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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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Use Adaface tests trusted by recruitment teams globally. Adaface skill assessments measure on-the-job skills of candidates, providing employers with an accurate tool for screening potential hires.

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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?
 image

Hard

Holding References
Solve
What does the following Java code output?
 image

Medium

Abstract Interface
OOPs
Interfaces
Java Syntax
Object-oriented Programming (Oop) Concepts
Solve
Given following interface:
 image
Which of these are correct classes?
 image

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?
 image

Hard

Static Init Blocks
OOPs
Java Syntax
Code Execution Output
Solve
What does the following code output?
 image
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?
 image

Easy

Linear Layout
Android Ui Design
Solve
Check the following XML layout file. 
 image
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

Hard

Holding References

2 mins

Java
Solve

Medium

Abstract Interface
OOPs
Interfaces
Java Syntax
Object-oriented Programming (Oop) Concepts

2 mins

Java
Solve

Medium

Garbage Collection
Garbage Collection
Garbage_collection_rules
Object_reachability

2 mins

Java
Solve

Hard

Static Init Blocks
OOPs
Java Syntax
Code Execution Output

2 mins

Java
Solve

Easy

Intent & Activity
Data Passing
Intent Usage

2 mins

Android
Solve

Easy

Linear Layout
Android Ui Design

2 mins

Android
Solve

Easy

Registration Queue
Logic
Queues
Sorting By Custom Order

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic
String Parsing
Character Counting

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Custom Exception
Exception Handling
Custom Exceptions
Java
Easy2 mins
Solve
Holding References
Java
Hard2 mins
Solve
Abstract Interface
OOPs
Interfaces
Java Syntax
Object-oriented Programming (Oop) Concepts
Java
Medium2 mins
Solve
Garbage Collection
Garbage Collection
Garbage_collection_rules
Object_reachability
Java
Medium2 mins
Solve
Static Init Blocks
OOPs
Java Syntax
Code Execution Output
Java
Hard2 mins
Solve
Intent & Activity
Data Passing
Intent Usage
Android
Easy2 mins
Solve
Linear Layout
Android Ui Design
Android
Easy2 mins
Solve
Registration Queue
Logic
Queues
Sorting By Custom Order
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
String Parsing
Character Counting
Coding
Medium30 minsSolve
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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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Non-googleable Questions

Web Proctoring

IP Proctoring

Webcam Proctoring

MCQ Questions

Coding Questions

Typing Questions

Personality Questions

Custom Questions

Ready-to-use Tests

Custom Tests

Custom Branding

Bulk Invites

Public Links

ATS Integrations

Multiple Question Sets

Custom API integrations

Role-based Access

Priority Support

GDPR Compliance

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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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