CBSE Class 12 Computer Science Worksheet Set A Solved

Read and download free pdf of CBSE Class 12 Computer Science Worksheet Set A Solved. Download printable Computer Science Class 12 Worksheets in pdf format, CBSE Class 12 Computer Science All Chapters Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Computer Science Class 12 Assignments and practice them daily to get better marks in tests and exams for Class 12. Free chapter wise worksheets with answers have been designed by Class 12 teachers as per latest examination pattern

All Chapters Computer Science Worksheet for Class 12

Class 12 Computer Science students should refer to the following printable worksheet in Pdf in Class 12. This test paper with questions and solutions for Class 12 Computer Science will be very useful for tests and exams and help you to score better marks

Class 12 Computer Science All Chapters Worksheet Pdf

1 a. Find the output of the following C++ code considering that the binary file SCHOOLS.DAT exists on the hard disk with the following records of 6 schools of the following class school.

CBSE Class 12 Computer Science Worksheet Set A Solved 1
 
class school
{ int Scode; //School Code
char Sname[20]; //School Name
int nooftr; //Number of Teachers in the school
public:
void Display()
{cout<
int RNOT()
{return nooftr;}
};
void main()
{ fstream SFIN;
SFIN.open(“SCHOOLS.DAT”,ios::binary|ios::in);
school S;
SFIN.seekg(3*sizeof(S));
SFIN.read((char*)&S, sizeof(S));
S.Display();
cout<<”Record :”<
SFIN.close();
}
 
b. Given a binary file STUDENT.DAT, containing records of the following class student type
class Student
{ char S_Admno[lO]; //Admission number of student
char S_Name[30]; //Name of student
int Percentage; //Marks Percentage of student
public:
void EnterData()
{ gets(S_Admno);
gets(S_Name);
cin>>Percentage; }
void DisplayData()
{ cout<
char * retadmno()
{ return (S_Admno); }
};
Write a function to accept an admission number from user and modify that record in the file.
 
c. Given a binary file directory.dat containing records of the phone with following structure struct phone
{ char name[20];
char address[30];
char phone[10]; };
Write a function shift_mtnl() in C++ that would display and copy all those records
which are having phone number starting with digit 2 from directory.dat to jio.dat
 
d. a) Write a difference ios::app and ios::in.
b) What is purpose of tellp() function.
 
2 a. Find the output for the following code assume all required header files are already included in the program.
 
Void main ( )
{
int Track [] = {10,20,30,40},*Striker ;
Striker=Track ;
Track [1] += 30 ;
cout<<”Striker”<<*Striker<
*Striker -=10 ;
Striker++;
cout<<”Next @”<<*Striker <
Striker +=2 ;
cout<<”last @”<<*Striker<<’\t’<
}
 
b. Find the output for the following code assume all required header files are already included in the program.
 
Void strcon(char s[])
{
int ©,l,j;
for(i=0,l=0;s[i]!=’\0’;i++,l++);
for(j=0; j
{ if (islower(s[j]))
s[j]=toupper(s[j]);
else if ( isupper(s[j]))
s[j]=toupper(s[j])-2;
else
s[j]=’@’; }}
void main()
{
char *c=”SwaPNa arman”;
strcon©;
cout<<”First Text = “<
c=c+3;
cout<<”Mid Text = “<
c=c+4-2;
cout<<”Last Text = “<
}
 
c. Write the output of the following C++ program code assume all required header
files are already included in the program.
#include
#define Modify(N) N*3+100
void main()
{
int LIST[]={10,15,12,17};
int *P=LIST, C;
for(C=0; C<4; C++)
{
*P=Modify(*P);
P++;
}
for (C=3; C>=0; C--)
{
cout<
}
}
 
 
d. What is pointer variable? Write the use of new and delete operator.


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CBSE Class 12 Computer Science All Chapters Worksheet

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