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🔥 Top 70 C Programming Viva Questions with Detailed Answers – Part 3

(Pointers, Dynamic Memory & Advanced Concepts – Questions 42–70)

📌 Read Part 1 (Questions 1–25) here: [https://learninggrowthhub.blogspot.com/2026/02/top-70-c-programming-viva-questions.html]

📌 Read Part 2 (Questions 26–42) here: [https://learninggrowthhub.blogspot.com/2026/02/%20Top%2070%20C%20Programming%20Viva%20Questions%20with%20Detailed%20Answers%20%20Part%202_0831447901.html]

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🚀 Introduction

Welcome to the final part of the Top 70 C Programming Viva Series.

In this section, we will master:

Deep Pointer Concepts
Memory Management
Stack vs Heap
Dynamic Allocation
Function Pointers
Double Pointers
Segmentation Fault
Real Interview Trap Questions

⚡ If you understand this section clearly, you are ahead of most C learners.

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✅ Q43. What is a Pointer in C?

🎯 Detailed Answer:

A pointer is a variable that stores the memory address of another variable instead of storing a normal value.

Every variable in C is stored in memory. A pointer helps us access and manipulate that memory directly.

👉 In simple words:
A pointer tells us where a value is stored, not the value itself.

---

💻 Program (Each Line Commented)

#include <stdio.h>              // Include standard input-output library

int main()                      // Main function starts
{
    int x = 10;                 // Declare integer variable x and assign value 10
    
    int *p;                     // Declare pointer variable that can store address of an integer
    
    p = &x;                     // Store address of variable x into pointer p
    
    printf("Value of x: %d\n", x);        // Print value stored in x
    
    printf("Address of x: %p\n", &x);     // Print memory address of x using %p
    
    printf("Value using pointer: %d\n", *p);  // Dereference pointer to print value
    
    return 0;                   // Indicate successful program execution
}

🧠 Time Complexity: O(1)
⚠ Edge Case: If pointer is not initialized and used → segmentation fault
❌ Common Mistake: Confusing *p (value) with p (address)
💡 Viva Tip: Clearly explain difference between address and value
🚀 Interview Insight: Most pointer discussions start from this question

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✅ Q44. What is Dereferencing?

🎯 Detailed Answer:

Dereferencing means accessing the value stored at the memory address using * operator.

If:

p = &x

Then:

*p gives value of x

👉 When we use *p, we are saying:
“Go to the memory location stored in p and give me the value.”

---

💻 Program (Each Line Commented)

#include <stdio.h>          // Include standard input-output header

int main()                  // Main function starts
{
    int x = 25;             // Declare integer variable x and initialize with 25
    
    int *p = &x;            // Declare pointer p and store address of x
    
    *p = 50;                // Modify value at address stored in p (changes x to 50)
    
    printf("%d", x);        // Print updated value of x (prints 50)
    
    return 0;               // End program successfully
}

🧠 Time Complexity: O(1)
⚠ Edge Case: Dereferencing NULL pointer → crash
❌ Common Mistake: Forgetting * while accessing value
💡 Viva Tip: Explain that dereferencing modifies original variable

---

✅ Q45. Explain Pointer Arithmetic

🎯 Detailed Answer:

Pointer arithmetic allows movement through memory locations.

If pointer is int *p, and we do:

p = p + 1

It moves by size of int (usually 4 bytes), not 1 byte.

👉 Pointer moves based on data type size.

---

💻 Program (Each Line Commented)

#include <stdio.h>              // Include standard input-output header

int main()                      // Main function begins
{
    int arr[3] = {10, 20, 30};  // Declare integer array of size 3
    
    int *p = arr;               // Pointer p stores base address of array
    
    printf("%d\n", *p);         // Print first element (arr[0])
    
    p++;                        // Move pointer to next integer location
    
    printf("%d\n", *p);         // Print second element (arr[1])
    
    return 0;                   // End program
}

🧠 Time Complexity: O(1)
❌ Common Mistake: Thinking pointer increases by 1 byte
💡 Viva Tip: Always mention size of datatype

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✅ Q46. Call by Value vs Call by Reference

🎯 Detailed Explanation:

When we pass variables to a function, C can pass them in two ways.

