By: Prof. Dr. Fazal Rehman | Last updated: September 23, 2024
What is the primary purpose of database backup?
a) To improve database performance
b) To restore the database to a previous state in case of failure or data loss
c) To optimize SQL queries
d) To manage user access controlAnswer: b) To restore the database to a previous state in case of failure or data loss
Which type of backup involves copying all the data in the database, regardless of previous backups?
a) Incremental Backup
b) Differential Backup
c) Full Backup
d) Log BackupAnswer: c) Full Backup
In which backup type are only the changes made since the last backup saved?
a) Full Backup
b) Differential Backup
c) Incremental Backup
d) Snapshot BackupAnswer: c) Incremental Backup
Which backup strategy involves making a backup of the data since the last full backup, but not the incremental backups?
a) Incremental Backup
b) Differential Backup
c) Full Backup
d) Log BackupAnswer: b) Differential Backup
What is a transaction log backup?
a) A backup of all the data in the database
b) A backup of only the changes to the database since the last log backup
c) A backup of the database schema
d) A backup of the database’s transaction logs to enable point-in-time recoveryAnswer: d) A backup of the database’s transaction logs to enable point-in-time recovery
What does the term “point-in-time recovery” refer to?
a) Restoring the database to the state it was in at a specific point in time
b) Restoring only the schema of the database
c) Recovering data from a backup made yesterday
d) Restoring the database to the most recent backupAnswer: a) Restoring the database to the state it was in at a specific point in time
Which backup strategy requires the least amount of storage space and backup time?
a) Full Backup
b) Differential Backup
c) Incremental Backup
d) Mirror BackupAnswer: c) Incremental Backup
What is the primary advantage of a differential backup over a full backup?
a) It provides a complete backup of the database
b) It is faster to perform and requires less storage space compared to a full backup
c) It allows for point-in-time recovery
d) It is more secure than full backupsAnswer: b) It is faster to perform and requires less storage space compared to a full backup
Which of the following backup methods is typically used to protect against data loss due to user errors or system crashes?
a) Full Backup
b) Incremental Backup
c) Differential Backup
d) Log BackupAnswer: a) Full Backup
What is the primary purpose of a backup strategy that includes offsite backups?
a) To ensure faster recovery times
b) To reduce backup storage costs
c) To protect against data loss due to physical damage or theft at the primary site
d) To enhance database performanceAnswer: c) To protect against data loss due to physical damage or theft at the primary site
What does “backup rotation” refer to?
a) The process of rotating backup media on a regular basis
b) The frequency of performing backups
c) The process of restoring data from multiple backup sets
d) The order in which backups are performedAnswer: a) The process of rotating backup media on a regular basis
Which type of backup involves creating a snapshot of the database at a particular moment in time?
a) Full Backup
b) Differential Backup
c) Incremental Backup
d) Snapshot BackupAnswer: d) Snapshot Backup
What is the main drawback of relying solely on incremental backups?
a) They are slower to restore compared to full backups
b) They require more storage space than full backups
c) They are less secure than full backups
d) They require restoration of the last full backup and all subsequent incremental backupsAnswer: d) They require restoration of the last full backup and all subsequent incremental backups
Which backup type is used to ensure that all committed transactions are saved for recovery purposes?
a) Full Backup
b) Incremental Backup
c) Log Backup
d) Differential BackupAnswer: c) Log Backup
What is a “backup window”?
a) The time frame during which backups are scheduled to be performed
b) The time required to restore data from backups
c) The time when backup data is archived
d) The period during which backups are validatedAnswer: a) The time frame during which backups are scheduled to be performed
