Java & Android Online Test

The Java Android online test uses multiple-choice questions to evaluate candidates on their knowledge and skills related to Java and Android fundamentals, user interface design, activity and fragment lifecycle, data storage and retrieval, network communication, threading and concurrency, and integration with third-party libraries and APIs.

Covered skills:

Java Basics
Java OOPs
Java Collections
Android Core Framework
Android Components
Android User Interaction Handling
Java Coding

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About the Java & Android Test

The Java & Android Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

Able to write Java code using basic syntax and data types
Proficient in object-oriented programming concepts in Java
Knowledgeable in Java Collections framework and data structures
Familiar with the core framework of Android development
Able to design and implement Android components
Skilled in handling Android user interactions
Capable of efficiently handling exceptions and errors in Java
Experienced in utilizing Java coding principles and best practices

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Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

These are just a small sample from our library of 15,000+ questions. The actual questions on this Java & Android Test will be non-googleable.

🧐 Question
Easy Custom Exception Exception Handling Custom Exceptions	Solve
What does the following code output?
Hard Holding References	Solve
What does the following Java code output?
Medium Abstract Interface OOPs Interfaces Java Syntax Object-oriented Programming (Oop) Concepts	Solve
Given following interface: Which of these are correct classes?
Medium Garbage Collection Garbage Collection Garbage_collection_rules Object_reachability	Solve
After which line is "bs" object, created on Line 4, eligible for garbage collection?
Hard Static Init Blocks OOPs Java Syntax Code Execution Output	Solve
What does the following code output? 1) G A B E D H 2) G B A D E H 3) G B A D E H C F 4) C F G A B E D H 5) C F G B A D E H 6) G C F A B E D H 7) G C F B A D E H
Easy Intent & Activity Data Passing Intent Usage	Solve
We want to pass a value to next activity in Android. Which of the following options are the right way to do it?
Easy Linear Layout Android Ui Design	Solve
Check the following XML layout file. What will the UI for this layout file look like? 1. An edit text to the right of a text view and a button beneath them 2. An edit text to the right of a text view and a button to the right of the text view 3. A text view, an edit text beneath it and the button beneath the edit text 4. An edit text to the left of a text view and a button beneath it
Easy Registration Queue Logic Queues Sorting By Custom Order	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
Medium Visitors Count Strings Logic String Parsing Character Counting	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

	🧐 Question	🔧 Skill
	Easy Custom Exception Exception Handling Custom Exceptions	2 mins Java	Solve
What does the following code output?
	Hard Holding References	2 mins Java	Solve
What does the following Java code output?
	Medium Abstract Interface OOPs Interfaces Java Syntax Object-oriented Programming (Oop) Concepts	2 mins Java	Solve
Given following interface: Which of these are correct classes?
	Medium Garbage Collection Garbage Collection Garbage_collection_rules Object_reachability	2 mins Java	Solve
After which line is "bs" object, created on Line 4, eligible for garbage collection?
	Hard Static Init Blocks OOPs Java Syntax Code Execution Output	2 mins Java	Solve
What does the following code output? 1) G A B E D H 2) G B A D E H 3) G B A D E H C F 4) C F G A B E D H 5) C F G B A D E H 6) G C F A B E D H 7) G C F B A D E H
	Easy Intent & Activity Data Passing Intent Usage	2 mins Android	Solve
We want to pass a value to next activity in Android. Which of the following options are the right way to do it?
	Easy Linear Layout Android Ui Design	2 mins Android	Solve
Check the following XML layout file. What will the UI for this layout file look like? 1. An edit text to the right of a text view and a button beneath them 2. An edit text to the right of a text view and a button to the right of the text view 3. A text view, an edit text beneath it and the button beneath the edit text 4. An edit text to the left of a text view and a button beneath it
	Easy Registration Queue Logic Queues Sorting By Custom Order	30 mins Coding	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
	Medium Visitors Count Strings Logic String Parsing Character Counting	30 mins Coding	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Custom Exception Exception Handling Custom Exceptions	Java	Easy	2 mins	Solve
What does the following code output?
	Holding References	Java	Hard	2 mins	Solve
What does the following Java code output?
	Abstract Interface OOPs Interfaces Java Syntax Object-oriented Programming (Oop) Concepts	Java	Medium	2 mins	Solve
Given following interface: Which of these are correct classes?
	Garbage Collection Garbage Collection Garbage_collection_rules Object_reachability	Java	Medium	2 mins	Solve
After which line is "bs" object, created on Line 4, eligible for garbage collection?
	Static Init Blocks OOPs Java Syntax Code Execution Output	Java	Hard	2 mins	Solve
What does the following code output? 1) G A B E D H 2) G B A D E H 3) G B A D E H C F 4) C F G A B E D H 5) C F G B A D E H 6) G C F A B E D H 7) G C F B A D E H
	Intent & Activity Data Passing Intent Usage	Android	Easy	2 mins	Solve
We want to pass a value to next activity in Android. Which of the following options are the right way to do it?
	Linear Layout Android Ui Design	Android	Easy	2 mins	Solve
Check the following XML layout file. What will the UI for this layout file look like? 1. An edit text to the right of a text view and a button beneath them 2. An edit text to the right of a text view and a button to the right of the text view 3. A text view, an edit text beneath it and the button beneath the edit text 4. An edit text to the left of a text view and a button beneath it
	Registration Queue Logic Queues Sorting By Custom Order	Coding	Easy	30 mins	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
	Visitors Count Strings Logic String Parsing Character Counting	Coding	Medium	30 mins	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

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Why you should use Pre-employment Java & Android Online Test?

