Showing posts with label cloud. Show all posts
Showing posts with label cloud. Show all posts

March 09, 2023

Top 20 AWS Device Farm Interview Questions and Answers


                AWS Device Farm enables developers to test and interact with actual Android and iOS devices in the AWS Cloud, improving application quality, time to market, and customer happiness. Developers may conduct automated tests simultaneously across hundreds of real devices using their uploaded apps and test scripts, receiving results, images, videos, and performance data in a matter of minutes. Also, they can use their web browser to swipe, gesture, and interact with a device to diagnose and replicate client concerns.

 

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Ques. 1): How do you dispose of the equipment when my testing is finished?

Answer:

We carry out a number of cleanup procedures on each device when test execution is over, including uninstalling your software. The device will be taken away and no longer be available if we are unable to confirm the removal of your app or any of the other cleanup procedures.

It is possible for data to remain across sessions in some circumstances, particularly if you access the device system outside the context of your app, even though we constantly add new cleanup stages and enhance the cleanup procedure. It is advised that you refrain from providing or entering sensitive information such as account information (e.g., Google Account, Apple ID), personal information, and other security-sensitive details during your automated test and remote access sessions because AWS Device Farm records video and logs of all activity taking place while you use each device.

 

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Ques. 2): Amazon Device Farm should be used by whom and why?

Answer:

AWS Device Farm is made for programmers, QA groups, and customer service agents that create, test, and support mobile apps in order to improve the quality of their applications. Due to the variety of device types, OS and firmware changes, carrier and manufacturer customizations, and reliance on other apps and remote services, application quality is becoming more and more crucial while also becoming more complex. Developers, QA, and support staff may execute both automated tests and manual jobs like replicating customer concerns, exploring new functionality, and carrying out human test plans thanks to AWS Device Farm, which speeds up the development process by executing tests on numerous devices. AWS Device Farm also offers significant savings by eliminating the need for internal device labs, lab managers, and automation infrastructure development.


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Ques. 3): Are my application, tests, and other files stored on your servers? How much time?

Answer:

After 30 days, apps and test packages are automatically deleted. Artifacts such as logs, videos, and other recordings are kept for 400 days. Via the Amazon Device Farm GUI or API, you may also decide to delete files and results whenever you choose.


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Ques. 4): How do I choose my equipment? Can I run another test on the same machine?

Answer:

Devices are chosen for Automated Testing from a group known as a device pool. Although certain curated device pools are automatically offered, you can also make your own. All the devices in the designated pool that are appropriate for your application and tests will be subjected to execution of the tests. You choose the desired device for remote access based on its make, model, carrier option, and operating system version. Afterwards, if desired, you can upload applications and other files and modify other device settings. The display of the accessible device that matches your request is subsequently displayed in your browser via Device Farm. After that, you can interact with the gadget and take screenshots and videos.


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Ques. 5): I test using an automation framework. Which frameworks do you support?

Answer:

Currently, we support Appium Java JUnit, Appium Java TestNG, Appium Python, Calabash, Instrumentation (Includes JUnit, Espresso, Robotium, and any instrumentation-based tests), UI Automation, UI Automator, and XCTest for testing apps for iOS, Android, and FireOS (Including XCUI and KIF).


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Ques. 6): I want to provide my app access to media or other data. How can I go about doing that?

Answer:

A .zip archive that you submit can be up to 4 GB in size. On iOS, it will be extracted to your app's sandbox; on Android, it will be extracted to the root of external memory. We will automatically put the file into the directory appropriate for the OS version for Android expansion files (OBB).

 

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Ques. 7): What is a test report for an Amazon Device Farm?

Answer:

Pass/fail information, crash reports, test logs, device logs, screenshots, videos, and performance statistics are all included in AWS Device Farm test reports. Reports provide both high-level statistics like the frequency of a specific fault and detailed per-device data. Results from Remote Access include a video of the session as well as logs.


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Ques. 8): What is a device minute?

Answer:

The billing unit is a device minute. Device minutes are the number of minutes it takes to install, run, and remove your app and tests from each device you've chosen for your test run. No matter the equipment, test, or application type, the unit price is fixed. Only tests with no device or system faults are charged for device minutes. Similar to this, device minutes for Remote Access sessions are calculated from the time it takes to configure a device to your specifications until all of your installed apps and data are completely removed from the device.


