70-357 Developing Mobile Apps Exam Guide: Scope, Retirement, and Preparation Decisions
Microsoft identified 70-357 as “Developing Mobile Apps,” and its official preparation session targeted people already experienced in mobile-app development. This guide helps you answer the most important practical question first: whether 70-357 is still an exam you can pursue, or whether your time is better spent validating related skills through a current Microsoft role-based certification. It also gives former candidates a sensible way to use the available preparation material without treating outdated content as a current exam blueprint.
What did 70-357 validate?
70-357 was a Microsoft exam focused on developing mobile apps. The official preparation session describes its audience as people experienced with developing mobile apps and says the session reviewed the exam’s key topics, preparation resources, and test-taking techniques. The available official evidence does not provide a complete current skills outline or detailed domain weighting.
The most defensible interpretation is that this was an implementation-oriented assessment for developers who already understood mobile application development. It should not be presented as a beginner introduction, a general software-development exam, or a current measure of modern mobile frameworks without supporting documentation.
Microsoft’s archived preparation material is useful for identifying the exam’s broad subject area, but it is not enough to reconstruct exact objectives. Do not infer a list of measured skills, question types, scoring rules, or platform requirements from the exam number alone.
Who was the intended candidate?
The official session was designed for people experienced with Developing Mobile Apps who were interested in taking 70-357. That makes hands-on mobile development the relevant starting point, rather than memorizing terminology without being able to reason through application-building tasks.
A practical candidate profile would therefore include a developer who could study an existing mobile codebase, understand its architecture and behavior, and investigate why an implementation choice might succeed or fail. Those are preparation recommendations, not Microsoft-stated prerequisites. The supplied official sources do not state a formal prerequisite for 70-357.
Is 70-357 still available?
No current attempt should be planned around 70-357 without first checking Microsoft’s official retirement information. Microsoft’s retirement policy states that retired exams can no longer be taken and that associated certifications or credentials can no longer be earned after the retirement date. The supplied Microsoft retirement announcement states that all remaining MCSA, MCSD, and MCSE exams retired on January 31, 2021.
The Microsoft Q&A page records a December 2020 question asking whether the Mobile Apps exam 70-357 would be extended beyond January 31, 2021. The page does not provide an authoritative extension notice; its answer redirects certification and scheduling questions to Microsoft’s dedicated support forums. It should not be used as evidence that the exam remained available.
Microsoft’s current retirement guidance also says that reference links to retired exam-detail pages may continue for 12 months and that training content may remain available after exams retire. Continued access to a video, article, or course is therefore not proof that a candidate can register for the exam.
What does retirement mean for existing records?
If a certification was already earned, Microsoft states that it remains on the learner’s Microsoft Learn transcript after the relevant exam retires. The retirement of an exam does not erase an already earned credential, although Microsoft’s earlier MCSA, MCSD, and MCSE announcement explains that such a certification could later move from the active section to the inactive section of the transcript.
This distinction matters when reviewing an old résumé or transcript. A completed credential and an available examination are separate issues: the former may remain recorded, while the latter may no longer be attainable. Confirm the status of a personal credential in the Microsoft Learn profile rather than relying on a third-party exam listing.
Should a candidate look for a replacement?
Candidates who want a current Microsoft credential should investigate a role-based certification that matches their present work, rather than assume that an archived 70-xxx exam has a direct one-to-one replacement. Microsoft published a mapping article to help orient candidates from selected 70-xxx exams toward newer role-based certifications, but the supplied mapping table does not identify a direct replacement for 70-357.
Use the mapping article as background on Microsoft’s transition from older technology-focused exams to role-based certifications. Then start with the current Microsoft certification catalogue and compare its role, technology scope, and skills measured with the work you want to perform. This is a current-path recommendation, not a claim that a particular newer certification replaces 70-357.
What official evidence is available for the exam scope?
The strongest official scope evidence is Microsoft’s archived “Cert Exam Prep: Exam 70-357: Developing Mobile Apps” session. Microsoft says the session reviewed topics covered by the exam, offered test-taking techniques, and surveyed resources for final preparation. It was led by a Microsoft Certified Trainer and was intended for experienced mobile-app developers.
