Top 150 C++ Interview Questions and Answers 2024

C is a procedural programming language while C++ is an extension of C with added features of object-oriented programming.

• C is a procedural language, while C++ supports both procedural and object-oriented programming.

• C++ has additional features like classes, objects, inheritance, and polymorphism.

• C++ supports function overloading and exception handling, which are not present in C.

• C++ has a standard template library (STL) that provides useful data structures and algorithms.

• C++ ...read more

Java is an object-oriented language with automatic memory management, while C++ is a compiled language with manual memory management.

• Java is platform-independent, while C++ is platform-dependent.

• Java has a simpler syntax and is easier to learn, while C++ is more complex and difficult to master.

• Java has built-in garbage collection, while C++ requires manual memory management.

• Java is used for developing web applications, mobile apps, and enterprise software, while C++ is used f...read more

Using auto keyword in local scope only ensures type safety and avoids unintended side effects.

• Auto keyword deduces the type of the variable from its initializer expression.

• Using auto in local scope avoids unintended type conversions and promotes type safety.

• Auto keyword should not be used for function parameters or class members.

• Example: auto x = 10; // x is deduced as int

• Example: auto y = 3.14; // y is deduced as double

The datatypes in C++ include fundamental types (int, float, bool), derived types (arrays, pointers, references), and user-defined types (classes, structures, unions).

• Fundamental types: int, float, bool

• Derived types: arrays, pointers, references

• User-defined types: classes, structures, unions

GetOption() method is used to retrieve the value of a selected option in a dropdown list.

• GetOption() method is commonly used in automated testing to verify if the correct option is selected in a dropdown list.

• The method returns the value of the selected option as a string.

• If no option is selected, the method returns null or an empty string.

To import user defined class from another file, use the import statement followed by the file path.

• Use the import statement followed by the file path to import the user defined class

• Make sure the file containing the class is in the same directory or specify the correct path

• Use the class name to access the class in the importing file

Armstrong number is a number whose sum of cubes of digits is equal to the number itself.

• Take input number from user

• Find the number of digits in the number

• Calculate the sum of cubes of each digit

• Check if the sum is equal to the input number

Updating is modifying the value of an existing object, while downcasting is converting an object of a superclass to an object of its subclass.

• Updating involves changing the value of an object's properties or fields.

• Downcasting is used when we have a reference to a superclass object and we want to treat it as an object of its subclass.

• Updating and downcasting are commonly used in object-oriented programming languages like C#.

• Example of updating: changing the name of a person o...read more

Assembly language can be embedded in C++ using inline assembly or by linking assembly files.

• Inline assembly can be used to write assembly code directly in C++ code.

• Assembly files can be linked with C++ code using the linker.

• Inline assembly can be platform-specific and may require different syntax for different architectures.

• Assembly code can be used to optimize critical sections of code for performance.

• Debugging assembly code can be difficult and error-prone.

I recently solved a puzzle involving finding the missing number in an array.

• The puzzle involved an array of integers with one missing number.

• I used the XOR operation to find the missing number.

• Here's an example: Given the array [1, 2, 4, 5], the missing number is 3.

C++ is a high-level programming language used for developing system software, application software, and video games.

• C++ is an extension of the C programming language

• It supports object-oriented programming concepts like classes, inheritance, polymorphism, etc.

• It is a compiled language and provides low-level memory manipulation features

• C++ is widely used in developing operating systems, device drivers, game engines, and financial software

• Some popular C++ libraries are STL, Boos...read more

Design patterns in C++ are reusable solutions to common problems in software design.

• Design patterns help in creating flexible, maintainable, and scalable code.

• Examples of design patterns in C++ include Singleton, Factory, Observer, and Strategy.

• Each design pattern has its own purpose and can be applied in different scenarios.

• Understanding design patterns can improve code quality and efficiency.

C++ function blueprint can be made callable in Unreal by creating a Blueprint Function Library.

