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AWS Certified Developer - Associate > Compute and Networking > Flashcards

Compute and Networking Flashcards

1
Q 
When you launch an Amazon Elastic Compute Cloud (Amazon EC2) instance, which of the following is the most specific type of AWS entity in which you can place it?
A. Region
B. Availability Zone 
C. Edge location
D. Data center
A

Availability Zone

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2
Q

You have saved SSH connection information for an Amazon Elastic Compute Cloud (Amazon EC2) instance that you launched in a public subnet. You previously stopped the instance the last time you used it. Now that you have started the instance, you are unable to connect to the instance using the saved information. Which of the following could be the cause?
A. Your SSH key pair has automatically expired.
B. The public IP of the instance has changed.
C. The security group rules have expired.
D. SSH is enabled only for the first boot of an Amazon EC2 instance.

A

The public IP of the instance has changed.

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3
Q

You are working from a new location today. You are unable to initiate a Remote Desktop Protocol (RDP) to your Windows instance, which is located in a public subnet. What could be the cause?
A. Your new IP address may not match the inbound security group rules.
B. Your new IP address may not match the outbound security group rules.
C. RDP is not available for Windows instances, only SSH.
D. RDP is enabled only for the first 24 hours of your instance runtime.

A

Your new IP address may not match the inbound security group rules.

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4
Q

You have a backend Amazon EC2 instance providing a web service to your web server instances. Your web servers are in a public subnet. You would like to block inbound requests from the internet to your backend instance but still allow the instance to make API requests over the public internet. What steps must you take? (Select TWO.)
A. Launch the instance in a private subnet and rely on a NAT gateway in a public subnet to forward outbound internet requests.
B. Configure the security group for the instance to explicitly deny inbound requests from the internet.
C. Configure the network access control list (network ACL) for the public subnet to explicitly deny inbound web requests from the internet.
D. Modify the inbound security group rules for the instance to allow only inbound requests from your web servers.

A

Launch the instance in a private subnet and rely on a NAT gateway in a public subnet to forward outbound internet requests.

Modify the inbound security group rules for the instance to allow only inbound requests from your web servers.

Notes:
- Security Group can only contain ‘Allow’ rules

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5
Q

You have launched an Amazon Elastic Compute Cloud (Amazon EC2) instance and loaded your application code on it. You have now discovered that the instance is missing applications on which your code depends. How can you resolve this issue?
A. Modify the instance profile to include the software dependencies.
B. Create an AWS Identity and Access Management (IAM) user, and sign in to the
instance to install the dependencies.
C. Sign in to the instance as the default user, and install any additional dependencies that you need.
D. File an AWS Support ticket, and request to install the software on your instance.

A

Sign in to the instance as the default user, and install any additional dependencies that you need

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6
Q

How can code running on an Amazon Elastic Compute Cloud (Amazon EC2) instance
automatically discover its public IP address?
A. The public IP address is presented to the OS on the instance automatically. No extra steps are required.
B. The instance can query another Amazon EC2 instance in the same Amazon Virtual Private Cloud (Amazon VPC).
C. You must use a third-party service to look up the public IP.
D. The instance can make an HTTP query to the Amazon EC2 metadata service at 169.254.169.254.

A

The instance can make an HTTP query to the Amazon EC2 metadata service at 169.254.169.254

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7
Q

How can you customize the software of your Amazon Elastic Compute Cloud (Amazon EC2) instance beyond what the Amazon Machine Image (AMI) provides?
A. Provide a user data attribute at launch that contains a script or directives to install additional packages.
B. Additional packages are installed automatically by placing them in a special Amazon Simple Storage Service (Amazon S3) bucket in your account.
C. You do not have permissions to install new software on Amazon EC2 aside from what is in the AMI.
D. Unlock the instance using the AWS Key Management Service (AWS KMS) and then sign in to install new packages.

A

Provide a user data at launch that contains a script or directives to install additional packages

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8
Q

You have a process running on an Amazon Elastic Compute Cloud (Amazon EC2) instance that exceeds the 2 GB of RAM allocated to the instance. This is causing the process to run slowly. How can you resolve the issue?
A. Stop the instance, change the instance type to one with more RAM, and then start the instance.
B. Modify the RAM allocation for the instance while it is running.
C. Take a snapshot of the data and then launch a new instance. You cannot change the
RAM allocation.
D. Send an email to AWS Support to install additional RAM on the server.

A

Modify the RAM allocation for the instance while it is running

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9
Q

You have launched an Amazon Elastic Compute Cloud (Amazon EC2) Windows instance, and you would like to connect to it using the Remote Desktop Protocol. The instance is in a public subnet and has a public IP address. How do you find the password to the Administrator account?
A. Decrypt the password by using the private key from the Amazon EC2 key pair that you used to launch the instance.
B. Use the password that you provided when you launched the instance.
C. Create a new AWS Identity and Access Management (IAM) role, and use the password
for that role.
D. Create an IAM user, and use the password for that user.