---

🔹 Call by Value

A copy of the variable is passed.
Changes inside the function do NOT affect the original variable.

Example idea:

x = 5
Function receives copy of 5
Function changes copy to 10
Original x still remains 5

---

🔹 Call by Reference

Address of variable is passed.
Function directly accesses original memory.

So changes inside function affect original variable.

---

💻 Program (Swap Using Reference – Fully Commented)

#include <stdio.h>              // Include standard input-output header

void swap(int *a, int *b)       // Function receives addresses of two integers
{
    int temp;                   // Temporary variable to store value
    
    temp = *a;                  // Store value at address a
    
    *a = *b;                    // Replace value at address a with value at address b
    
    *b = temp;                  // Replace value at address b with temp value
}

int main()                      // Main function starts
{
    int x = 5, y = 10;          // Declare two integer variables
    
    swap(&x, &y);               // Pass addresses of x and y
    
    printf("%d %d", x, y);      // Print swapped values
    
    return 0;                   // End program
}

🧠 How to Understand Easily

• &x gives address

• Function receives address

• *a modifies original memory

• That’s why swap works

🧠 Time Complexity: O(1)
⚠ Edge Case: Passing NULL pointer
❌ Common Mistake: Forgetting * inside function

---

✅ Q47. What is a NULL Pointer?

🎯 Detailed Explanation:

A NULL pointer does not point to any valid memory location.

int *p = NULL;   // Pointer safely initialized to nothing

👉 It prevents accidental access to random memory.

Always set pointer to NULL after free().

🧠 Time Complexity: O(1)
⚠ Edge Case: Dereferencing NULL causes crash
❌ Common Mistake: Thinking NULL means zero value

---

✅ Q48. What is a Wild Pointer?

🎯 Detailed Explanation:

A pointer declared but not initialized.

int *p;   // Wild pointer

It contains garbage address.

If used → program crash.

👉 Always initialize pointer with NULL or valid address.

🧠 Time Complexity: O(1)
❌ Common Mistake: Using pointer before assigning address

---

✅ Q49. What is a Dangling Pointer?

🎯 Detailed Explanation:

A dangling pointer points to memory that has already been freed.

---

💻 Program (Each Line Commented)

#include <stdio.h>              // Standard input-output header
#include <stdlib.h>             // Required for malloc and free

int main()                      // Main function starts
{
    int *p = (int*)malloc(sizeof(int));  // Allocate memory in heap
    
    *p = 100;                   // Store value in allocated memory
    
    free(p);                    // Free allocated memory
    
    p = NULL;                   // Prevent dangling pointer
    
    return 0;                   // End program
}

🧠 Time Complexity: O(1)
❌ Common Mistake: Using pointer after free()
⚠ Edge Case: Forgetting free() causes memory leak

---

✅ Q50. What is Dynamic Memory Allocation?

🎯 Detailed Explanation:

Dynamic Memory Allocation means allocating memory during runtime.

Used when size is unknown at compile time.

Functions used:

• malloc()

• calloc()

• realloc()

• free()

👉 Required for linked list, trees, dynamic arrays.

🧠 Time Complexity: O(1)
⚠ Edge Case: Allocation failure
❌ Common Mistake: Forgetting free()

---

✅ Q51. Write Program Using malloc()

🎯 Detailed Explanation:

malloc allocates memory but does not initialize it.

Always check if malloc returns NULL.

---

💻 Program (Each Line Commented)

#include <stdio.h>              // Include input-output header
#include <stdlib.h>             // Include memory allocation functions

int main()                      // Main function begins
{
    int *p;                     // Declare pointer
    
    p = (int*)malloc(sizeof(int));  // Allocate memory for one integer
    
    if(p == NULL)               // Check allocation failure
    {
        printf("Memory not allocated");  // Error message
        return 0;               // Exit program
    }
    
    *p = 25;                    // Store value in allocated memory
    
    printf("%d", *p);           // Print stored value
    
    free(p);                    // Free allocated memory
    
    p = NULL;                   // Prevent dangling pointer
    
    return 0;                   // End program
}

🧠 Time Complexity: O(1)
⚠ Edge Case: malloc returns NULL
❌ Common Mistake: Not checking NULL

✅ Q52. What is a Pointer in C?

