Practice C Programming Questions and Answers

• Which of the following is correct for a single-line comment in C++?
• In Python, what does len() function do?
• Which of the following is correct about C++ constructors?
• In Java, which data type is used to store true or false values?
• Which C operator is used to access a value at a memory address stored in a pointer?
• In Python, which of the following is used to create an anonymous function?
• Which of the following is true about C++ destructors?
• In C, which function is used to dynamically allocate memory?
• Which of the following statements is correct for Python lists?
• Which of the following algorithms is used for finding Minimum Spanning Tree?
• Which of the following is true about MergeSort?
• ch data structure is used in Depth-First Search (DFS)?
• Which algorithm is used to find the shortest path from a single source in graphs with negative weights?
• Which of the following sorting algorithms is stable?
• In Java, which method is used to start a thread?
• Which of the following is used to declare a list in Python?
• In C++, which feature allows hiding the internal details of a class?
• In C, what will be the output of the following code? int a = 5; printf("%d", a++);
• Which Java keyword is used to inherit a class?
• Which Python keyword is used to handle exceptions?
• 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...