If you are planning to appear for a Java and C++ language related certification test, then this C++ Programming Quiz is a must for you. In this quiz, we’ve added twenty important C++ questions to test your knowledge. We’ve specially designed this quiz so that you can quickly acquaint of the pattern of questions asked during interviews. You’ll find all types of C++ questions which are related to inheritance, overloading, abstraction, and virtual polymorphism. If you are a Unix/Linux geek, then you should also try our shell scripting quizzes.
This C++ Programming Quiz would test both your concepts and programming skills. It comprises of questions similar to “How many storage classes does C++ support?”, “What is an abstract class in C++?”, “What’s the use of ‘this’ pointer in C++?”, “What is a destructor? Does it support overloading?”, “Which operator allows dynamic memory allocation?”, and “Can you use malloc function to allocate memory for a C++ object?”. So this questionnaire would test the depth of your knowledge. Also, if you like Java programming language, then do practice Java by attempting this entry level quiz for Java developers.
20 Questions – C++ Programming Quiz
Answer Key with Reasoning
Here’s a concise reasoning table explaining the correct answers for all 20 C++ questions:
| Q# | Correct Answer | Reasoning |
|---|---|---|
| 1 | Visible variables may lack scope. | A variable can be visible but may not have a defined scope in a specific block or function. |
| 2 | Inline | Classes in C++ can be virtual, friend, and generic, but inline is a function-specific keyword. |
| 3 | template | The template keyword is used for generic programming but isn’t specific to classes. |
| 4 | constant functions | const member functions prevent modification of member variables. |
| 5 | Compiler may inline function. | The compiler decides whether to inline a function, even if marked inline. |
| 6 | Pass by reference | C++ introduced pass-by-reference (&), which isn’t available in C. |
| 7 | Small, frequently used | Inline functions should be small and frequently used to improve performance by reducing function call overhead. |
| 8 | Use const parameters | Marking reference parameters as const prevents accidental modifications. |
| 9 | Modifies original variable. | Pass-by-reference allows direct modification of the original variable instead of creating a copy. |
| 10 | Integer & fraction | Floating-point numbers consist of both integer and fractional parts. |
| 11 | Statically typed | C++ requires variable types at compile-time, making it statically typed. |
| 12 | this pointer | this is an implicit pointer passed to all non-static member functions, referring to the calling object. |
| 13 | <pre>X(const X& arg)</pre> | Copy constructors accept a reference to another object to avoid infinite recursion. |
| 14 | Scope resolution | The :: (scope resolution) operator cannot be overloaded in C++. |
| 15 | Use pure virtual functions | Interface classes in C++ contain only pure virtual functions (= 0). |
| 16 | Reflection | C++ lacks built-in reflection (introspection) like Java or Python. |
| 17 | virtual | The virtual keyword enables runtime (dynamic) method binding. |
| 18 | False | Signed and unsigned parameters are not considered distinct types in function overloading. |
| 19 | C++ ++ | Pointer str is incremented, shifting the string output by one character. |
| 20 | Hide data | Classes provide encapsulation, restricting access to internal data. |
Key Takeaways from C++ Programming Quiz
Hope, you have enjoyed the C++ Programming Quiz. The questions in this quiz are not only important for the interviews, but you can use this knowledge in real-time C++ Programming projects. While coding it indeed helps if you already know the real meaning of the syntax you are using and why you are using it. Also, if we have a good hold of the concept, then it’s easy to create a solution which suits the best for clients.
Before we close for the day, just listen to what the famous Randall E. Stross has to say.
“The best programmers are not marginally better than merely good ones. They are an order-of-magnitude better, measured by whatever standard: conceptual creativity, speed, the ingenuity of design, or problem-solving ability.”
