Which of the following is true about the following program CPP #include <iostream> class Test { public: int i; void get(); }; void Test::get() { std::cout << "Enter the value of i: "; std::cin >> i; } Test t; // Global object int main() { Test t; // local object t.get(); std::cout << "value of i in local t: "<<t.i<<' '; ::t.get(); std::cout << "value of i in global t: "<<::t.i<<' '; return 0; }

Compiler Error: Cannot have two objects with same class name

Compiler Error in Line "::t.get();"

Classes & Objects

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Question 1

What will be the output?

C++

class Test {
    int x; 
};
int main()
{
  Test t;
  cout << t.x;
  return 0;
}

A
0
B
Garbage Value
C
Compiler Error
D
None of the Above

Question 2

What does the this pointer in C++ represent?

A
Pointer to class name
B
Pointer to current object
C
Pointer to base class
D
Pointer to constructor

Question 3

Assume that an integer and a pointer each takes 4 bytes. Also, assume that there is no alignment in objects. Predict the output following program.

CPP

#include
using namespace std;

class Test
{
    static int x;
    int *ptr;
    int y;
};

int main()
{
    Test t;
    cout << sizeof(t) << " ";
    cout << sizeof(Test *);
}

A
12 4
B
12 12
C
8 4
D
8 8

Question 4

Which of the following is true about the following program

CPP

#include 
class Test
{
public:
    int i;
    void get();
};
void Test::get()
{
    std::cout << "Enter the value of i: ";
    std::cin >> i;
}
Test t;  // Global object
int main()
{
    Test t;  // local object
    t.get();
    std::cout << "value of i in local t: "<<t.i<<'\n';
    ::t.get(); 
    std::cout << "value of i in global t: "<<::t.i<<'\n';
    return 0;
}

A
Compiler Error: Cannot have two objects with same class name
B
Compiler Error in Line "::t.get();"
C
Compiles and runs fine
D
Runtime Error

Question 5

What is the difference between struct and class in C++?

A
All members of a structure are public and structures don\'t have constructors and destructors
B
Members of a class are private by default and members of struct are public by default. When deriving a struct from a class/struct, default access-specifier for a base class/struct is public and when deriving a class, default access specifier is private.
C
All members of a structure are public and structures don\'t have virtual functions
D
All of the above

Question 6

What is the correct way to define a class in C++?

A
class MyClass { int x; void func(); }
B
class MyClass { public: int x; void func(); };
C
class MyClass { public: int x; void func(); }
D
class MyClass { public int x; void func(); };

Question 7

In C++, which operator is used to access a member function or variable from an object?

A
->
B
::
C
.
D
*

Question 8

Given the following class:

C++

class A {
  int x;
public:
  A(int v) { x = v; }
  int getX() { return x; }
};

What will A obj(5); cout << obj.getX(); print?

A
0
B
5
C
Compiler error
D
Garbage value

Tags:

C++

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