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C++ Online Test

The C++ Online Test uses scenario-based and code tracing MCQ questions to evaluate a candidate's ability to write C++ programs (data types, functions, data structures, STL), structure the code using Object-oriented programming principles (classes, inheritance, polymorphism, overloading), handle exceptions and manage memory. The test uses coding questions to evaluate hands-on C++ coding skills.

Customized Based On:

  • Experience/ difficulty level
  • Multiple skills in 1 assessment
  • Job description/ role requirements

Covered Topics:

C++ basics (Data Types; Variables; Operators)
modules and data structures
Pointers and references
Using existing classes and creating new classes
OOPS (Inheritance; Polymorphism; Overloading)
Memory model and memory management
STL (arrays; vectors; maps; sets)
Functions and Class templates
Reading and writing to files
Catching errors and handling exceptions
Concurrency features
See full list
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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.

Human Resources Manager

Singapore Government

reduction in screening time

Sample C++ Online Test 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🔧 Skill💪 Difficulty⌛ Time
What will the following C++ code output?


  • 12(2)1
  • 21(2)(1)
  • 21(1)(2)
  • 12(2)13
  • 21(1)3(2)
  • 213(2)(1)
  • 1312(2)(1)
  • 1213(1)(2)
C++Medium2 min
What will the following C++ code output?


  • 00
  • 01
  • 10
  • 11
C++Easy2 min
Struct Class
What will the following C++ code output?


  • 1221
  • 1222
  • 1121
  • 1122
  • 2221
  • 2121
  • 2122
C++Medium2 min
What will the following C++ code output?


  • 1 2 ~1 ~2 !1 !2
  • 1 ~1 2 ~2 ~2
  • 2 !2 1 ~1
  • 2 ~2 1 ~1
  • 1 2 ~1 !2
  • 2 1 ~2 !2 ~1
C++Medium2 min

How to use the Adaface C++ Online Test

Start screening candidates within minutes with the ready-to-go C++ Online Test

1. Choose the most appropriate test for your role

2. Start inviting candidates to complete the assessment

3. Receive real time notifications and shortlist the best candidates

OR Customize the Adaface C++ Online Test according to your job description

1. Get a custom assessment from our library of 500+ skills within 48 hours

2. Start inviting candidates to complete the assesment

3. Receive real time notifications and shortlist the best candidates

Adaface C++ Online Test is trusted by enterprises worldwide

Morgan Stanley
SG Government
Ernst and Young
Optimum Solutions
United Nations
Love Bonito

About the Adaface C++ Assessment Test

Evaluate C++ technical and coding skills with Adaface skills assessment platform powered by an intelligent chatbot


Data Types
String manipulation
Object-oriented programming (OOP)
Classes and objects
Constructor, operator and function overloading
Smart Pointers
STL (Arrays, Vectors, Lists etc.)
Lambda expressions
IO Streams
File IO
Concurrent programming
Threads and pools
Mutex and Locks
Futures and Promises
Function templates
Errors and exception handling
Memory management
Functional programming

Recommended Roles:

C++ Developer
C++ Software Engineer
Backend Developer
Senior Software Engineer (C++)
C++ Systems Engineer
Senior C++ Developer
Embedded C++ Developer
Quant Developer (C++)

Why You Should Use This C++ Assessment Test

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 expensive engineering time by filtering out unqualified candidates.

The test screens candidates for the following skills:

  • C++ fundamentals (variables, branching and looping, functions, reference parameters, arrays, strings, vectors)
  • i/o operation on files and i/o streams
  • Memory management, including pointers, references, move & copy constructors
  • OOPs concepts (Classes, operator overloading, composition, inheritance, polymorphism, templates, concurrency, etc.)
  • Implementation of common data structures and algorithms
  • Efficient usage of in-built functions and pointers
  • Standard template library classes (Vectors, Sets, Queues)
  • Library Utilities - tuples, pairs, date & time
  • Exceptions handling

How does the test differ for Senior C++ developers?

