Fix Kubernetes questions format

Was using 4 backticks instead of 3.

topics/aws/README.md

@@ -157,6 +157,7 @@ Failover | Route 53 | [Exercise](exercises/route_53_failover/exercise.md) | [Sol
 |--------|--------|------|----|----|
 | Hello Function | Lambda | [Exercise](exercises/hello_function/exercise.md) | [Solution](exercises/hello_function/solution.md) | |
 | URL Function | Lambda | [Exercise](exercises/url_function/exercise.md) | [Solution](exercises/url_function/solution.md) | |
+| Web App with DB | Lambda, DynamoDB | [Exercise](exercises/web_app_dynamodb/exercise.md) | [Solution](exercises/web_app_dynamodb/solution.md) | |
 
 ### Elastic Beanstalk
 
@@ -1211,18 +1212,20 @@ Read more on it [here](https://aws.amazon.com/lambda)
 <details>
 <summary>True or False? In AWS Lambda, you are charged as long as a function exists, regardless of whether it's running or not</summary><br><b>
 
-False. Charges are being made when the code is executed.
+False. Charges are being made when the function is executed for the time it takes to execute and compute resources it uses.
 </b></details>
 
 <details>
 <summary>Which of the following set of languages Lambda supports?
 
 - R, Swift, Rust, Kotlin
-- Python, Ruby, Go
-- Python, Ruby, PHP
+- Python, Ruby, Go, Kotlin, Bash
+- Python, Ruby, PHP, PowerShell, C#, Perl
+- Python, Ruby, Go, Node.js, Groovy, C++
+- Python, Ruby, Go, Node.js, PowerShell, C#
 </summary><br><b>
 
-- Python, Ruby, Go
+- Python, Ruby, Go, Node.js, PowerShell, C#
 </b></details>
 
 <details>
@@ -3466,4 +3469,4 @@ More details are missing to determine for sure but it might be better to decoupl
 
 ARN (Amazon Resources Names) used for uniquely identifying different AWS resources.
 It is used when you would like to identify resource uniqely across all AWS infra.
-</b></details>
+</b></details>

topics/aws/exercises/web_app_lambda_dynamodb/exercise.md

@@ -0,0 +1,11 @@
+# Web App with DB
+
+## Objectives
+
+Implement the following architecture:
+
+<TODO>
+
+## Solution
+
+Click [here](solution.md) to view the solution

topics/aws/exercises/web_app_lambda_dynamodb/terraform/main.tf

@@ -0,0 +1,23 @@
+provider "aws" {
+  region = "us-west-1"
+}
+
+resource "aws_dynamodb_table" "users" {
+  name     = "users"
+  hash_key = "id"
+
+  attribute {
+    name = "id"
+    type = "S"
+  }
+
+  attribute {
+    name = "login"
+    type = "S"
+  }
+
+  global_secondary_index {
+    hash_key = 
+    
+  }
+}