C Programming Challenge for Students

What are the basic data types available in C?

• int, float, double, char, void

• string

• array

• boolean

How do you declare a variable in C?

• declare int x;

• int x = 5;

• var x int;

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

What is the purpose of the 'if' statement in C?

• To execute code conditionally based on a boolean expression.

• To declare variables in C.

• To define a function in C.

• To create loops in C.

Explain the use of 'switch' statements in C.

• The 'switch' statement is used to declare variables in C.

• The 'switch' statement is used for looping through arrays in C.

• The 'switch' statement is used for selecting one of many code blocks to execute based on the value of an expression.

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

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

• A function in C is a block of code that performs a specific task, defined with a return type, name, parameters, and a body.

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

• 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 how does it work in C?

• Recursion in C is a method where a function calls itself to solve smaller instances of a problem, using base cases to terminate the calls.

• Recursion in C is a way to optimize memory usage by avoiding function calls.

• Recursion in C is a technique that uses loops to repeat function calls.

• Recursion in C is a method where a function runs in parallel to improve performance.

What is a pointer in C? How do you declare one?

• You declare a pointer using the syntax: pointerName *type;

• Pointers can only point to integer variables.

• A pointer in C is a variable that holds the address of another variable. It is declared using the syntax: type *pointerName;

• A pointer in C is a type of function.

Explain the concept of dynamic memory allocation in C.

• Dynamic memory allocation in C is the process of allocating memory using only the stack.

• Memory allocation in C is only possible using global variables.

• Dynamic memory allocation in C is the process of allocating memory during program execution using functions like malloc and free.

• Dynamic memory allocation in C is done at compile time using static arrays.

How do you declare and initialize an array in C?

• int arr = {1, 2, 3, 4, 5};

• array int arr[5] = new int[5];

• int arr[5] = {1, 2, 3, 4, 5};

• int arr[5] = (1, 2, 3, 4, 5);

What is the difference between an array and a string in C?

• An array is a collection of elements of the same type, while a string is a character array terminated by a null character.

• An array can only store integers, while a string can store any data type.

• An array is a single character, while a string is a collection of numbers.

• A string is a fixed-size data structure, while an array can change size dynamically.