Exam SY0-601 topic 1 question 285 discussion

The correct answer here is to use differential backup. When using this type of back up, there are two alternatives: 1 - Something bricks on the day of the full backup, you need only that full backup to restore your system. 2 - Something bricks after the day when a full backup is conducted. In that case you only need two things, the full backup and the most recent differential backup. With incremental you need your full backup followed by every single backup made since then till the point of failiure.

I'm choosing E. Difference between differential and incremental: Backup: Differential - backs up only the files that changed since the last full backup Incremental - backs up the files that changed since the latest backup (whether the last one was incremental or full) Data restoration: Differential - you'll only need the latest differential back up Incremental - you'll need every incremental backup that was done

Option E, "Full backups followed by differential backups," can also be a valid backup strategy to minimize the number of backups that need to be restored in case of data loss. With this strategy, a full backup of all the data is performed initially. Subsequently, differential backups are taken at regular intervals, capturing all the changes or updates made since the last full backup. During a restore process, only the full backup and the latest differential backup need to be restored to recover all the data. The differential backups contain all the changes made since the last full backup, which ensures that the data can be restored to the latest state.

sorry, I meant to say one differential backup.

Full backup followed by differential backup will be a perfect fit as all data backed up after full backup can be restored with one incremental backup.

The BEST backup strategy to implement to minimize the number of backups that would need to be restored in case of data loss is to use full backups followed by incremental backups. With this strategy, a full backup of all data is performed initially, and then only changes made to the data since the last backup are backed up in subsequent incremental backups. If data loss occurs, the most recent full backup and all subsequent incremental backups would need to be restored, which reduces the amount of data lost compared to other strategies. Option E (Full backups followed by differential backups) is also a valid backup strategy, but it requires more storage space for backups compared to the full/incremental strategy. Additionally, restoring data requires the most recent full backup and the most recent differential backup. (answer generated by ChatGPT)

I’m more confused than before. Seems like there’s always two possible answers.

I don't know what's wrong with the discussion over here. Incremental backups are the ones that backsup the changes since the last full backup or the last incremental backup. Whereas differential backups are done only using last full backup. Lets say that a full back up is done on every monday, if the drive fails on the friday using incremental backup, we can only use the full backup done on monday and the last incremental backup done on thursday. Same example, if it was a differential we need to restore the full back up done on the moday and every differential backup done till friday. Hope, this helps.

Anwser is E

It's B

Anwser is E

That’s E. Full backup followed by differential backups.

As the question suggests to reduce the number of backups that need to be restored in case of data loss, The most recent differential will be a collection of all the changes since a full backup was done, whereas the incremental backups have to load each individual incremental as well as the full backup. I think the correct answer is E which requires fewer number of backup files to restore the data.

Differential backups only back up the files that have changed since the previous full backup, while incremental backups do the same, they back up the files that have changed since the previous incremental or full backup. Either B or E? Open for discussion..

Differential backups are quicker than full backups because so much less data is being backed up. But the amount of data being backed up grows with each differential backup until the next full back up. Differential backups are more flexible than full backups, but still unwieldy to do more than about once a day, especially as the next full backup approaches.