Explore topic-wise InterviewSolutions in .

The objects are destroyed in the reverse order of their creation.

A virtual destructor ensures that the objects resources are released in the reverse order of the object being constructed w.r.t inherited object.

No, we cannot.

It will be used to undefine an existing macro definition.

No, it contains invalid octal digits.

S++, as it is single machine instruction (INC) internally.

If a header file is included with in < > then the compiler searches for the particular header file only with in the built in include path. If a header file is included with in “ “, then the compiler searches for the particular header file first in the current working directory, if not found then in the built in include path

Arrow (->) operator can be used for the same

It is used to specify the namespace being used in.

cin is the object of istream class. The stream ‘cin’ is by default connected to console input device.

cout is the object of ostream class. The stream ‘cout’ is by default connected to console output device.

Standard template library

Default namespace defined by C++.

We can create an empty class and the object size will be 1.

No, only the class member variables determines the size of the respective class object.

seekp()

seekg()

No, exceptions can be handled whereas program cannot resolve errors.

The program shall quit abruptly.

No, it will be error as the compiler fails to do conversion.

Not necessarily, a class having at least one pure virtual function is abstract class too.

Delete[] is used to release the array allocated memory which was allocated using new[] and delete is used to release one chunk of memory which was allocated using new.

Public, private & protected

By default the functions are called by value.

Ideally it is 32 characters and also implementation dependent.

Program name.

Function calling itself is called as recursion.

The only two permitted operations on pointers are

• Comparision ii) Addition/Substraction (excluding void pointers)

We can apply scope resolution operator (::) to the for the scope of global variable.

sizeof

Bjarne Stroustrup.

No, there is no such provision available.

Opiton –lm to be used as > g++ –lm <file.cpp>

Error, It is invalid that either of the operands for the modulus operator (%) is a real number.

• Call by value − We send only values to the function as parameters. We choose this if we do not want the actual parameters to be modified with formal parameters but just used.

• Call by address − We send address of the actual parameters instead of values. We choose this if we do want the actual parameters to be modified with formal parameters.

• Call by reference − The actual parameters are received with the C++ new reference variables as formal parameters. We choose this if we do want the actual parameters to be modified with formal parameters.

A class containing at least one member variable of another class type in it is called so.

Every local variable by default being an auto variable is stored in stack memory

Yes, it can be but cannot be executed, as the execution requires main() function definition.

The starting address of the array is called as the base address of the array.

Used to resolve the scope of global symbol

#include <iostream>using namespace std;main() {   extern int i;         cout<<i<<endl;}int i = 20;

A static local variables retains its value between the function call and the default value is 0. The following function will print 1 2 3 if called thrice.

void f() {    static int i;       ++i;    printf(“%d “,i); }

If a global variable is static then its visibility is limited to the same source code.

By default every local variable of the function is automatic (auto). In the below function both the variables ‘i’ and ‘j’ are automatic variables.

void f() {   int i;     auto int j;}

NOTE − A global variable can’t be an automatic variable.

The catch block with ellipses as follows

catch(…) {}

A template class is a generic class. The keyword template can be used to define a class template.

The arguments/parameters which are sent to the main() function while executing from the command line/console are called so. All the arguments sent are the strings only.

A namespace is the logical division of the code which can be used to resolve the name conflict of the identifiers by placing them under different name space.

If the file already exists, its content will be truncated before opening the file.

A variable whose scope is applicable only within a block is said so. Also a variable in C++ can be declared anywhere within the block.

Yes.

By default the members of struct are public and by default the members of the class are private.