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Ques. 9): What does AWS Device Farm's desktop browser testing entail?

Answer:

You may run your Selenium tests on several desktop browsers and browser versions that are hosted in the AWS Cloud thanks to Device Farm. For Selenium testing, Device Farm uses a client-side execution approach, meaning that while your tests run locally on your workstation, they communicate with browsers hosted on AWS Device Farm via the Selenium API.

 

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Ques. 10): What is a minute of instance?

Answer:

The billing unit for Device Farm's desktop browser testing is an instance minute. The time it takes to run your tests on each of the browser instances you've chosen for your test run is measured in instance minutes. No matter which browser or version of the browser you choose, the price per unit remains at $0.005. Whether the EC2 instance hosting the browser is started, initialised, or shut down, there are no additional fees from our end.

 

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Ques. 11): You alter my app, right?

Answer:

On iOS, we resign the app and swap out the embedded provisioning profile with a wildcard profile. If you give us the information, we will include auxiliary data in the application package before installation so that it is available in the sandbox for your programme. Some rights are removed when the iOS app is resigned. Related Domains, Game Center, HealthKit, HomeKit, Wireless Accessory Setup, In-App Purchasing, Inter-App Audio, Apple Pay, Push Notifications, and VPN Configuration & Control are included in this.

We shut off the Android app. Functionality that rely on the app signature, such the Google Maps Android API, may be broken as a result. Additionally, it might activate anti-tampering and anti-piracy features offered by goods like DexGuard. For built-in tests, we may modify the manifest to include permissions required to capture and save screenshots.

 

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Ques. 12): Can I experiment with various carrier connections and setups?

Answer:

While testing actual carrier connections is not possible, the network shaping functionality allows you to mimic different connection kinds and circumstances. You can choose from pre-made network profiles like "3G" or "Lossy LTE" when scheduling a run, or you can design your own by adjusting factors like throughput, jitter, and loss. During your tests, the profile you select will be used to shape and modify the WiFi communication from the device. By altering network parameters in your test scripts, you can emulate dynamic environments as well.

 

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Ques. 13): How long will it be before my test actually begins?

Answer:

Tests are immediately added to a queue and begin running shortly after. In the event that one or more devices are unavailable, test execution for those devices will be put on hold until they are. The other devices in your test run will continue to undergo testing.

 

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Ques. 14): Can I test my web application on actual mobile devices using the Amazon Device Farm?

Answer:

Yes. Appium is supported by Device Farm for web app testing on actual mobile devices. For additional information, see our Appium Web Testing developer guide. Please be aware that Device Farm uses a server-side execution mechanism for testing on actual mobile devices; as a result, you must upload your tests to the service.

 

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Ques. 15): What is Fuzz used for?

Answer:

After launch, Fuzz will begin testing your UI for flaws. It quickly streams arbitrary user input (touches, swipes, keyboard input) to your app. The quantity of events, the interval between events, and the randomization seed can all be customised. The same series of events will occur when the same seed is used in all test runs.

 

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Ques. 16): Does AWS Device Farm have an API that can be used to perform tests and retrieve the results?

Answer:

Yes. We offer a Gradle plugin that works with Android Studio and a plug-in for the Jenkins continuous integration system. Also, all console capabilities, including setting up a test and receiving test results via an API, are programmatically supported by AWS Device Farm.

 

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Ques. 17): My tests generate and save additional log files. Will I see them in my AWS Device Farm reports?

Answer:

The report will contain any log entries that you write to logcat (for Android) or the device log (for iOS). Despite the fact that you can use the device or device host's Internet connection to transfer files via your test script, AWS Device Farm does not gather any unusual logs or other artefacts.

 

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Ques. 18): What if I need to add or delete device slots because my testing requirements change?

Answer:

Any time you add device slots, they become immediately usable for you. Also, you have the option to at any time terminate your subscription for one or more device slots; the termination will take effect on the day of your subsequent renewal (the day of the month that you purchased your first active device slot).

 

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Ques. 19): How do device slots and the unmetered plan work?

Answer:

Unlimited testing and remote access are available with unmetered options starting at $250 per month. Unmetered prices start at $250 per slot per month and depend on how many device slots you buy for each usage category (such as automated testing or remote access) and device family (such as Android or iOS). Concurrency is corresponding to device slots.

