MockQuestions

Doordash Android Developer Interview Questions

To help you prepare for an Android Developer interview at DoorDash, here are 30 interview questions and answer examples.

DoorDash was written by and published on November 13th, 2021. Learn more here.

Question 1 of 30

What are the earliest and latest versions of Android you have worked with?

How to Answer

Like any other operating system, Android has evolved through many different iterations. Each version is designated by a number that can contain up to three decimal places. Each version is also given a nickname such as Cupcake, Donut, Marshmallow, or Oreo. Interviewers at Doordash will ask you about your experience working with the different versions of Android to understand how long you have been programming in this environment and how familiar you are with each version. Knowing about the pedigree and evolution of the operating system will also increase your programming skills and make you more valuable to Doordash.

Written by William Swansen on November 13th, 2021

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DoorDash Android Developer Interview Questions & Answers

  • Discovery

    1. What are the earliest and latest versions of Android you have worked with?

      How to Answer

      Like any other operating system, Android has evolved through many different iterations. Each version is designated by a number that can contain up to three decimal places. Each version is also given a nickname such as Cupcake, Donut, Marshmallow, or Oreo. Interviewers at Doordash will ask you about your experience working with the different versions of Android to understand how long you have been programming in this environment and how familiar you are with each version. Knowing about the pedigree and evolution of the operating system will also increase your programming skills and make you more valuable to Doordash.

      Written by William Swansen on November 13th, 2021

      1st Answer Example

      "I began working in the Android operating systems as early as 2008 with version 1.0, which didn't have a code name. I continued working on versions 2 through 11, which is the latest evolution of the Android operating system. Nicknames for Android such as Gingerbread, Honeycomb, and Jelly Bean were typical for the early versions. However, the nicknames were dropped effective with Android 10.0 released in 2019. Each subsequent version of the Android OS added additional features making the operating system more effective and easier to work with."

      Written by William Swansen on November 13th, 2021

  • Operational

    2. How would you describe Android to someone here at Doordash without a technical background?

      How to Answer

      Interviewers at Doordash will ask you this question for several reasons. The first is to begin the conversation and learn more about your background. How you describe Android will indicate your technical knowledge of this programming environment. They're also interested in your communication skills. Being able to discuss a technical topic with somebody without a technical background demonstrates your ability to collaborate across the Doordash organization. This is important to any software development role.

      Written by William Swansen on November 13th, 2021

      1st Answer Example

      "Android is an open-source operating system based on Linux and developed by Andy Rubin. It is used primarily for devices such as cell phones and tablets. The Android operating system competes directly with Apple iOS in this market space. Applications developed by Android will run on a wide variety of platforms with little to no additional formatting."

      Written by William Swansen on November 13th, 2021

  • Operational

    3. How would you use an AndroidManifest.xml file?

      How to Answer

      You probably already recognize this is a technical question. This is because you are being asked about a specific technology used in this profession. Throughout the interview with Doordash, you will be asked many technical questions. Nobody can be familiar with all of the technology used in any profession. If you are asked about something you are not familiar with, state this and explain how you would locate the information to the interviewer.

      Written by William Swansen on November 13th, 2021

      1st Answer Example

      "The AndroidManifest.xml file holds the application if information Android needs before the program can be executed. Every Android application must contain this file which is stored in the root directory. Some of the functions the file performs include providing the file's name, describing the application's components, including the activities and services, and defining any classes the application will use."

      Written by William Swansen on November 13th, 2021

  • Technical

    4. When creating an Android app, do you prefer working with Serializable or Parcelable? Why?

      How to Answer

      When asking this question, the Doordash interviewer assumes that you are familiar with the terms Serializable and Parcelable. If you're not and were to ask the interviewer to define the terms, you might as well terminate the interview and leave. Being able to describe terminology, processes, and procedures is critical to succeeding during an interview for an Android developer's job with Doordash. This is why it is recommended that you take some time to review all the terms you use in this profession, even if you don't deal with them regularly. If you do come across a term you are not familiar with, answer the question by describing how you would locate the information to the interviewer.

