CBSE Class 12 Computer Science Sample Paper 2021 Set B

CBSE Class 12 Computer Science Sample Paper 2021 Set B. CBSE issues sample papers every year for students for Class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.

1 a)Find the valid identifier out of the following:

this, Delete, A&B, _Counter, 12class

 b)Identify the syntax error(s) and perform the following:

- underline each correction

-giving reason for error

-Assuming the required header files have been included

structure Swimmingclub

{

int memnumber;

char memname[20];

char memtype[ ] = "LIG";

};

void main()

{

Swimminglcub per1, per2;

cin>> "Member Number:";

cout<< memnumber.per1;

cout << "Member Name :";

cin >> peer1.membername;

per1.memtype = "HIG";

per2 = per1;

cin>> "Member Number :" >> per2.memnumber;

cin >>"Member Name :" >>per2.memname;

cin >> "Member Number :">> per2.memtype;

}

c)Name the header files that shall be included for the successful compilation of the following code snippet ,in C++:

void main( )

{

char str[30],c;

gets(str);

strcat(str,”AISSCE 2012”);

puts(str);

cout<<isupper(c);

}

d)Study the following program and select the possible output(s) from the options (i) to

(iv). Also, write the maximum and the minimum values that can be assigned to the variable NUM.

Note :

– Assume all required header files are already being included in the program.

– random(n) function generates an integer between 0 and n – 1.

void main()

{

randomize( );

int NUM;

NUM=random(3)+2;

char TEXT[]=”ABCDEFGHIJK”;

for (int I=1;I<=NUM; I++)

{

for(int J=NUM; J<=7;J++) cout<<TEXT[J];

cout<<endl;

}

}

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