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.

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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About the C++ 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 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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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++ Online Test will be non-googleable.

🧐 Question
Medium Overloading OOPs Code Analysis Logic Understanding	Solve
What will the following C++ code output?
Medium Exceptions Exceptions C++ Code Output Analysis Exception Handling	Solve
What will the following C++ code output?
Easy Namespaces Namespace Management C++ Syntax	Solve
What will the following C++ code output?
Medium Struct Class	Solve
What will the following C++ code output?
Easy Registration Queue Logic Queues Sorting By Custom Order	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 String Parsing Character Counting	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 Code Analysis Logic Understanding	2 mins C++	Solve
What will the following C++ code output?
	Medium Exceptions Exceptions C++ Code Output Analysis Exception Handling	2 mins C++	Solve
What will the following C++ code output?
	Easy Namespaces Namespace Management C++ Syntax	2 mins C++	Solve
What will the following C++ code output?
	Medium Struct Class	2 mins C++	Solve
What will the following C++ code output?
	Easy Registration Queue Logic Queues Sorting By Custom Order	30 mins Coding	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 String Parsing Character Counting	30 mins Coding	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	💪 Difficulty	⌛ Time
	Overloading OOPs Code Analysis Logic Understanding	C++	Medium	2 mins	Solve
What will the following C++ code output?
	Exceptions Exceptions C++ Code Output Analysis Exception Handling	C++	Medium	2 mins	Solve
What will the following C++ code output?
	Namespaces Namespace Management C++ Syntax	C++	Easy	2 mins	Solve
What will the following C++ code output?
	Struct Class	C++	Medium	2 mins	Solve
What will the following C++ code output?
	Registration Queue Logic Queues Sorting By Custom Order	Coding	Easy	30 mins	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
	Visitors Count Strings Logic String Parsing Character Counting	Coding	Medium	30 mins	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.

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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:

Able to work with various data types and variables
Understands and applies operators
Proficient in using functions, modules, and data structures
Able to work with pointers and references
Capable of utilizing existing classes and creating new classes
Knowledgeable in OOPS concepts such as inheritance, polymorphism, and overloading
Familiar with the memory model and memory management
Adept in utilizing STL features like arrays, vectors, maps, and sets
Experienced in working with functions and class templates

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 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.

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.

Data Types

Variables

Operators

Functions

Modules

Data Structures

Pointers

References

Existing Classes

New Classes

Inheritance

Polymorphism

Overloading

Memory Model

Memory Management

STL Arrays

STL Vectors

STL Maps

STL Sets

Function Templates

Class Templates

File I/O

Error Handling

Exceptions

Concurrency

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

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

Able to read from and write to files
Skilled in catching errors and handling exceptions
Proficient in utilizing concurrency features
Advanced understanding and application of functions, modules, and data structures
Capable of advanced utilization of pointers and references
Skilled in utilizing existing complex classes and creating new complex classes

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++ Hiring Test?

What is C++ Online Test?

The C++ Online Test is designed to evaluate a candidate's proficiency in C++ programming. It is used by recruiters to identify skilled developers for roles requiring C++ expertise.

Can I combine C++ test with C questions?

Yes, recruiters can request a custom test that includes questions from both C++ and C. For more details on how we assess C skills, check out our C Online Test.

What topics are evaluated in the C++ Online Test?

The test covers:

C++ basics (Data Types, Variables, Operators)
Functions, modules, and data structures
Pointers and references
Using existing classes and creating new classes
OOPS concepts
Memory management
STL (arrays, vectors, maps, sets)
Templates
File handling
Error handling
Concurrency features

How to use C++ Online Test in my hiring process?

You can use this test at the beginning of your recruitment process as a pre-screening tool. Add the test link to your job post or directly invite candidates via email to seamlessly identify skilled candidates.

Can I test C++ and Python together in a test?

Yes, you can test both C++ and Python in a single assessment. This is recommended for roles requiring proficiency in both languages. Check out our C++ & Python Test.

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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Along with scorecards that report the performance of the candidate in detail, you also receive a comparative analysis against the company average and industry standards.

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