C Programming Fundamentals

What are the basic data types in C?

• int8, int16, int32, int64, char8

• int, float, double, char, void

• byte, short, long, float, decimal

• string, boolean, list, map, set

Explain the purpose of control structures in C.

• The purpose of control structures in C is to manage the flow of execution in a program, enabling decision-making and repetition.

• The purpose of control structures in C is to define data types and structures.

• Control structures in C are used for memory management and optimization.

• Control structures in C help in organizing code into separate files and modules.

What is the scope of a variable in a function?

• The scope of a variable in a function is limited to the entire module.

• The scope of a variable in a function is shared across all functions.

• The scope of a variable in a function is global to the entire program.

• The scope of a variable in a function is local to that function.

How do you declare an array in C?

• char arr[10];

• int arr[10];

• double arr[10];

• float arr[10];

What is a pointer and how is it used in C?

• A pointer is a variable that holds the memory address of another variable, used for direct memory access and manipulation in C.

• A pointer is a type of function that executes code in C.

• A pointer is a constant value that cannot be changed in C.

• A pointer is a data structure that stores multiple variables in C.

Describe the process of file handling in C.

• Closing a file before writing to it

• Only using file names without paths for access

• Reading files without opening them first

• The process of file handling in C includes opening a file, performing read/write operations, and closing the file.

How do you perform basic input/output in C?

• Use 'cout' for output and 'cin' for input in C++.

• Employ 'write' for output and 'read' for input in C.

• Use 'printf' for output and 'scanf' for input in C.

• Utilize 'echo' for output and 'input' for input in C.

What is the difference between a variable and a constant?

• A variable has a defined value; a constant is undefined.

• A variable is always fixed; a constant can change.

• A variable can change its value; a constant cannot.

• A variable is a type of constant; a constant is a variable.

How does the if-else statement work in C?

• The if-else statement is a function that returns a boolean value.

• The if-else statement executes all code blocks regardless of conditions.

• The if-else statement allows conditional execution of code blocks based on the evaluation of a boolean expression.

• The if-else statement is used for looping through arrays in C.

What are the different types of loops available in C?

• for loop, while loop, do while loop

• loop for, loop while, loop do

• foreach loop, repeat loop, until loop

• for each loop, until loop, repeat until loop