DRE-Trainee

#include

using namespace std;

class Base

{

public:

    virtual void display()

{

        cout << “Base Display” << endl;

    }

};

class Derived : public Base

{

public:

    void display() override

{

        cout << “Derived Display” << endl;

    }

};

int main() {

   Base *ptr = new Derived();

   ptr->display();

   return 0;

}

A) Base Display

B) Derived Display

C) Compilation Error

D) Undefined Behaviour

Answer: B) Derived Display

#include

using namespace std;

class A {

public:

   virtual void show() {

       cout << “Class A” << endl;

   }

};

class B : public A {

public:

   void show() {

       cout << “Class B” << endl;

   }

};

int main() {

   A *ptr = new B();

   ptr->show();

   return 0;

}

A) Class A

B) Class B

C) Compilation Error

D) Undefined Behaviour

Answer: B) Class B

You see a table around you. Tell me the components involved in making this table.

You have been given a 2-D array 'mat' of size 'M x N' where 'M' and 'N' denote the number of rows and columns, respectively. The elements of each row are sorted in non-decreasing order.

Moreover, the first element of a row is greater than the last element of the previous row (if it exists).

You are given an integer ‘target’, and your task is to find if it exists in the given 'mat' or not.

Example:

Input: ‘M’ = 3, 'N' = 4, ‘mat’ = [[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12]], ‘target’ = 8

Output: true

Explanation: The output should be true as '8' exists in the matrix.

Draw the OOP design for a Music Player System on the whiteboard and explain it.

C#.NET Windows Forms Coding Test: There were 10 to 12 questions where I had to modify things like color, time logic, and functionality of a Windows Forms TO-DO List application.