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C# (Coding): Data Structures & Objects Test

The C# (Coding): Data Structures & Objects Test evaluates a candidate's ability to work with data structures and object-oriented programming concepts in C#. It includes scenario-based MCQs and coding questions to assess knowledge of classes objects inheritance polymorphism abstract classes interfaces and common data structures like lists dictionaries stacks queues trees and graphs.

Covered skills:

  • Classes and Objects
  • Inheritance
  • Polymorphism
  • Abstract Classes
  • Interfaces
  • Collections
  • Lists
  • Dictionaries
  • Stacks
  • Queues
  • Trees
  • Graphs
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About the C# (Coding): Data Structures & Objects Assessment Test


The C# (Coding): Data Structures & Objects 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:

  • Demonstrate proficiency in creating and manipulating classes and objects in Ruby
  • Implement inheritance to create hierarchical relationships between classes
  • Apply polymorphism concepts to write flexible and reusable code
  • Utilize abstract classes to define common interfaces and behaviors
  • Implement interfaces to achieve multiple inheritance and define contracts
  • Effectively use collections to store and manipulate groups of objects
  • Manage and manipulate data using lists and arrays in Ruby
  • Utilize dictionaries (hashes) for key-value pair data storage and retrieval
  • Implement stack data structures for last-in-first-out operations
  • Use queue data structures for first-in-first-out operations
  • Understand and implement tree data structures for hierarchical data representation
  • Work with graph data structures to model complex relationships between objects

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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 C# (Coding): Data Structures & Objects Test will be non-googleable.

🧐 Question

Easy

Arrays Strings
Arrays
Strings
Solve
Check the  following Ruby code:
 image
We want the following execution result:
- Commit
- PR
- Merge
What should we replace __BLOCK__  with to achieve this?

Medium

Class and Self
OOPs
Solve
What is the execution result of the following Ruby code?
 image
 image

Easy

Exceptions
Exceptions
OOPs
Syntax
Exception Handling
Solve
What is the result of following Ruby code:
 image

Medium

New Class
OOPs
Singleton
Solve
Check the  following Ruby code:
 image
Which all of the following statements should replace __BLOCK__ to have "Marvel" as execution result?
A: Sample.new.class.ciao
B: Sample.class.new.ciao
C: Sample.new.ciao
D: Sample.ciao
🧐 Question🔧 Skill

Easy

Arrays Strings
Arrays
Strings

2 mins

Ruby
Solve

Medium

Class and Self
OOPs

2 mins

Ruby
Solve

Easy

Exceptions
Exceptions
OOPs
Syntax
Exception Handling

2 mins

Ruby
Solve

Medium

New Class
OOPs
Singleton

2 mins

Ruby
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Arrays Strings
Arrays
Strings
Ruby
Easy2 mins
Solve
Class and Self
OOPs
Ruby
Medium2 mins
Solve
Exceptions
Exceptions
OOPs
Syntax
Exception Handling
Ruby
Easy2 mins
Solve
New Class
OOPs
Singleton
Ruby
Medium2 mins
Solve
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Why you should use Pre-employment C# (Coding): Data Structures & Objects Test?

The C# (Coding): Data Structures & Objects 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:

  • Creating and using classes in C#.
  • Implementing inheritance in C# classes.
  • Understanding and applying polymorphism.
  • Creating abstract classes and methods.
  • Implementing interfaces and interface methods.
  • Using collections to store data.
  • Working with generic lists in C#.
  • Managing key-value pairs using dictionaries.
  • Manipulating data with stacks.
  • Utilizing queues for task management.

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 C# (Coding): Data Structures & Objects Test?

Classes and Objects: Classes are blueprints for creating objects, encapsulating data and behavior. Objects are instances of classes, representing real-world entities in code. This fundamental concept forms the basis of object-oriented programming, enabling code organization and reusability.

Inheritance: Inheritance allows a class to inherit properties and methods from another class. It promotes code reuse and establishes a hierarchical relationship between classes. This skill is crucial for creating efficient and maintainable code structures.

Polymorphism: Polymorphism enables objects of different types to be treated as objects of a common base type. It allows for flexible and extensible code design. This concept is essential for writing scalable and modular applications.

Abstract Classes: Abstract classes serve as base classes that cannot be instantiated. They provide a common interface for derived classes while allowing some methods to have implementations. Abstract classes are vital for designing robust class hierarchies and enforcing common behavior across related classes.