      Written by William Swansen on November 13th, 2021

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  • Technical

    5. How is Dalvik used in Android development projects?

      How to Answer

      The term Dalvik is common within the Android programming environment. This was the original runtime developed for early versions of the Android OS. It has since been discontinued and replaced by the Android Runtime, or ART. Even though the Dalvik Virtual Machine and Runtime are no longer used, you still need to know about it and be able to answer questions asked by the interviewer at Doordash. You may want to use the past tense when discussing Dalvik to demonstrate that you understand it has been succeeded by ART.

      Written by William Swansen on November 13th, 2021

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  • Technical

    6. What are containers, and how are they used when programming in Android?

      How to Answer

      This question is an example of how a common term takes on special meaning within the context of the job you perform. Doordash Android Developers are expected to be familiar with all of the terminology, processes, and procedures used in this profession. You're likely to be asked about many of these during the interview. It is recommended that you brush up on the terms, processes, and procedures before the interview so you will be familiar with them. As with any question, if you don't recognize the term or know the answer, the best response is to describe how you would locate the information.

      Written by William Swansen on November 13th, 2021

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  • Technical

    7. How is Android activities different from services?

      How to Answer

      Every profession uses common terms which have a special meaning within the work that they do. The Doordash interviewer is asking you this question to confirm that you know the differences between activities and services within the context of Android. Since this is a technical question, you should first start by defining each of the terms and then list the differences between them. As with any technical question, keep your answer brief and to the point. You should also be prepared for follow-up questions in case the interviewer needs more information or wants to explore the topic in more detail.

      Written by William Swansen on November 13th, 2021

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  • Technical

    8. Can you demonstrate the syntax you use for Toast?

      How to Answer

      It is common that during an interview for any software development position, you will be presented cases and asked to create the code to resolve the case or solve an issue. This is especially true for Android application developers interviewing with Doordash. While you cannot be prepared to create every line of code the interviewer may ask you about, you should be able to address the more common ones. The Doordash interviewer seeks to confirm your ability to quickly develop code when presented with a common code case. If you cannot create the code they are asking you about, acknowledge this and then detail how you would do it using typical resources available to developers.

      Written by William Swansen on November 13th, 2021

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  • Technical

    9. What are some of the different launch modes in Android?

      How to Answer

      Launch mode in the Android applications is what generates and activates new instances within its ask that originate in the activity. There are several different launch modes Android application developers can employ. You should be familiar with these and be able to describe them to the interviewer at Doordash. When answering this type of technical question, you may want to provide examples to illustrate your answer.

      Written by William Swansen on November 13th, 2021

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  • Technical

    10. If an application you developed in Android for Doordash frequently crashes, what steps can you take to identify and fix the issue?

      How to Answer

      It is exceedingly rare that an application will crash once properly developed, tested, and implemented. However, certain circumstances will cause applications to crash. As a prospective Doordash Android developer, you should be aware of these and program your code to avoid them if an application crashes while in production, you should be able to provide advice to the Doordash support team or end users as to how to fix it. The interviewer will ask you this question to ensure that you are aware of this and have a portfolio of solutions to address application issues.

      Written by William Swansen on November 13th, 2021

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  • Technical

    11. What steps can you take to avoid 'application is not responding' errors when working in Android?

      How to Answer

      An ANR or 'application not responding' dialog box will appear whenever an application is not responding. There are several reasons that this may occur, and as an Android developer, you should be familiar with these and know how to avoid or correct them. This is an example of an operational question with which the Doordash interviewer seeks to understand how you go about doing this job. Operational, like technical questions, should be responded to directly and succinctly, with little embellishment. The interviewer will ask you a follow-up question if they need additional information.

      Written by William Swansen on November 13th, 2021

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  • Technical

    12. Can you explain the difference between implicit and explicit intent?

      How to Answer

      This question may seem similar to the one you were asked earlier in the Doordash interview. It is an example of a follow-up question that the interviewer uses to explore a topic in more detail. When interviewers ask follow-up questions, it indicates that you did not provide enough information with your initial answer, or they have a specific interest in this topic and want to delve into your expertise further. In either case, continue to keep your answers brief and to the point, and always anticipate additional follow-up questions.

      Written by William Swansen on November 13th, 2021

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  • Technical

    13. When working in Android, what is context?

      How to Answer

      Context is another term that has a special meaning within Android. If you have experience in the field you already know this and can easily respond to this question. However, it is still advised that you take time to review the terminology, processes, and procedures used by an Android developer before the interview with Doordash. This will help refresh your memory and put this information in the front of your mind, ready to be retrieved during the Doordash interview.