The session is useful as an orientation source, especially for confirming the exam name and broad audience. It does not supply enough verified detail to publish domain percentages, a definitive objective list, an exam duration, a passing score, a question count, supported languages, or a delivery format.
The official preparation page explains that study guides normally summarize exam topics and link to additional resources for technical exams. If a current official study guide or exam-detail page is unavailable, treat the absence as a research limitation rather than filling the gap with claims from practice-test sellers or archived catalogues.
Are there blueprint weights for 70-357?
No verified blueprint weights were supplied for 70-357. Accordingly, this guide does not assign percentages to mobile-development topics or compare unlabeled portions of the exam. A percentage is meaningful only when it is attached to the exact official exam domain that published it.
For study planning, replace invented weighting with an evidence log. Record each topic confirmed by an official source, each topic you can demonstrate in code, and each topic that remains uncertain. Spend additional preparation time on weak, relevant skills, but label that allocation as your own study decision rather than as an exam-domain percentage.
How should you prepare when the official blueprint is incomplete?
Use a verification-first sequence: establish whether the exam can still be taken, collect the official material that remains available, assess your mobile-development baseline, and practise explaining implementation decisions. This approach protects your study time and avoids confusing a historical preparation session with a current exam specification.
Start by checking Microsoft’s retired-exam page and the relevant certification or exam-detail area. If 70-357 is not listed as schedulable, stop treating registration as a near-term objective. If your goal is a current credential, move to role-based certification research; if your goal is historical knowledge, continue with the archived session as context only.
Next, watch or review the official 70-357 preparation session actively. Create notes under three headings: topics mentioned, resources recommended, and concepts you cannot yet explain. Do not simply copy the presentation. Turn each item into a practical task, such as tracing an app workflow, identifying a likely failure point, or comparing two implementation approaches.
Finally, use Microsoft Learn’s general preparation guidance to locate any available study guides, learning paths, modules, exam-preparation videos, and practice assessments for a current target. Microsoft describes Learn modules as interactive, self-paced skill builders and notes that practice assessments are available only for some exams. Availability for 70-357 should not be assumed.
A sensible study sequence for an experienced developer
Experienced candidates usually benefit from moving from diagnosis to implementation, then to review. Begin with a baseline rather than reading every available resource in order. This reveals whether your gap is conceptual, platform-specific, architectural, or simply a lack of familiarity with older Microsoft terminology.
Phase one is scope control. Write down the exact objective you are pursuing: a historical understanding of 70-357, completion of an already planned legacy path, or a current Microsoft credential related to your role. These goals require different research decisions, and mixing them produces inefficient study plans.
Phase two is technical reconstruction. For every verified or strongly evidenced topic, create a small learning exercise. Read the relevant documentation, implement the behavior, introduce a controlled fault, and record how you diagnosed it. A working explanation is more valuable than a page of copied definitions.
Phase three is decision review. Ask why one design would be selected over another, what constraints affect the choice, and how you would test the result. The archived session’s emphasis on key topics and test-taking techniques supports this review-oriented approach, but it does not prove that any particular exercise appears on an exam.
Phase four is readiness checking. Use official practice material if it exists for your chosen current exam. Review incorrect answers by underlying concept, not by memorizing the wording. If no official assessment exists, use implementation reviews, documentation-based questions, and code walkthroughs as informal checks.
How to use the archived video without overtrusting it
Treat the official video as a historical briefing, not a promise of current exam coverage. It can help you understand how Microsoft framed 70-357, identify the broad subject area, and locate preparation advice, but its 2016 publication context makes independent verification especially important for any technology-specific conclusion.
Pause after each major topic and write a short explanation in your own words. Then identify which part of the explanation is a general software principle and which part depends on a particular Microsoft product or development stack. This separation helps prevent old platform assumptions from being carried into a current certification plan.
Use the session’s resource references as leads, not as automatic requirements. Check whether each linked resource still exists, whether it describes the same product generation, and whether Microsoft currently associates it with a live exam. An archived resource can remain educationally useful while no longer representing a current assessment target.