📘 Explanation

A pointer is a variable that stores the memory address of another variable.

& → Address-of operator

• → Dereference operator

Pointer improves efficiency and dynamic memory usage

---

💻 Program: Basic Pointer Example

#include <stdio.h>          // Includes standard input-output library for printf

int main()                  // Main function starts execution
{
    int num = 10;           // Declare integer variable and initialize with 10
    int *ptr;               // Declare a pointer variable that can store address of int

    ptr = &num;             // Store address of variable num into pointer ptr

    printf("Value of num: %d\n", num);          // Print value stored in num
    printf("Address of num: %p\n", &num);       // Print memory address of num
    printf("Pointer value: %p\n", ptr);         // Print address stored inside pointer
    printf("Value using pointer: %d\n", *ptr);  // Dereference pointer to get value at stored address

    return 0;               // Return 0 indicates successful program execution
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Uninitialized pointer causes garbage access
❌ Common Mistake: Forgetting to initialize pointer before use

---

✅ Q53. What is NULL Pointer?

📘 Explanation

A NULL pointer does not point to any valid memory location.
It is used to indicate “no address”.

---

💻 Program

#include <stdio.h>          // Standard input-output library
#include <stdlib.h>         // Standard library (defines NULL)

int main()                  // Main function
{
    int *ptr = NULL;        // Initialize pointer with NULL (points to nothing)

    if(ptr == NULL)         // Check whether pointer is NULL
    {
        printf("Pointer is NULL\n");   // Print message if pointer is NULL
    }

    return 0;               // End of program
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Dereferencing NULL causes crash
❌ Common Mistake: Using pointer without checking NULL

---

✅ Q54. What is Dangling Pointer?

📘 Explanation

A dangling pointer points to memory that has already been freed.

---

💻 Program Example

#include <stdio.h>          // Standard input-output header
#include <stdlib.h>         // Required for malloc() and free()

int main()                  // Main function
{
    int *ptr = (int*)malloc(sizeof(int));  // Allocate memory for one integer
    *ptr = 5;                              // Store value 5 at allocated memory location

    free(ptr);                             // Free the allocated memory

    ptr = NULL;                            // Assign NULL to avoid dangling pointer

    return 0;                              // End program
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Accessing freed memory causes undefined behavior
❌ Common Mistake: Not setting pointer to NULL after free

---

✅ Q55. Program Using malloc()

#include <stdio.h>          // Standard input-output header
#include <stdlib.h>         // Required for malloc() and free()

int main()                  // Main function
{
    int n, i;               // Declare variables for size and loop counter
    printf("Enter number of elements: ");   // Ask user for input size
    scanf("%d", &n);        // Read number of elements from user

    int *arr = (int*)malloc(n * sizeof(int));   // Dynamically allocate memory for n integers

    if(arr == NULL)         // Check if memory allocation failed
    {
        printf("Memory not allocated\n");   // Print error message
        return 1;           // Exit program with error code
    }

    for(i = 0; i < n; i++)  // Loop to take input
    {
        scanf("%d", &arr[i]);   // Store input value in allocated memory
    }

    for(i = 0; i < n; i++)  // Loop to print values
    {
        printf("%d ", arr[i]);  // Print each element
    }

    free(arr);              // Free allocated memory to prevent memory leak

    return 0;               // Successful termination
}

🧠 Time Complexity: O(n)
⚠️ Edge Case: If n = 0, allocation size becomes zero
❌ Common Mistake: Forgetting to free memory

---

✅ Q56. What is realloc()?

💻 Program

#include <stdio.h>          // Standard input-output header
#include <stdlib.h>         // Required for malloc() and realloc()

int main()                  // Main function
{
    int *ptr;               // Declare pointer
    int n = 3, i;           // Initial size is 3

    ptr = (int*)malloc(n * sizeof(int));  // Allocate memory for 3 integers

    for(i = 0; i < n; i++)  // Initialize allocated memory
        ptr[i] = i + 1;     // Assign values 1, 2, 3

    n = 5;                  // Increase size to 5
    ptr = (int*)realloc(ptr, n * sizeof(int));  // Resize memory block

    for(i = 3; i < n; i++)  // Initialize newly allocated memory
        ptr[i] = i + 1;     // Assign values 4 and 5

    for(i = 0; i < n; i++)  // Print all elements
        printf("%d ", ptr[i]);  // Output values

    free(ptr);              // Free allocated memory

    return 0;               // End program
}

🧠 Time Complexity: O(n)
⚠️ Edge Case: realloc may return NULL
❌ Common Mistake: Overwriting original pointer without checking

---

✅ Q57. What is Structure in C?