The Java & Android Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

Java Basics
Java OOPs
Java Collections
Android Core Framework
Android Components
Android User Interaction Handling
Java Coding
Handling exceptions and errors in Java
Understanding inheritance and polymorphism in Java
Working with data structures and algorithms in Java

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the Java & Android Online Test?

Java Basics: Java Basics refers to the fundamental concepts and syntax of the Java programming language. It includes knowledge of data types, variables, control structures, and basic input/output operations. This skill should be measured in the test to ensure candidates have a strong foundation in Java programming, as it forms the basis for more advanced topics.

Java OOPs: Java OOPs (Object-Oriented Programming) involves understanding the principles of encapsulation, inheritance, polymorphism, and abstraction in Java. This skill allows developers to write modular, maintainable, and reusable code. It is important to assess this skill in the test to evaluate a candidate's ability to implement efficient and scalable Java solutions.

Java Collections: Java Collections is a framework that provides implementations of commonly used data structures such as lists, sets, and maps. It is essential for developers to be proficient in this skill to manipulate and store data effectively. Evaluating this skill in the test allows recruiters to gauge a candidate's proficiency in using these data structures for solving real-world problems.

Android Core Framework: The Android Core Framework is a collection of essential classes and libraries that facilitate the development of Android applications. It includes components like Activity, Service, ContentProvider, and Intent. Measuring this skill in the test helps recruiters assess a candidate's understanding of the core building blocks of Android applications.

Android Components: Android Components are the building blocks of an Android application, such as activities, fragments, and views. This skill is important to assess in the test as it demonstrates a candidate's ability to design and structure the user interface and functionality of an Android app.

Android User Interaction Handling: Android User Interaction Handling involves capturing and responding to user actions within an Android application, such as button clicks, gestures, and touch events. It is crucial to assess this skill in the test to ensure candidates can create intuitive and responsive user experiences in their Android apps.

Java Coding: Java Coding is the ability to write clean, efficient, and readable code using the Java programming language. This skill encompasses writing algorithms, implementing data structures, and applying best practices in Java development. Evaluating this skill in the test allows recruiters to gauge a candidate's coding skills and their ability to solve programming challenges effectively.

Full list of covered topics

The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for Java & Android Test to be based on.

Variables

Operators

Conditional statements

Loops

Methods

Inheritance

Polymorphism

Abstraction

Encapsulation

ArrayList

HashMap

LinkedList

Stack

Queue

Thread

AsyncTask

Activity

Fragment

Service

Broadcast receiver

Intent

Layouts

Views

Event handling

UI widgets

Exception handling

File I/O

Networking

SQLite database

Shared preferences

RecyclerView

Adapter

ViewHolder

Firebase

JSON parsing

Permissions

Dialogs

Toast

Testing

Debugging

Logging

Lambda expressions

Generics

Multithreading

Design patterns

Synchronization

Serialization

Lambda expressions

Exception handling

Recursion

Sorting

Searching

Data structures

Algorithm analysis

Memory management

Coding best practices

Code refactoring

What roles can I use the Java & Android Online Test for?

Java Developer
Android Developer
Senior Android Developer
Mobile App Developer

How is the Java & Android Online Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

Implementing MVC architecture in Android
Utilizing Intents and Intent Filters in Android
Designing and implementing custom views in Android
Using Android XML layouts and resources effectively
Handling user input and touch events in Android
Implementing multithreading and background tasks in Java
Working with databases and SQLite in Android
Creating and managing Fragments in Android
Testing and debugging Android applications
Building responsive and efficient user interfaces in Android
Optimizing code and performance in Java and Android

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

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Have questions about the Java & Android Hiring Test?

What is Java & Android Test?

The Java & Android Test assesses a candidate's proficiency in Java and Android development. It is used by recruiters to evaluate technical skills needed for roles involving Android application development and Java programming.

Can I combine Java & Android Test with JavaScript questions?

Yes, you can request a custom test that includes both Java & Android questions and JavaScript questions. For more details on assessing JavaScript skills, check out the JavaScript Online Test.

What topics are covered in the Java & Android Test?

The test evaluates a range of skills including Java Basics, Java OOPs, Java Collections, Android Core Framework, Android Components, Android User Interaction Handling, and Java Coding.

How to use Java & Android Test in my hiring process?

Integrate the test in the pre-screening phase of your recruitment. Share the assessment link in your job posting or send invitations directly to candidates via email.

Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

Non-googleable questions
IP proctoring
Screen proctoring
Web proctoring
Webcam proctoring
Plagiarism detection
Secure browser
Copy paste protection

Read more about the proctoring features.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

What is the cost of using this test?

You can check out our pricing plans.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

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Along with scorecards that report the performance of the candidate in detail, you also receive a comparative analysis against the company average and industry standards.

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