• Create a new Blueprint Function Library in Unreal

• Add the C++ function to the library as a static function

• Compile the C++ code and refresh the library in Unreal

• The function can now be called from any Blueprint in the project

Memory management in C++ involves allocation and deallocation of memory using new and delete operators.

• Memory is allocated using new operator and deallocated using delete operator.

• Memory leaks can occur if memory is not deallocated properly.

• Smart pointers like unique_ptr and shared_ptr can be used to manage memory automatically.

• Memory can also be allocated on stack using automatic variables.

• Dynamic memory allocation can be used to allocate memory at runtime.

Q_Object Macro is a Qt macro used to declare a class as a QObject.

• Q_Object Macro is used to enable signals and slots mechanism in a class.

• It is used to declare a class as a QObject and to inherit from QObject.

• It is used to enable the use of Qt's meta-object system in a class.

• It is used to enable dynamic properties and object names in a class.

C++ code is written using a text editor and compiled using a compiler. The compiled code is then executed.

• Start by writing the code in a text editor like Visual Studio Code or Sublime Text

• Save the code with a .cpp extension

• Compile the code using a compiler like GCC or Clang

• Execute the compiled code in a terminal or command prompt

• Debug the code using a debugger like GDB or Visual Studio Debugger

The virtual keyword is used to allow a method to be overridden in a derived class. The override keyword is used to indicate that a method is intended to override a base class method.

• The virtual keyword is used in the base class to define a method that can be overridden in a derived class.

• The override keyword is used in the derived class to indicate that a method is intended to override a base class method.

• The virtual keyword is used to provide a default implementation of a me...read more

File System in C++ is used for managing files and directories, providing functions for file input/output operations.

• C++ provides the library for file input/output operations.

• File streams can be used to read from and write to files.

• Common file operations include opening, closing, reading, and writing files.

• File streams can handle different file types such as text files and binary files.

• File system functions like file existence check, file deletion, and file renaming are avail...read more

Preprocessor directives are commands used by the preprocessor to perform tasks before the actual compilation process begins.

• Preprocessor directives start with a # symbol.

• They are used to include header files, define constants, and perform conditional compilation.

• Examples include #include, #define, #ifdef, #ifndef, #endif, #pragma, etc.

The '==' operator checks for equality, while the '===' operator checks for strict equality (including data type).

• The '==' operator performs type coercion before comparing two values.

• The '===' operator does not perform type coercion and compares both value and data type.

• Example: 1 == '1' will return true, but 1 === '1' will return false.

I have taken computer classes in programming languages, operating systems, networking, and database management.

• Programming languages such as Java, C++, Python

• Operating systems like Windows, Linux, MacOS

• Networking concepts including TCP/IP, routers, switches

• Database management systems like MySQL, Oracle, SQL Server

A string literal is a sequence of characters enclosed in double quotes. One object is created on string initialization.

• String literals are used to represent constant values that cannot be modified.

• The object created on string initialization is stored in the string pool.

• String literals can be concatenated using the '+' operator.

• Example: String str = "Hello World";

A translation unit is a source file along with all the headers and source files included in it.

• Translation unit is the smallest unit of compilation in C++.

• It consists of a source file and all the header files and source files included in it.

• Each translation unit is compiled separately before being linked together.

• Translation units help in organizing and modularizing code.

• Example: If a.cpp includes b.h and c.cpp, then the translation unit for a.cpp would consist of a.cpp, b.h,...read more

I am familiar with technical language used in networking, operating systems, programming languages, and databases.

• Networking: TCP/IP, DNS, DHCP, VLANs

• Operating Systems: Windows, Linux, Unix

• Programming Languages: Java, Python, C++

• Databases: MySQL, Oracle, MongoDB

I have worked with various payroll software including ADP, Paychex, and QuickBooks.

• ADP

• Paychex

• QuickBooks

OOPs concepts include inheritance, polymorphism, encapsulation, and abstraction.