💻 Program

#include <stdio.h>          // Standard input-output header

struct Student              // Define structure named Student
{
    int roll;               // Integer member roll number
    char name[20];          // Character array for name
    float marks;            // Float variable for marks
};

int main()                  // Main function
{
    struct Student s;       // Declare structure variable

    printf("Enter roll, name and marks: ");   // Prompt user
    scanf("%d %s %f", &s.roll, s.name, &s.marks);   // Take input

    printf("Roll: %d\n", s.roll);     // Print roll number
    printf("Name: %s\n", s.name);     // Print name
    printf("Marks: %.2f\n", s.marks); // Print marks up to 2 decimal

    return 0;               // End program
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Buffer overflow in string input
❌ Common Mistake: Forgetting & for non-string members

---

✅ Q58. What is Pointer to Structure?

#include <stdio.h>          // Standard input-output header

struct Student              // Define structure
{
    int roll;               // Roll number
    float marks;            // Marks
};

int main()                  // Main function
{
    struct Student s = {1, 90.5};   // Initialize structure variable
    struct Student *ptr = &s;       // Pointer stores address of structure

    printf("Roll: %d\n", ptr->roll);    // Access roll using arrow operator
    printf("Marks: %.2f\n", ptr->marks); // Access marks using arrow operator

    return 0;               // End program
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Accessing via NULL pointer
❌ Common Mistake: Using . instead of ->

---

✅ Q59. Program to Write to File

#include <stdio.h>          // Standard input-output header

int main()                  // Main function
{
    FILE *fp = fopen("data.txt", "w");  // Open file in write mode

    if(fp == NULL)          // Check if file failed to open
    {
        printf("File not opened\n");   // Error message
        return 1;           // Exit program
    }

    fprintf(fp, "Hello Krishna");   // Write text into file
    fclose(fp);                     // Close file to save changes

    return 0;               // End program
}

🧠 Time Complexity: O(n)
⚠️ Edge Case: File permission issue
❌ Common Mistake: Not checking NULL

---

✅ Q60. Program to Read from File

#include <stdio.h>          // Standard input-output header

int main()                  // Main function
{
    FILE *fp = fopen("data.txt", "r");   // Open file in read mode
    char ch;                            // Variable to store each character

    if(fp == NULL)                      // Check if file exists
    {
        printf("File not found\n");     // Print error
        return 1;                       // Exit program
    }

    while((ch = fgetc(fp)) != EOF)      // Read character until End Of File
    {
        printf("%c", ch);               // Print each character
    }

    fclose(fp);                         // Close file

    return 0;                           // End program
}

🧠 Time Complexity: O(n)
⚠️ Edge Case: Empty file
❌ Common Mistake: Comparing char with EOF incorrectly

✅ Q61. What is Double Pointer in C?

📘 Explanation

A double pointer is a pointer that stores the address of another pointer.

Syntax:

int **ptr;

It is mainly used in:

• Dynamic memory (2D allocation)

• Function arguments (modify pointer inside function)

---

💻 Program

#include <stdio.h>              // Standard input-output header

int main()                      // Main function
{
    int num = 20;               // Normal integer variable
    int *ptr = &num;            // Pointer storing address of num
    int **dptr = &ptr;          // Double pointer storing address of ptr

    printf("Value of num: %d\n", num);        // Print value of num
    printf("Value using ptr: %d\n", *ptr);    // Dereference single pointer
    printf("Value using dptr: %d\n", **dptr); // Dereference double pointer

    return 0;                   // End program
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: If pointer is NULL, double dereferencing crashes
❌ Common Mistake: Confusing *ptr and **ptr

---

✅ Q62. Passing Pointer to Function

📘 Explanation

Pointers allow functions to modify original variable values.

This is called Call by Reference.

