On-demand backups in DynamoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an on-demand backup of a DynamoDB table.

DynamoDB

response = client.create_backup(TableName=[1], BackupName='MyBackup')

Drag options to blanks, or click blank then click option'

AMyTable

B'MyTable'

C'BackupTable'

DTableName

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put the table name in quotes.

Using a variable name without quotes.

The TableName parameter requires the table name as a string, so it must be in quotes.

2fill in blank

medium

Complete the code to list all backups for a DynamoDB table.

DynamoDB

response = client.list_backups(TableName=[1])

Drag options to blanks, or click blank then click option'

A'MyTable'

BMyTable

C'BackupList'

DTableName

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the table name without quotes.

Using the wrong parameter name.

The TableName parameter must be a string with the table name in quotes.

3fill in blank

hard

Fix the error in the code to delete a backup by its ARN.

DynamoDB

response = client.delete_backup(BackupArn=[1])

Drag options to blanks, or click blank then click option'

A'backup_arn_value'

Bbackup_arn

CbackupArn

D'backupArn_value'

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the ARN without quotes.

Using incorrect parameter names.

The BackupArn parameter requires the ARN as a string, so it must be in quotes.

4fill in blank

hard

Fill all three blanks to create a backup and print the backup ARN.

DynamoDB

response = client.create_backup(TableName=[1], BackupName=[2])
print(response['BackupDetails']['[3]'])

Drag options to blanks, or click blank then click option'

A'MyTable'

B'MyBackup'

CBackupArn

DBackupName

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes for table or backup names.

Using wrong key to access ARN.

You must provide the table name and backup name as strings. The ARN is accessed with the key 'BackupArn'.

5fill in blank

hard

Fill all three blanks to list backups filtered by table name and print the backup names.

DynamoDB

response = client.list_backups(TableName=[1])
for backup in response['Backups']:
    print(backup['[2]'])
    print(backup['[3]'])

Drag options to blanks, or click blank then click option'

A'MyTable'

BBackupName

CBackupArn

DTableName

Attempts:

3 left

💡 Hint

Common Mistakes

Not quoting the table name.

Using wrong keys to access backup details.

We filter backups by table name (string). Then print each backup's name and ARN using the keys 'BackupName' and 'BackupArn'.

Practice

1. What is the main purpose of on-demand backups in DynamoDB?

easy

A. To delete old data from the table

B. To automatically scale the table capacity

C. To encrypt data during transfer

D. To save a copy of your table data at any time for recovery

Solution

1. Step 1: Understand what on-demand backups do

   On-demand backups let you save your DynamoDB table data whenever you want.

2. Step 2: Identify the main purpose

   The main goal is to protect data and allow recovery if needed.

3. Final Answer:

   To save a copy of your table data at any time for recovery -> Option D

4. Quick Check:

   On-demand backups = save data anytime [OK]

Hint: Backups save data copies for recovery anytime [OK]

Common Mistakes:

• Confusing backups with scaling features
• Thinking backups delete data
• Mixing encryption with backup purpose

2. Which AWS CLI command is used to create an on-demand backup of a DynamoDB table?

easy

A. aws dynamodb backup-table

B. aws dynamodb start-backup

C. aws dynamodb create-backup

D. aws dynamodb save-backup

Solution

1. Step 1: Recall the correct AWS CLI command for backups

   The official command to create an on-demand backup is create-backup.

2. Step 2: Match the command with options

   Only aws dynamodb create-backup matches the exact AWS CLI syntax.

3. Final Answer:

   aws dynamodb create-backup -> Option C

4. Quick Check:

   Command to create backup = create-backup [OK]

Hint: Remember 'create-backup' for making backups [OK]

Common Mistakes:

• Using incorrect command names like start-backup
• Confusing backup commands with table creation
• Adding extra words not in AWS CLI syntax

3. What will happen if you run this AWS CLI command?

aws dynamodb create-backup --table-name Users --backup-name UsersBackup1

medium

A. It creates a backup named 'UsersBackup1' of the 'Users' table

B. It deletes the 'Users' table

C. It lists all backups of the 'Users' table

D. It restores the 'Users' table from a backup

Solution

1. Step 1: Analyze the command parameters

   The command uses create-backup with a table name and backup name.

2. Step 2: Understand the command effect

   This command creates a new backup of the specified table with the given backup name.

3. Final Answer:

   It creates a backup named 'UsersBackup1' of the 'Users' table -> Option A

4. Quick Check:

   create-backup + table + backup name = new backup [OK]

Hint: create-backup command makes a new backup copy [OK]

Common Mistakes:

• Thinking it deletes or restores the table
• Confusing create-backup with list-backups
• Assuming it modifies table data

4. You tried to create a backup with this command:

aws dynamodb create-backup --table-name Orders

Why did it fail?

medium

A. Table name 'Orders' does not exist

B. Missing the required --backup-name parameter

C. You need to use 'start-backup' instead of 'create-backup'

D. Backups are not supported for DynamoDB tables

Solution

1. Step 1: Check the command syntax

   The command is missing the --backup-name parameter which is required.

2. Step 2: Understand AWS CLI requirements

   Without a backup name, the command cannot create a backup and will fail.

3. Final Answer:

   Missing the required --backup-name parameter -> Option B

4. Quick Check:

   create-backup needs backup name [OK]

Hint: Always include --backup-name when creating backups [OK]

Common Mistakes:

• Assuming table name alone is enough
• Using wrong command like start-backup
• Believing backups are unsupported

5. You want to create an on-demand backup for a table named 'Products' and then restore it if needed. Which sequence of AWS CLI commands is correct?

hard

A. aws dynamodb create-backup --table-name Products --backup-name ProdBackup1aws dynamodb restore-table-from-backup --target-table-name ProductsRestored --backup-arn

B. aws dynamodb backup-table --table-name Productsaws dynamodb restore-table --table-name ProductsRestored

C. aws dynamodb start-backup --table Productsaws dynamodb recover-table --table ProductsRestored

D. aws dynamodb create-backup --table Products --backup-name ProdBackup1aws dynamodb restore-backup --table ProductsRestored --backup-name ProdBackup1

Solution

1. Step 1: Identify correct backup creation command

   The correct command to create a backup is create-backup with table and backup names.

2. Step 2: Identify correct restore command

   To restore, use restore-table-from-backup with target table name and backup ARN.

3. Step 3: Verify options

   Only aws dynamodb create-backup --table-name Products --backup-name ProdBackup1
   aws dynamodb restore-table-from-backup --target-table-name ProductsRestored --backup-arn uses the correct commands and parameters for both backup and restore.

4. Final Answer:

   Use create-backup then restore-table-from-backup with backup ARN -> Option A

5. Quick Check:

   Backup with create-backup, restore with restore-table-from-backup [OK]

Hint: Backup with create-backup, restore with restore-table-from-backup [OK]

Common Mistakes:

• Using wrong commands like start-backup or backup-table
• Missing backup ARN in restore command
• Confusing restore parameters