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Junior Kotlin Developer

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Proficiency Level
Beginner-Expert
Experience
0-8 years
Duration
30 mins
WeCP Verified
WeCP
Subject Matter Expert
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Use Case

  • Assesses familiarity with Kotlin for product development roles.
  • Evaluates proficiency in Kotlin syntax, libraries, and functional programming.
  • Tests candidates' skills in MVVM architecture, Android, and Jetpack.
  • Identifies top Kotlin talent by gauging problem-solving and coding.

Skills Covered

Kotlin
IT-Programming Languages/Frameworks
MCQ
Verified
MCQs(Single Correct)
Medium
L2
+28 more

About

Junior Kotlin Developer

No test description provided
Target Audience
No targetAudience provided
Prerequisites
No prerequisites provided
Test Overview
Duration
30 mins
Questions
30
Passing Score
70%

Questions

Adding dependencies
Dependencies
Dependencies
IT-Programming Languages/Frameworks
Kotlin
L2
MCQ
What this question evaluates
This question evaluates the candidate's understanding of build systems and dependency management using the Gradle build tool. The candidate needs to be familiar with the source set DSL and different types of dependencies in Gradle. They should be able to determine the appropriate dependency type to use in a specific scenario.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Calling an infix to a function
IT-Programming Languages/Frameworks
IT-Programming Languages/Frameworks
Infix functions
Kotlin
L3
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's understanding of logical operators and expressions. It requires knowledge of boolean logic and the rules for evaluating expressions involving logical operators. The candidate must also be able to identify equivalent expressions and understand the order of operations in boolean logic.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Using the groupBy method
Grouping
Grouping
IT-Programming Languages/Frameworks
Kotlin
L3
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's familiarity with Kotlin's higher-order functions and the concepts of keySelector and valueTransform in the groupBy function. It requires understanding of functional programming, lambda expressions, and list manipulation.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Enumerated class RGB
Enumerations
Enumerations
IT-Programming Languages/Frameworks
Kotlin
L3
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's understanding of enums and generic functions in Kotlin. It requires knowledge of how to access the constants of an enum using the inline function and the enumValues() function. The candidate must be able to identify the valid code snippet that prints all the values of the RGB enum in a generic way.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Working with augmented operations
Augmented Assignments
Augmented Assignments
IT-Programming Languages/Frameworks
Kotlin
L2
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's familiarity with augmented assignments in Kotlin. It requires understanding of the concept of augmented assignments and their application in Kotlin. The candidate must be able to recognize and translate augmented assignments to the appropriate expressions in Kotlin.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Explicitly returning values from a lambda
IT-Programming Languages/Frameworks
IT-Programming Languages/Frameworks
Kotlin
L3
Lambda Expressions
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's understanding of lambda expressions and the return syntax used in Kotlin. It tests if the candidate can identify the correct code snippet that is equivalent to a given lambda expression.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Declaring an inline function
API inline functions
API inline functions
IT-Programming Languages/Frameworks
Kotlin
L2
MCQ
What this question evaluates
This question evaluates the candidate's understanding of inline functions in software development. It tests their knowledge of the risks associated with declaring an inline function as public and measures their ability to identify potential solutions to eliminate these risks.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Restrictions on inline class members
IT-Programming Languages/Frameworks
IT-Programming Languages/Frameworks
Inline functions
Kotlin
L1
MCQ
What this question evaluates
This question evaluates a candidate's understanding of Kotlin's inline functions and inline class members, specifically focusing on the restrictions applied to inline classes.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Kotlin star projections
IT-Programming Languages/Frameworks
IT-Programming Languages/Frameworks
Kotlin
L2
MCQ
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's understanding of Kotlin's star projections and how they can be used in declaring functions. It requires knowledge of how to declare a function using star projections and apply them correctly to match the given function declaration.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Building two-element windows from a collection
IT-Programming Languages/Frameworks
IT-Programming Languages/Frameworks
Kotlin
L3
MCQs(Single Correct)
Medium
What this question evaluates
This question evaluates the candidate's understanding of functional programming and list manipulation. It requires knowledge of creating pairs from adjacent elements of a collection and using the appropriate function for it. The candidate must recognize the correct code snippet that can be used to create pairs of adjacent elements from the given collection.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Working with constructors
Constructors
Constructors
IT-Programming Languages/Frameworks
Kotlin
L1
MCQ
What this question evaluates
This question evaluates the candidate's understanding of constructors in Kotlin. It tests their knowledge of the primary constructor, its placement in the class header, the omission of the 'constructor' keyword, and the requirement for initialization code.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Obtaining instances of a function
IT-Programming Languages/Frameworks
IT-Programming Languages/Frameworks
Instantiating function types
Kotlin
L2
MCQ
What this question evaluates
This question evaluates the candidate's understanding of Kotlin and their knowledge of obtaining an instance of a function type. It requires familiarity with function literals, callable references, and object-oriented programming concepts.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Performing filtering
Filtering
Filtering
IT-Programming Languages/Frameworks
Kotlin
L2
MCQs(Single Correct)
What this question evaluates
This question assesses the candidate's ability to analyze and predict the output of code snippets. It tests skills in understanding filter functions, list operations, and lambda expressions.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
A nullable function type
Function types
Function types
IT-Programming Languages/Frameworks
Kotlin
L2
MCQ
What this question evaluates
This question evaluates the candidate's understanding of function types and nullability in Kotlin. It requires knowledge of the different notations used to specify whether a function type is nullable or not.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Retrieving elements from a collection list
IT-Programming Languages/Frameworks
IT-Programming Languages/Frameworks
Kotlin
L2
MCQs(Single Correct)
Medium
What this question evaluates