Device Farm will conduct your tests on up to ten devices at a time until all tests are finished on your chosen devices, for example, if you buy ten automated test Android device slots and arrange a run on 100 Android smartphones. You may obtain your findings more quickly if you bought additional slots. You are charged a set fee of $250 per device slot per month, regardless of how many tests or remote access sessions you have. Your membership for one or more device slots can be cancelled at any time, and the cancellation will take effect on the date of your subsequent renewal (the day of the month that you purchased your first active device slot). Through the Amazon Device Farm UI, AWS Command Line Interface (AWS CLI), or AWS Device Farm API, you can buy slots.

 

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Ques. 20): Can I use both personal and public devices at once?

Answer:

Yes. You can choose between your private and public devices when configuring a test run or remote access session. Device pools made up of both private and public devices are another option.

 

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November 13, 2022

Top 20 AWS Wavelength Interview Questions and Answers

  

 

Ques. 1): AWS Wavelength: What is it?

Answer:

For developers to innovate and create a new class of apps, AWS Wavelength blends the high bandwidth and ultralow latency of 5G networks with AWS computation and storage capabilities. In collaboration with Verizon in the US, KDDI in Japan, SK Telecom in South Korea, Vodafone in the UK and Germany, and Bell in Canada, Wavelength Zones are accessible.

 

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Ques. 2): What types of AWS Wavelength workloads are examples?

Answer:

Emerging interactive applications such video inference using machine learning (ML), live video streaming, and game streaming. For end users and devices connecting over mobile networks, these workloads demand computing and storage near to the edge. Additionally, to meet the demands for application performance, use cases like industrial automation, smart cities, IoT, and autonomous cars need data processing and retrieval near to the edge. AWS Wavelength and Wavelength Zones can help with any of these use cases.

 

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Ques. 3) What is exactly the wavelength zone?

Answer:

Application traffic can reach application servers running in Wavelength Zones without leaving the mobile providers' network thanks to AWS infrastructure deployments called Wavelength Zones, which embed AWS compute and storage services within telecommunications providers' data centres at the edge of the 5G network. Customers are able to fully utilise 5G networks since the delay brought on by several hops to the internet is avoided. Wavelength Zones bring AWS to the 5G edge and provide a unified developer experience for all 5G networks worldwide. Additionally, Wavelength Zones enable developers to utilise the same well-known AWS services, APIs, tools, and capabilities they currently use today to create the next generation of ultra-low latency apps.


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Ques. 4): Why should I use the AWS Wavelength?

Answer:

Because computation and storage are located directly within the 5G networks of the telecom providers, AWS Wavelength enables you to connect your device on the 5G network to the resources for your application on the AWS cloud with the fewest number of network hops. By avoiding longer paths or network congestion that would be needed to reach application resources outside of the 5G network, this decreases latency.

This makes it possible for new sorts of latency-sensitive, compute-intensive applications. For instance, smart industrial robots monitoring and responding to plant conditions in a hazardous manufacturing environment, a fleet of autonomous vehicles interacting with road sensors to prevent collisions, or retailers delivering tailored promotions to customers' mobile phones in real time as they pass product displays.


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Ques. 5): What are the benefits of AWS Wavelength?

Answer:

Wavelength brings the power of AWS to the network edge to enable latency sensitive use cases requiring near real-time responses. Processing at the network edge can help avoid transmitting large volumes of data over the network provider’s infrastructure, and offload processing from mobile device hardware.


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Ques. 6): What kinds of Amazon EC2 instances are offered?

Answer:

For edge workloads, Wavelength supports the instance types t3.medium, t3.xlarge, and r5.

For applications needing efficient general purpose computing, use 2xlarge; g4dn.

2xlarge for GPU-required applications like edge ML inference and gaming streaming. EBS is used to power all EC2 instances. The parent Region houses Amazon Machine Images (AMIs) and snapshots of EBS volumes. You can only purchase On-Demand EC2 Instances; Reserved Instances are not available for purchase in Wavelength Zones.


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Ques. 7): Can I deploy apps to 4G/LTE devices using Wavelength Zones?