• Inheritance allows a class to inherit properties and methods from a parent class.

• Polymorphism allows objects to take on multiple forms and behave differently based on context.

• Encapsulation hides the implementation details of a class from other classes.

• Abstraction focuses on the essential features of an object and hides unnecessary details.

C++ multithreading allows for concurrent execution of multiple threads within a single program.

• Use mutexes to prevent race conditions and ensure thread safety

• Avoid deadlocks by carefully managing locks and avoiding nested locks

• Consider using condition variables to signal between threads

• Use thread pools to manage and reuse threads efficiently

• Be aware of potential performance issues and overhead with multithreading

Polymorphism in C++ allows objects of different classes to be treated as objects of a common superclass.

• Polymorphism is achieved through function overloading and overriding.

• Function overloading allows multiple functions with the same name but different parameters.

• Function overriding involves redefining a base class function in a derived class.

• Example: virtual functions in C++ enable polymorphism by allowing derived classes to override base class functions.

Concurrency in C++ allows multiple tasks to run simultaneously, improving performance and efficiency.

• Concurrency in C++ can be achieved using threads, mutexes, condition variables, and atomic operations.

• Threads allow multiple functions to run concurrently within the same program.

• Mutexes are used to protect shared data from being accessed by multiple threads simultaneously.

• Condition variables allow threads to wait for a certain condition to be met before proceeding.

• Atomic oper...read more

Lambda expressions are anonymous functions that can be used to create concise and readable code.

• Lambda expressions are used to create inline functions without a formal definition.

• They are often used in functional programming languages like Java, Python, and C++.

• Lambda expressions can be used to pass functions as arguments to higher-order functions.

• They are particularly useful for writing code that is more concise and readable.

• Example: (x, y) -> x + y is a lambda expression th...read more

Scope in C++ refers to the region of the program where a variable can be accessed.

• Variables declared inside a function have local scope and can only be accessed within that function.

• Variables declared outside of any function have global scope and can be accessed throughout the program.

• Variables declared within a block have block scope and can only be accessed within that block.

• C++ also supports namespace scope, which allows variables to be grouped together under a common name...read more

Modifiers are used in medical coding to provide additional information about a procedure or service.

• Modifiers are two-digit codes that are added to a CPT code to indicate that a service or procedure has been altered in some way

• Modifiers can affect reimbursement, indicate multiple procedures, provide more specific information, etc.

• For example, modifier -59 is used to indicate a distinct procedural service that is separate from other services performed on the same day

• Another ex...read more

Go is simpler, more efficient, and easier to learn compared to C++.

• Go has a simpler syntax and is easier to read and write compared to C++.

• Go has built-in concurrency support with goroutines and channels, making it easier to write concurrent programs.

• Go has a garbage collector, which simplifies memory management compared to manual memory management in C++.

• Go compiles faster than C++ due to its simpler type system and lack of header files.

• C++ has more features and is more powe...read more

Implement a coding exercise in the desired language

• Understand the requirements of the coding exercise

• Write clean and efficient code in the desired language

• Test the code with different inputs to ensure correctness

The 'this' keyword in JavaScript refers to the current object or context.

• Used to refer to the current object within a method

• Helps avoid naming conflicts with global variables

• Can be used to call another method within the same object

C is a procedural programming language while C++ is an object-oriented programming language.

• C is a low-level language while C++ is a high-level language.

• C++ supports object-oriented programming concepts like classes, inheritance, and polymorphism.

• C++ has better support for exception handling and templates.

• C++ is more complex than C and requires more memory.

• C++ is used for developing applications like video games, while C is used for developing operating systems and system sof...read more

C++ is a compiled language with pointers and memory management, while Java is an interpreted language with garbage collection.

