NIOS Class 12 Computer Science 330 Solved Practical File

NIOS Class 12 Computer Science 330 Solved Practical File

Written by Prateek Talwar · Reviewed by Jyoti Sharma, Senior NIOS Counsellor · Updated for the 2026 session

NIOS Class 12 Computer Science 330 Solved Practical File is the one part of the course where you can pick up easy marks without fighting a tricky theory question. Every activity in the file is a hands-on demonstration, not a memory test. The catch is neatness, completeness and whether the work reads like your own. Examiners reward files that show real observation, correct steps and honest conclusions.

We prepare the whole file by hand for students who do not have the time, the confidence or the drawing skills to reproduce ten experiments with diagrams, flowcharts and labelled outputs. What you see below is the actual experiment list, a fifteen-page sample preview, and an honest explanation of how we build each program page.

Computer Science 330 Practical File at a Glance

What the Computer Science 330 Practical File Includes

The 330 practical file runs to ten experiments spread across roughly 28 written pages. It opens with two application-based tasks and then moves into eight C++ programs that build from basic arithmetic to loops and number logic. Here is the full index, with the page span and the concepts each experiment asks you to practise.

If you want to line this index up against the official topic list, keep the NIOS Class 12 Syllabus open beside it. Every experiment above maps to a data-type, control-structure or office-tool concept from the prescribed course.

Practical Activities in the Computer Science 330 File

The file is built around two groups of work: the application-based tasks that prove you can use standard software, and the C++ programs that prove you can write and explain code. Each experiment carries the standard NIOS structure: objective, software required, procedure, observations and conclusion.

Experiments 1 and 2 — Application-Based Tasks

Experiment 1 walks you through creating an e-mail account on Gmail, Yahoo Mail or Hotmail. The file shows the sign-up page, the fields to fill, the rules for a strong password, and the terms-and-conditions step. The objective is browser literacy and secure account setup.

Experiment 2 covers the full XYZ Enterprises office task. In OpenOffice Writer you produce a formatted company report. In Calc you enter item-wise sales data and apply SUM and AVERAGE formulas. In Impress you build a 10-to-15-slide presentation with transitions. The file includes screenshots, toolbar labels and the final output for each tool.

Experiments 3 to 10 — C++ Programming

The eight C++ programs follow a clear progression. They start with variables and arithmetic, move through conditionals and character logic, then cover loops and number-theory checks. Each program page includes the objective, the algorithm or logic steps, the full source code, a sample run with input and output, and a short observation.

C++ Programs in the Computer Science 330 Practical File

All eight C++ programs are preserved below as they appear in the handwritten file. Each one is written in a single .cpp file with a header comment for your name and enrolment number. The programs use standard C++ syntax and compile under Turbo C++ or any modern C++ compiler.

Program 1 — Sum of Two Numbers (int and float)

Demonstrates basic data types, the arithmetic plus operator, type conversion and the cin/cout stream mechanism.

#include <iostream>
using namespace std;

int main()
{
    int a, b, sum;
    float x, y, total;

    cout << "Enter two integers: ";
    cin >> a >> b;
    sum = a + b;
    cout << "Sum of integers: " << sum << endl;

    cout << "Enter two float values: ";
    cin >> x >> y;
    total = x + y;
    cout << "Sum of floats: " << total << endl;

    return 0;
}

Program 2 — Area and Perimeter of a Circle

Uses the const keyword to fix Pi at 3.14, reads the radius, then calculates area and circumference using the standard formulae.

#include <iostream>
using namespace std;

int main()
{
    const float PI = 3.14;
    float r, area, perimeter;

    cout << "Enter radius: ";
    cin >> r;
    area = PI * r * r;
    perimeter = 2 * PI * r;

    cout << "Area of circle: " << area << endl;
    cout << "Perimeter of circle: " << perimeter << endl;

    return 0;
}

Program 3 — Even or Odd Number Check

Uses the conditional (ternary) operator with the modulus operator to decide whether a number is even or odd in a single expression.

#include <iostream>
using namespace std;

int main()
{
    int n;

    cout << "Enter a number: ";
    cin >> n;

    (n % 2 == 0) ? cout << n << " is Even" << endl
                 : cout << n << " is Odd" << endl;

    return 0;
}

Program 4 — Alphabet, Digit or Special Character

Uses an if else-if ladder to classify an input character by checking its ASCII value range.

#include <iostream>
using namespace std;

int main()
{
    char ch;

    cout << "Enter a character: ";
    cin >> ch;

    if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z'))
        cout << ch << " is an Alphabet" << endl;
    else if (ch >= '0' && ch <= '9')
        cout << ch << " is a Digit" << endl;
    else
        cout << ch << " is a Special Character" << endl;

    return 0;
}

Program 5 — Day of the Week Using Switch-Case

Takes a number from 1 to 7 and prints the corresponding weekday. A default case handles out-of-range input.