---

💻 Program (Swap using Pointer)

#include <stdio.h>                  // Standard input-output header

void swap(int *a, int *b)           // Function with pointer parameters
{
    int temp;                       // Temporary variable
    temp = *a;                      // Store value of a
    *a = *b;                        // Assign value of b to a
    *b = temp;                      // Assign stored value to b
}

int main()                          // Main function
{
    int x = 5, y = 10;              // Initialize variables

    swap(&x, &y);                   // Pass addresses to function

    printf("x = %d\n", x);          // Print swapped value
    printf("y = %d\n", y);          // Print swapped value

    return 0;                       // End program
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Passing NULL instead of valid address
❌ Common Mistake: Forgetting & while passing

---

✅ Q63. What is Memory Leak?

📘 Explanation

Memory leak occurs when dynamically allocated memory is not freed.

It wastes heap memory and reduces performance.

---

💻 Program (Memory Leak Example)

#include <stdio.h>          // Standard input-output header
#include <stdlib.h>         // Required for malloc()

int main()                  // Main function
{
    int *ptr = (int*)malloc(sizeof(int));  // Allocate memory

    *ptr = 100;             // Assign value

    printf("%d\n", *ptr);   // Print value

    // free(ptr);           // Memory not freed → Memory leak

    return 0;               // Program ends but memory not released
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Continuous allocation causes crash
❌ Common Mistake: Forgetting free()

---

✅ Q64. Difference Between Stack and Heap Memory (Program Demo)

📘 Explanation

Stack:

• Automatic memory

• Fast

• Function variables

Heap:

• Dynamic memory

• Slower

• Manual management

---

💻 Program

#include <stdio.h>          // Standard input-output header
#include <stdlib.h>         // Required for malloc()

int main()                  // Main function
{
    int a = 10;             // Stack memory variable

    int *ptr = (int*)malloc(sizeof(int));  // Heap memory allocation
    *ptr = 20;              // Assign value to heap memory

    printf("Stack value: %d\n", a);        // Print stack variable
    printf("Heap value: %d\n", *ptr);      // Print heap variable

    free(ptr);              // Free heap memory

    return 0;               // End program
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Not freeing heap memory
❌ Common Mistake: Thinking heap auto-cleans

---

✅ Q65. What is Recursive Function? (Factorial Example)

📘 Explanation

Recursion is when a function calls itself.

Must have:
✔ Base condition
✔ Recursive call

---

💻 Program

#include <stdio.h>              // Standard input-output header

int factorial(int n)            // Recursive function
{
    if(n == 0 || n == 1)        // Base condition
        return 1;               // Return 1

    return n * factorial(n - 1);  // Recursive call
}

int main()                      // Main function
{
    int num = 5;                // Initialize number

    printf("Factorial: %d", factorial(num));  // Call function

    return 0;                   // End program
}

🧠 Time Complexity: O(n)
⚠️ Edge Case: Large n causes stack overflow
❌ Common Mistake: Missing base condition

---

✅ Q66. What is Segmentation Fault?

📘 Explanation

Segmentation fault occurs when a program accesses invalid memory.

Reasons:

• Dereferencing NULL

• Accessing freed memory

• Invalid pointer access

---

💻 Program Example

#include <stdio.h>      // Standard input-output header

int main()              // Main function
{
    int *ptr = NULL;    // Initialize pointer to NULL

    *ptr = 10;          // Invalid access → Segmentation fault

    return 0;           // Program will crash before this
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Accessing invalid memory
❌ Common Mistake: Not checking pointer before dereferencing

---

✅ Q67. What is Command Line Argument?

📘 Explanation

Command line arguments allow passing values while running program.

Syntax:

int main(int argc, char *argv[])

• argc → Argument count

• argv → Argument vector

---

💻 Program

#include <stdio.h>          // Standard input-output header

int main(int argc, char *argv[])  // Main with arguments
{
    printf("Number of arguments: %d\n", argc);  // Print count

    for(int i = 0; i < argc; i++)   // Loop through arguments
    {
        printf("Argument %d: %s\n", i, argv[i]);  // Print each argument
    }

    return 0;               // End program
}

🧠 Time Complexity: O(n)
⚠️ Edge Case: No arguments passed
❌ Common Mistake: Accessing argv without checking argc

---

✅ Q68. What is Function Pointer?

