Science (English Medium) इयत्ता १२ - CBSE Important Questions for Computer Science (C++)

Classify the following Web Scripting as Client-Side Scripting and Server Side Scripting

Java Scripting

Classify the following Web Scripting as Client-Side Scripting and Server Side Scripting

ASP

Classify the following Web Scripting as Client-Side Scripting and Server Side Scripting

VB Scripting

Classify the following Web Scripting as Client-Side Scripting and Server Side Scripting

JSP

Differentiate between communication using Optical Fiber and Ethernet Cable in context of the wired medium of communication technologies.

Janish Khanna used a pen drive to copy files from his friend's laptop to his office computer. Soon his computer started abnormal functioning. Sometimes it would restart by itself and sometimes it would stop different applications running on it. Which of the following options out ·of (i) to (iv), would have caused the malfunctioning of the computer? Justify the reason for your chosen option:

1) Computer Virus

2)Spain Mail

3) Computer Bacteria

4) Trojan Horse

Ms Raveena Sen is an IT expert and a freelancer. She recently used her skills to access the Admin password for the network server of Super Dooper Technology Ltd. and provided confidential data of the organization to its CEO, informing him about the vulnerability of their network security. Out of the following options (i) to (iv), which one most appropriately defines Ms Sen?

Justify the reason for your chosen option :
1) Hacker

2) Cracker

3) Operator

4) Network Admin

Hi-Standard Tech Traj.ning Ltd. is a Mumbai based organization which is expanding its office set-up to Chennai. At Chennai office compound, they are planning to have 3 different blocks for Admin, Training and Accounts related activities. Each block has a number of computers, which are required to be connected in a network for communication, data and resource sharing.

As a network consultant, you have to suggest the best network related solutions for them for issues/problems raised by them in (i) to (iv), as per the distances between various blocks/locations and other given parameters.

Shortest differences between various blocks/locations:

The number of computers installed at various blocks is as follows:

1) Suggest the most appropriate block/location to house the SERVER in the CHENNAI office (out of the 3 blocks) to get the best and effective connectivity. Justify your answer.

2) Suggest the best-wired medium and draw the cable layout (Block to Block) to efficiently connect various blocks within the CHENNAI office compound.

3) Suggest a device/software and its placement that would provide data security for the entire network of the CHENNAI office.

4) Suggest a device and the protocol that shall be needed to provide wireless Internet access to all smartphone/laptop users in the CHENNAI office

Differentiate between packet switching over message switching

What is Trojan Horse?

Out of the following, which all comes under cyber crime ?

1) Stealing away a brand new hard disk from a showroom

2) Getting in someone's social networking account without his consent and posting on his behalf

3) Secretly copying data from server of an organization and selling it to the other organization.

4) Looking at online activities of a friends blog.

Write the type of C++ token (keywords) and the User-defined identifier from the following.

1) else

2) Long

3) 4Queue

4) _count

The following C++ code during compilation reports errors as follows:

Error: 'ofstream' not declared

Error: 'strupr' not declared

Error: 'strcat' not declared

Error: 'FIN' not declared

Write the names of the correct header files, which must be included  to compile the code successfully

void main()
{
   of stream FIN ("WISH. TXT") ;
   char TEXT2[]="good day";
   char TEXTl []="John! ";
   
   strupr(TEXT2);
   strcat(TEXTl , TEXT2);
   FIN<<TEXTl<

Rewrite the following C++ code after removing any/all syntactical error with each correction underline

Note: Assume all required header files are already included in the program.

Typedef Count(int);
void main()
(
    Count C;
    cout<<"Enter the count:";
    cin>>C;
    for (K = 1 ; K<=C;K++)
        cout<< C "*" K <<end1;
}

Find and write the output of the following C++ program code:

Note: Assume all required header files are already included in the program

void Revert(int &Num, int Last=2)
{
   Last =(Last%2==0)?Last+l: Last - l;
   for(int C=l; C <= Last; C++)
      Num+=C;
)

void main()
{
    int A=20, B=4;
    Revert(A, B) ;
    cout<<A<<"&"<<B<<end1;
    B--;
    Revert{A,B);
    cout<<A<<"#"<<B<<endl;
    Revert{B);
    cout<<A<<"#"<<B<<endl;
}

Look at the following C++ code and find the possible output from the options (i) to (iv) following it. Also, write the highest and lowest values that can be assigned to the array A.

Note:

• Assume all the required header files are already being included in the code
• The function random(n) generates an integer between 0 and -1

void main()
{
   randomize();
   int A(4], C;
   for(C=0; C<4; C++)
      A(C] = random(C+l) + 10;
   for (C=3; C >= 0; c--)
       cout<<A(C]<<"@";
}

1) 13@10@11@10@

2) 15$14$12$10$

3) 12@11@13@10@

4) 12@11@10@10@

Which function(s) out of the following can be considered as an overloaded function(s) in the same program? Also, write the reason for not considering the other(s) as an overloaded function(s)

void Execute(char A,int B);    // Function 1

void Execute(int A,char B);    // Function 2

void Execute(int P=10) ;       // Function 3

void Execute();                    // Function 4

int Execute(int A);               // Function 5

void Execute(int &K);          // Function 6

Observe the following C++ code and answer the questions (i) and (ii).

Note: Assume all necessary files are included.

class FIRST
{
   int Numl;
public:
    void Display()
    {
        cout<<Numl<<endl;            //Member Function 1
    }
};

class SECOND: public FIRST
{
    int Num2;
public:
     void Display()                //Member Function 2
     {
         cout<<Num2<<endl;
     }
};

Void main()
{
   SECOND S;
   ___________                    // Statement 1
   ___________                    // Statement 2
  
}

1) Which Objected Programming features is illustrated by the definition of classes FIRST and SECOND?

2) Write Statement 1 and Statement 2 to execute Member Function 1 and Member Function 2 respectively using the object S

Write the definition of a class CONTAINER in C++ with the following description.

Private Members

-Radius, Height      // float

- Type                  // int (1 for Cone, 2 for Cylinder)

- Volume              // float

- CalVolume()       // Member function to calculate

                          // volume as per the Type

Public Members

- GetValues ()    //A function to allow a user to enter of Radius, Height and Type. Also, call function CalVolume() from it.

- ShowAll ()      // A function to display Radius, Height, Type and Volume of Container

Answer the question (i)  to (iv) based on the following:

class Teacher
{
   int TCode;
protected:
      char Name[20];
public:
      Teacher();
      void Enter() ; void Show();
};

class Course
(
   int ID;
protected:
      Char Title[30];
public:
      Course();
      void Initiate();
      void Display();
};

class Schedule : public Course, private Teacher
{
    int DD, MM, YYYY;
public:
    Schedule();
    void Start();
    void View();
};

void main()
{
   Schedule S;
}

1) Which type of Inheritance out of the following is illustrated in the above example?

2) Write the name of all the member which are directly accessible by the member function View() of Class Schedule.

3) Write the names of all the members, which are directly accessible by the object S of Class Schedule declared in the main() function.

4) What will be the order of execution of the constructors, when the object S of the Class Schedule Schedule is declared inside the main() function?