#include <iostream>
using namespace std;

int main()
{
    int day;

    cout << "Enter a number (1 to 7): ";
    cin >> day;

    switch(day)
    {
        case 1: cout << "Monday" << endl; break;
        case 2: cout << "Tuesday" << endl; break;
        case 3: cout << "Wednesday" << endl; break;
        case 4: cout << "Thursday" << endl; break;
        case 5: cout << "Friday" << endl; break;
        case 6: cout << "Saturday" << endl; break;
        case 7: cout << "Sunday" << endl; break;
        default: cout << "Invalid input! Enter 1 to 7." << endl;
    }

    return 0;
}

Program 6 — Multiples of 5 Using While Loop

Displays multiples of 5 from 100 down to 50 using a while loop with a clear termination condition and a decrement step.

#include <iostream>
using namespace std;

int main()
{
    int i = 100;

    cout << "Multiples of 5 from 100 to 50:" << endl;

    while (i >= 50)
    {
        cout << i << endl;
        i = i - 5;
    }

    return 0;
}

Program 7 — Fibonacci Series Using Do-While Loop

Generates the Fibonacci series using a do-while loop, which runs the block once before testing the condition.

#include <iostream>
using namespace std;

int main()
{
    int n, i = 0, first = 0, second = 1, next;

    cout << "Enter number of terms: ";
    cin >> n;

    cout << "Fibonacci Series: ";

    do {
        if (i <= 1)
            next = i;
        else {
            next = first + second;
            first = second;
            second = next;
        }
        cout << next << " ";
        i++;
    } while (i < n);

    cout << endl;
    return 0;
}

Program 8 — Armstrong Number Check Using For Loop

Checks whether a 3-digit number is an Armstrong number by iterating over its digits, cubing each one and summing the results.

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    int num, original, remainder, result = 0;

    cout << "Enter a number: ";
    cin >> num;

    original = num;

    while (num != 0)
    {
        remainder = num % 10;
        result = result + pow(remainder, 3);
        num = num / 10;
    }

    if (result == original)
        cout << original << " is an Armstrong number" << endl;
    else
        cout << original << " is NOT an Armstrong number" << endl;

    return 0;
}

Sample Pages from Our Computer Science 330 Practical File

You should never order a file you have not seen. Below are 15 real pages from our Computer Science 330 record book, covering the index and experiments 1 to 5 in full. Look at the handwriting, the labelled diagrams, and the way each observation is written in plain sentences. That is the standard you receive across all ten experiments.

• Preview 1: Index page listing all ten experiments with page numbers and columns for date and signature.
• Preview 2: Cover page with student name, enrolment number, subject and session details filled in.
• Preview 3: Experiment 1 objective, software required and pre-requisite for creating an e-mail account.
• Preview 4: Hand-drawn sign-up screen sketches for Gmail, Yahoo Mail and Hotmail.
• Preview 5: Step-by-step procedure with dos and don'ts for the e-mail creation task.
• Preview 6: Learner's observations written in the first person about what happened at each step.
• Preview 7: Experiment 2 full problem statement for the XYZ Enterprises office task.
• Preview 8: OpenOffice Writer screen sketch showing the company report with headings and formatting.
• Preview 9: Calc spreadsheet with item-wise sales data and AVERAGE and SUM formulas visible.
• Preview 10: Impress slide deck thumbnail showing 10 to 15 slides with transitions noted.
• Preview 11: Observations comparing the three OpenOffice tools and what each produced.
• Preview 12: Experiment 3 objective, algorithm and pre-requisite for the sum-of-two-numbers C++ program.
• Preview 13: Full C++ source code for the integer and float sum with input and output shown.
• Preview 14: Labelled circle diagram showing radius, diameter and centre for experiment 4.
• Preview 15: Area and perimeter formulae with sample calculation and learner observations.

The remaining pages, experiments 6 to 10, carry the same care: the if else-if ladder for character checks, the switch-case day-of-week table, the while and do-while loops, and the Armstrong number working with its cube breakdown of 153. You receive the complete set, not a trimmed version.

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What You Get in the NIOS Class 12 Computer Science 330 Practical File

When you order from us, you receive a complete, ready-to-submit record book, not a rough draft you still have to copy. The index is filled in, every experiment is written out in order, and the programs are formatted with proper indentation, comments and output screenshots. You add your name, enrolment number and dates, and carry it to your study centre.