      Written by William Swansen on November 13th, 2021

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  • Technical

    14. In the context of Android, what is an intent, and can you provide some of the types of intents?

      How to Answer

      Intent is another fundamental component of the Android OS. As an android developer, you will know this and be able to respond to this question quickly and accurately. You should use your best judgment regarding how much information to provide when answering this question. Some interviewers at Doordash may prefer a brief, high-level response, while others expect you to go into great detail. As the interview progresses, you should be able to determine the type of responses the Doordash interviewer prefers and use this to frame your answers.

      Written by William Swansen on November 13th, 2021

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  • Technical

    15. What are some of the dialog boxes supported in Android?

      How to Answer

      Dialog boxes in Android are one way the users interact with the applications running on the platform. Android developers use these to provide access to the applications, input data required, or inform the user of the application's status. Dialog boxes have been standardized across Android to make them more intuitive and easier for the end-user to interact with. The Doordash interviewer asks this question to confirm your basic programming skills, so it is likely to be asked early in the interview.

      Written by William Swansen on November 13th, 2021

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  • Technical

    16. Please explain how sensors are used in Android.

      How to Answer

      Since Android operates on platforms that are typically mobile, it needs to deal with sensors used by the applications. This is somewhat unique among computer operating systems. As an Android developer, you need to be intimately familiar with the sensors used and code for them. This is what will distinguish you from other prospective Doordash software developers who have not worked on mobile platforms.

      Written by William Swansen on November 13th, 2021

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  • Technical

    17. Android Activities have life cycles. Can you describe what these are and the functions they perform?

      How to Answer

      During an Android developer job interview with Doordash, you may be presented with cases and asked to complete the task or resolve an issue. This question is similar to that. The interviewer is asking you a detailed question about a specific component of the Android OS. They could have also created a case where they would ask you to program code to accomplish a specific task within an application. These detailed questions are meant to confirm your programming skills and determine the scope of work you can perform for Doordash.

      Written by William Swansen on November 13th, 2021

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  • Technical

    18. Do you know which data types are supported by AIDL?

      How to Answer

      This is an interesting question in that the interviewer at Doordash is asking a specific question using an acronym that they assume you are familiar with. This is a more complex technical question and is likely to be asked later in the interview with Doordash as the interviewer gains confidence in your capabilities and strives to learn more about your background in greater detail. Complex technical questions should be answered in the same manner as the simpler ones, briefly, using simple, easy-to-understand language.

      Written by William Swansen on November 13th, 2021

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  • Technical

    19. Please describe the Google Android SDK and the tools it offers?

      How to Answer

      SDKs, or software development toolkits, are common for most programming languages and hardware platforms. These are created to make developing applications for the environment easier and to standardize the code used for the applications so they can easily interact with each other. As a prospective Doordash Android developer, you should be familiar with the Google Android SDK and the tools it offers.

      Written by William Swansen on November 13th, 2021

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  • Technical

    20. Can you define DDMS and discuss its use?

      How to Answer

      The Dalvik Virtual Machine, or DVM, is a Runtime Environment developed specifically for mobile devices. It was replaced with the Android Virtual Machine or AVM in Android version 5.0 (Lollipop). However, if you still need to be familiar with DVM and the tools associated with it. Organizations still use legacy versions of Android, and you will expect you to be capable of working with them. The Doordash interviewer expects you to define DDMS and discuss its features.

      Written by William Swansen on November 13th, 2021

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  • Technical

    21. What is an Android Debug Bridge or ADB, and how will you use it as a Doordash Android Developer?

      How to Answer

      The critical function of any software developer is to debug the code they have created. In any software programming role, there are a number of different tools used for this purpose. Most of these are specific to the languages used to create the software or the platforms on which the software operates. The Doordash interviewer is asking you about a tool specific to the Android environment. When asked about a specific tool, software, or process, the interviewer indicates that this is something their organization currently uses and you will be expected to use if hired.

