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C#, .NET & SQL Online Test

About the test:

The C#, .NET & SQL Test uses scenario-based MCQs to evaluate candidates on their proficiency in C# programming language and the .NET Framework for software development, as well as their understanding of SQL database management. The test assesses candidates' understanding of topics such as object-oriented programming, data structures, algorithms, error handling, and SQL queries. Candidates are evaluated on their ability to use C# and the .NET Framework to develop scalable applications, interact with databases, design database schemas, and write optimized and secure SQL queries for data manipulation and retrieval.

Covered skills:

  • C# Syntax Basics
  • C# Data structures
  • .NET API Development
  • SQL Joins and Indexes
  • C# OOPs
  • .NET MVC
  • SQL CRUD Operations
  • C# Programming

9 reasons why
9 reasons why

Adaface C#, .NET & SQL Test is the most accurate way to shortlist C# Developers



Reason #1

Tests for on-the-job skills

The C#, .NET & SQL 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:

  • Understanding basic C# syntax and data structures
  • Proficiency in object-oriented programming concepts in C#
  • Ability to develop applications using .NET MVC framework
  • Experience in API development using .NET
  • Effective understanding of SQL CRUD operations
  • Proficiency in SQL joins and indexes
  • Ability to handle exceptions and errors in C#
  • Experience in C# programming
  • Strong understanding of C# OOPs
  • Knowledge of C# data structures
  • Ability to perform SQL CRUD operations
  • Effective understanding of SQL joins and indexes
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#, .NET & SQL 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

Medium

AppDomain Resource Scoping
Configuration Management
AppDomain
Resource Scoping
Solve
Consider a scenario where you have a .NET application that needs to load different configurations for different components running in separate AppDomains. You have the following code structure:
 image
The `ConfigManager` class is designed to load and store configurations for different domains. What will be the output of this program, assuming `ConfigA.xml` and `ConfigB.xml` contain distinct settings?
A: Config in DomainA: [Settings from ConfigA.xml], Config in DomainB: [Settings from ConfigB.xml]
B: Config in DomainA: null, Config in DomainB: null
C: Config in DomainA: [Settings from ConfigB.xml], Config in DomainB: [Settings from ConfigA.xml]
D: A runtime exception is thrown due to cross-domain operation.
E: Config in DomainA: [Settings from ConfigA.xml], Config in DomainB: [Settings from ConfigA.xml]
F: The output is unpredictable and depends on the runtime environment.

Medium

IDisposable Pattern
Garbage Collection
IDisposable Pattern
Memory Management
Solve
Consider the following .NET C# code snippet implementing IDisposable pattern:
 image
What is true about the garbage collection and resource management in this code?
A: The finalizer will always be called when the object is garbage collected.
B: The `Dispose` method is only called when explicitly invoked.
C: Managed resources will be freed in the finalizer.
D: Unmanaged resources are only freed if `Dispose` is called with `true`.
E: The `GC.SuppressFinalize` method prevents the finalizer from being called.
F: The `using` statement ensures that unmanaged resources are always freed.

Medium

Remoting and Object Lifetime
.NET Remoting
Object Lifetime
MarshalByRefObject
Solve
In a .NET application, you are using .NET Remoting to communicate between different application domains. You have the following server-side code:
 image
This `RemoteObject` class is hosted in one application domain and accessed from another. Considering the lease settings (InitialLeaseTime, SponsorshipTimeout, RenewOnCallTime), what will happen if a client accesses the `GetData` method every 3 seconds?
A: The object will be disconnected after 5 seconds, regardless of the calls.
B: The lease will be renewed, and the object remains accessible as long as it's called every 3 seconds.
C: The object will be disconnected after 7 seconds, even with the regular calls.
D: An exception will be thrown due to lease timeout.
E: The lease will be renewed indefinitely without disconnection.
F: The object will be disconnected only if there is a call after 5 seconds but within 7 seconds.

Medium

Multi Select
JOIN
GROUP BY
Solve
Consider the following SQL table:
 image
How many rows does the following SQL query return?
 image

Medium

nth highest sales
Nested queries
User Defined Functions
Solve
Consider the following SQL table:
 image
Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
 image

Medium

Select & IN
Nested queries
Solve
Consider the following SQL table:
 image
Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
 image

Medium

Sorting Ubers
Nested queries
Join
Comparison operators
Solve
Consider the following SQL table:
 image
What will be the first two tuples resulting from the following SQL command?
 image

Hard

With, AVG & SUM
MAX() MIN()
Aggregate functions
Solve
Consider the following SQL table:
 image
How many tuples does the following query return?
 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

Medium

AppDomain Resource Scoping
Configuration Management
AppDomain
Resource Scoping

3 mins

.NET
Solve

Medium

IDisposable Pattern
Garbage Collection
IDisposable Pattern
Memory Management

2 mins

.NET
Solve

Medium

Remoting and Object Lifetime
.NET Remoting
Object Lifetime
MarshalByRefObject

3 mins

.NET
Solve

Medium

Multi Select
JOIN
GROUP BY

2 mins

SQL
Solve

Medium

nth highest sales
Nested queries
User Defined Functions

3 mins

SQL
Solve

Medium

Select & IN
Nested queries

3 mins

SQL
Solve

Medium

Sorting Ubers
Nested queries
Join
Comparison operators

3 mins

SQL
Solve

Hard

With, AVG & SUM
MAX() MIN()
Aggregate functions

2 mins

SQL
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
AppDomain Resource Scoping
Configuration Management
AppDomain
Resource Scoping
.NET
Medium3 mins
Solve
IDisposable Pattern
Garbage Collection
IDisposable Pattern
Memory Management
.NET
Medium2 mins
Solve
Remoting and Object Lifetime
.NET Remoting
Object Lifetime
MarshalByRefObject
.NET
Medium3 mins
Solve
Multi Select
JOIN
GROUP BY
SQL
Medium2 mins
Solve
nth highest sales
Nested queries
User Defined Functions
SQL
Medium3 mins
Solve
Select & IN
Nested queries
SQL
Medium3 mins
Solve
Sorting Ubers
Nested queries
Join
Comparison operators
SQL
Medium3 mins
Solve
With, AVG & SUM
MAX() MIN()
Aggregate functions
SQL
Hard2 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#, .NET & SQL 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#, .NET & SQL 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#, .NET & SQL Assessment Test

