device failure.
Which backup type copies all selected data each time?
A Incremental backup
B Differential backup
C Temporary cache
D Full backup
Answer: D. Full backup. A full backup copies the selected data set during each run.
What does an incremental backup usually copy?
A Everything since last full only
B Only the operating system
C Changes since the last backup
D Files that never changed
Answer: C. Changes since the last backup. Incremental backups capture changes since the most recent backup in the chain.
What does a differential backup usually include?
A Changes since the last increment
B Changes since the last full
C Only deleted files
D Only system settings
Answer: B. Changes since the last full. A differential backup accumulates changes made since the latest full backup.
Why can incremental backups need a longer restore chain?
A Several restore sets
B They always contain every file
C They cannot be encrypted
D They delete the full backup
Answer: A. Several restore sets. Restoring may require the full backup and each later incremental set.
What is a benefit of differential backups during restoration?
A They use no storage
B They require no full backup
C They never change after creation
D Fewer sets may be needed
Answer: D. Fewer sets may be needed. A differential restore generally needs the last full backup and the latest differential.
What does the 3-2-1 backup guideline suggest?
A Three passwords for two users
B One copy on three laptops
C Three copies across two media
D Two copies in one folder
Answer: C. Three copies across two media. The guideline recommends multiple copies, different storage media, and an off-site copy.
Why keep one backup copy offline?
A Offline drives sync faster
B Ransomware may reach connected copies
C It removes testing
D It increases internet speed
Answer: B. Ransomware may reach connected copies. Disconnected copies are harder for malware to reach over a network.
What is an off-site backup useful for?
A Recovery after a local disaster
B Faster keyboard typing
C Lower screen resolution
D Updating a router
Answer: A. Recovery after a local disaster. An off-site copy can survive events that damage the primary location.
What does immutable backup storage aim to prevent?
A File compression
B Authorized restores
C Backup scheduling
D Changes or deletion during retention
Answer: D. Changes or deletion during retention. Immutability helps prevent alteration or deletion during a defined retention period.
Why encrypt backup files?
A It guarantees recovery
B It increases storage capacity
C They may contain sensitive data
D It prevents every hardware fault
Answer: C. They may contain sensitive data. Encryption helps protect private information if backup media or accounts are exposed.
Where should a backup encryption key be kept?
A Inside the unencrypted backup
B Separately and securely
C In a public note
D Only in the device name
Answer: B. Separately and securely. A separate protected key copy is needed to restore encrypted data.
What is the Recovery Point Objective?
A Maximum tolerable data loss
B Maximum system downtime
C Number of backup copies
D Time to encrypt a file
Answer: A. Maximum tolerable data loss. RPO describes the point in time to which data must be recoverable, indicating allowable data loss.
What is the Recovery Time Objective?
A Maximum backup file size
B Number of copied folders
C Time between passwords
D Target time to restore service
Answer: D. Target time to restore service. RTO is the target duration for restoring service after disruption.
How should backup frequency be chosen?
A Use the slowest schedule
B Back up only after failure
C Match change rate and risk
D Avoid critical information
Answer: C. Match change rate and risk. Frequent changes and low tolerance for data loss call for more frequent backups.
Why test a backup by restoring files?
A To create more cloud quota
B To verify recovery works
C To increase the backup speed
D To avoid setting retention
Answer: B. To verify recovery works. A successful backup job does not prove that files can be restored correctly.
What is a checksum useful for in backup verification?
A Detecting data changes or corruption
B Changing file permissions
C Encrypting the network
D Naming backup folders
Answer: A. Detecting data changes or corruption. Checksums can help identify whether data differs from its expected value.
What does backup retention define?
A How quickly a router connects
B Who owns the laptop
C The file's screen position
D How long copies are kept
Answer: D. How long copies are kept. A retention policy specifies how long backup versions are preserved.
Why keep multiple backup generations?
A They always reduce cost
B They make restores instant
C Older versions may help
D They prevent every deletion
Answer: C. Older versions may help. Multiple versions can help recover from corruption or malware that went unnoticed.
How does file versioning help recovery?
A It replaces every backup
B It restores an earlier revision
C It encrypts a shared folder
D It copies files to RAM
Answer: B. It restores an earlier revision. Version history can recover prior file content when supported and retained.
What is a risk of relying only on file synchronization?
A Deletion may propagate everywhere
B Sync always makes off-site copies
C Sync never changes files
D Cloud accounts cannot be lost
Answer: A. Deletion may propagate everywhere. Synchronization is designed to propagate changes and may replicate deletions.
Which backup storage is more isolated from a ransomware-infected PC?
A A permanently mounted drive
B A shared network folder
C A synced desktop folder
D A disconnected external drive
Answer: D. A disconnected external drive. An unplugged drive is less directly accessible to ransomware than continuously connected storage.
What does a recovery drive typically help restore?
A Every personal document
B All browser passwords
C System recovery files
D A cloud account's billing
Answer: C. System recovery files. A recovery drive can help repair or restore a system but may not include personal files.
Why should system recovery media be tested?
A It guarantees every file survived
B Media may be outdated
C It reduces the backup schedule
D It replaces off-site copies
Answer: B. Media may be outdated. Testing confirms recovery media can boot and perform the intended procedure.
What is file-level recovery intended to restore?
A Specific files or folders
B An entire site network
C All device firmware
D The cloud provider account
Answer: A. Specific files or folders. File-level restore recovers selected items without rebuilding the whole system.
What is bare-metal recovery designed for?
A Restoring one text paragraph
B Recovering a single browser tab
C Changing the router password
D Rebuilding a whole system
Answer: D. Rebuilding a whole system. Bare-metal recovery aims to restore an entire machine, including its operating environment.
