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G++ is a free, open-source, general-purpose compiler for the C++ programming language. It was originally developed by Bjarne Stroustrup at Bell Labs in the early 1980s. The latest version, G++ 11, was released in 2021. G++ is used by many large software projects, including the Linux kernel, the GNU Compiler Collection, and the Apache Software Foundation. It is also widely used in academia and research. G++ is a powerful and versatile compiler that can be used to compile C++ code for a wide variety of platforms. It is also known for its high performance and reliability.

Ask the right questions secure the right G++ talent among an increasingly shrinking pool of talent.

First 20 minutes

General G++ app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in G++ application development, including their experience with various programming languages, databases, and their approach to designing scalable and maintainable systems.

What are the basic data types in C++?

The basic data types in C++ are int, char, float, and double.

How would you declare a pointer in C++?

To declare a pointer in C++, you would use the asterisk symbol. For example, 'int* p;' declares a pointer to an integer.

What is the purpose of the 'this' pointer in C++?

'this' is a keyword in C++ which is a pointer that points to the object which invokes the member function.

Describe the difference between a class and a structure in C++.

The main difference between a class and a structure in C++ is the default access level. For a class, members are private by default, while for a structure, they are public.

What are virtual functions in C++?

Virtual functions are member functions of a class, and they can be overridden in derived classes. They are mainly used to achieve Runtime polymorphism.

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What you’re looking for early on

Does the candidate demonstrate a deep understanding of G++ and its features?

Has the candidate shown experience with complex problem solving?

Is the candidate able to communicate effectively about technical concepts?

Does the candidate show a willingness to learn and adapt to new technologies?

Next 20 minutes

Specific G++ development questions

The next 20 minutes of the interview should focus on the candidate's expertise with specific backend frameworks, their understanding of RESTful APIs, and their experience in handling data storage and retrieval efficiently.

How would you handle exceptions in C++?

Exceptions in C++ are handled using three keywords: try, catch, and throw. The code that can potentially throw an exception is put in the try block, the exception is caught in the catch block, and exceptions are thrown using the throw keyword.

What is the use of the 'new' and 'delete' operators in C++?

The 'new' operator is used to allocate memory dynamically on the heap for a variable or an array during runtime. The 'delete' operator is used to free up the memory allocated dynamically.

What are templates in C++?

Templates are powerful features of C++ which allows you to write generic programs. In simple terms, you can create a single function or a class to work with different data types using templates.

Describe the difference between deep copy and shallow copy.

Shallow copy copies all the member values from one object to another. A deep copy does all what shallow copy does and also deep copies pointers, i.e., memory is allocated to the new object for the pointer and an actual copy of the pointed value is made into the new object.

What is the function of the STL in C++?

STL or Standard Template Library in C++ is a library of template classes. It provides four components called algorithms, containers, functions, and iterators.

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At this point, a skilled G++ engineer should demonstrate strong problem-solving abilities, proficiency in G++ programming language, and knowledge of software development methodologies. Red flags include lack of hands-on experience, inability to articulate complex concepts, or unfamiliarity with standard coding practices.

Digging deeper

Code questions

These will help you see the candidate's real-world development capabilities with G++.

What does the following code do?
#include
using namespace std;
int main(){
int a = 10;
int b = 20;
int sum = a + b;
cout << sum;
return 0;
}
The code adds two integers, 10 and 20, and prints the sum, which is 30.
What will be the output of the following code?
#include
using namespace std;
int main(){
int a = 10;
int b = 20;
if(a > b){
cout << a;
} else {
cout << b;
}
return 0;
}
The code will output 20, because it checks if 'a' is greater than 'b'. If 'a' is greater, it prints 'a', otherwise it prints 'b'. In this case, 'b' is greater.
What does the following code do?
#include
using namespace std;
int main(){
int arr[5] = {1, 2, 3, 4, 5};
for(int i = 0; i < 5; i++){
cout << arr[i] << ' ';
}
return 0;
}
The code initializes an array of 5 integers, then iterates over the array and prints each element separated by a space.
What does the following code do?
#include
#include
using namespace std;
void function1(){
cout << 'Hello, World!';
}
int main(){
thread t1(function1);
t1.join();
return 0;
}
The code creates a new thread 't1' that runs 'function1'. 'function1' prints 'Hello, World!'. The 'join' function is used to make the main thread wait until 't1' finishes execution.

Wrap-up questions

Final candidate for G++ Developer role questions

The final few questions should evaluate the candidate's teamwork, communication, and problem-solving skills. Additionally, assess their knowledge of microservices architecture, serverless computing, and how they handle G++ application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

How would you implement multithreading in C++?

Multithreading can be implemented in C++ using the thread library. It allows you to create multiple threads to execute concurrently.

What is a lambda function in C++?

A lambda function is a special type of function that is defined inside another function, mainly used for convenience when a function is used only once.

Describe the difference between overloading and overriding in C++.

Overloading is when two or more methods in one class have the same method name but different parameters. Overriding means having two methods with the same method name and parameters, one in the parent class and the other in the child class.

G++ application related

Product Perfect's G++ development capabilities

Beyond hiring for your G++ engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in G++ projects, and can engage in multiple capacities.

G++ Consultive assessments

G++ Application Conversion Assessment G++ Application Integration Assessment G++ Data & Database Integration Assessment

Custom G++ development projects

Custom G++ App Conversion G++ Custom App Development Process App UI Design for G++ Facelifts

Hiring guide for G++ Engineers

G++ Developer Hiring Guide

What you’re looking for early on

The ideal back-end app developer

What you’re looking to see on the G++ engineer at this point.

G++ Consultive assessments

Custom G++ development projects