Interfaces: Interfaces define a contract of methods that implementing classes must adhere to. They enable multiple inheritance of behavior and promote loose coupling between components. Interfaces are key to achieving flexibility and interchangeability in software design.

Collections: Collections are data structures that store and organize groups of objects. They provide methods for adding, removing, and accessing elements efficiently. Understanding collections is crucial for managing and manipulating data in C# applications.

Lists: Lists are dynamic arrays that can grow or shrink in size. They offer efficient random access and simple operations for adding or removing elements. Lists are widely used for storing and manipulating sequences of data in C#.

Dictionaries: Dictionaries store key-value pairs, allowing fast lookup of values based on unique keys. They provide efficient data retrieval and are essential for implementing associative arrays. Dictionaries are invaluable for solving various programming problems that involve mapping and lookup operations.

Stacks: Stacks follow the Last-In-First-Out (LIFO) principle for storing and retrieving elements. They are useful for managing function calls, parsing expressions, and implementing undo mechanisms. Understanding stacks is important for solving problems that involve backtracking or depth-first traversal.

Queues: Queues implement the First-In-First-Out (FIFO) principle for element storage and retrieval. They are commonly used in scheduling, breadth-first searches, and managing asynchronous operations. Proficiency with queues is essential for implementing efficient algorithms and managing ordered data processing.

Trees: Trees are hierarchical data structures consisting of nodes connected by edges. They are used to represent hierarchical relationships and optimize search operations. Understanding tree structures is crucial for implementing efficient algorithms and solving complex problems in computer science.

Graphs: Graphs consist of vertices connected by edges, representing relationships between entities. They are used to model networks, dependencies, and complex systems. Proficiency in graph algorithms is essential for solving problems in areas such as social networks, route planning, and optimization.

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 C# (Coding): Data Structures & Objects Test to be based on.

Class definition
Object instantiation
Instance variables
Class methods
Instance methods
Encapsulation
Inheritance
Superclass
Subclass
Method overriding
Polymorphism
Duck typing
Abstract classes
Interfaces
Modules
Mixins
Arrays
Hashes
Enumerable
Iterators
Linked lists
Doubly linked lists
Stack implementation
Queue implementation
Deque
Priority queue
Binary trees
Binary search trees
AVL trees
Heap
Graph representation
Graph traversal
Depth-first search
Breadth-first search
Dijkstra's algorithm
Ruby blocks
Procs
Lambdas
Exception handling
Custom exceptions
File I/O
Serialization
Metaprogramming
Reflection
Unit testing
RSpec
Gem management
Bundler
Ruby on Rails
ActiveRecord

What roles can I use the C# (Coding): Data Structures & Objects Test for?

  • Software Developer
  • Backend Developer
  • Application Developer
  • Systems Engineer
  • Full Stack Developer
  • Web Developer
  • Game Developer
  • Mobile App Developer
  • DevOps Engineer
  • Data Engineer

How is the C# (Coding): Data Structures & Objects 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 binary trees for hierarchies.
  • Representing data relationships with graphs.
  • Designing custom object-oriented structures.
  • Managing lifecycle of objects in C#.
  • Applying SOLID principles in C# code.
  • Handling complex data structures efficiently.
  • Optimizing code for performance.
  • Refactoring existing codebases.
  • Designing scalable object-oriented systems.
  • Implementing advanced tree and graph algorithms.

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 C# (Coding): Data Structures & Objects Hiring Test?

What is C# (Coding): Data Structures & Objects Test?

The C# (Coding): Data Structures & Objects Test assesses a candidate's skills in various data structures, classes, and object-oriented principles in C#. Recruiters use it to evaluate coding and problem-solving capabilities in C# for hiring developers.

Can I combine the C# (Coding): Data Structures & Objects Test with SQL questions?

Yes, recruiters can request a custom test that includes both C# coding and SQL questions. For details on how we assess SQL skills, check our C# & SQL Test.

What kind of questions are used to evaluate senior candidates in the C# (Coding): Data Structures & Objects Test?

The test includes topics like implementing binary trees, designing custom object-oriented structures, optimizing code for performance, and applying SOLID principles in C#.

How to use the C# (Coding): Data Structures & Objects Test in my hiring process?

Use this test as a pre-screening tool at the start of your hiring process. You can add a link to the assessment in your job post or invite candidates by email.

Can I test C# and .NET together in a test?

Yes, you can. We recommend our C# & .NET Test, which combines both skills for a comprehensive evaluation.

What are the main C# tests?
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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