Contributor Insights in DynamoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable Contributor Insights on a DynamoDB table.

DynamoDB

aws dynamodb update-table --table-name MyTable --contributor-insights-specification Enabled=[1]

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

Afalse

Btrue

C"yes"

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using string values like "true" or "yes" instead of boolean true.

Using numbers like 1 instead of true.

To enable Contributor Insights, the Enabled parameter must be set to true (boolean).

2fill in blank

medium

Complete the code to query Contributor Insights metrics for a specific table.

DynamoDB

aws dynamodb describe-contributor-insights --table-name [1]

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

AMyTable

BContributorInsights

CInsightsTable

DTableName

Attempts:

3 left

💡 Hint

Common Mistakes

Using generic names instead of the actual table name.

Confusing parameter names.

The --table-name parameter requires the exact name of your DynamoDB table, such as MyTable.

3fill in blank

hard

Fix the error in the command to disable Contributor Insights on a table.

DynamoDB

aws dynamodb update-table --table-name MyTable --contributor-insights-specification Enabled=[1]

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

Afalse

B0

CTrue

D"false"

Attempts:

3 left

💡 Hint

Common Mistakes

Using capitalized True or False.

Using string "false" instead of boolean false.

To disable Contributor Insights, set Enabled to the boolean false (all lowercase, no quotes).

4fill in blank

hard

Fill both blanks to create a Contributor Insights rule for a DynamoDB index.

DynamoDB

aws dynamodb update-contributor-insights --table-name [1] --index-name [2] --contributor-insights-action ENABLE

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

AOrdersTable

BUsersTable

COrderIndex

DUserIndex

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing table and index names incorrectly.

Using wrong index names.

The command enables Contributor Insights on the OrderIndex of the OrdersTable.

5fill in blank

hard

Fill all three blanks to list all Contributor Insights rules for a table and filter by status.

DynamoDB

aws dynamodb list-contributor-insights --table-name [1] --filters Status=[2] --max-results [3]

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

AInventoryTable

BENABLED

C10

DDISABLED

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase status values.

Omitting max-results or using invalid numbers.

This command lists up to 10 Contributor Insights rules for InventoryTable where the status is ENABLED.

Practice

1. What is the primary purpose of Contributor Insights in DynamoDB?

easy

A. To back up the DynamoDB table data automatically

B. To identify who or what is contributing the most data to a table

C. To encrypt data stored in DynamoDB tables

D. To create indexes for faster queries

Solution

1. Step 1: Understand Contributor Insights functionality

   Contributor Insights helps monitor which users or processes contribute most data to a DynamoDB table.

2. Step 2: Compare with other options

   Backing up, encrypting, and indexing are different features unrelated to Contributor Insights.

3. Final Answer:

   To identify who or what is contributing the most data to a table -> Option B

4. Quick Check:

   Contributor Insights = Identify top contributors [OK]

Hint: Contributor Insights tracks data contributors, not backups or encryption [OK]

Common Mistakes:

• Confusing Contributor Insights with backup or encryption features
• Thinking it creates indexes
• Assuming it manages data encryption

2. Which of the following is the correct way to enable Contributor Insights on a DynamoDB table using AWS CLI?

easy

A. aws dynamodb start-contributor-insights --table-name MyTable

B. aws dynamodb enable-contributor-insights --table MyTable

C. aws dynamodb set-contributor-insights --table MyTable --action start

D. aws dynamodb update-contributor-insights --table-name MyTable --contributor-insights-action ENABLE

Solution

1. Step 1: Recall the correct AWS CLI command for Contributor Insights

   The correct command is update-contributor-insights with parameters --table-name and --contributor-insights-action ENABLE.

2. Step 2: Verify other options

   Other options use incorrect commands or parameters not supported by AWS CLI for this feature.

3. Final Answer:

   aws dynamodb update-contributor-insights --table-name MyTable --contributor-insights-action ENABLE -> Option D

4. Quick Check:

   Enable Contributor Insights = update-contributor-insights with ENABLE [OK]

Hint: Use 'update-contributor-insights' with ENABLE action to enable [OK]

Common Mistakes:

• Using non-existent commands like enable-contributor-insights
• Omitting required parameters
• Using wrong parameter names

3. Given Contributor Insights enabled on a table, which of the following best describes the output you will see when viewing the insights?

medium

A. A list of top contributors with their contribution counts and timestamps

B. A detailed log of every single write operation on the table

C. A backup snapshot of the table data

D. A list of all indexes on the table

Solution

1. Step 1: Understand Contributor Insights output

   Contributor Insights shows top contributors and their activity counts over time, not every write operation.

2. Step 2: Eliminate incorrect outputs

   It does not provide full logs, backups, or index lists.

3. Final Answer:

   A list of top contributors with their contribution counts and timestamps -> Option A

4. Quick Check:

   Contributor Insights output = top contributors summary [OK]

Hint: Contributor Insights summarizes top contributors, not full logs [OK]

Common Mistakes:

• Confusing Contributor Insights with full operation logs
• Expecting backup or index information
• Thinking it shows all data changes

4. You enabled Contributor Insights on your DynamoDB table but do not see any data in the insights dashboard after 24 hours. What is the most likely cause?

medium

A. Contributor Insights was not properly enabled on the table

B. You need to restart the DynamoDB service

C. The table has no write activity during this period

D. Contributor Insights only works on global secondary indexes

Solution

1. Step 1: Check Contributor Insights prerequisites

   Contributor Insights requires write activity to generate data; no writes means no insights.

2. Step 2: Evaluate other options

   Improper enabling would cause errors, not empty data. It works on tables and indexes. DynamoDB is managed, no restart needed.

3. Final Answer:

   The table has no write activity during this period -> Option C

4. Quick Check:

   No writes = no Contributor Insights data [OK]

Hint: No writes means no contributor data generated [OK]

Common Mistakes:

• Assuming Contributor Insights needs service restart
• Thinking it only works on indexes
• Not verifying table activity

5. You want to monitor unusual spikes in write activity on your DynamoDB table using Contributor Insights. Which approach best helps you detect these spikes effectively?

hard

A. Enable Contributor Insights and set alarms on top contributor counts exceeding thresholds

B. Manually check the table every hour for increased write counts

C. Disable Contributor Insights and rely on CloudWatch metrics only

D. Create a backup before enabling Contributor Insights

Solution

1. Step 1: Use Contributor Insights with alarms

   Enabling Contributor Insights and setting alarms on contributor counts helps detect unusual spikes automatically.

2. Step 2: Compare other options

   Manual checks are inefficient; disabling insights loses data; backups do not detect spikes.

3. Final Answer:

   Enable Contributor Insights and set alarms on top contributor counts exceeding thresholds -> Option A

4. Quick Check:

   Insights + alarms = effective spike detection [OK]

Hint: Combine Contributor Insights with alarms for spike alerts [OK]

Common Mistakes:

• Relying only on manual checks
• Disabling Contributor Insights
• Confusing backups with monitoring