A

Decrypt the password by using the private key from the Amazon EC2 key pair that you used to launch the instance

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10
Q

What steps must you take to ensure that an Amazon EC2 instance can receive web requests from customers on the internet? (Select THREE.)
A. Assign a public IP address to the instance.
B. Launch the instance in a subnet where the route table routes internet-bound traffic to an internet gateway.
C. Launch the instance in a subnet where the route table rules send internet-bound traffic to a NAT gateway.
D. Set the outbound rules for the security group to allow HTTP and HTTPS traffic.
E. Set the inbound rules for the security group to allow HTTP and HTTPS traffic.

A

Assign a public IP address to the instance

Launch the instance in a subnet where the route table routes internet-bound traffic to an internet gateway

Set inbound rules for the security group to allow HTTP/S traffic

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11
Q

Which of the following are true about Amazon Machine Images (AMI)? (Select TWO.)
A. AMI can be used to launch one or multiple Amazon EC2 instances.
B. AMI is automatically available in all AWS Regions.
C. All AMIs are created and maintained by AWS.
D. AMIs are available for both Windows and Linux instances.

A

AMI can be used to launch one or multiple EC2 instances

AMIs are available for both Windows and Linux instances

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12
Q

Which of the following are true about Amazon Elastic Compute Cloud (Amazon EC2) instance types? (Select TWO.)
A. All Amazon EC2 instance types include instance store for ephemeral storage.
B. All Amazon EC2 instance types can use EBS volumes for persistent storage.
C. Amazon EC2 instances cannot be resized once launched.
D. Some Amazon EC2 instances may have access to GPUs or other hardware accelerators.

A

All Amazon EC2 instance types can use EBS volumes for persistent storage.

Some EC2 instances may have access to GPUs and hardware accelerators

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13
Q

Which of the following actions are valid based on the Amazon Elastic Compute Cloud (Amazon EC2) instance lifecycle? (Select TWO.)
A. Starting a previously terminated instance
B. Starting a previously stopped instance
C. Rebooting a stopped instance
D. Stopping a running instance

A

Starting a previously STOPPED instance

Stopping a RUNNING instance

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14
Q

You have a development Amazon Elastic Compute Cloud (Amazon EC2) instance where you have installed Apache Web Server and MySQL. How do you verify that the web server application can communicate with the database given that they are both running on the same instance?
A. Modify the security group for the instance.
B. Assign the instance a public IP address.
C. Modify the network access control list (network ACL) for the instance.
D. No extra configuration is required.

A

No extra configuration is required (they can communicate locally)

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15
Q

What type of route must exist in the associated route table for a subnet to be public subnet?
A. A route to a VPN gateway
B. Only the local route is required.
C. A route to an internet gateway
D. A route to a NAT gateway or NAT instance
E. A route to an Amazon VPC endpoint

A

A route to an internet gateway

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16
Q

What type of route must exist in the associated route table for a subnet to be a private subnet that allows outbound internet access?
A. A route to a VPN gateway
B. Only the local route is required.
C. A route to an internet gateway
D. A route to a NAT gateway or NAT instance
E. A route to an Amazon Virtual Private Cloud (Amazon VPC) endpoint

A

A route to a NAT gateway or NAT instance

17
Q 
Which feature of Amazon Virtual Private Cloud (Amazon VPC) enables you to see which network requests are being accepted or rejected in your Amazon VPC?
A. Internet gateway
B. NAT gateway
C. Route table
D. Amazon VPC Flow Log
A

Amazon VPC Flow Log

18
Q

Which AWS service enables you to track the CPU utilization of an Amazon Elastic Compute Cloud (Amazon EC2) instance?
A. AWS Config
B. AWS Lambda
C. Amazon CloudWatch
D. Amazon Virtual Private Cloud (Amazon VPC)

A

Amazon CloudWatch

19
Q

What happens to the data stored on an Amazon Elastic Block Store (Amazon EBS) volume when you stop an Amazon Elastic Compute Cloud (Amazon EC2) instance?
A. The data is moved to Amazon Simple Storage Service (Amazon S3).
B. The data persists in the EBS volume.
C. The volume is deleted.
D. An EBS-backed instance cannot be stopped.

A

The data persists in the EBS volume

20
Q 
Which programming language can you use to write the code that runs on an Amazon EC2
instance?
A. C++
B. Java
C. Ruby
D. JavaScript
E. Python
F. All of the above
A

All

21
Q

You have launched an EC2 instance in a public subnet with assigned IP address, and you have confirmed that the Apache web server is running. However, your internet users are unable to make web requests to the instance. How can you resolve the issue? (Select TWO.)
A. Modify the security group to allow outbound traffic on port 80 to anywhere.
B. Modify the security group for the web server to allow inbound traffic port 80 from anywhere.
C. Modify the security group for the web server to allow inbound traffic on port 443 from anywhere.
D. Modify the security group to allow outbound traffic from port 443 to anywhere.

A

Modify security group for the web server to allow inbound traffic port 80 and 443 from anywhere

22
Q

Which of the following are the customer’s responsibility concerning Amazon EC2 instances? (Select TWO.)
A. Decommissioning storage hardware
B. Patching the guest operating system
C. Securing physical access to the host machine
D. Managing the sign-in accounts and credentials on the guest operating system
E. Maintaining the software that runs on the underlying host machine

A

Patching the guest OS

Managing the sign-in accounts and credentials on the guest OS

AWS Certified Developer - Associate (5 decks)

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