CBSE Class 12 Computer Science Old Boards 2020 Sample Paper Solved

Computer Science
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Here is the CBSE Class 12 Computer Science Old Boards 2020 Sample Paper Solved for your practice. Download professional Class 12 Computer Science sample papers featuring clear solutions, aligned with the 2026-27 syllabus standards of CBSE, NCERT, and KVS. Solving these mock sets lets students test their skills against current exam criteria.

Solved Sample Paper for Class 12 Computer Science PDF

Check out our Class 12 Computer Science model papers to get familiar with expected questions and chapter weightage. Practicing these guess papers regularly improves your speed and fixes weak concepts. You can also explore our historical Class 12 Computer Science Question Papers to boost your confidence further.

Class 12 Computer Science Model Paper PDF Download

CBSE Class 12 Computer Science Old Boards 2020 Sample Paper Solved. CBSE has recently released the class 12 sample papers for subject  Computer Science Old. These suggested sample papers are released every year by CBSE ahead of the class 12 board exams so that the students can understand the pattern of question paper and type of questions which is expected to come in the Class 12 board exams. Students can refer to the attached question paper along with marking scheme to understand what they can expect in the board exams in 2020. Its always better to solve the question paper first and then refer to provided answers.

 
1 (a) Write the type of C++ Operators (Arithmetic, Logical, and Relational
Operators) from thefollowing:
(i) !(ii) !=(iii) &&(iv) %
(b) Observe the following program very carefully and write the name of those 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);
}
(1)
(c) Rewrite the following C++ code after removing any/all Syntactical Error(s) 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;
}
(d) Find and write the output of the following C++ program code:
 
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] << '@' ;
}

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Model Practice Papers & Solutions for Class 12 Computer Science

How to download CBSE Class 12 Computer Science Old Boards 2020 Sample Paper Solved in PDF?

Access and download the CBSE Class 12 Computer Science Old Boards 2020 Sample Paper Solved effortlessly from our platform to gear up for your upcoming school assessments. To achieve top scores, Class 12 students must understand the structural design used by educators. We advise practicing these current Computer Science sample papers to tackle expected question types. Save files in a convenient PDF format for offline revision, and attempt them under strict home exam conditions for best results.

Why should you solve CBSE Class 12 Computer Science Old Boards 2020 Sample Paper Solved?

  • New Question Bank: This set has fresh questions for Computer Science which are different from previous years.
  • Exam Pattern Knowledge: Solving more sets will help you to understand the weightage of each chapter in Class 12 and also the type of questions asked.
  • Identify Weak Areas: Comparing your score in each set helps to find out topics in Class 12 Computer Science for which you need hard work.
  • Speed and Accuracy: Attempting MCQ questions and long-form problems for Class 12 Computer Science makes you faster and better and you will be able to finish your exam on time.

What should you do after solving CBSE Class 12 Computer Science Old Boards 2020 Sample Paper Solved?

  1. Check Your Work: Match your answers with the solutions given by our teachers in the Computer Science Sample Paper PDF.
  2. Learn from Mistakes: Class 12 students should focus on the questions which you solved incorrectly and understand the error.
  3. Revision: If you find a question difficult you should refer to the NCERT book for Class 12 Computer Science to understand concepts and then try the question again.
  4. Continuous Practice: Solve multiple sets of Computer Science sample papers from our website to build confidence before the CBSE exams.

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Are solutions provided for CBSE Class 12 Computer Science Old Boards 2020 Sample Paper Solved?

Yes, CBSE Class 12 Computer Science Old Boards 2020 Sample Paper Solved comes with detailed, teacher-verified solutions. We have provided step-by-step answers for Computer Science to help students of Class 12 understand correct methodology and marking scheme.

How can practicing CBSE Class 12 Computer Science Old Boards 2020 Sample Paper Solved help in exam preparation?

Practicing this Computer Science paper helps in time management and identifying important topics. For Class 12, solving mock papers is the best way to gain confidence and reduce exam-day anxiety.

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