• C++ is faster than Java due to direct memory access and lack of garbage collection

• Java is more secure than C++ due to its sandbox environment

• C++ allows for low-level system programming, while Java is better suited for web applications

• C++ has multiple inheritance, while Java only has single inheritance

• C++ has operator overloading, while Java does not

C++ and Java are programming languages used for software development.

• C++ is a high-performance language used for system programming, game development, and other performance-critical applications.

• Java is an object-oriented language used for developing web applications, mobile apps, and enterprise software.

• C++ is compiled, while Java is both compiled and interpreted.

• C++ allows for direct memory manipulation, while Java has automatic memory management.

• C++ is known for its speed ...read more

In C++, the types of data include fundamental types (int, float, etc.), derived types (arrays, pointers, etc.), and user-defined types.

• Fundamental types include int, float, double, char, etc.

• Derived types include arrays, pointers, references, etc.

• User-defined types are created by the programmer using classes or structures.

Python is an interpreted, high-level, general-purpose programming language while C++ is a compiled, high-performance language.

• Python is dynamically typed while C++ is statically typed

• Python has automatic memory management while C++ requires manual memory management

• Python is easier to learn and write code in while C++ is more complex and requires more expertise

• Python is better suited for scripting and rapid prototyping while C++ is better for performance-critical applications

• P...read more

Yes, a method with the virtual keyword can be extended.

• A virtual method can be overridden in a derived class.

• The derived class must also use the virtual keyword to override the method.

• The base class method can still be called using the base keyword.

To declare a file in software development, you typically need to specify the file type, name, and location.

• Use a file declaration statement in the programming language you are using (e.g. 'File myFile = new File("example.txt");' in Java)

• Specify the file type if necessary (e.g. '.txt' for text files, '.csv' for CSV files)

• Provide the file name and location within the declaration statement (e.g. 'example.txt' or 'C:/Users/User/Documents/example.txt')

Data structures in C++ are used to store and organize data efficiently.

• Data structures like arrays, linked lists, stacks, queues, trees, and graphs are commonly used in C++ programming.

• Arrays are used to store a collection of elements of the same data type.

• Linked lists are used to store elements in a linear order.

• Stacks follow the Last In First Out (LIFO) principle.

• Queues follow the First In First Out (FIFO) principle.

• Trees are hierarchical data structures with a root node an...read more

Design patterns in C++ are reusable solutions to common problems in software design.

• Design patterns help in creating flexible, maintainable, and scalable code.

• Examples of design patterns in C++ include Singleton, Factory, Observer, and Strategy.

• Each design pattern has a specific purpose and can be applied in different scenarios.

• Understanding design patterns can improve code quality and efficiency in software development.

Codes are used in various fields for identification, classification, and communication purposes.

• Codes are used in computer programming to identify specific functions or variables.

• In the medical field, codes such as ICD-10 are used for diagnosis and billing purposes.

• Barcodes and QR codes are used for product identification and tracking.

• Country codes are used for international calling and shipping.

• Postal codes are used for mail delivery and sorting.

C is a procedural programming language while C++ is an extension of C with added features of object-oriented programming.

• C is a procedural language, meaning it follows a step-by-step approach to solve a problem.

• C++ is an extension of C and supports both procedural and object-oriented programming paradigms.

• C++ introduces classes, objects, inheritance, and polymorphism, which are not present in C.

• C++ has additional features like exception handling, templates, and namespaces.

• C++...read more

Yes, I can do coding in both C++ and Java.

• I have experience in writing code in C++ and Java.

• I am familiar with the syntax and features of both languages.

• I have worked on projects using C++ and Java.

• I can provide examples of my coding work in both languages if needed.

When volatile and const are used together, the variable is treated as read-only and its value can change unexpectedly.

• The const keyword indicates that the variable's value cannot be changed by the program.

• The volatile keyword tells the compiler that the variable's value may change at any time, even if it doesn't appear to be modified by the program.

• When used together, the variable is treated as read-only by the program, but its value can still change unexpectedly due to exter...read more

Different data types in C include int, float, char, double, and void.