What should a practical roadmap look like?
A useful roadmap has four checkpoints: status, scope, skills, and next action. The first checkpoint prevents you from preparing for an unavailable exam. The second limits research to evidence-supported topics. The third tests whether you can apply what you studied. The fourth converts the result into either a current registration plan or a revised learning target.
Checkpoint one: confirm status through Microsoft’s retirement policy and official certification pages. Microsoft says candidates preparing for an exam scheduled for retirement should take it before the retirement date and that the exam and associated credential cannot be earned afterward. For 70-357, the supplied retirement announcement identifies January 31, 2021 as the retirement date for remaining MCSA, MCSD, and MCSE exams.
Checkpoint two: build a source-backed scope sheet. Put “Developing Mobile Apps” at the top, note the intended experienced audience, and add only topics you can tie to official material. Leave unknown fields blank. In particular, do not add a score, duration, number of questions, domain weights, prerequisites, languages, or delivery method unless an official source specifically verifies it.
Checkpoint three: complete applied reviews. For each study topic, explain the problem, implement or inspect a solution, test expected and failure behavior, and document the reasoning. If you cannot perform the task without searching for every step, mark it for further study. This is a practical readiness standard, not a Microsoft pass criterion.
Checkpoint four: choose the next action. A historical learner can finish the archived session and preserve notes about the technology context. A certification candidate should select a current role-based exam and rebuild the roadmap around that exam’s live study guide and skills outline. A transcript holder should verify the credential record and decide whether a current certification better represents present skills.
A compact multi-stage plan
In the first stage, spend one study session on status and scope. Locate the official retirement information, review the archived preparation session, and create the source-backed scope sheet. The deliverable is not a completed study chapter; it is a clear decision about whether 70-357 is a live registration objective.
In the second stage, work through the confirmed mobile-development concepts in a deliberate order: application structure, implementation choices, testing behavior, and troubleshooting reasoning. The order is a recommendation for learning efficiency, not an official exam sequence. Use documentation and small exercises rather than relying on recall drills.
In the third stage, perform a closed-book review. Explain the main concepts, inspect a representative implementation, identify likely defects, and justify corrective action. Afterwards, reopen the documentation and correct your notes. This exposes gaps more reliably than rereading material that already feels familiar.
In the final stage, make the credential decision. If the exam is retired, do not spend money or time on claims that a third-party listing can provide a valid attempt. Redirect the effort to a current Microsoft certification or retain the work as technical study, depending on your objective.
Which preparation mistakes should you avoid?
The most damaging mistake is assuming that an exam page, video, or dump listing proves current availability. Microsoft’s policy is the authority on retirement, and the supplied announcement states that the relevant legacy exams retired. Availability, historical scope, and study usefulness must be checked separately.
Do not build a study calendar around unofficial claims about question counts, passing scores, exam duration, languages, or delivery. None of those details is verified in the supplied research for 70-357. Unsupported precision creates false confidence and can send a candidate toward the wrong preparation method.
Do not treat exam dumps or leaked-question collections as a substitute for competence. Memorizing recalled items cannot establish that you can develop, test, or troubleshoot a mobile application, and it does not resolve the more basic question of whether Microsoft still permits the exam to be taken.
Avoid copying an old technology stack into a current certification plan without checking the live exam’s objectives. Microsoft explains that role-based certifications are maintained around current job roles and technology changes. That is a reason to compare historical 70-357 material with a current study guide, not a reason to claim that any particular modern exam covers the same skills.
Finally, do not confuse a completed legacy certification with an active exam pathway. Microsoft states that an earned certification can remain on a transcript after retirement, while retired exams and associated credentials can no longer be earned. Keep those two outcomes distinct in your career records and planning.
How can you detect unreliable preparation material?
Reliable material should identify its official publisher, connect claims to a named exam objective, and distinguish historical information from current registration guidance. Material that promises guaranteed success, presents unexplained exact statistics, or offers memorized question sets should be treated as unsuitable for evidence-based preparation.
