Try and practice the latest Microsoft : 070-357 real questions & answers

Last Updated: Sep 07, 2026

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Short on study time before your 070-357 exam? The 55 practice questions at Actual4Cert concentrate your effort on exactly what the Microsoft Developing Mobile Apps exam measures, and every set is kept current for 2026.

Microsoft 070-357 Exam Overview:

Certification Vendor:Microsoft
Exam Name:Developing Mobile Apps
Exam Number:70-357
Real Exam Qty:Approximately 40–60
Exam Format:Multiple response, Drag and drop, Case studies, Multiple choice
Passing Score:700 (on a 1000 scale)
Exam Price:USD 165 (historical, varies by region and date)
Related Certifications:MCSA: Web Applications
Exam Duration:150 minutes
Certificate Validity Period:Retired (no longer available; certification was historically valid for 2 years)
Available Languages:German, French, English, Spanish, Korean, Chinese (Simplified), Japanese
Recommended Training:UWP and Windows App Development learning paths
Microsoft Learn (Legacy exam training resources)
Exam Registration:Pearson VUE Microsoft Exams
Microsoft Certification Dashboard
Sample Questions: DOWNLOAD DEMO
Exam Way:Online proctored or authorized test center (historically via Pearson VUE)
Pre Condition:No strict prerequisites; intended for developers with experience in HTML5, JavaScript, and mobile application development concepts.
Official Syllabus URL:https://learn.microsoft.com/en-us/credentials/certifications/exams/70-357/

Microsoft 070-357 Exam Syllabus Topics:

SectionObjectives
Topic 1: Debugging, testing, and performance optimization- Debug application issues
- Implement testing strategies
- Optimize performance and responsiveness
Topic 2: Implement application functionality- Develop client-side logic
- Implement navigation and app lifecycle management
- Integrate APIs and services
Topic 3: Data storage and management- Use local storage mechanisms
- Work with remote data sources
Topic 4: Design and develop mobile apps- Select appropriate app models and frameworks
- Design application UI/UX for mobile devices
- Plan application architecture
Topic 5: Deployment and security- Ensure application security best practices
- Implement authentication and authorization
- Package and deploy mobile applications

Frequently Asked Questions About Microsoft Developing Mobile Apps

The Microsoft Developing Mobile Apps exam (exam code 070-357) is the official Microsoft exam that leads to the MCSA: Web Applications (legacy / retired) certification, sitting at the Associate level of the Microsoft certification track. It is also connected with MCSA: Web Applications. If this is the credential you are working toward, the 55 practice questions at Actual4Cert map directly to its objectives.

The Microsoft Developing Mobile Apps exam includes Approximately 40–60 questions, and you have 150 minutes to complete them. Divide the time limit by the question count and you get a tight average pace per item, so train yourself to flag time-consuming questions and return to them later instead of getting stuck. Before test day, run at least one full timed session in the Actual4Cert test engine under the same limits — the clock should never surprise you.

The passing score for Microsoft Developing Mobile Apps is 700 (on a 1000 scale), and the official registration fee is USD 165 (historical, varies by region and date). A failed attempt means paying that fee in full again, so your preparation budget deserves the same attention as your study plan. A practical rule: book your exam date only after you can finish a Actual4Cert practice test comfortably above the passing score more than once.

According to Microsoft, candidates should meet the following before registering: No strict prerequisites; intended for developers with experience in HTML5, JavaScript, and mobile application development concepts.. Requirements can change, so confirm the latest details on the official exam page before you register.

You can register for the Microsoft Developing Mobile Apps exam through the official channels below:

Exam delivery: Online proctored or authorized test center (historically via Pearson VUE).

Microsoft lists the following official training options for this exam:

Formal training builds the theory; pair it with the 55 practice questions from Actual4Cert to find out whether you are genuinely ready for the exam.

Yes. A free PDF demo of the 070-357 practice questions is available to download, so you can judge the format and quality before paying anything. Every purchase also includes 365 days of free updates, and if your product expires you can extend the update service at a 50% discount.