• int - used for integer values (e.g. int num = 10;)

• float - used for floating-point values (e.g. float num = 3.14;)

• char - used for single characters (e.g. char letter = 'A';)

• double - used for double-precision floating-point values (e.g. double num = 3.14159;)

• void - used to specify that a function does not return a value (e.g. void functionName();)

I am more comfortable with C++ due to its performance and control over hardware, but I also have experience with Python for its simplicity and ease of use.

• I have extensive experience with C++ in robotics programming, as it allows for low-level control and optimization.

• I also have proficiency in Python for rapid prototyping and scripting tasks in robotics projects.

• I am comfortable switching between C++ and Python depending on the requirements of the project.

File handling refers to the process of managing and manipulating files on a computer system.

• File handling involves tasks such as creating, reading, writing, updating, and deleting files.

• Common file operations include opening a file, reading its contents, writing data to it, and closing the file.

• File handling in programming languages often involves using functions or libraries specifically designed for file operations.

• Examples of file handling functions include fopen(), fread(...read more

Data structures in C++ are used to organize and store data efficiently.

• C++ provides various built-in data structures like arrays, linked lists, stacks, queues, trees, and graphs.

• Data structures help in performing operations like searching, sorting, and inserting data efficiently.

• Choosing the right data structure is important for optimizing the performance of a program.

• C++ also allows creating custom data structures using classes and templates.

Proficient in programming languages such as Java, Python, and C++. Familiar with database management and web development.

• Java

• Python

• C++

• Database management

• Web development

C is a procedural language while C++ is an object-oriented language.

• C does not support classes and objects while C++ does.

• C++ supports function overloading while C does not.

• C++ has a built-in exception handling mechanism while C does not.

• C++ supports namespaces while C does not.

• C++ supports references while C does not.

It is not possible to directly use C++ methods in a Java application.

• C++ and Java are different programming languages with different syntax and runtime environments.

• To use C++ methods in a Java application, you would need to create a bridge between the two languages.

• One approach is to use Java Native Interface (JNI) to call C++ code from Java.

• Another approach is to use a language interoperability framework like SWIG or JNA.

• You can also consider rewriting the C++ code in Java ...read more

Modifiers are codes used in medical billing to provide additional information about a service or procedure.

• Modifiers are two-digit codes appended to a CPT or HCPCS code to indicate that a service or procedure has been altered in some way

• Modifiers can affect reimbursement rates, indicate that multiple procedures were performed, or provide more specific information about the service

• For example, modifier -59 is used to indicate a distinct procedural service

C++ is a statically typed language with high performance, while Python is dynamically typed with simpler syntax.

• C++ is statically typed, while Python is dynamically typed

• C++ is compiled, while Python is interpreted

• C++ is better for performance-critical applications, while Python is better for rapid development

• C++ requires explicit memory management, while Python has automatic memory management

• C++ is used for system programming, game development, etc., while Python is used for...read more

Program to calculate sum of series, manipulate string, and manipulate employees' table

• For calculating sum of series, use a loop to iterate through the given series and add each element to a running total

• For manipulating a string, use string manipulation functions like substring, replace, or concatenate to modify the given string

• For manipulating an employees' table in SQL, use SQL queries like UPDATE, INSERT, or DELETE to modify the table based on the given requirements

C++ is an extension of C with object-oriented programming features.

• C++ supports object-oriented programming while C does not.

• C++ has a richer set of libraries compared to C.

• C++ allows function overloading while C does not.

• C++ supports exception handling while C does not.

• C++ has a more complex syntax compared to C.

• C++ is backward compatible with C.

• C++ has a built-in string class while C does not.

C++ is a compiled language while Java is an interpreted language.

• C++ is faster and more efficient than Java.

• Java is platform-independent while C++ is platform-dependent.

• C++ allows for manual memory management while Java has automatic garbage collection.

