Class XII
Computer Science (083)
Sample Question Paper 2018-19
Time allowed: 3 Hours Max. Marks: 70
General Instructions:
(a) All questions are compulsory.
(b) Programming Language with C++
(c) In Question 2(b, d) ,3 and 4 has internal choices.
Q. No. Part Question Description Marks
1 (a) Write the type of C++ Operators (Arithmetic, Logical, and Relational (2)
Operators) from thefollowing:
(i) !(ii) !=(iii) &&(iv) %
(b) Observe the following program very carefully and write the name of those (1)
header file(s), which are essentially needed to compile and execute
thefollowing program successfully:
void main()
{
char text[20], newText[20];
gets(text);
strcpy(newText,text);
for(int i=0;i<strlen(text);i++)
if(text[i] = =’A’)
text[i] = text[i]+2;
puts(text);
}
(c) Rewrite the following C++ code after removing any/all Syntactical Error(s) (2)
with each correction underlined.
Note: Assume all required header files are already being included in the
program.
#define float PI 3.14
void main( )
{
float R=4.5,H=1.5;
A=2*PI*R*H + 2*PIpow(R,2);
cout<<‘Area=’<<A<<endl;
}
1
, (d) Find and write the output of the following C++ program code: (3)
Note: Assume all required header files are already being included in
the program.
void main( )
{
int Ar[ ] = { 6 , 3 , 8 , 10 , 4 , 6 , 7} ;
int *Ptr = Ar , I ;
cout<<++*Ptr++ << '@' ;
I = Ar[3] - Ar[2] ;
cout<<++*(Ptr+I)<<'@'<<"\n" ;
cout<<++I + *Ptr++ << '@' ;
cout<<*Ptr++ <<'@'<< '\n' ;
for( ; I >=0 ; I -=2)
cout<<Ar[I] << '@' ;
}
(e) Find and write the output of the following C++ program code: (2)
typedef char STRING[80];
void MIXNOW(STRING S)
{
int Size=strlen(S);
for(int I=0;I<Size;I+=2)
{
char WS=S[I];
S[I]=S[I+1];
S[I+1]=WS;
}
for (I=1;I<Size;I+=2)
if (S[I]>=’M’ && S[I]<=’U’)
S[I]=’@’;
}
void main()
{
STRING Word=”CBSEEXAM2019”;
MIXNOW(Word);
cout<<Word<<endl;
}
(f) Observe the following program and find out, which output(s) out of (i) to (2)
(iv) willbe expected from the program? What will be the minimum and the
maximum value assigned to the variable Alter?
Note: Assume all required header files are already being included in the
program.
void main( )
{
randomize();
int Ar[]={10,7}, N;
2
Computer Science (083)
Sample Question Paper 2018-19
Time allowed: 3 Hours Max. Marks: 70
General Instructions:
(a) All questions are compulsory.
(b) Programming Language with C++
(c) In Question 2(b, d) ,3 and 4 has internal choices.
Q. No. Part Question Description Marks
1 (a) Write the type of C++ Operators (Arithmetic, Logical, and Relational (2)
Operators) from thefollowing:
(i) !(ii) !=(iii) &&(iv) %
(b) Observe the following program very carefully and write the name of those (1)
header file(s), which are essentially needed to compile and execute
thefollowing program successfully:
void main()
{
char text[20], newText[20];
gets(text);
strcpy(newText,text);
for(int i=0;i<strlen(text);i++)
if(text[i] = =’A’)
text[i] = text[i]+2;
puts(text);
}
(c) Rewrite the following C++ code after removing any/all Syntactical Error(s) (2)
with each correction underlined.
Note: Assume all required header files are already being included in the
program.
#define float PI 3.14
void main( )
{
float R=4.5,H=1.5;
A=2*PI*R*H + 2*PIpow(R,2);
cout<<‘Area=’<<A<<endl;
}
1
, (d) Find and write the output of the following C++ program code: (3)
Note: Assume all required header files are already being included in
the program.
void main( )
{
int Ar[ ] = { 6 , 3 , 8 , 10 , 4 , 6 , 7} ;
int *Ptr = Ar , I ;
cout<<++*Ptr++ << '@' ;
I = Ar[3] - Ar[2] ;
cout<<++*(Ptr+I)<<'@'<<"\n" ;
cout<<++I + *Ptr++ << '@' ;
cout<<*Ptr++ <<'@'<< '\n' ;
for( ; I >=0 ; I -=2)
cout<<Ar[I] << '@' ;
}
(e) Find and write the output of the following C++ program code: (2)
typedef char STRING[80];
void MIXNOW(STRING S)
{
int Size=strlen(S);
for(int I=0;I<Size;I+=2)
{
char WS=S[I];
S[I]=S[I+1];
S[I+1]=WS;
}
for (I=1;I<Size;I+=2)
if (S[I]>=’M’ && S[I]<=’U’)
S[I]=’@’;
}
void main()
{
STRING Word=”CBSEEXAM2019”;
MIXNOW(Word);
cout<<Word<<endl;
}
(f) Observe the following program and find out, which output(s) out of (i) to (2)
(iv) willbe expected from the program? What will be the minimum and the
maximum value assigned to the variable Alter?
Note: Assume all required header files are already being included in the
program.
void main( )
{
randomize();
int Ar[]={10,7}, N;
2
