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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.

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Screen candidates with a 45 mins test

Test duration:  45 mins
Difficulty level:  Moderate
Availability:  Ready to use
Questions:
  • 10 C++ MCQs
  • 1 C++ Coding Question
Covered skills:
C++ basics (Data Types; Variables; Operators)
Functions
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
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Adaface is used by 1500+ businesses in 80 countries.

Adaface skill assessments measure on-the-job skills of candidates, providing employers with an accurate tool for screening potential hires.

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Use the C++ Test to shortlist qualified candidates

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:

  • Able to understand and use C++ data types, variables, and operators effectively
  • Proficient in creating and utilizing functions, modules, and data structures in C++
  • Skilled in working with pointers and references in C++
  • Capable of using existing classes and creating new classes in C++
  • Understanding and application of Object-Oriented Programming concepts including inheritance, polymorphism, and overloading
  • Knowledge and practical experience of the C++ memory model and memory management
  • Familiarity with Standard Template Library (STL) and its implementations such as arrays, vectors, maps, and sets
  • Ability to work with functions and class templates in C++
  • Proficient in reading from and writing to files in C++
  • Skilled in catching errors and handling exceptions in C++
  • Understanding of concurrency features in C++
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Screen candidates with the highest quality 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++ Online Test will be non-googleable.

🧐 Question

Medium

Overloading
OOPs
Solve
What will the following C++ code output?
 image

Medium

Exceptions
Exceptions
Solve
What will the following C++ code output?
 image

Easy

Namespaces
Solve
What will the following C++ code output?
 image

Medium

Struct Class
Solve
What will the following C++ code output?
 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

Medium

Overloading
OOPs

2 mins

C++
Solve

Medium

Exceptions
Exceptions

2 mins

C++
Solve

Easy

Namespaces

2 mins

C++
Solve

Medium

Struct Class

2 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
Overloading
OOPs
C++
Medium2 mins
Solve
Exceptions
Exceptions
C++
Medium2 mins
Solve
Namespaces
C++
Easy2 mins
Solve
Struct Class
C++
Medium2 mins
Solve
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve

Test candidates on core C++ Hiring Test topics

C++ Basics: C++ Basics covers the fundamental building blocks of the C++ programming language, including data types, variables, and operators. This skill is essential to assess as it forms the foundation for understanding and writing C++ code accurately and efficiently.

Functions, Modules and Data Structures: This skill focuses on the use of functions, modules, and data structures in C++. It is important to measure this skill as it demonstrates the candidate's ability to organize code, manage dependencies, and implement efficient data structures for optimal performance.

Pointers and References: Pointers and references are advanced concepts in C++ that allow for more efficient memory management and manipulation. Measuring this skill helps assess a candidate's understanding of memory allocation, addressing, and the ability to work with complex data structures.

Using Existing Classes and Creating New Classes: Assessing the candidate's ability to work with existing classes and create new classes is crucial for determining proficiency in object-oriented programming. This skill showcases the candidate's knowledge of encapsulation, inheritance, and abstraction, which are fundamental concepts in OOP.

OOPS (Inheritance, Polymorphism, Overloading): OOPS, which stands for Object-Oriented Programming (OOP) concepts such as inheritance, polymorphism, and overloading, is a key skill to measure in this test. It helps determine the candidate's understanding of code reuse, flexibility, and extensibility, which are essential principles in designing and implementing modular and maintainable code.

Memory Model and Memory Management: This skill evaluates the candidate's understanding of how memory is organized and managed in C++. It is important to measure as it demonstrates the candidate's knowledge of memory allocation, deallocation, and optimization, which can greatly impact the performance and stability of a program.

STL (Arrays, Vectors, Maps, Sets): Assessing knowledge of the Standard Template Library (STL) in C++ is crucial as it provides a set of powerful data structures and algorithms that can greatly simplify and enhance code development. This skill indicates the candidate's familiarity with using commonly used data structures such as arrays, vectors, maps, and sets, which are essential for efficient and effective programming.

Functions and Class Templates: Understanding and working with function and class templates in C++ is important as it allows for generic programming and code reuse. Measuring this skill helps determine the candidate's ability to write flexible and reusable code that can be adapted to various data types and requirements.

Reading and Writing to Files: Being able to read and write data to files is a crucial skill in many real-world applications. Measuring this skill helps assess the candidate's ability to handle file I/O operations, which are essential for data persistence, configuration, and interaction with external resources.

Catching Errors and Handling Exceptions: Measuring this skill helps determine the candidate's ability to handle errors and exceptions in C++. It demonstrates their proficiency in implementing error detection, recovery, and graceful program termination, which contributes to the robustness and reliability of a software system.

Concurrency Features: Assessing knowledge of concurrency features in C++ is important as it enables multitasking, parallel execution, and efficient utilization of system resources. This skill demonstrates the candidate's understanding of threads, synchronization mechanisms, and the ability to write safe and efficient concurrent code.

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Have questions about the C++ Hiring Test?

How does pricing work?

You can check out our pricing plans.

Can I customize the test?

Yes, absolutely. Custom assessments are set up within 48 hours 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. You can also customize a test by uploading your own questions.

Can I combine multiple skills into one test?

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.

What roles can I use the C++ Test for?

Here are few roles for which we recommend this test:

  • C++ Developer
  • C++ Software Engineer
  • Backend Developer
  • Senior Software Engineer (C++)
  • C++ Systems Engineer
  • Senior C++ Developer
  • Embedded C++ Developer
  • Quant Developer (C++)
Can I see a sample test, or do you have a free trial?

Yes!

The free trial includes one sample technical test (Java/ JavaScript) and one sample aptitude test 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 giving a test on Adaface.

You can preview any of the 500+ tests and see the sample questions to decide if it would be a good fit for your requirements.

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.

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.

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