• Java has built-in support for multithreading while C++ requires external libraries.

• C++ is commonly used for system-level programming while Java is used for web and mobile applications.

Using classes in programming allows for better organization, encapsulation, and reusability of code.

• Classes help organize code by grouping related data and functions together

• Encapsulation allows for data hiding and protection, preventing direct access to data from outside the class

• Classes promote code reusability through inheritance and polymorphism

Python is a high-level, interpreted language known for its simplicity and readability, while C++ is a low-level, compiled language known for its performance and efficiency.

• Python is dynamically typed, while C++ is statically typed.

• Python uses indentation for code blocks, while C++ uses curly braces.

• Python has automatic memory management, while C++ requires manual memory management.

• Python is often used for web development and data analysis, while C++ is commonly used for syste...read more

I have worked with a variety of technologies including project management software, communication tools, and data analysis platforms.

• Experience with project management software such as Asana and Trello

• Proficient in communication tools like Slack and Microsoft Teams

• Familiarity with data analysis platforms like Tableau and Excel

C is preferred over C++ for certain applications due to its simplicity and efficiency.

• C is a simpler language compared to C++ and has a smaller runtime footprint.

• C is often used for low-level programming, embedded systems, and operating systems.

• C allows for more control over memory management and can be faster in certain scenarios.

• C++ introduces additional features like object-oriented programming and templates, which may not be necessary for all projects.

C is a procedural language while Java is an object-oriented language.

• C is compiled while Java is interpreted

• C has pointers while Java does not

• Java has automatic garbage collection while C does not

• Java is platform-independent while C is not

• C is used for system programming while Java is used for web and mobile applications

The 'out' keyword is used in C# to pass arguments by reference, allowing the method to modify the value of the argument.

• Used to pass arguments by reference in C#

• Allows the method to modify the value of the argument

• Must be assigned a value inside the method before returning

Python is a high-level, interpreted language known for its simplicity and readability, while C++ is a low-level, compiled language known for its performance and efficiency.

• Python is dynamically typed, while C++ is statically typed.

• Python uses indentation for code blocks, while C++ uses curly braces.

• Python has automatic memory management, while C++ requires manual memory management.

• Python is often used for web development and data analysis, while C++ is commonly used for syste...read more

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for function overloading and templates.

• C++ has a standard library that includes many useful functions.

• C++ allows for both procedural and object-oriented programming.

• C++ is generally considered to be more complex than C.

C++ is a compiled language while Java is an interpreted language.

• C++ is faster than Java due to its compilation process.

• Java has automatic garbage collection while C++ requires manual memory management.

• C++ supports multiple inheritance while Java only supports single inheritance.

• Java has a built-in exception handling mechanism while C++ requires manual exception handling.

• C++ allows for pointer arithmetic while Java does not.

• Java has a larger standard library than C++.

• C++ is o...read more

I primarily use C++17, but I am familiar with earlier versions as well.

• I am comfortable working with features introduced in C++17 such as structured bindings and constexpr if

• I have experience with earlier versions like C++11 and C++14

• I stay updated with the latest features and improvements in C++ standards

C++ is a statically typed language with a focus on performance and low-level memory manipulation, while Python is dynamically typed and emphasizes readability and simplicity.

• C++ is statically typed, meaning variable types must be declared at compile time, while Python is dynamically typed, allowing for more flexibility.

• C++ is compiled directly into machine code, resulting in faster performance, while Python is interpreted at runtime, making it slower but easier to write and r...read more

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for function overloading and templates.

• C++ has a more complex syntax compared to C.

• C++ has a standard library that includes many useful functions.

• C++ is generally considered to be a more powerful language than C.

Java is advantageous than C++ due to its platform independence and automatic memory management.

• Java is platform independent while C++ is platform dependent

• Java has automatic memory management while C++ requires manual memory management

• Java has a simpler syntax compared to C++

• Java has a larger standard library compared to C++

• Java has better support for multithreading compared to C++

readonly keyword is used in C# to declare that a field can only be assigned a value during initialization or in a constructor.

