AWS Console and DynamoDB setup - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the AWS Management Console?

The AWS Management Console is a web-based interface that lets you manage AWS services easily without needing to write code. It’s like a control panel for your cloud resources.

beginner

What is Amazon DynamoDB used for?

Amazon DynamoDB is a fast and flexible database service that stores data in tables. It is designed to handle large amounts of data with quick responses, perfect for apps that need to work smoothly at any scale.

intermediate

What is a primary key in DynamoDB?

A primary key uniquely identifies each item in a DynamoDB table. It can be a simple key (partition key) or a composite key (partition key + sort key) to organize and find data efficiently.

beginner

How do you create a DynamoDB table in the AWS Console?

In the AWS Console, go to DynamoDB service, click 'Create table', enter a table name, define the primary key, and then click 'Create'. This sets up your database table ready to store data.

intermediate

Why is it important to choose the right primary key when setting up a DynamoDB table?

Choosing the right primary key helps DynamoDB quickly find and organize your data. A poor choice can slow down your app or cause data to be unevenly stored, making it less efficient.

What is the first step to create a DynamoDB table in the AWS Console?

A Go to DynamoDB service and click 'Create table'

B Write code to create the table

C Open EC2 dashboard

D Download DynamoDB software

The AWS Console lets you create tables by navigating to DynamoDB and clicking 'Create table'. No code or downloads are needed for this step.

Which of the following is NOT a part of a DynamoDB primary key?

A Partition key

B Sort key

C Composite key

D Foreign key

DynamoDB primary keys use partition keys and optionally sort keys. Foreign keys are a concept from relational databases, not DynamoDB.

What does the AWS Management Console provide?

A A web interface to manage AWS services

B A database service

C A mobile app for AWS billing

D A command-line tool only

The AWS Management Console is a web interface that helps users manage AWS services easily.

Why should you carefully choose the primary key in DynamoDB?

A It changes the color of the AWS Console

B It affects how fast and well your data is accessed

C It controls your AWS billing

D It decides your internet speed

The primary key determines how DynamoDB stores and retrieves data, impacting performance.

Which AWS service do you use to create and manage DynamoDB tables?

A AWS Lambda

B Amazon EC2

C Amazon DynamoDB

D Amazon S3

Amazon DynamoDB is the service specifically for creating and managing DynamoDB tables.

Explain the steps to create a DynamoDB table using the AWS Console.

Think about the simple clicks and inputs you do in the web interface.

Describe why choosing the right primary key is important in DynamoDB.

Consider how you find things quickly in a well-organized filing system.

Practice

1. What is the main purpose of the primary key when creating a DynamoDB table in the AWS Console?

easy

A. To uniquely identify each item in the table

B. To set the read and write capacity

C. To define the table's region

D. To specify the encryption method

Solution

1. Step 1: Understand the role of the primary key

   The primary key is used to uniquely identify each item in a DynamoDB table, ensuring no duplicates.

2. Step 2: Compare with other options

   Read/write capacity, region, and encryption are important but unrelated to item uniqueness.

3. Final Answer:

   To uniquely identify each item in the table -> Option A

4. Quick Check:

   Primary key = unique item ID [OK]

Hint: Primary key always means unique ID for each item [OK]

Common Mistakes:

• Confusing primary key with capacity settings
• Thinking primary key sets table region
• Assuming primary key controls encryption

2. Which of the following is the correct way to select the capacity mode when creating a DynamoDB table in the AWS Console?

easy

A. Set capacity mode to Manual or Automatic

B. Choose between On-Demand or Provisioned capacity modes

C. Select capacity mode as Static or Dynamic

D. Pick capacity mode as Fixed or Variable

Solution

1. Step 1: Recall DynamoDB capacity modes

   DynamoDB offers two capacity modes: On-Demand (automatic scaling) and Provisioned (fixed capacity).

2. Step 2: Eliminate incorrect terms

   Manual/Automatic, Static/Dynamic, Fixed/Variable are not official DynamoDB terms for capacity modes.

3. Final Answer:

   Choose between On-Demand or Provisioned capacity modes -> Option B

4. Quick Check:

   Capacity mode = On-Demand or Provisioned [OK]

Hint: Remember only On-Demand and Provisioned are valid capacity modes [OK]

Common Mistakes:

• Using wrong terms like Manual or Static
• Confusing capacity mode with encryption settings
• Assuming capacity mode is set after table creation

3. You create a DynamoDB table with a primary key named OrderId and choose On-Demand capacity mode. What happens when you insert a new item with OrderId = 123?

medium

A. The table requires manual capacity increase before insertion

B. The item is rejected because capacity is not provisioned

C. The item is stored uniquely and capacity scales automatically

D. The item overwrites any existing item regardless of key

Solution

1. Step 1: Understand On-Demand capacity mode behavior

   On-Demand mode automatically adjusts capacity to handle requests without manual provisioning.

2. Step 2: Consider primary key uniqueness

   Primary key OrderId ensures the item with value 123 is stored uniquely; no overwriting unless key duplicates.

3. Final Answer:

   The item is stored uniquely and capacity scales automatically -> Option C

4. Quick Check:

   On-Demand + unique key = auto scale and store [OK]

Hint: On-Demand means no manual capacity needed [OK]

Common Mistakes:

• Thinking On-Demand requires manual capacity setup
• Assuming item overwrites existing without key conflict
• Believing insertion fails without provisioned capacity

4. You tried to create a DynamoDB table in the AWS Console but got an error saying the primary key is missing. What should you do to fix this?

medium

A. Create the table without a primary key and add it later

B. Skip primary key and rely on DynamoDB to auto-generate it

C. Set the capacity mode to Provisioned to avoid the error

D. Specify a primary key attribute name and type before creating the table

Solution

1. Step 1: Recognize primary key requirement

   DynamoDB requires a primary key defined at table creation to uniquely identify items.

2. Step 2: Correct the table setup

   Specify the primary key attribute name (e.g., "UserId") and its data type (String or Number) in the AWS Console before creating the table.

3. Final Answer:

   Specify a primary key attribute name and type before creating the table -> Option D

4. Quick Check:

   Primary key must be set at creation [OK]

Hint: Always define primary key before creating table [OK]

Common Mistakes:

• Expecting DynamoDB to auto-create primary key
• Trying to create table without primary key
• Changing capacity mode to fix primary key error

5. You want to create a DynamoDB table for a mobile app that has unpredictable traffic spikes. Which capacity mode should you choose in the AWS Console to optimize cost and performance?

hard

A. On-Demand capacity mode to handle variable traffic automatically

B. Provisioned capacity mode with fixed read/write units

C. Provisioned capacity mode with auto-scaling disabled

D. Manual capacity mode with scheduled scaling

Solution

1. Step 1: Analyze traffic pattern

   Unpredictable traffic spikes require flexible capacity to avoid throttling or overspending.

2. Step 2: Choose capacity mode accordingly

   On-Demand capacity mode automatically adjusts to traffic changes, optimizing cost and performance without manual intervention.

3. Step 3: Eliminate incorrect options

   Provisioned with fixed units or disabled auto-scaling cannot handle spikes well; manual mode is not a DynamoDB option.

4. Final Answer:

   On-Demand capacity mode to handle variable traffic automatically -> Option A

5. Quick Check:

   Unpredictable traffic = On-Demand mode [OK]

Hint: Use On-Demand for apps with unpredictable traffic [OK]

Common Mistakes:

• Choosing fixed provisioned capacity for variable traffic
• Disabling auto-scaling in provisioned mode
• Assuming manual capacity mode exists