Dart Language Interview Questions

Checkout Vskills Interview questions with answers in Dart language to prepare for your next job role. The questions are submitted by professionals to help you to prepare for the Interview.    

Q.1 What does the appBar widget in Flutter contains

The appBar widget in Flutter contains elevation, title and brightness

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Q.2 Which OS does Dart language supports

Dart language supports Linux, macOS and Windows operating system

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Q.3 How can you initialize final instance variables in Dart language

Final instance variables in Dart language can be initialized at the variable declaration, by a constructor parameter and in the constructor’s initializer list

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Q.4 What does the const keyword in Dart language is used for

The const keyword in Dart language is used to declare constant variables, create constant values and declare constructors that create constant values

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Q.5 Which methods can be abstract in Dart language

The methods which can be abstract in Dart language are Instance, getter and setter

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Q.6 What qualifies the usage of deferred loading in Dart language

The deferred loading in Dart language is to reduce a web app’s initial startup time, to perform A/B testing—trying out alternative implementations of an algorithm and to load rarely used functionality, such as optional screens and dialogs.

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Q.7 What is valid for deferred loading in Dart language

The applicable details for deferred loading in Dart language is- a deferred library’s constants aren’t constants in the importing file, you can’t use types from a deferred library in the importing file and Dart language implicitly inserts loadLibrary() into the namespace that you define using deferred as namespace.

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Q.8 Which operator is valid for the int class in Dart language

The operator valid for the int class in Dart language are the * operator, >> operator and ceil().

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Q.9 What is a valid method on Stream which process the stream and return a result

The methods on Stream which process the stream and return a result are isEmpty, contains and elementAt.

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Q.10 What is valid for Dart language's static methods

The Dart language's static methods are the member class instead of its object, static methods are also identifies as class methods and we can access static methods using the class name.

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Q.11

What will be printed by the following statements:

var cities = ['los angeles', 'san francisco', 'new york'];

print(cities.firstWhere((c) => c.length < 10));

Only new york will be printed

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Q.12 The Scaffold widget in Flutter, is able to occupy

The Scaffold widget in Flutter, is able to occupy the whole device screen.

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Q.13 What is a horizontal bar that is mainly displayed at the top of the Scaffold widget in Flutter

The horizontal bar shown at the top of the Scaffold widget in Flutter is the appBar.

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Q.14 What displays the main content in the Scaffold widget in Flutter?

body shows the main content in the Scaffold widget in Flutter

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Q.15 What is a slider panel that is displayed at the side in Flutter?

The slider panel shown at the side in Flutter is the drawer

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Q.16 Which Dart language tool compiles Dart language code to native x64 machine code, producing either a standalone executable or a snapshot in Dart language SDK

Dart language2native compiles Dart language code to native x64 machine code

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Q.17 What is the name of Dart language-to-JavaScript compiler (used only for web development) in Dart language SDK

Dart language2js is the Dart language-to-JavaScript compiler

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Q.18 In Dart language, uninitialized variables have an initial value of?

The initial value of uninitialized variables is null

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Q.19 What is the type assigned to instance variables in Dart language

The instance variables in Dart language are final.

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Q.20 When should final instance variables in Dart language be initialized?

The final instance variables in Dart language are initialized before the constructor body starts

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Q.21 What type of constant does a const variable in Dart language is?

A const variable in Dart language is compile-time constant

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Q.22 What is the size in bits of integer values in Dart language?

The size in bits of integer values in Dart language is 64 bits

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Q.23 Why you are suitable as Dart programmer?

As a Dart programmer, I am having extensive experience in developing both web and mobile application with requisite skills including: communication, problem solving and coping under pressure which is of importance for Dart programmer role.

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Q.24 Do you feel satisfied with your role as Dart programmer?

I feel satisfied as Dart programmer as I am able to better use my programming and logic skills for developing reliable Dart programs quickly which helps company to manage their processes more efficiently.

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Q.25 How you keep yourself updated of new trends in Dart language?

Dart language has been developed by Google and has a defined release cycle. I update myself by attending Dart language related seminars, tutorials and certifications as available online or offline.

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Q.26 What are your strengths as a Dart programmer?

As a Dart programmer I am having extensive experience on developing both mobile applications for Android and iPhone as well as developing cross browser web applications. I also have the requisite managerial skills for managing Dart development related projects.

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Q.27 How do you prioritize Dart programming related tasks?

Dart programming involves many tasks on a day to day basis. Tasks also need to be prioritized to accomplish the organizational goals as per the specified KPIs (key performance indicators). Prioritization of tasks is done on the basis of various factors like: the tasks relevance, urgency, cost involved and resource availability.

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Q.28 How you manage your time for Dart programming projects?

Dart language development projects involve lots of tasks which need to be completed in a specific time frame. Hence time management is of utmost importance and is applied by: using to do lists, being aware of time wasters and optimizing work environment as well as applying agile project management.

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Q.29 Why do you want to work as Dart programmer at this company?

Working as Dart programmer at this company offers me more many avenues of growth and will enhance my Dart programming skills. Your company has been in the domain of software development for long and serves clients in many countries and hence offers opportunities for future growth in Dart programmer role. Also considering my education, skills and experience I see myself, more apt for the post.

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Q.30 Why do you want the Dart programmer job?

I want the Dart programmer job as I am passionate about making reliable and quality programs which serve the end user in making their processes more efficient and effective.

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