Mastering C Programming Concepts

What are the basic data types available in C?

• boolean

• string

• array

• int, float, double, char, void

How do you declare a function in C?

• function(parameter_type1, parameter_type2) return_type;

• function_name return_type(parameter_type1, parameter_type2);

• return_type function_name(parameter_type1 parameter_name1, parameter_type2 parameter_name2, ...);

• return_type function_name(parameter_type1, parameter_type2)

What is recursion in C programming?

• Recursion is a method to declare global variables in C.

• Recursion is a method where a function calls itself to solve a problem.

• Recursion is a technique to optimize memory usage.

• Recursion is when a function runs in a loop until a condition is met.

Explain the difference between int and float data types.

• int can store decimal values; float cannot.

• int is for whole numbers; float is for numbers with decimals.

• int is used for text data; float is for numeric data.

• int is a larger data type than float.

What is a pointer in C?

• A pointer is a special kind of loop in C.

• A pointer is a variable that holds the address of another variable in C.

• A pointer is a type of function in C.

• A pointer is a variable that stores a string in C.

How do you pass a pointer to a function?

• Use a global variable instead of a pointer.

• Define the function parameter as a pointer type and pass the variable's address.

• Pass the variable directly without using its address.

• Declare the function without any parameters.

What is the purpose of the 'return' statement in a function?

• To define the function's parameters.

• To end the function execution immediately.

• To create a loop within the function.

• The purpose of the 'return' statement is to provide a value from a function to its caller.

How do you allocate memory dynamically in C?

• Use 'malloc', 'calloc', or 'realloc' functions.

• Use 'printf' to allocate memory.

• Use 'free' to allocate memory.

• Use 'new' operator for memory allocation.

What is the significance of the 'void' data type?

• The 'void' data type allows multiple return values from a function.

• The 'void' data type is a placeholder for future data types.

• The 'void' data type indicates no return value from a function.

• The 'void' data type is used for integer values.

Explain how to use the 'sizeof' operator in C.

• Use 'sizeof' only with constants.

• 'sizeof' can be used to allocate memory directly.

• 'sizeof' returns the size of a variable's value.

• Use 'sizeof(type)' or 'sizeof(variable)' to get the size in bytes.