Each experiment carries the standard NIOS structure so nothing looks improvised: a clear title, the objective, the software or tools required, the step-by-step procedure, the program listing or screen sketch, and a one-line conclusion. That fixed structure is what a checker scans for, and a file that follows it top to bottom rarely loses presentation marks.

The record is genuinely written by hand. C++ programs are written with proper indentation and comment headers, diagrams are drawn rather than printed, and observations describe real output rather than a generic sentence. If you have already browsed our wider NIOS Class 12 Practical Files collection, this Computer Science file is built to the same finish.

How the Practical File Fits the NIOS 330 Syllabus

The 330 practical is built to test a spread of skills, not one favourite trick. That is why the scheme leans on office tools, C++ programming, algorithms and file handling. Our ten experiments were picked to touch each of those areas rather than crowd into one.

Preparing the file carefully quietly revises a large slice of the theory syllabus too. For the full topic-wise breakdown, our NIOS Study Material section maps each experiment back to its lesson.

Why the Practical File Needs to Be Handwritten

The commonest slip is handing in a file that is clearly printed or copied. When an examiner opens a record book that looks mass-produced, both presentation marks and credibility drop. Our files are written afresh by hand, so each one reads like a genuine student record.

Legibility matters just as much. A file can be correct and still lose marks if the handwriting is messy, headings are inconsistent, or the code is poorly indented. We write in clean, consistent script with proper headings for objective, software required, procedure, program and observations, so the record book reads quickly and scans well.

Every program in the file follows the format your course expects: your name and enrolment number as a comment on top, a proper .cpp filename, and all programs placed in a single folder. Those small details are the ones a viva examiner checks first.

How We Prepare Each Computer Science 330 Practical File

We do not template these files or photocopy an old one. Each order is written individually, because handwriting, ink shade and the specific way a flowchart is drawn are exactly what tell a checker the work is a student's own.

The application-based experiments are the most visual part. We sketch the e-mail sign-up screens by hand, draw the OpenOffice interface windows with toolbar labels, and include the actual spreadsheet with the AVERAGE and SUM formulas visible. The observations describe what a real student would see on screen, not a generic textbook sentence.

For the C++ programs, we write each source file in a standard format: the header comment with name and enrolment, the #include lines, the main() function with proper indentation, and a sample run showing the input entered and the output produced. Flowcharts are drawn for the programs that need them, and the if-else and switch-case tables are labelled clearly.

Every file we build follows the same official sequence used across the NIOS Solved Lab Manual, so your Computer Science file sits comfortably next to files for other practical subjects.

Marks and Scoring for Computer Science 330 Practical

The practical assessment is split across three parts: the record book you submit, the live program you run in front of the examiner, and a short viva voce on what you have written. A well-kept file gives you a head start on all three, because the examiner forms a first impression from the book before you type a single line.

Marks are usually split across the file, the live execution, and the viva voce. The exact division can vary by session and centre, so treat any figure you read online as indicative and confirm the current break-up with your study centre. What does not change is that a clean, complete file protects the portion tied to the record book.

How to Order Your Computer Science 330 Practical File for 2026

Ordering is quick and there is no long form to fill. You message our NIOS desk, share a few details, and we start on your file.

1. Message our NIOS desk on WhatsApp at 9654279279.
2. Tell us your name, enrolment number, and the session you are appearing in, either October 2026 or April 2026.
3. Confirm that you want Computer Science (330) and mention any special instruction your regional centre has given.
4. We prepare the handwritten file for all ten experiments and share progress with you.
5. You receive the completed file, ready to submit.

If the first line is busy, message 9899436384 and we will pick up from there. We confirm the price, the delivery window and how the folder reaches you before anything is finalised.

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If you are also assembling your wider preparation, our full NIOS Study Material library sits alongside the practical files, so you can pick up solved assignments and notes in the same place.

Who Prepares the Computer Science 330 Practical File at Unnati

The files are prepared under Prateek Talwar, who has built out NIOS content at Unnati Educations, and reviewed by Jyoti Sharma, our senior NIOS counsellor. Between them they have handled a large number of NIOS submissions across streams, so the file reflects what centres actually accept rather than a generic template.

That experience shows up in the details: the correct sequence of headings, observations that match the real behaviour of Turbo C++ and OpenOffice, and diagrams placed exactly where the experiment expects them. It is the difference between a file that was written to be submitted and one that was written to be understood.

Disclaimer: Unnati Educations is an independent academic support platform and is not affiliated with, endorsed by, or connected to the National Institute of Open Schooling (NIOS). All subject codes and references to NIOS are used only to describe the material we prepare.

FAQs on the Computer Science 330 Practical File