Our subject matter experts customize the test according to seniority in two ways:

  • The topics chosen for senior developers will be of higher level whereas for junior developers the topics will be around the core basics. This will ensure that the senior developers are tested on on-the-job skills that they are expected to have
  • Difficulty level of questions will be varied based on the seniority level. This way senior developers are vetted on in-depth usage of the core topics whereas junior developers are vetted on the knowledge of core topics

Here are a few topics assessed in Senior developer assessments:

  • C++ concurrency (threads, mutex, package_task, future, async, promise)
  • Lock based thread-safe implementation of data structures
  • Advanced STL (priority queues, multi maps, multisets etc)
  • Creating own function templates and class templates
  • Non-STL Algorithms
  • Memory management, including pointers, references, move & copy constructors
  • Avoiding memory leaks and using RAII strategy with unique pointers, shared pointers and weak pointers
  • Knowledge of interface segregation and dependency inversion
  • Functional Programming and inversion of control

Distribution Of Test Scores

The actual score distribution will vary based on your candidate pipeline quality, but you should typically expect ~20% of the candidates to do well on Adaface assessments.

The score distribution for our assessments follow the normal curve. This is a good sign- standardized tests like SAT and GRE follow the normal distribution (bell curve).

Status quo assessments typically have the exact opposite of the bell curve (too many candidates getting close to 0, too many candidates getting close to 100 and too few candidates in the middle). This is typically because they focus on theoretical questions or trick questions, which are very binary in nature- either you know the trick/ theory or you don’t.

How Adaface Is Different

Adaface conversational assessments are reflective of on-the-job skills and see an 86% completion rate as compared to ~50% for traditional assessment platforms.



Theoretical questions/ puzzles

Feels like a test

One-size-fits-all assessments




Questions for on-the-job skills




C++ Online Test FAQs

Can I evaluate C++ and Embedded C in the same test?

Yes. You can review our standard Embedded C test to get a sense of how Embedded C is evaluated. The final assessment would have questions to evaluate Embedded C, C++ and Coding skills.

What is a custom assessment?

Every role is different and requires a custom assessment to identify top candidates efficiently. Adaface subject matter experts understand your job description/ role requirements and pick the most relevant questions from our library of 10000+ questions to create a technical assessment that helps you find the qualified candidates in your candidate pipeline quickly. All custom assessments are set up based on the job description, role requirements, must-have skills, experience level and salary range within a maximum of 48 hours and you will get an email notification once it goes live.

Check out a sample assessment here (no credit card required).

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.

How is Adaface different from other assessment tools?

We believe that status quo tech assessment platforms are not a fair way for companies to evaluate engineers because they focus on trick questions/ puzzles/ niche algorithms. We started Adaface to help companies find great engineers by assessing on-the-job skills required for a role. Read more about why we started Adaface.

Here's what's different with Adaface:

  • High quality non-googleable questions that test for on-the-job skills as opposed to theoretical knowledge.
  • A friendly conversational assessment with a chatbot, instead of sending a "test" to a candidate. This translates to a higher completion rate. Adaface assessments (86% candidate completion rate), as opposed to traditional tests (40-50% candidate completion rate)
  • Customized assessments for 700+ skills at different experience levels.

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

We have the following anti-cheating features in place:

  • Web proctoring
  • Webcam proctoring
  • Plagairism detection
  • Non-googleable questions
  • Secure browser

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?

The platform is completely self-serve, so here's one way to proceed:

  • You can sign up for free to get a feel for how it works.
  • The free trial includes one sample assessment (Java/ JavaScript) that you will find in your dashboard when you sign up. You can use it to review the quality of questions, and the candidate experience of a conversational test on Adaface.
  • To review the quality of questions, you can also review our public questions for 50+ skills here.
  • Once you're convinced that you want to try it out with real assessments and candidates, you can pick a plan according to your requirements.

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.

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

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