Most Expected Questions for Computer Science Class XII

Q 1. (a) What is the difference between automatic type conversion and type casting? Also, give a

suitable C++ code to illustrate both. 2

(b) Which C++ header file(s) will be essentially required to be included to run/

execute the following C++ code? 1 void main( ){

int Eno=123, char Ename[ ]=Rehan Swamp;

cout

}

void main ( )

{

POINT P1={15, 25, 5}, P2={10, 30, 20};

StepIn(P1);

StepOut(P2,4);

cout

for (int 1=1;I

e1se

ARR [L] *=L;

}

void Show (int ARR [ ], int Size)

{

for (int L=0; L

(i) 50 # 51 # 52 # 53 # 54 # 55 # (ii) 52 # 53 # 54 # 55

(iii) 53 # 54 # (iv) 51 # 52 # 53 # 54 # 55

Q 3. (a) What is the difference between call by reference and call by value with respect to memory allocation ? Give a suitable example to illustrate using C++ code. 2

(b) Observe the following C++ code and write the name(s) of the header file(s), which will be

essentially required to run it in a C++ compiler : 1 void main()

{

char CH,STR[20];

cin>>STR;

CH=toupper(STR[0]);

cout

(e) Obtain the output of the following C++ program, which will appear on the screen after its

execution. 3

Important Note :

All the desired header files are already included in the code, which are required to run the code. class Game

{

int Level, Score;

char Type;

public:

Game(char GType=P)

{Level=1;Score=0;Type=GType;}

void Play(int GS);

void Change();

void Show()

{

cout

(f) Read the following C++ code carefully and find out, which out of the given options (i) to (iv) are

the expected correct output(s) of it. Also, write the maximum and minimum value that can be

assigned to the variable Taker used in the code : 2 void main() {

int GuessMe[4]={100,50,200,20};

int Taker=random(2)+2;

for (int Chance=0;Chance

Important Note :- All the desired header files are already included in the code, which are required to

run the code. 2

void main ( )

{

char *String=SARGAM; int *Ptr, A[ ]={1,5,7,9};

Ptr=A;

cout < < *Ptr

void Player: :Start (int SC)

{

Score+=SC;

if (Score >= 100 )

Level=3;

else if (Score>=50 )

Level=2;

else

Level=1;

}

(f) Read the following C++ code carefully and find out, which out of the given options (i) to (iv) are

the expected correct output(s) of it. Also, write the maximum and minimum value that can be

assigned to the variable Start used in the code : 2

void main ( )

{

int Guess[4]={200,150,20 ,250};

int Start=random (2 ) +2;

for ( int C=Start ; C