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About the test:

The C# test has scenario-based MCQ questions to evaluate C# basics (variables, functions, types etc.), C# OOP concepts (classes and design patterns), efficient C# usage (exceptions handling, garbage collection etc.) and the ability to scale C# programs using Asynchronous programming. The test uses simple coding questions to evaluate hands-on C# programming knowledge.

Covered skills:

  • C# Basics
  • Inheritance and polymorphism
  • Garbage Collector and Memory footprint
  • C# Multithreading
  • OOP concepts (Objects; Classes; Methods)
  • Dealing with Errors/ Exceptions and Nulls
  • Structural and Creational Design Patterns
  • C# Networking

9 reasons why
9 reasons why

Adaface C# Test is the most accurate way to shortlist C# Developers



Reason #1

Tests for on-the-job skills

The C# 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:

  • Ability to write clean and maintainable C# code
  • Understanding of object-oriented programming concepts in C#
  • Proficiency in handling exceptions and errors effectively
  • Knowledge of inheritance and polymorphism in C#
  • Understanding the role of garbage collector in managing memory
  • Familiarity with structural and creational design patterns in C#
  • Ability to implement multithreading in C# applications
  • Knowledge of networking concepts in C#
  • Understanding of C# Basics
  • Proficiency in dealing with null values in C#
Reason #2

No trick questions

no trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface
Reason #3

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 10,000+ questions. The actual questions on this C# Online Test will be non-googleable.

🧐 Question

Hard

Classes and Constructors
OOPs
Solve
What is the output of the following C# code?
 image

Easy

Arrays and Exceptions
Arrays
Exceptions
Solve
What is the output of the following C# code?
 image

Medium

Multiple Namespaces
Solve
Class Student exists in both firstnamespace and secondnamespace namespaces. Which of the following are the correct ways to use the Student class?
 image

Medium

Static and constructors
OOPs
Solve
What is the output of the following C# code?
 image

Easy

Registration Queue
Logic
Queues
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
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

Hard

Classes and Constructors
OOPs

2 mins

C#
Solve

Easy

Arrays and Exceptions
Arrays
Exceptions

2 mins

C#
Solve

Medium

Multiple Namespaces

2 mins

C#
Solve

Medium

Static and constructors
OOPs

3 mins

C#
Solve

Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Classes and Constructors
OOPs
C#
Hard2 mins
Solve
Arrays and Exceptions
Arrays
Exceptions
C#
Easy2 mins
Solve
Multiple Namespaces
C#
Medium2 mins
Solve
Static and constructors
OOPs
C#
Medium3 mins
Solve
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!


Brandon Lee, Head of People, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment C# Online Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests
Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the C# Online Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

invite candidates
Reason #7

Detailed scorecards & benchmarks

View sample scorecard
Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

test completion rate
Reason #9

Advanced Proctoring


Learn more

About the C# Assessment Test

Why you should use Pre-employment C# Online Test?

The C# Online 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:

  • C# Basics
  • Understanding of OOP concepts (Objects, Classes, Methods)
  • Proficiency in Inheritance and Polymorphism
  • Dealing with Errors and Exceptions
  • Handling Nulls and Null Reference Exceptions
  • Understanding Garbage Collector and Memory Footprint
  • Knowledge of Structural and Creational Design Patterns
  • Experience with C# Multithreading
  • Understanding of C# Networking
  • Proficiency in C# Generics

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# Online Test?

  • C# Basics

    C# Basics refers to the fundamental concepts and syntax of the C# programming language. It includes topics such as data types, variables, control structures, and basic input/output operations. This skill is measured in the test to assess the candidate's foundational understanding of C# development.

  • OOP concepts (Objects; Classes; Methods)

    OOP concepts in C# involve understanding the principles of object-oriented programming, including objects, classes, and methods. This skill is important to measure as it demonstrates the candidate's ability to design and implement modular and reusable code using object-oriented principles.

  • Inheritance and polymorphism

    Inheritance and polymorphism are crucial concepts in OOP. In C#, inheritance allows classes to inherit properties and methods from parent classes, while polymorphism enables objects to take multiple forms. Evaluating this skill helps determine the candidate's proficiency in leveraging inheritance and polymorphism to create more flexible and scalable code.

