C Programming Challenge

What are the basic data types in C?

• string

• int, float, double, char, void

• boolean

• array

How do you declare a variable in C?

• var x int;

• declare int x;

• int x = new;

• To declare a variable in C, use the syntax: type variable_name; e.g., int x;.

What is the purpose of the 'if' statement?

• To declare a function.

• To control the flow of execution based on conditions.

• To create a loop for iteration.

• To define a variable's value.

Explain the use of 'switch' in control structures.

• The 'switch' statement is used to create loops in programming.

• The 'switch' statement is a type of function that returns values.

• The 'switch' statement can only evaluate boolean expressions.

• The 'switch' statement is used to simplify multiple conditional checks by evaluating a variable against several cases.

What is a function in C and how is it defined?

• A function in C is a keyword that defines a data structure.

• A function in C is a block of code defined with a return type, name, and parameters, used to perform specific tasks.

• A function in C is a variable that stores data.

• A function in C is a type of loop used for iteration.

What is recursion and provide an example?

• Recursion is a technique used to create user interfaces.

• An example of recursion is finding the maximum value in an array.

• An example of recursion is the calculation of the factorial of a number n, defined as n! = n * (n-1)! with the base case 0! = 1.

• Recursion is a method of sorting an array of numbers.

How do pointers work in C?

• Pointers in C cannot be used to manipulate arrays.

• Pointers in C automatically manage memory allocation without user intervention.

• Pointers in C are used to store string literals only.

• Pointers in C are variables that hold memory addresses, allowing for direct memory access and manipulation.

What is the difference between a pointer and a regular variable?

• A pointer holds a value, while a regular variable holds a memory address.

• A pointer holds a memory address, whereas a regular variable holds a value.

• A pointer is a type of regular variable.

• A pointer can only point to integers, while regular variables can hold any type.

How do you dynamically allocate memory in C?

• Use malloc(), calloc(), realloc(), and free() functions.

• Use printf() to allocate memory.

• Use strcpy() for dynamic memory allocation.

• Use free() to allocate memory.

What is an array and how is it declared in C?

• To declare an array in C, use the syntax: arrayName[size] type; e.g., numbers[10] int;

• To declare an array in C, use the syntax: type arrayName[size]; e.g., int numbers[10];

• An array in C is declared using the syntax: type[size] arrayName; e.g., int[10] numbers;

• An array is a single variable that can hold multiple values of different types.