Data Types: What are the different data types in C? How do you declare variables of different data types? What are the size and range of each data type? Operators: What are the different types of operators in C (arithmetic, relational, logical, bitwise)? How do you use these operators in expressions? What is the precedence and associativity of operators? Control Flow: How do you use if, else, and else if statements to make decisions? How do you use for, while, and do-while loops to repeat code? How do you use break and continue statements to control loop execution? Functions: What is a function in C? How do you define and call a function? What are function parameters and return values? What is the difference between local and global variables? Arrays: What is an array in C? How do you declare and initialize an array? How do you access elements of an array? How do you pass arrays to functions?