  • Dealing with Errors/ Exceptions and Nulls

    Handling errors, exceptions, and null values is essential in any robust software development process. This skill measures the candidate's ability to identify and handle potential runtime errors, exceptions, and null references in C# code, ensuring the application's stability and reliability.

  • Garbage Collector and Memory footprint

    The Garbage Collector in C# automatically manages memory allocation and deallocation. It is responsible for reclaiming memory occupied by objects that are no longer in use. Understanding the Garbage Collector and keeping memory footprint in check is crucial for optimizing application performance and preventing memory leaks.

  • Structural and Creational Design Patterns

    Structural and Creational Design Patterns provide reusable solutions to common software design problems. Evaluating this skill allows recruiters to assess the candidate's understanding of design patterns such as Singleton, Factory, and MVC, and their ability to apply these patterns to create flexible and maintainable code.

  • C# Multithreading

    C# Multithreading involves executing multiple threads simultaneously to achieve concurrent execution and improve performance. Measuring this skill helps identify candidates who are proficient in writing efficient and thread-safe code, enabling them to leverage parallelism and optimize resource utilization in multi-threaded applications.

  • C# Networking

    C# Networking involves developing applications that communicate over network protocols such as TCP/IP or UDP. This skill is important to measure as it assesses the candidate's ability to implement networking functionalities, handle client-server communication, and troubleshoot network-related issues in C# applications.

  • 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# Online Test to be based on.

    Variables
    Data Types
    Operators
    Control Structures
    Arrays
    Strings
    Functions
    Classes
    Objects
    Methods
    Inheritance
    Polymorphism
    Exception Handling
    Null Checking
    Garbage Collection
    Memory Management
    Structural Design Patterns
    Creational Design Patterns
    Multithreading
    Thread Synchronization
    Thread Pooling
    Networking Basics
    Socket Programming
    HTTP/HTTPS Requests
    Serialization
    Deserialization
    LINQ
    Delegates
    Events
    Generics
    Async/Await
    Reflection
    File I/O
    XML Handling
    JSON Handling
    Database Connectivity
    ADO.NET
    Entity Framework
    Exception Types
    Custom Exception Handling
    Delegate with Lambda Expressions
    Attributes
    Code Optimization
    Unit Testing
    Debugging
    Version Control
    C# Compiler Directives
    Casting and Conversion
    Generic Collections
    Anonymous Types
    Lambda Expressions
    LINQ Query Expressions
    Dependency Injection
    Service Locator
    TCP/IP Networking
    Socket Options
    Asynchronous Networking

What roles can I use the C# Online Test for?

  • C# Developer
  • C# Programmer
  • Senior C# Engineer
  • Software Developer (C#)
  • C# .NET Developer
  • System Analyst (C#)
  • Unity Programmer
  • Senior Software Engineer (C#)

How is the C# 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

  • Strong grasp of LINQ (Language Integrated Query)
  • Familiarity with Async and Await in C#
  • Experience with Unit Testing in C#
  • Knowledge of Reflection and Attributes in C#
  • Proficiency in Serialization and Deserialization in C#
  • Understanding of Event handling in C#
  • Familiarity with C# File I/O operations
  • Knowledge of Regular Expressions in C#
  • Experience with C# Web Services (WCF, ASP.NET Web API)
  • Understanding of Dependency Injection in C#

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

Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.


85%
reduction in screening time

C# Hiring Test FAQs

Can I evaluate .NET along with C#?

Yes. We support evaluating C# and .NET in the same assessment. You can review our standard ready-to-go C# + .NET test to understand how the assessment would be designed. For customized assessments, we design the questions as per your job description and the final test will evaluate C#, .NET and coding skills together.

Can I evaluate .NET MVC in the same assessment?

Yes. We support evaluating C# and .NET MVC in the same assessment. For customized assessments, we design the questions as per your job description and the final test will evaluate C#, .NET MVC and coding skills together.

Can I evaluate frontend skills along with C#?

Yes. You can evaluate multiple skills in a single assessment. You can check our standard HTML/ CSS, React, Angular, Vue assessments to get a sense of what questions would be asked. You can get a custom assessment designed that has questions to evaluate all the must-have skills of your job description. So for a standard Full Stack React C# developer role, the test will have questions to evaluate React, JavaScript, HTML/ CSS, ASP.NET, C# and coding skills.

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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