This question evaluates the candidate's familiarity with Kotlin's collection functions, specifically the take functions. It requires understanding the takeWhile and takeLastWhile functions, and how they are used to filter elements based on a predicate. The candidate must also recognize the difference between takeWhile and takeLastWhile, and understand the behavior of these functions when applied to a list of strings.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Creating multiple variables at once
Declarations
Declarations
Easy
IT-Programming Languages/Frameworks
Kotlin
L2
What this question evaluates
This question evaluates the candidate's understanding of a specific concept related to variable declaration in the given context. It requires knowledge of a particular feature that allows the creation of multiple variables at once through a function. The candidate must be familiar with the concept of destructuring declaration.
Type:
Programming
Difficulty:
Easy
Time:
0.75 mins
Attempts:
100+
Success Rate:
70.01%
Contents of a class
Class layout
Class layout
Easy
IT-Programming Languages/Frameworks
Kotlin
L2
What this question evaluates
This question tests the candidate's understanding of the order in which different contents of a class are sorted as per the general convention.
Type:
Programming
Difficulty:
Easy
Time:
0.75 mins
Attempts:
100+
Success Rate:
70.01%
Boxed booleans
Easy
Easy
IT-Programming Languages/Frameworks
Kotlin
Kotlin Booleans
L1
What this question evaluates
This question evaluates the candidate's understanding of Kotlin 1.3 and the concept of boxing Booleans. It tests the candidate's ability to identify the conditions that can lead to Booleans being boxed.
Type:
Programming
Difficulty:
Easy
Time:
0.75 mins
Attempts:
100+
Success Rate:
70.01%
Using library functions
Easy
Easy
IT-Programming Languages/Frameworks
Kotlin
L2
Library Functions
What this question evaluates
This question evaluates the candidate's familiarity with library functions used for iterating over an array and accessing its elements. It requires knowledge of alternative functions that can replace a given code snippet. The candidate must recognize the different library functions and their purpose.
Type:
Programming
Difficulty:
Easy
Time:
0.75 mins
Attempts:
100+
Success Rate:
70.01%
The superclass Any
Easy
Easy
IT-Programming Languages/Frameworks
Inheritance
Kotlin
L1
What this question evaluates
This question evaluates the candidate's understanding of the Kotlin programming language and its superclass hierarchy. It tests the candidate's knowledge of the methods contained in the Any superclass in Kotlin.
Type:
Programming
Difficulty:
Easy
Time:
0.75 mins
Attempts:
100+
Success Rate:
70.01%
MVVM architecture pattern
Android Development
Android Development
IT-Mobile App Development
L2
MCQs(Single Correct)
MVVM architecture design
What this question evaluates
This question evaluates the candidate's understanding of the relationship between View and ViewModel in the context of the MVVM architecture pattern used in Android application development.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Store and expose a location
Android Development
Android Development
IT-Mobile App Development
L3
MCQs(Single Correct)
MVVM architecture design
What this question evaluates
This question evaluates the candidate's understanding of access modifiers in object-oriented programming, specifically in the context of Android development. It requires knowledge of how to restrict access to a class and its members to prevent misuse by other developers.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Expose the data
Android Development
Android Development
IT-Mobile App Development
L2
MCQs(Single Correct)
MVVM architecture design
What this question evaluates
This question evaluates the candidate's understanding of the MVVM architecture design pattern in Android development. It tests their knowledge of how to expose data from the Model layer to the ViewModel while maintaining decoupling. The candidate should be familiar with concepts such as observables and UI elements.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Record and track style choices
Android Development
Android Development
Google’s Android design principles
IT-Mobile App Development
L2
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's understanding of design patterns and best practices in Android development. It specifically tests the ability to define a repository for recording and tracking style choices and changes in an Android application.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Let's include regions
Android Development
Android Development
Google’s Android design principles
IT-Mobile App Development
L2
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's knowledge of different drop zone patterns used for implementing file upload functionality on a web application. The candidate must be familiar with various drop zone patterns and understand their purpose and benefits.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Let's create a dialog
Android Development
Android Development
Google’s Android design principles
IT-Mobile App Development
L2
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's understanding of material design principles for creating an effective dialog in an Android application. It tests their knowledge of principles such as focusing user attention, direct communication of information, and contextual appearance of the dialog.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Passing data down through Composition
Jetpack
Jetpack
Jetpack Compose
L1
MCQs(Single Correct)
Medium
What this question evaluates
This question gauges the candidate's understanding of tools that facilitate data transfer in Jetpack Compose, a key UI toolkit in mobile app development.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Safely calling suspend functions
Composable
Composable
Jetpack
Jetpack Compose
L1
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's understanding of suspending functions and their usage within composables. It requires knowledge of different types of composables and their purpose in managing asynchronous operations. The candidate should be able to identify the appropriate composable for calling suspend functions safely.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Changing the scroll position of an element
Gestures
Gestures
Jetpack
Jetpack Compose
L2
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's proficiency in working with scroll manipulation in web development. It tests their understanding of different scroll modifiers and their default parameters.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
Understanding delegated properties in Compose
Delegated properties
Delegated properties
Jetpack
Jetpack Compose
L3
MCQs(Single Correct)
What this question evaluates
This question evaluates the candidate's understanding of delegated properties in Kotlin's Compose framework. It requires knowledge of how to correctly use the `by` keyword to delegate property access to another function or object. The candidate must identify the snippet that demonstrates the valid use of a delegated property in Compose.
Type:
Programming
Difficulty:
Medium
Time:
1 mins
Attempts:
100+
Success Rate:
70.01%
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Passed
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AI Summary
Skills Performance
Score
Kotlin
87%
IT-Programming Languages/Frameworks
80%
MCQ
85%
Verified
82%
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Review
Verified
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IT-Programming Languages/Frameworks
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