Why you should use Pre-employment C#, .NET & SQL Online Test?

The C#, .NET & SQL 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:

  • Understanding of C# syntax basics
  • Strong knowledge of C# Object-Oriented Programming concepts
  • Proficiency in working with C# Data structures
  • Experience in developing .NET MVC applications
  • Ability to develop APIs using .NET framework
  • Expertise in SQL CRUD operations
  • Understanding of SQL Joins and Indexes
  • Proficiency in C# programming concepts
  • Knowledge of C# threading and parallel programming
  • Familiarity with C# LINQ and Lambda expressions

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#, .NET & SQL Online Test?

  • C# Syntax Basics

    C# Syntax Basics refers to the fundamental rules and principles that govern the structure and composition of the C# programming language. It includes concepts such as variable declaration, data types, operators, conditionals, loops, and basic input/output. Measuring this skill is important to assess a candidate's foundational understanding of C# syntax, which is crucial for writing correct and efficient code.

  • C# OOPs

    C# OOPs (Object-Oriented Programming) encompasses the principles and techniques used to design and implement software using objects, classes, inheritance, encapsulation, and polymorphism in C#. Assessing this skill is necessary to evaluate a candidate's ability to create modular and reusable code, as well as their comprehension of object-oriented design principles.

  • C# Data structures

    C# Data structures involve the organization, storage, and manipulation of data in memory. It includes concepts such as arrays, lists, queues, stacks, dictionaries, and linked lists. Testing this skill is important to gauge a candidate's proficiency in selecting and utilizing appropriate data structures for efficient data management and algorithmic problem-solving.

  • .NET MVC

    .NET MVC (Model-View-Controller) is a framework for building scalable and maintainable web applications using the Model-View-Controller architectural pattern. Evaluating this skill is essential to assess a candidate's understanding of the MVC pattern, their capability to develop web applications with separation of concerns, and their knowledge of the ASP.NET ecosystem.

  • .NET API Development

    .NET API Development entails creating robust and secure APIs (Application Programming Interfaces) using the .NET framework. Testing this skill helps determine a candidate's ability to design, develop, and deploy APIs that enable seamless communication between different software systems and services, following industry best practices.

  • SQL CRUD Operations

    SQL CRUD (Create, Read, Update, Delete) Operations refer to the fundamental operations performed on a database: creating new records, retrieving existing records, updating records, and deleting records. Measuring this skill is important to assess a candidate's proficiency in writing efficient SQL queries to manipulate and manage data, which is a crucial aspect of database-driven applications.

  • SQL Joins and Indexes

    SQL Joins and Indexes are methods used to combine data from multiple database tables and optimize query performance, respectively. Evaluating this skill helps determine a candidate's understanding of how to efficiently retrieve related data from multiple tables using join operations, as well as their knowledge of indexing techniques for improving overall database performance.

  • C# Programming

    C# Programming assesses a candidate's overall proficiency in the C# programming language, including their understanding of advanced concepts, best practices, and their ability to solve complex problems using C#. Testing this skill is crucial to evaluate a candidate's coding skills, logical thinking, and ability to write clean and efficient code for various software development scenarios.

  • 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#, .NET & SQL Test to be based on.

    Variables
    Data Types
    Operators
    Control Statements
    Loops
    Arrays
    Structures
    Classes and Objects
    Inheritance
    Polymorphism
    Abstraction
    Encapsulation
    .NET Framework
    .NET MVC
    Routing
    Views
    Controllers
    Models
    Filters
    Attribute Routing
    Web API
    RESTful Services
    HTTP Verbs
    Serialization
    CRUD Operations
    ORM (Entity Framework)
    SQL Basics
    Joins
    Indexes
    Normalization
    Stored Procedures
    Functions
    Views
    Triggers
    Transactions
    Exception Handling
    Delegates
    Events
    Lambda Expressions
    LINQ
    Generics
    Collections
    Multithreading
    File I/O
    Reflection
    Serialization
    Regular Expressions
    Unit Testing
    Debugging
    Memory Management
    Code Optimization
    Async/Await

What roles can I use the C#, .NET & SQL Online Test for?

  • C# Developer
  • .NET Developer
  • Database Administrator
  • Full Stack Developer
  • SQL Developer
  • Database Developer

How is the C#, .NET & SQL 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

  • Ability to design and implement scalable and efficient code
  • Experience in performance optimization of C# applications
  • Proficiency in debugging and troubleshooting C# code
  • Knowledge of C# unit testing frameworks
  • Understanding of .NET Core and its features
  • Working knowledge of ASP.NET and web services
  • Experience in building Windows desktop applications using C#
  • Proficiency in designing and implementing database schemas
  • Knowledge of database optimization techniques
  • Understanding of software design patterns and principles

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#, .NET & SQL Hiring Test FAQs

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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40 min tests.
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