BDS-C00 questions and answers

Is there any way to own a direct connection to Amazon Web Services?

After an Amazon VPC instance is launched, can I change the VPC security groups it belongs to?

There are thousands of text files on Amazon S3. The total size of the files is 1 PB. The files contain retail order information for the past 2 years. A data engineer needs to run multiple interactive queries to manipulate the data. The Data Engineer has AWS access to spin up an Amazon EMR cluster. The data engineer needs to use an application on the cluster to process this data and return the results in interactive time frame.

Which application on the cluster should the data engineer use?

By default what are ENIs that are automatically created and attached to instances using the EC2 console set to do when the attached instance terminates?

Can the string value of 'Key' be prefixed with laws?

An organization would like to run analytics on their Elastic Load Balancing logs stored in Amazon S3 and join this data with other tables in Amazon S3. The users are currently using a BI tool connecting with JDBC and would like to keep using this BI tool.

Which solution would result in the LEAST operational overhead?

A user has created a launch configuration for Auto Scaling where CloudWatch detailed monitoring is disabled. The user wants to now enable detailed monitoring.

How can the user achieve this?

You have been asked to handle a large data migration from multiple Amazon RDS MySQL instances to a DynamoDB table. You have been given a short amount of time to complete the data migration.

What will allow you to complete this complex data processing workflow?

You have an ASP.NET web application running in Amazon Elastic BeanStalk. Your next version of the application requires a third-party Windows installer package to be installed on the instance on first boot and before the application launches.

Which options are possible? Choose 2 answer

A user is receiving a notification from the RDS DB whenever there is a change in the DB security group.
The user does not want to receive these notifications for only a month. Thus, he does not want to delete the notification.

How can the user configure this?

Can I detach the primary (eth0) network interface when the instance is running or stopped?

An organization uses a custom map reduce application to build monthly reports based on many small data files in an Amazon S3 bucket. The data is submitted from various business units on a frequent but unpredictable schedule. As the dataset continues to grow, it becomes increasingly difficult to process all of the data in one day. The organization has scaled up its Amazon EMR cluster, but other optimizations could improve performance.

The organization needs to improve performance with minimal changes to existing processes and applications.

What action should the organization take?

A __________ is the concept of allowing (or disallowing) an entity such as a user, group, or role some type

of access to one or more resources.

An organization is designing an application architecture. The application will have over 100 TB of data and will support transactions that arrive at rates from hundreds per second to tens of thousands per second, depending on the day of the week and time of day. All transaction data, must be durably and reliably stored. Certain read operations must be performed with strong consistency.

Which solution meets these requirements?

You are deploying an application to collect votes for a very popular television show. Millions of users will submit votes using mobile devices. The votes must be collected into a durable, scalable, and highly available data store for real-time public tabulation.

Which service should you use?

A user has created an ELB with Auto Scaling.

Which of the below mentioned offerings from ELB helps the user to stop sending new requests traffic from the load balancer to the EC2 instance when the instance is being deregistered while continuing in-flight requests?

A gaming organization is developing a new game and would like to offer real-time competition to their users. The data architecture has the following characteristics:

1. The game application is writing events directly to Amazon DynamoDB from the user's mobile device.
2. Users from the website can access their statistics directly from DynamoDB.
3. The game servers are accessing DynamoDB to update the user's information.
4. The data science team extracts data from DynamoDB for various applications.
5. The engineering team has already agreed to the IAM roles and policies to use for the data science team and the application.

Which actions will provide the MOST security, while maintaining the necessary access to the website and game application? (Choose two.)

What's an ECU?

What does Amazon RDS stand for?

The project you are working on currently uses a single AWS CloudFormation template to deploy its AWS infrastructure, which supports a multi-tier web application. You have been tasked with organizing the AWS CloudFormation resources so that they can be maintained in the future, and so that different departments such as Networking and Security can review the architecture before it goes to Production.

How should you do this in a way that accommodates each department, using their existing workflows?

A real-time bidding company is rebuilding their monolithic application and is focusing on serving real-time data. A large number of reads and writes are generated from thousands of concurrent users who follow items and bid on the company's sale offers.
The company is experiencing high latency during special event spikes, with millions of concurrent users.

The company needs to analyze and aggregate a part of the data in near real time to feed an internal dashboard.

What is the BEST approach for serving and analyzing data, considering the constraint of the row latency on the highly demanded data?

A data engineer is running a DWH on a 25-node Redshift cluster of a SaaS service. The data engineer needs to build a dashboard that will be used by customers. Five big customers represent 80% of usage, and there is a long tail of dozens of smaller customers. The data engineer has selected the dashboarding tool.