Answer:

Yes. Application servers on Wavelength Zones are accessible by 4G/LTE mobile phones and other devices connected through 4G/LTE networks. These apps gain advantages by using the co-located computational architecture of the mobile network.


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Ques. 8): Who should use AWS Wavelength?

Answer:

When you need to build high-performance apps that are accessed by mobile end users and devices that require single digit millisecond latency, you should utilise AWS Wavelength. Wavelength enables AWS companies to reach end users with millisecond-level connections when developing public apps like game streaming and augmented/virtual reality (AR/VR) services, improving user experience and application speed.

Wavelength offers low-latency solutions for use cases including the Internet of Things (IoT), live video creation, and industrial automation to AWS commercial clients. Customers may utilise Wavelength to execute low-latency operations and processing precisely where their data is created if they have demands for edge data processing such as image and video recognition, inference, data aggregation, and responsive analytics.


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Ques. 9): How can I begin using AWS Wavelength?

Answer:

Wavelength Zones are extensions of an AWS Region, which reduces the requirement for you to redesign your application's architecture in order to minimise latency by letting you continue to utilise the same AWS tools and capabilities you do today. All you have to do is choose your Amazon Virtual Private Cloud (VPC) in the VPC console if you already have an application running. Select the option to build a subnet in a Wavelength Zone from the Actions menu. Wavelength Zones are enabled by default for all carriers and locations accessible in the Region, albeit you can choose only a few. You may create subnets for each Wavelength Zone using the wizard.


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Ques. 10): Is it possible to reserve Amazon EC2 capacity in a Wavelength Zone?

Answer:

To reserve space for your Amazon EC2 instances in a Wavelength Zone, utilise On-Demand Capacity Reservations.


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Ques. 11): Which AWS services are offered by AWS Wavelength?

Answer:

In Wavelength Zones, you may set up Amazon EC2 instances, Amazon Elastic Block Store (EBS) volumes, Amazon VPC subnets, and carrier gateways. Additionally, you may employ services that coordinate or interact with EC2, EBS, and VPC. These include AWS CloudFormation, Amazon EC2 Auto Scaling, Amazon EKS and ECS clusters, AWS CloudWatch, AWS CloudTrail, and AWS EC2 Systems Manager. The Wavelength services are a part of a VPC that is connected to an AWS Region through a dependable, high-bandwidth connection, making it simple to access services like Amazon DynamoDB and Amazon Relational Database Service (RDS).


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Ques. 12): What pricing schemes do Wavelength Zones for Amazon EC2 support?

Answer:

In Wavelength Zones, there are two methods to pay for Amazon EC2 instances: Savings plans and on-demand.


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Ques. 13): How should I think about when to use AWS Wavelength, AWS Local Zones, or AWS Outposts for applications requiring low latency or local data processing?

Answer:

Wherever they are deployed, AWS assists customers in providing a consistent experience to serve applications with low latency requirements or local data processing needs.

By extending AWS infrastructure, services, APIs, and tools to 5G networks, AWS Wavelength is intended to enable ultra-low latency applications to 5G devices. In order to assist developers in creating new applications for 5G end users needing single-digit millisecond latency, such as IoT devices, game streaming, autonomous cars, and live video creation, Wavelength embeds storage and computing into telecom providers' 5G networks.

AWS Local Zones are a new kind of AWS infrastructure created to handle workloads that need single-digit millisecond latency in more places, such as virtual desktop apps with heavy graphics. Some customers may not want to manage their own on-site data centre, while others could choose to completely do away with their nearby data centre. Customers may benefit from operating computing and storage resources closer to end users by using Local Zones without having to own and manage their own data centre infrastructure.

In order to function smoothly alongside customers' AWS workloads, AWS Outposts is made for workloads that must remain on-premises owing to latency limitations. AWS Outposts are fully managed and configurable compute and storage racks built with AWS-designed hardware, which allows customers to run compute and storage on-premises while seamlessly connecting to AWS’s broad array of cloud services.

 

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Ques. 14): How can I get help for using AWS Wavelength to operate AWS services?

Answer:

To obtain assistance with AWS services operating in Wavelength Zones, open a case with AWS Support.


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Ques. 15): How do I see my usage in Wavelength Zones?

Answer:

Utilization may be filtered by Availability Zone, including Wavelength Zones, using the AWS Cost Explorer.

 

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