Page 254 - C++

CBSE AISSCE 2016-2017 Marking Scheme for Computer Science
(Sub Code: 083 Paper Code 91/1 Delhi)

while(F.read((char*)&obj,
sizeof(obj)))
{
if(strcmp(obj.RDEPT(),“MATHS”)==0)
count++;
}
cout<<”Number of MATHS teachers :”<<count<<endl;
F.close(); ​//IGNORE
}
OR
Any other correct function definition

(½ Mark for opening TEACHERS.DAT correctly)
(½ Mark for reading records from TEACHERS.DAT)
(½ Mark for comparing DEPT of type MATHS(ignore case sensitive checking)
with strcmp or strcmpi)
(½ Mark for displaying the incremented count for matching records)

(c) Find the output of the following C++ code considering that the binary file 1
BOOK.DAT exists on the hard disk with a data of 200 books.

class BOOK
{
int BID;char BName[20];
public:
void Enter();void Display();
};
void main()
{
fstream InFile;
InFile.open("BOOK.DAT",ios::binary|ios::in);
BOOK B;
InFile.seekg(5*sizeof(B));
InFile.read((char*)&B, sizeof(B));
cout<<"Book Number:"<<InFile.tellg()/sizeof(B) + 1;
InFile.seekg(0,ios::end);
cout<<" of "<<InFile.tellg()/sizeof(B)<<endl;
InFile.close();
}

Ans ​Book Number: 7 of 200

(½ Mark for displaying correct value of InFile.tellg()/sizeof(B) + 1)
(½ Mark for displaying correct value of InFile.tellg()/sizeof(B))

SECTION B - (Only for candidates, who opted for Python)
1 (a) Which of the following can be used as valid variable identifier(s) in Python 2
(i)​ ​total
(ii)​ ​7Salute
(iii)​ ​Que$tion
(iv)​ ​global
Ans (i)​ total

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