• readonly keyword can only be used on fields, not properties.

• The value of a readonly field can only be changed in the constructor of the class.

• Using readonly fields can help ensure that certain values remain constant throughout the lifetime of an object.

Python is easier to learn, has simpler syntax, and is more versatile than C++.

• Python has a simpler syntax and is easier to read and write than C++.

• Python is an interpreted language, which means it doesn't need to be compiled before running.

• Python has a vast library of modules and packages that can be easily imported and used.

• Python is more versatile than C++ and can be used for a wide range of applications, including web development, data analysis, and artificial intelligence...read more

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for polymorphism and inheritance.

• C++ has a standard template library (STL) for data structures and algorithms.

• C++ allows function overloading while C does not.

• C++ has exception handling while C does not.

Java is platform-independent, object-oriented, and uses automatic memory management, while C++ is platform-dependent, supports multiple paradigms, and requires manual memory management.

• Java is platform-independent, while C++ is platform-dependent.

• Java is object-oriented, while C++ supports multiple paradigms.

• Java uses automatic memory management (garbage collection), while C++ requires manual memory management.

• Java has a simpler syntax compared to C++.

• Java has a larger standa...read more

The inline keyword is used in Kotlin to suggest that a function should be inlined at the call site.

• Used to eliminate the overhead of function calls by copying the function code directly at the call site

• Helps in improving performance by reducing the function call overhead

• Should be used for small functions or lambdas to avoid unnecessary function call overhead

C++ is better than C due to its object-oriented programming features and better memory management.

• C++ supports object-oriented programming while C does not.

• C++ has better memory management with features like constructors and destructors.

• C++ has more advanced features like templates and exceptions.

• C++ is more versatile and can be used for both low-level system programming and high-level application development.

• C++ has a larger standard library compared to C.

• C++ allows for func...read more

Java is a high-level, object-oriented programming language with automatic memory management, while C++ is a low-level, object-oriented programming language with manual memory management.

• Java is platform-independent, while C++ is platform-dependent.

• Java uses automatic garbage collection, while C++ requires manual memory management.

• Java has a simpler syntax compared to C++.

• Java does not support pointers, while C++ does.

• Java is interpreted and compiled at runtime, while C++ is c...read more

C is a procedural programming language, while C++ is an object-oriented programming language that is an extension of C.

• C is a procedural programming language, focusing on functions and procedures.

• C++ is an object-oriented programming language, allowing for classes, objects, and inheritance.

• C++ is an extension of C, adding features like classes, templates, and exception handling.

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for function overloading and templates.

• C++ has a standard library that includes many useful functions.

• C++ is more complex than C and can be harder to learn.

• C++ code can be compiled as C code with some modifications.

Java is preferred for its platform independence, strong community support, and ease of use compared to C++.

• Java is platform independent, meaning code written in Java can run on any device with a Java Virtual Machine (JVM). C++, on the other hand, is platform dependent.

• Java has a larger and more active community compared to C++, providing developers with more resources, libraries, and support.

• Java is considered easier to learn and use compared to C++, making it a more beginner...read more

Macros are automated scripts that can be used to perform repetitive tasks in Servicenow.

• Macros in Servicenow are used to automate tasks and reduce manual effort.

• They can be used to update multiple records at once, send notifications, or perform calculations.

• Macros can be triggered manually or automatically based on certain conditions.

• Example: Creating a macro to automatically close all resolved incidents in Servicenow.

C++ is an extension of C with added features like object-oriented programming, templates, and exception handling.

• C++ supports object-oriented programming while C does not.

• C++ has templates for generic programming while C does not.

• C++ has exception handling while C does not.

• C++ has a standard library that includes the C standard library.

• C++ allows function overloading while C does not.

Both Java and C++ have their own strengths and weaknesses, it depends on the specific requirements of the project.