Why coordinate backups with database applications?
A Databases never change
B Applications prevent all errors
C Data must be consistent
D Backups need no storage
Answer: C. Data must be consistent. Application-aware methods help ensure database files are captured consistently.
What can an uncoordinated database file copy cause?
A A faster restore
B An inconsistent backup
C More storage capacity
D A stronger password
Answer: B. An inconsistent backup. Copying active database files without coordination can produce an unusable or inconsistent copy.
What does backup compression do?
A Reduces stored data size
B Encrypts every file
C Verifies recovery steps
D Stops ransomware automatically
Answer: A. Reduces stored data size. Compression can reduce space requirements but uses processing resources.
What does deduplication reduce?
A Backup encryption keys
B Restore testing
C The number of recovery users
D Repeated stored data blocks
Answer: D. Repeated stored data blocks. Deduplication stores repeated data patterns more efficiently.
Why exclude temporary files from some backups?
A They contain every password
B They are always irreplaceable
C They can be recreated
D They stop encryption
Answer: C. They can be recreated. Excluding reproducible temporary data can save space if it is not needed for recovery.
Which files should usually receive backup priority?
A Public installer downloads
B Unique and critical information
C Temporary thumbnails only
D Empty folders
Answer: B. Unique and critical information. Prioritize irreplaceable files and information needed to resume essential work.
What is a common reason to back up device settings?
A Restore configuration after replacement
B Increase device memory
C Change internet speed
D Remove duplicate accounts
Answer: A. Restore configuration after replacement. Settings backups can make it easier to configure a replacement device.
Why keep a copy away from the original device?
A It makes files smaller
B It disables cloud sharing
C It prevents software updates
D Device loss or damage
Answer: D. Device loss or damage. A separate location reduces dependence on one device or physical site.
What should be done before replacing a device?
A Delete every recovery method
B Turn off encryption
C Confirm a recent backup exists
D Share the account password
Answer: C. Confirm a recent backup exists. Check backup status and recovery access before transferring or erasing a device.
How can a cloud backup fail to restore?
A Cloud data never changes
B Access or quota may fail
C Backups cannot be encrypted
D Screen lock is enabled
Answer: B. Access or quota may fail. Restores may depend on account access, service availability, storage, and backup configuration.
Why retain a local backup alongside a cloud copy?
A It adds another recovery route
B It guarantees internet access
C It prevents all malware
D It removes restore testing
Answer: A. It adds another recovery route. Separate locations can provide resilience if one account or service is unavailable.
What should be recorded in a backup log?
A Wallpaper color and font
B Every personal password
C The device's screen size
D Date, scope, and result
Answer: D. Date, scope, and result. Logs help show what was backed up, when, and whether the job succeeded.
Why review backup alerts promptly?
A Alerts use more storage
B They change account names
C A failed job leaves gaps
D They reduce system performance
Answer: C. A failed job leaves gaps. A failed backup can leave important data without a recent recovery copy.
What is a backup restore test meant to prove?
A Every file is public
B Recovery works as expected
C Storage quotas are unlimited
D The system has no risks
Answer: B. Recovery works as expected. Restore tests validate the process and the usability of recovered data.
Why keep backup software updated?
A Updates may fix security flaws
B It always shortens recovery time
C It creates more files
D It prevents every hardware failure
Answer: A. Updates may fix security flaws. Backup tools can contain vulnerabilities and should be maintained like other software.
How can large backups affect a network?
A They increase battery health
B They reduce file permissions
C They change screen resolution
D They may consume bandwidth
Answer: D. They may consume bandwidth. Large transfers can slow other network activity, so scheduling may matter.
Why is a separate backup account sometimes useful?
A It speeds up every restore
B It removes encryption needs
C It limits shared credentials
D It guarantees unlimited storage
Answer: C. It limits shared credentials. Separate credentials can reduce exposure if a primary account is compromised.
What should be verified before using a backup provider?
A The service logo
B Recovery, encryption, and retention
C A social media rating
D The desktop background
Answer: B. Recovery, encryption, and retention. Understand restore methods, data protection, and how long copies remain available.
How does an offline backup differ from an online backup?
A It is disconnected from networks
B It always stores less data
C It cannot be encrypted
D It requires no physical media
Answer: A. It is disconnected from networks. Offline storage is not continuously accessible over a network.
What is a safe step after ransomware is suspected?
A Reconnect every backup drive
B Delete all incident evidence
C Restore all devices together
D Disconnect affected systems and escalate
Answer: D. Disconnect affected systems and escalate. Protect unaffected backups and follow incident response before beginning recovery.
Why should restoration order be planned?
A All files restore instantly
B Order changes encryption
C Some services depend on others
D Backups cannot include software
Answer: C. Some services depend on others. Prioritize systems and data needed to bring essential operations back.
What can a backup policy clarify?
A The laptop's wallpaper
B Owners, timing, and recovery steps
C A user's favorite apps
D The printer's color mode
Answer: B. Owners, timing, and recovery steps. A policy documents responsibilities, schedules, retention, and recovery procedures.
What is a limitation of System Restore?
A No personal file backup
B It restores every deleted document
C It copies files off-site
D It replaces all device backups
Answer: A. No personal file backup. Microsoft distinguishes System Restore for system changes from backups of personal files.
Which approach best protects critical data?
A One synced folder only
B A single unverified USB drive
C An online recycle bin
D Encrypted, isolated, tested copies
Answer: D. Encrypted, isolated, tested copies. Multiple current copies with isolation and restore testing improve recovery readiness.