C++ is a versatile programming language that supports everything from computer games and operating systems to databases and web browsers. It’s also one of the longest-running languages still in use today, ranking among the most requested and used programming language names.
Although it is a preferred choice, C++ brings with it its own complexity, and learning it must be approached with care, looking at even the smallest detail or particularity.
If you have a C++ interview coming up but you’re a beginner and feeling confused, to help you out, we’ve put together a list of the most frequently asked C++ questions during an interview, as well as guiding you to the right answers to give.
In addition to prospective employees, the list of questions is also suitable for hiring managers who want to get a good idea of a candidate’s theoretical knowledge in order to make an excellent choice and give the right person a chance.
C++ for beginners interview questions are designed for entry level or junior C++ positions where candidates have a basic understanding of the programming language.
Most Frequently Asked C++ Questions for Beginners During Interview
1. What are the main features of C++ as a programming language?
C++ is a general-purpose programming language, which means that it supports software in a variety of application areas.
It is also considered a multiparadigm programming language, which means that it supports object-oriented, functional, and general programming frameworks.
Other notable features are its portability, power, and complexity, making it one of the most difficult programming languages to learn.
2. What are the main differences between C and C++?
C and C++ have many similarities in terms of syntax and compilation, yet there are several major differences between the two languages:
C does not support object-oriented programming concepts such as polymorphism and encapsulation, unlike C++.
C++ supports several new features such as namespace, variable reference functionality, operator overloading, and function overloading.
3. What are the strengths of C++?
C++ has many strengths, including:
Portability: C++ programs can be used in different operating systems.
Multi-paradigm frameworks: C++ offers great flexibility in programming, supporting object-oriented, generic and procedural programming frameworks
Scalability: C++ is a powerful programming language that can be used to create resource-intensive programs as well as simpler low-level programs
4. What is a class in C++?
These are the basic building blocks of object-oriented programming in C++. A user-defined data type that represents a group of related objects. Classes store together member functions and variables.
5. What is an object in C++?
Objects are real-world entities that have state (some kind of data) and behavior (functionality). The related objects together constitute a class.
6. What is encapsulation in C++?
Encapsulation is an object-oriented programming concept that binds data and functions together. Encapsulation protects information from outside interference and is a key part of the data hiding process. Encapsulation is implemented using classes and access modifiers.
7. What is abstraction in C++?
Abstraction is an object-oriented programming concept that shows users only the essential information while hiding background details. Its purpose is to reduce the complexity of programming and is implemented using classes and access modifiers.
8. What is the difference between class and structure in C++?
Class and struct (or struct) are almost the same in C++, except for the default accessibility setting of member variables and methods. They are set to private in the class and public in the struct.
9. What is inheritance in C++?
Inheritance is an object-oriented programming concept in which one class acquires the properties and characteristics of another class. This allows users to easily reuse and extend existing attributes or behaviors.
10. What are the three types of access specifiers in C++?
Access specifiers define how the attributes and methods of a class can be accessed. The three types in C++ are:
Public: All members of the class can be accessed from anywhere in the program.
Private: Class members can only be accessed from member functions within the class
Protected: Class members can be accessed from member functions inside the class or from any subclass of the class.