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Programming for Problem Solving – Smart Prep Doc

PPS (BCS101/BCS201) exam-oriented notes based on recent 5–6 years AKTU papers and latest important-topic lists.

C Language PYQ Pattern Score 40+ / 50

Start with loops and number patterns, then arrays and functions, and finally pointers, structures, DMA and file handling. Ye doc tumhe direct scoring topics pe focus karne me help karega.

PPS units arranged by exam priority, not just syllabus order.

Unit 1 – Basics & Logic Algorithms, flowcharts, languages, data types, operators.

Unit 2 – Control & Loops ★★★ if-else, switch, loops, classic number programs.

Unit 3 – Functions & Recursion ★★ Functions, parameter passing, recursion patterns.

Unit 4 – Arrays, Strings, Sorting ★★★ 1D/2D arrays, strings, searching, sorting.

Unit 5 – Pointers, Structures, DMA, Files ★★ Pointer basics, structures, malloc/calloc, file I/O.

Unit 2 – Control Statements & Loops

Weightage: ★★★ · Most scoring

Must-Know Concepts

Decision statements: if, if-else, nested if, switch with menu-driven examples.
Loops: for, while, do-while – syntax, flow and small examples.
Jump statements: break, continue, goto – exam theory + short examples.

Most Repeated Programs

Check whether a number is prime.
Check whether a number is palindrome.
Check whether a number is an Armstrong number.
Generate Fibonacci series up to n terms.
Find factorial of a number using loop.
Find sum of digits of a number.
Menu-driven simple calculator using switch.

Prime Number Pattern

int n, i, flag = 0;
printf("Enter a number: ");
scanf("%d", &n);
for (i = 2; i <= n/2; i++) {
    if (n % i == 0) {
        flag = 1;
        break;
    }
}
if (flag == 0 && n > 1)
    printf("Prime");
else
    printf("Not prime");

Exam Hints

Har program me clear input-output messages likho (user-friendly).
Loop ke andar sahi initialization/update check karo – off-by-one error se bach.
Comments se logic explain karo (2–3 lines max) for better presentation.

Unit 4 – Arrays, Strings, Searching & Sorting

Weightage: ★★★ · Frequently asked

Key Exam Topics

1D array: input, output, sum, average, largest and smallest element.
2D array (matrix): addition, subtraction and multiplication programs.
String handling: length, copy, compare, reverse using library and without library.
Searching: linear search and binary search in an array.
Sorting: bubble sort program (very high frequency), selection sort sometimes.

Standard Asked Programs

Find largest element in an array.
Search an element using linear search / binary search.
Sort an array of numbers using bubble sort.
Multiply two matrices (check order before multiplication).
Reverse a string and check palindrome string.

Bubble Sort Pattern

int a[50], n, i, j, temp;
printf("Enter n: ");
scanf("%d", &n);
for (i = 0; i < n; i++)
    scanf("%d", &a[i]);

for (i = 0; i < n-1; i++) {
    for (j = 0; j < n-1-i; j++) {
        if (a[j] > a[j+1]) {
            temp = a[j];
            a[j] = a[j+1];
            a[j+1] = temp;
        }
    }
}
printf("Sorted array: ");
for (i = 0; i < n; i++)
    printf("%d ", a[i]);

Matrix Multiplication Tips

Check condition: columns of first matrix = rows of second matrix.
Use three nested loops: i (rows), j (columns), k (for multiplication and sum).
Initialize result matrix elements to 0 before inner loop.

Unit 3 – Functions & Recursion

Weightage: ★★

Important Concepts

Function definition, declaration and calling.
Return type, parameters, local and global variables.
Call by value vs call by reference (pointer use).
Recursion: idea, base case, recursive case.

Common Programs

Factorial of a number using recursion.
Fibonacci series using recursion.
Sum of digits using recursion.
Swapping two numbers using call by reference (pointers).

Factorial Using Recursion

int fact(int n) {
    if (n == 0 || n == 1)
        return 1;
    else
        return n * fact(n - 1);
}

Exam Hints

Recursion me base case clearly likhna zaroori hai, warna infinite recursion ho sakti hai.
Call by reference wale program me address pass karo, pointer se value change karo.

Unit 5 – Pointers, Structures, DMA & Files

Weightage: ★★

Key Theory Points

Pointer definition, declaration, initialization, * and & operators.
Pointers and arrays, pointer arithmetic basics.
Structures: definition, declaration, accessing members, array of structures.
Difference between structure and union.
Dynamic Memory Allocation: malloc, calloc, realloc, free.
File handling: FILE*, fopen, fprintf, fscanf, fclose.

Typical Question Styles

Explain pointers in C with examples. Why are they needed?
Write a program to store and display information of students using structure.
Write short notes on malloc, calloc, realloc and free.
Write a program to create a text file and write some content into it.

Simple File Write Pattern

FILE *fp;
fp = fopen("data.txt", "w");
if (fp == NULL) {
    printf("File not created");
} else {
    fprintf(fp, "Hello PPS!");
    fclose(fp);
}

DMA Pattern

int *arr, n, i;
printf("Enter n: ");
scanf("%d", &n);
arr = (int *)malloc(n * sizeof(int));
if (arr == NULL) {
    printf("Memory not allocated");
} else {
    for (i = 0; i < n; i++)
        scanf("%d", &arr[i]);
}
free(arr);

Unit 1 – Basics, Algorithms & Flowcharts

Weightage: ★ (Easy theory)

Often Asked Theory

Definition of algorithm and flowchart; difference between them.
Advantages and limitations of flowcharts.
Types of programming languages: machine, assembly, high-level.
Compiler vs interpreter.
Data types in C and ranges; types of operators and precedence.

Quick Tip

Ye unit se short answers aate hain, jinhe rat ke 10–15 minute revision se pakka marks milte hain.
At least ek simple flowchart practice karo (sum of first n natural numbers jaisa).

Score 40+ / 50 Strategy

Use this simple sequence if exam nazdeek hai.

Priority Steps

Day 1–2: Master all loop-based programs (prime, palindrome, Armstrong, factorial, Fibonacci, sum of digits).
Day 3: Do arrays and sorting (largest in array, search, bubble sort, matrix multiplication).
Day 4: Functions and recursion (factorial, Fibonacci, sum using recursion; call by reference).
Day 5: Pointers, structures, DMA and simple file program.
Last day: Only theory revision (algorithm vs flowchart, data types, operators) + PYQ practice.

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Programming for Problem Solving – Smart Prep Doc

Contents

Unit 2 – Control Statements & Loops

Unit 4 – Arrays, Strings, Searching & Sorting

Unit 3 – Functions & Recursion

Unit 5 – Pointers, Structures, DMA & Files

Unit 1 – Basics, Algorithms & Flowcharts

Score 40+ / 50 Strategy

Priority Steps

MyCollegeVerse Resources

PPS AKTU NOTES

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