• Java is platform-independent, making it suitable for web applications and mobile development.

• C++ is faster and more efficient, making it a better choice for system-level programming and game development.

• Java has automatic memory management through garbage collection, while C++ requires manual memory management.

• C++ allows for low-level manipulation of hardware, whi...read more

Private constructors are used to prevent instantiation of a class from outside the class itself.

• Private constructors are used in classes that should not be instantiated directly by external code.

• They are often used in classes that contain only static methods or properties.

• Private constructors can also be used in singleton design pattern to ensure only one instance of a class is created.

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has constructors and destructors while C does not.

• C++ supports function overloading while C does not.

• C++ has namespaces while C does not.

• C++ supports exception handling while C does not.

Java is a high-level, object-oriented programming language with automatic memory management, while C++ is a lower-level, multi-paradigm language with manual memory management.

• Java is platform-independent, while C++ is platform-dependent.

• Java uses automatic garbage collection, while C++ requires manual memory management.

• Java is more suited for web applications and enterprise software, while C++ is often used for system programming and game development.

C+ and C++ are programming languages used for system and application development, while Java is a high-level programming language known for its portability and versatility.

• C+ and C++ are low-level programming languages used for system programming and application development.

• C++ is an extension of the C programming language with added features like classes and objects.

• Java is a high-level programming language known for its portability and versatility, often used for web develo...read more

C and C++ are programming languages used for system programming and application development.

• C is a procedural programming language developed by Dennis Ritchie in 1972.

• C++ is an object-oriented programming language developed by Bjarne Stroustrup in 1983.

• C is used for system programming, embedded systems, and operating systems.

• C++ is used for application development, game development, and system programming.

• C++ is an extension of C with additional features like classes, inherit...read more

C++ is a statically typed language with a focus on performance and low-level programming, while Java is a high-level, object-oriented language with automatic memory management.

• C++ is closer to the hardware and allows for more control over memory management.

• Java is platform-independent due to its bytecode compilation and virtual machine execution.

• C++ supports multiple inheritance, while Java only supports single inheritance.

• Java has built-in garbage collection, while C++ requi...read more

Enum class is a strongly-typed class that defines a set of named constants.

• Enum class is introduced in C++11 to provide type-safe enums.

• It allows defining a set of named constants that can be used as values.

• Each constant in an enum class is treated as a separate type, preventing type mismatches.

• Example: enum class Color { RED, GREEN, BLUE };

• Example: Color c = Color::RED;

C and C++ are programming languages used for system and application software development.

• C is a procedural programming language developed by Dennis Ritchie in 1972.

• C++ is an object-oriented programming language developed by Bjarne Stroustrup in 1983.

• C is used for developing system software, device drivers, and embedded systems.

• C++ is used for developing application software, games, and operating systems.

• C++ is an extension of C with additional features like classes, inheritan...read more

Java is a high-level, object-oriented programming language, while C++ is a general-purpose, object-oriented programming language with low-level features.

• Java is platform-independent, while C++ is platform-dependent.

• Java uses automatic garbage collection, while C++ requires manual memory management.

• Java does not support multiple inheritance, while C++ does.

• Java has a simpler syntax compared to C++.

• Example: Java uses 'public static void main(String[] args)' for the main method,...read more

C++ is a powerful programming language known for its efficiency and flexibility.

• C++ is a statically typed language

• It supports object-oriented programming

• It allows for low-level memory manipulation

• Example: defining a class in C++ - class Car { public: int speed; };

C is a procedural programming language while C++ is an extension of C with object-oriented programming features.

• C is a procedural language while C++ supports both procedural and object-oriented programming.

• C does not have built-in support for classes and objects, while C++ does.

• C++ supports features like inheritance, polymorphism, and encapsulation which are not available in C.

• C++ has a standard template library (STL) which provides useful data structures and algorithms.

• C++ a...read more