General interview questions on c++

• What is the full form of OOPS?
• What is a class?
• What is an object?
• List the types of inheritance supported in C++.
• What is the role of protected access specifier?
• What is encapsulation?
• What is abstraction?
• What is inheritance?
• Explain the purpose of the keyword volatile.
• What is an inline function?
• What is a storage class?
• Mention the storage classes names in C++.
• What is the role of mutable storage class specifier?
• Distinguish between shallow copy and deep copy.
• What is a pure virtual function?
• What is an abstract class in C++?
• What is a reference variable in C++?
• What is role of static keyword on class member variable?
• Explain the static member function.
• Name the data type which can be used to store wide characters in C++.
• What are/is the operator/operators used to access the class members?
• Can we initialize a class/structure member variable as soon as the same is defined?
• What is the data type to store the Boolean value?
• What is function overloading?
• What is operator overloading?
• Do we have a String primitive data type in C++?
• Name the default standard streams in C++.
• Which access specifier/s can help to achive data hiding in C++?
• When a class member is defined outside the class, which operator can be used to associate the function definition to a particular class?
• What is a destructor? Can it be overloaded?
• What is a constructor?
• What is a default constructor? Can we provide one for our class?
• Which operator can be used in C++ to allocate dynamic memory?
• What is the purpose of ‘delete’ operator?
• Can I use malloc() function of C language to allocate dynamic memory in C++?
• Can I use ‘delete’ operator to release the memory which was allocated using malloc() function of C language?
• What is a friend function?
• What is a copy constructor?
• Does C++ supports exception handling? If so what are the keywords involved in achieving the same.
• Explain the pointer – this.
• What is the difference between the keywords struct and class in C++?
• Can we implement all the concepts of OOPS using the keyword struct?
• What is the block scope variable in C++?
• What is the role of the file opening mode ios::trunk?
• What is the scope resolution operator?
• What is a namespace?
• What are command line arguments?
• What is a class template?
• How can we catch all kind of exceptions in a single catch block?
• What is keyword auto for?
• What is a static variable?
• What is the purpose of extern storage specifier.
• What is the meaning of base address of the array?
• When should we use the register storage specifier?
• Can a program be compiled without main() function?
• Where an automatic variable is stored?
• What is a container class?
• What is a token?
• What is a preprocessor?
• What are command line arguments?
• What are the different ways of passing parameters to the functions? Which to use when?
• What is reminder for 5.0 % 2?
• Which compiler switch to be used for compiling the programs using math library with g++ compiler?
• Can we resize the allocated memory which was allocated using ‘new’ operator?
• Who designed C++ programming language?
• Which operator can be used to determine the size of a data type/class or variable/object?
• How can we refer to the global variable if the local and the global variable names are same?
• What are valid operations on pointers?
• What is recursion?
• What is the first string in the argument vector w.r.t command line arguments?
• What is the maximum length of an identifier?
• What is the default function call method?
• What are available mode of inheritance to inherit one class from another?
• What is the difference between delete and delete[]?
• Does an abstract class in C++ need to hold all pure virtual functions?
• Is it legal to assign a base class object to a derived class pointer?
• What happens if an exception is thrown outside a try block?
• Are the exceptions and error same?
• What is function overriding?
• Which function is used to move the stream pointer for the purpose of reading data from stream?
• Which function is used to move the stream pointer for the purpose of writing data from stream?
• Are class functions taken into consideration as part of the object size?
• Can we create and empty class? If so what would be the size of such object.
• What is ‘std’?
• What is the full form of STL?
• What is ‘cout’?
• What is ‘cin’?
• What is the use of the keyword ‘using’?
• If a pointer declared for a class, which operator can be used to access its class members?
• What is difference between including the header file with-in angular braces < > and double quotes “ “
• S++ or S=S+1, which can be recommended to increment the value by 1 and why?
• What is the difference between actual and formal parameters?
• What is the difference between variable declaration and variable definition?
• Which key word is used to perform unconditional branching?
• Is 068 a valid octal number?
• What is the purpose of #undef preprocessor?
• Can we nest multi line comments in a C++ code?
• What is a virtual destructor?
• What is the order of objects destroyed in the memory?
• What is a friend class?