📘 Explanation

A function pointer stores the address of a function.

Used in:

• Callback functions

• Menu-driven programs

---

💻 Program

#include <stdio.h>              // Standard input-output header

int add(int a, int b)           // Normal function
{
    return a + b;               // Return sum
}

int main()                      // Main function
{
    int (*ptr)(int, int);       // Declare function pointer

    ptr = add;                  // Store function address

    printf("Sum: %d", ptr(5, 3));  // Call function using pointer

    return 0;                   // End program
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Incorrect function signature
❌ Common Mistake: Wrong pointer declaration syntax

---

✅ Q69. Program to Free Nested Dynamic Memory

📘 Explanation

When dynamic memory contains pointers inside structures, every allocated block must be freed.
This prevents memory leaks and dangling pointers.

---

💻 Program

#include <stdio.h>              // Standard input-output header
#include <stdlib.h>             // Required for malloc() and free()

struct Student                 // Structure with pointer member
{
    char *name;
    int marks;
};

int main()                      // Main function
{
    struct Student *s = (struct Student*)malloc(sizeof(struct Student)); // Allocate structure
    s->name = (char*)malloc(20 * sizeof(char));   // Allocate memory for name

    // Assign values
    s->marks = 90;
    snprintf(s->name, 20, "Krishna");             // Store string safely

    printf("Name: %s\n", s->name);               // Print name
    printf("Marks: %d\n", s->marks);            // Print marks

    free(s->name);      // Free inner pointer memory
    free(s);            // Free structure memory

    return 0;           // End program
}

🧠 Time Complexity: O(1)
⚠️ Edge Case: Forgetting to free inner pointer → memory leak
❌ Common Mistake: Freeing structure before inner pointers

---

✅ Q70. Program to Open File in Append Mode

📘 Explanation

File append mode "a" allows writing new data at the end of an existing file without overwriting it.

---

💻 Program

#include <stdio.h>              // Standard input-output header

int main()                      // Main function
{
    FILE *fp = fopen("data.txt", "a");  // Open file in append mode

    if(fp == NULL)                 // Check if file opened successfully
    {
        printf("File not opened\n");   // Error message
        return 1;                   // Exit program
    }

    fprintf(fp, "\nAdding new line"); // Write new line at end
    fclose(fp);                       // Close file

    printf("Data appended successfully\n");  // Confirmation

    return 0;                     // End program
}

🧠 Time Complexity: O(n)
⚠️ Edge Case: File permission issue
❌ Common Mistake: Using "w" instead of "a" overwrites file

---

🎯 Final Conclusion – Top 70 C Programming Viva Questions Series

Congratulations! You’ve completed the Top 70 C Programming Viva Questions series, covering all essential concepts from the basics to advanced topics.

Here’s what you’ve mastered in this series:

• Variables, Data Types, and Operators – Foundation of C programming

• Control Statements and Loops – Execution flow and logic

• Functions and Recursion – Modular and reusable code

• Arrays, Strings, and Pointers – Efficient memory handling and dynamic access

• Dynamic Memory Allocation – malloc, calloc, realloc, free, and memory management

• Structures and Unions – Organizing complex data

• File Handling – Persistent data storage

• Advanced Pointer Concepts – Double pointers, function pointers, NULL, dangling, and wild pointers

• Memory Concepts – Stack vs Heap, Memory Leak, Segmentation Fault

• Command Line Arguments – Making programs flexible and user-driven

⚡ Key Takeaways:

1. Pointers and dynamic memory are the backbone of advanced C programming.

2. Understanding memory management prevents crashes and improves performance.

3. Structures, unions, and file handling allow building real-world applications.

4. Recursion and function pointers are frequently asked in interviews.

5. Mastery of these 70 questions puts you ahead of most C learners and prepares you for technical interviews confidently.

✅ Pro Tip for Interviews:

• Always explain concepts clearly, give examples, and discuss time complexity.

• Highlight edge cases and common mistakes—it shows deep understanding.

By revising these questions and practicing the programs line by line, you are now fully equipped to tackle any C programming viva or coding interview.

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📌 Keep Learning. Keep Coding. Keep Growing.

✨ Written by Krishna Popat
🌱 Founder, Learning Growth Hub