      Written by William Swansen on November 13th, 2021

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  • Technical

    22. What does AAPT stand for, and how is it used in Android?

      How to Answer

      Working in any technical field involves the use of many acronyms. These are abbreviations of words or terms that increase the efficiency of communications between the development team and other Doordash project stakeholders. While it is impossible to be familiar with every single acronym used in your profession, you should be knowledgeable about the most common ones and be able to define them. You're likely to be asked about acronyms during the Doordash interview for this or any other technical job.

      Written by William Swansen on November 13th, 2021

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  • Technical

    23. What is JobScheduler in the context of Android?

      How to Answer

      The majority of questions you will be asked during an interview for an Android developer's job at Doordash will be technical. These ask you about different terminology, components, processes, and procedures used in creating Android applications. The other predominant questions will be operational. These focus on how you do the job and the steps you can take to complete a specific task. As with any interview, you also be asked general questions about your background, behavioral and situational questions to determine how well you will fit into Doordash's culture, and other questions which help the interviewer gain a complete picture of your capabilities, background, and personality.

      Written by William Swansen on November 13th, 2021

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  • Technical

    24. What is an activity as it relates to an Android application?

      How to Answer

      This is an example of a follow-up question. The Doordash interviewer will use a follow-up question to explore a topic in more detail. It can be asked immediately after a related question or sometime later in the interview. If asked later in the interview, the interviewer may be trying to calibrate your answers to make sure you are being consistent. This is why you need to answer all questions directly and honestly and not fabricate any answer that you may not know.

      Written by William Swansen on November 13th, 2021

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  • Technical

    25. What are the main components of an Android application?

      How to Answer

      Knowing the components of an Android application is critical in the role of an Android developer. Since you have experience in this area, you should be able to easily answer this question. The key to crafting your response is to keep it brief and to the point. You're likely to be asked this question early in the Doordash interview when the interviewer is focused on establishing your bona fides and confirming the information in your resume.

      Written by William Swansen on November 13th, 2021

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  • Technical

    26. What programming languages do developers use to create applications for the Android Operating System?

      How to Answer

      As with any operating system, developers can create code using a variety of different programming languages. Since the Android OS operates on mobile platforms with limited resources, programmers need to be very efficient in their code. When responding to this question, you should provide the interviewer at Doordash with a list of the programming languages you typically use and which align with those used by the Doordash development team. You can identify which languages they use by researching the organization. Sources for the information include Doordash's website, the job description, and speaking with current and former Doordash software development team members.

      Written by William Swansen on November 13th, 2021

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  • Technical

    27. What are the main files and folders you use when creating an Android app?

      How to Answer

      As the interview with Doordash progresses, the interviewer will continue to ask you technical questions about the Android operating environment. They seek to confirm your qualifications in this area and ensure that you have experience programming within the Android environment. They may also ask questions to determine if you can bring fresh new ideas to the Doordash development team. You should be open to providing suggestions on how to improve development and management within the Android OS. Employers like Doordash are constantly seeking employees who can improve their operations, processes, and procedures.

      Written by William Swansen on November 13th, 2021

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  • Technical

    28. What database do Android apps use, and why?

      How to Answer

      Like most operating systems, many of the applications are dependent on databases. Since Android runs primarily on mobile platforms with limited memory and storage, it uses a specific database design for this environment. Knowing this and being able to discuss it will demonstrate your qualifications for this role at Doordash and convince the interviewer that you're the candidate for this position.

      Written by William Swansen on November 13th, 2021

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  • Technical

    29. Please describe some of the main features of the Android architecture.

      How to Answer

      Being able to describe the main features of the Android architect will demonstrate your competency in this area and your knowledge of the OS. You can anticipate many questions similar to this one that the Doordash interviewer will use to probe your experience and knowledge. These are characterized as technical questions. When responding to a technical question, you should keep your answer brief and to the point. The Doordash interviewer will ask you a follow-up question if they need additional information or want to explore the topic in more detail.

      Written by William Swansen on November 13th, 2021

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  • Technical

    30. How does Android use bundles?

      How to Answer

      There are several different features, functions, and programming components unique to the Android operating system. Bundles are one of these. Doordash interviewers will ask you about the individual components you use in Android when programming for this platform. While you don't necessarily need direct experience programming on the platform to be qualified for this job, it will certainly boost your chances of being hired by Doordash if you can demonstrate your familiarity with and experience using Android.

      Written by William Swansen on November 13th, 2021

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