Add a couple of questions and exercises

SSIA

exercises/aws/solutions/hello_function.md

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+## Hello Function - Solution
+
+### Exercise
+
+Create a basic AWS Lambda function that when given a name, will return "Hello <NAME>"
+
+### Solution
+
+#### Define a function
+
+1. Go to Lambda console panel and click on `Create function`
+  1. Give the function a name like `BasicFunction`
+  2. Select `Python3` runtime
+  3. Now to handle function's permissions, we can attach IAM role to our function either by setting a role or creating a new role. I selected "Create a new role from AWS policy templates"
+  4. In "Policy Templates" select "Simple Microservice Permissions"
+
+1. Next, you should see a text editor where you will insert a code similar to the following
+
+#### Function's code
+```
+import json
+
+
+def lambda_handler(event, context):
+    firstName = event['name']
+    return 'Hello ' + firstName
+```
+2. Click on "Create Function"
+
+#### Define a test
+
+1. Now let's test the function. Click on "Test".
+2. Select "Create new test event"
+3. Set the "Event name" to whatever you'd like. For example "TestEvent"
+4. Provide keys to test
+
+```
+{
+  "name": 'Spyro'
+}
+```
+5. Click on "Create"
+
+#### Test the function
+
+1. Choose the test event you've create (`TestEvent`)
+2. Click on the `Test` button
+3. You should see something similar to `Execution result: succeeded`
+4. If you'll go to AWS CloudWatch, you should see a related log stream 

exercises/aws/solutions/url_function.md

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+## URL Function
+
+Create a basic AWS Lambda function that will be triggered when you enter a URL in the browser
+
+### Solution
+
+#### Define a function
+
+1. Go to Lambda console panel and click on `Create function`
+  1. Give the function a name like `urlFunction`
+  2. Select `Python3` runtime
+  3. Now to handle function's permissions, we can attach IAM role to our function either by setting a role or creating a new role. I selected "Create a new role from AWS policy templates"
+  4. In "Policy Templates" select "Simple Microservice Permissions"
+
+1. Next, you should see a text editor where you will insert a code similar to the following
+
+#### Function's code
+```
+import json
+
+
+def lambda_handler(event, context):
+    firstName = event['name']
+    return 'Hello ' + firstName
+```
+2. Click on "Create Function"
+
+#### Define a test
+
+1. Now let's test the function. Click on "Test".
+2. Select "Create new test event"
+3. Set the "Event name" to whatever you'd like. For example "TestEvent"
+4. Provide keys to test
+
+```
+{
+  "name": 'Spyro'
+}
+```
+5. Click on "Create"
+
+#### Test the function
+
+1. Choose the test event you've create (`TestEvent`)
+2. Click on the `Test` button
+3. You should see something similar to `Execution result: succeeded`
+4. If you'll go to AWS CloudWatch, you should see a related log stream
+
+#### Define a trigger
+
+We'll define a trigger in order to trigger the function when inserting the URL in the browser
+
+1. Go to "API Gateway console" and click on "New API Option"
+2. Insert the API name, description and click on "Create"
+3. Click on Action -> Create Resource
+4. Insert resource name and path (e.g. the path can be /hello) and click on "Create Resource"
+5. Select the resource we've created and click on "Create Method"
+6. For "integration type" choose "Lambda Function" and insert the lambda function name we've given to the function we previously created. Make sure to also use the same region
+7. Confirm settings and any required permissions
+8. Now click again on the resource and modify "Body Mapping Templates" so the template includes this:
+
+```
+{ "name": "$input.params('name')" }
+```
+9. Finally save and click on Actions -> Deploy API
+
+#### Running the function
+
+1. In the API Gateway console, in stages menu, select the API we've created and click on the GET option
+2. You'll see an invoke URL you can click on. You might have to modify it to include the input so it looks similar to this: `.../hello?name=mario`
+3. You should see in your browser `Hello Mario`