Last Updated: Sep 16, 2026
No. of Questions: 55 Questions & Answers with Testing Engine
Download Limit: Unlimited
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Short on study time before your 70-357 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.
| Certification Vendor: | Microsoft |
|---|---|
| Exam Name: | Developing Mobile Apps |
| Exam Number: | 70-357 |
| Passing Score: | 700 (on a 1000 scale) |
| Related Certifications: | MCSA: Web Applications |
| Exam Format: | Case studies, Multiple choice, Multiple response, Drag and drop |
| Exam Duration: | 150 minutes |
| Available Languages: | Spanish, German, English, Korean, Chinese (Simplified), French, Japanese |
| Exam Price: | USD 165 (historical, varies by region and date) |
| Certificate Validity Period: | Retired (no longer available; certification was historically valid for 2 years) |
| Real Exam Qty: | Approximately 40–60 |
| Recommended Training: | UWP and Windows App Development learning paths Microsoft Learn (Legacy exam training resources) |
| Exam Registration: | Microsoft Certification Dashboard Pearson VUE Microsoft Exams |
| 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/ |
| Section | Objectives |
|---|---|
| Topic 1: Deployment and security | - Implement authentication and authorization - Ensure application security best practices - Package and deploy mobile applications |
| Topic 2: Debugging, testing, and performance optimization | - Implement testing strategies - Debug application issues - Optimize performance and responsiveness |
| Topic 3: Design and develop mobile apps | - Select appropriate app models and frameworks - Design application UI/UX for mobile devices - Plan application architecture |
| Topic 4: Implement application functionality | - Implement navigation and app lifecycle management - Develop client-side logic - Integrate APIs and services |
| Topic 5: Data storage and management | - Work with remote data sources - Use local storage mechanisms |
The Microsoft Developing Mobile Apps exam (exam code 70-357) 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 70-357 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 Deployment and security, Design and develop mobile apps, and Debugging, testing, and performance optimization. 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.
Drag and Drop Question
You need to download the bank statements and alert the user when the download is complete.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Correct Answer:

Drag and Drop Question
You need to meet the storage requirements.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of the answer area and arrange them in the correct order.
Correct Answer:

Drag and Drop Question
You are developing a Universal Windows Platform (UWP) app that needs to run on multiple types of devices.
The app must detect whether a device has a physical camera button.
For devices that have a physical camera button, you need to ensure that the app continues to function.
How should you complete the code? To answer, drag the appropriate code segments to the correct location or locations.
Each code 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.
Correct Answer:

You need to create a storyboard for a Universal Windows Platform (UWP) app that you are designing.
For which application does Microsoft provide design templates for UWP apps?
Correct Answer: D 🗳️
Your are developing a Universal Windows Platform (UWP) app that uses XAML and C#.
The app must use the Model-View-ViewModel (MVVM) pattern.
The user interface (UI) triggers an event.
You need to bind the event to a view model method.
What should you do?
Correct Answer: C 🗳️
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