Your order is covered by a conditional 100% money-back guarantee: if you take the corresponding exam within 60 days of purchase and do not pass, you may apply for a full refund. Exams taken within 3 days of purchase are not eligible, nor are free materials or expired orders, and the candidate name must match the payer name. To claim, submit a scanned enrollment slip and your official Score Report PDF within 2 days of the exam; claims are processed within 7 days. Prefer to keep studying? You can instead exchange your purchase for two free products of equal value while keeping the update service on your original one. Delivery itself is immediate: your product unlocks for instant download right after payment and a copy is emailed to you within a minute — if nothing arrives within 2 hours, contact our support team. There is no limit on the number of computers you can install it on.

The Microsoft Developing Mobile Apps blueprint is divided into 5 major domains, starting with Debugging, testing, and performance optimization, Design and develop mobile apps, and Implement application functionality. The full breakdown, including every subdomain and its weighting, is listed in the Exam Topics section above — review it against your own weak areas before scheduling the exam.

Microsoft Developing Mobile Apps Sample Questions:

Question #1

You need to configure authentication for the app.
Which two technologies should you use? Each correct Answer presents part of the solution.

  • A. Windows Kerberos
  • B. Azure Active Directory
  • C. Windows Hello
  • D. Microsoft Passport
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Question #2

Hotspot Question
You are developing an app that displays photos.
You need to create a method that displays Informational text when a user hovers the porn tor over it photo.
How should you complete the method? To answer, select the appropriate code segment from each list m the answer area.

Reveal Solution  Discussion  0

Correct Answer:

Question #3

You are developing a Universal Windows Platform (UWP) app by using Microsoft Visual Studio.
The app will use the AdMediatorControl control.
You need to select the ad providers that will be used by the app.
What should you add to the app?

  • A. Reference
  • B. Connected Service
  • C. Service Reference
  • D. Azure API App Client
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Question #4

Hotspot Question
You need to properly handle the size of the user interface objects.
How should you complete the method? To answer, select the appropriate code segment from each list in the answer area. NOTE: Each correct selection is worth one point.

Reveal Solution  Discussion  0

Correct Answer:


Topic 2, Background
You are developing a Universal Windows Platform (UWP) app for LitWare, Inc. that will assist video artists. The app allows artists to create videos, share videos through other mobile apps, and upload the videos through LitWare, Inc's web services. What helps set LitWarelnc's app apart from competitors is their focus on speed and performance.
Business requirements
Support many devices
Users may have phones, tablets, or laptops. The app must support all devices with a fluid layout that grows off-screen and adapts to each device.
Record video
Users must be able to record videos and view them in their videos library .
The app must display information about the recorded video .
Users must be able to edit the upload queue in the app.
Branding
The app must allow deferral and scheduling of video uploads.
Users must be able to view the status of video uploads.
Any videos created with this app or shared with this app must be uploaded without user interaction.
Download video
The app must have the option to automatically download videos.
Users must be able to initiate downloading of videos.
Share video
The app must allow be allowed to receive videos from other apps.
Technical requirements
Application structure
Technical requirements
Support multiple devices
The app must support the following:
- Use horizontal layout for larger screens .
- Use vertical layout for smaller screens .
- Use one layout control per view.
The app must be compatible with current and future XBOX app that use C++.
Uploading and downloading
The app must use a background operations to upload and download videos.
Code reuse
The app must use a common pool of XAML resources and custom controls.
All custom controls must use a consistent theme throughout the app.
You must create code that can be reused in C++, C#, JavaScript, whenever possible.
The app must call the background service to avoid duplication of code.
Security
End users must be authenticated using OAuth.
Web services must be authenticated.
Users must have the option to use single sign-on.
Recording
The app must use the microphone and webcam to support audio and video recording. In addition, the app must support the use of the back camera buttons, if present.
Integration:
Other apps must be able to share videos with this app through a Universal Windows Platform (UWP) Architecture and coding style The app must follow the Model-View-ViewModel (MVVM) pattern.
The app's user interface (UI) must be optimized for performance.
The app must use compile time coding techniques over runtime.
Package appxmanifest
Relevant portions of the app files are shown below. Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.

Background Task
Relevant portions of the app files are shown below. Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.

Question #5

Drag and Drop Question
You are developing a Universal Windows Platform (UWP) app. Users can drag and drop images on the screen to share them with then friends.
You need to implement drag and drop for the app. Users must be able to drop images onto a blue rectangle that the app displays.
How should you complete the relevant markup? To answer, drag the appropriate markup segments to the correct targets. Each markup segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

Reveal Solution  Discussion  0

Correct Answer:

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