Practice C Programming Questions and Answers

• In C++, which operator is used to access a member function through a pointer to an object?
• In C, which function is used to release dynamically allocated memory?
• Which of the following is true about Java interfaces?
• In Python, which method is used to convert a string to lowercase?
• Which of the following is a valid C++ constructor?
• In C, which keyword is used to define a constant value?
• In Java, which method is called when an object is garbage collected?
• Which Python statement is used to create an empty set?
• In C++, which access specifier allows members to be accessible only within the class?
• Consider a table Orders with columns OrderID, CustomerID, OrderDate, and TotalAmount. Which SQL query would correctly find the total number of orders and t...
• What will be the output of the following C code snippet? int a = 10; int *p = &a; *p = 20; printf("%d", a);
• Which storage class specifier in C allows a local variable to retain its value between successive function calls, while keeping its scope limited to the fu...
• What is the output of the following C code? #include int main() {     int i;     for (i = 0; i < 3; i++) {         printf("%d ", i);     }    ...
• What is the output of the following C++ code? #include     using namespace std; int main() {     int x = 5;     int &ref = x;     ref = 10;     ...
• Which C++ inheritance access specifier, when used to inherit a base class, causes all public and protected members of the base class to become private memb...
• What is the output of the following C code? int arr[5] = {10, 20, 30, 40, 50}; int *p = arr; printf("%d", *(p+2) + *(arr+3) - *(p+1));
• In C++, a base class pointer holds the address of a derived class object. The base class declares a non-virtual member function that the derived class rede...
• What is the output of the following C code? int x = 5, y = 2; printf("%d", x++ / y + x % y);
• What is a key difference between the malloc() and calloc() functions in C?
• Consider the following C structure on a typical 32-bit system, where int is 4 bytes, char is 1 byte, and the compiler applies default structure padding for...
• Consider the following C code:  int a[]={10,20,30,40};  int *p=a;  What is the value of *(p+2)?
• Why should a C++ base class destructor be virtual when deleting derived objects through base pointers?
• What is printed if we execute the following C code? int a=5;  int *p=&a;  (*p)++;  printf("%d",a); 
• In C,  int x=10;  printf("%d %d",x++,++x);  What is the most accurate statement?
• What is the output of the following C code? int arr[3][3] = {{1,2,3},{4,5,6},{7,8,9}}; printf("%d", *(*(arr+2)+1));
• What is the output of the following C code? int a = 12, b = 10; printf("%d", a & b | a ^ b);
• What is the output of the following Java code? try {     int[] arr = new int[3];     System.out.println(arr[5]); } catch (NullPointerException e) {   ...
• What is the output of the following C code? int arr[3][4] = {{1,2,3,4},{5,6,7,8},{9,10,11,12}}; printf("%d", *(*(arr+1)+2));
• What is the output of the following C code? void func(int n) {     if (n == 0) return;     printf("%d ", n);     func(n-1);     printf("%d ", n); }...
• What is the output of the following C++ program? ...
• Given the C structure 'struct Node { int data; struct Node *next; };' on a 64-bit system where int is 4 bytes and a pointer is 8 bytes, and assuming no pad...
• What is the output of the following recursive C function call? ...
• What is the output of the following C++ program using virtual functions? ...
• What will be printed by the following C code ? int x = 13, y = 6; printf("%d", (x & y) + (x | y) - (x ^ y));
• What is the output of the following C code? int x = 5; int y = x++ + ++x; printf("%d %d", x, y);
• In Object-Oriented Programming, which mechanism allows a subclass to provide its own specific implementation of a method that is already defined in its sup...
• Consider the C structure: struct A { char c; int i; }; On a typical system where int requires 4-byte alignment, what is the most likely total size of struc...
• In C, when an array is passed as a parameter to a function, what does sizeof(arr) typically return when evaluated inside that function?
• Which C++ keyword, when applied to a base class member function, enables runtime polymorphism by allowing that function to be overridden and correctly disp...
• What will be the output of the following C code: int a = 10, b = 3; printf("%d", a / b);