How should the data engineer make sure that the larger customer workloads do NOT interfere with the smaller customer workloads?

The operations team and the development team want a single place to view both operating system and application logs.

How should you implement this using AWS services? Choose two answers

In the Amazon RDS Oracle DB engine, the Database Diagnostic Pack and the Database Tuning Pack are only available with ______________

Which Amazon storage do you think is the best for my database-style applications that frequently encounter many random reads and writes across the dataset?

Are you able to integrate a multi-factor token service with the AWS Platform?

A user has setup an RDS DB with Oracle. The user wants to get notifications when someone modifies the security group of that DB.

How can the user configure that?

An administrator tries to use the Amazon Machine Learning service to classify social media posts that mention the administrator's company into posts that require a response and posts that do not. The training dataset of 10,000 posts contains the details of each post including the timestamp, author, and full text of the post. The administrator is missing the target labels that are required for training.

Which Amazon Machine Learning model is the most appropriate for the task?

A company needs to deploy virtual desktops to its customers in a virtual private cloud, leveraging existing security controls.

Which set of AWS services and features will meet the company's requirements?

Which data store should the organization choose?

An online photo album app has a key design feature to support multiple screens (e.g. desktop, mobile phone, and tablet) with high quality displays. Multiple versions of the image must be saved in different resolutions and layouts.

The image processing Java program takes an average of five seconds per upload, depending on the image size and format. Each image upload captures the following image metadata: user, album, photo label, upload timestamp

The app should support the following requirements:

1. Hundreds of user image uploads per second
2. Maximum image metadata size of 10 MB

3. Maximum image metadata size of 1 KB
4. Image displayed in optimized resolution in all supported screens no later than one minute after image upload

Which strategy should be used to meet these requirements?

You have a video Trans coding application running on Amazon EC2. Each instance pools a queue to find out which video should be Trans coded, and then runs a Trans coding process.

If this process is interrupted, the video will be Trans coded by another instance based on the queuing system. You have a large backlog of videos which need to be Trans coded and would like to reduce this backlog by adding more instances. You will need these instances only until the backlog is reduced.

Which type of Amazon EC2 instance should you use to reduce the backlog in the most cost-effective way?

A medical record filing system for a government medical fund is using an Amazon S3 bucket to archive documents related to patients. Every patient visit to a physician creates a new file, which can add up millions of files each month. Collection of these files from each physician is handled via a batch process that runs ever night using AWS Data Pipeline. This is sensitive data, so the data and any associated metadata must be encrypted at rest.

Auditors review some files on a quarterly basis to see whether the records are maintained according to regulations. Auditors must be able to locate any physical file in the S3 bucket for a given date, patient, or physician. Auditors spend a significant amount of time location such files.

What is the most cost-and time-efficient collection methodology in this situation?

An organization is designing an Amazon DynamoDB table for an application that must meet the following requirements:

1. Item size is 40 KB
2. Read/write ratio 2000/500 sustained, respectively
3. Heavily read-oriented and requires low latencies in the order of milliseconds
4. The application runs on an Amazon EC2 instance
5. Access to the DynamoDB table must be secure within the VPC
6. Minimal changes to application code to improve performance using write-through cache

Which design options will BEST meet these requirements?

An organization uses Amazon Elastic MapReduce(EMR) to process a series of extract-transform-load (ETL) steps that run in sequence. The output of each step must be fully processed in subsequent steps but will not be retained.

Which of the following techniques will meet this requirement most efficiently?

Is there a method in the IAM system to allow or deny access to a specific instance?

An organization has configured a VPC with an Internet Gateway (IGW). Pairs of public and private subnets (each with one subnet per Availability Zone), and an Elastic Load Balancer (ELB) configured to use the public subnets. The application's web tier leverages the ELB. Auto Scaling and a multi-AZ RDS database instance the organization would like to eliminate any potential single points of failure in this design.

What step should you take to achieve this organization's objective?

What happens to the I/O operations while you take a database snapshot?

A large oil and gas company needs to provide near real-time alerts when peak thresholds are exceeded in its pipeline system. The company has developed a system to capture pipeline metrics such as flow rate, pressure, and temperature using millions of sensors. The sensors deliver to AWS IoT.

What is a cost-effective way to provide near real-time alerts on the pipeline metrics?

A user is trying to setup a recurring Auto Scaling process. The user has setup one process to scale up every day at 8 am and scale down at 7 PM. The user is trying to setup another recurring process which scales up on the 1st of every month at 8 AM and scales down the same day at 7 PM.

What will Auto Scaling do in this scenario?