Check every claim against Microsoft Learn where possible. If a resource says 70-357 is available, look for an official scheduling path rather than accepting the statement. If it gives a blueprint percentage, locate the official domain label and source. If neither exists, remove the claim from your plan.
How would scheduling work for a live Microsoft exam?
The general Microsoft process starts from a certification overview or exam-detail page, where a candidate selects “Schedule exam” and then chooses the available provider. Microsoft’s current guidance says candidates taking an exam independently or through training normally select Pearson VUE, while Certiport is directed to students, academic-institution members, and Microsoft Office Specialist candidates. These instructions do not establish that 70-357 is schedulable.
For a live exam, verify the provider shown on the current official detail page before making arrangements. Microsoft says certification exams can be scheduled no more than 90 days in advance and that a Learn Profile may be required. The supplied sources do not provide a current 70-357 appointment option, so no booking claim should be made for this exam.
If online delivery is offered for a live exam, Microsoft advises candidates to run a system pre-check and ensure the computer and exam area meet security requirements. A test center may be preferable if you want a pre-configured environment. These are general delivery choices, not verified delivery details for retired 70-357.
Request any needed accommodation before scheduling so the provider has time to review it. Also ensure the legal name in the Learn Profile matches legal identification, as Microsoft’s registration guidance warns that a mismatch can prevent the candidate from taking the exam.
What should you do before attempting to schedule?
First, sign in to the official Microsoft certification area and search for a live exam-detail or certification page. Second, confirm that a schedule button and provider are actually offered. Third, review the provider’s available dates and delivery choices. If the page is only an archived reference or has no scheduling route, stop there and select a current objective instead.
What is the best next step for a 70-357 reader?
The best next step depends on your status: verify an existing credential, confirm that 70-357 cannot be treated as a current registration target, or select a modern role-based certification aligned with your work. Use the archived Microsoft session to understand the historical exam context, but base any new certification plan on a live official study guide and skills outline.
If you are researching 70-357 for historical or technical reasons, watch the official preparation session and create an annotated scope sheet. Mark every item as confirmed, contextual, or unresolved. Then study the underlying mobile-development concepts through implementation and troubleshooting exercises rather than attempting to recreate an undocumented exam.
If you were planning to earn a legacy MCSA, MCSD, or MCSE path, review Microsoft’s retirement announcement and mapping guidance. The supplied announcement says the remaining associated exams retired on January 31, 2021, while Microsoft’s retirement policy says associated certifications cannot be earned after retirement. A current role-based route is the more practical planning direction.
If you already earned the relevant certification, check your Microsoft Learn transcript and record the credential accurately. Microsoft states that earned certifications remain on the transcript after retirement. Add a current certification only after comparing its official role and measured skills with the work you want employers or clients to see.
Do not purchase material solely because it uses the 70-357 label. Establish the official status first, discard unsupported exam statistics, and invest study time in demonstrable mobile-development capability or a current Microsoft objective. That sequence gives you a defensible preparation record and avoids treating obsolete exam information as a present-day promise.
A final decision checklist
Confirm the exam name as Microsoft’s “Developing Mobile Apps.” Confirm the intended audience as experienced mobile-app developers. Check the official retirement policy before planning registration. Record that no verified blueprint weights or detailed current delivery facts are available in the supplied research. Choose historical study, transcript verification, or a current role-based certification as your next action.
For a current certification target, open its official detail page, download or review the study guide, map each measured skill to a learning resource, and schedule only after confirming the provider and any accommodation needs. Microsoft’s preparation guidance also points candidates toward self-paced learning, instructor-led training, exam-preparation videos, and practice assessments when those resources are available.
Conclusion
70-357 is best approached as a retired, historically documented Microsoft mobile-app development exam rather than as a normal current registration target. The official evidence confirms its name, experienced developer audience, and preparation-session focus, but it does not support a detailed blueprint or modern delivery specification. Verify any existing transcript entry, avoid unsupported dumps and statistics, and redirect new certification effort toward a current role-based exam whose official objectives match the skills you need to demonstrate.
