Here are the solutions to the multiple-choice questions: 9. Function Declaration tells the compiler about the function name, return types and parameters types. A function declaration (also known as a prototype) provides the compiler with essential information about a function, including its name, return type, and the types and order of its parameters. This allows the compiler to check for correct usage of the function before its actual definition* (implementation) is encountered. The correct option is a)*. 10. "For" loop expression has three parts. A standard for loop in many programming languages (like C++, Java) consists of three main expressions separated by semicolons: 1. Initialization: Executed once at the beginning of the loop. 2. Condition: Evaluated before each iteration; if true, the loop continues. 3. Increment/Decrement: Executed after each iteration. The correct option is c)*. 11. Which operator add the first operand to the second operand and gives the result to first operand. The += operator is a compound assignment operator. It adds the value of the second operand to the first operand and then assigns the result back to the first operand. For example, x += y is equivalent to x = x + y. The correct option is b)*. 12. Integer reserves 4 bytes in memory: The size of an int data type can vary depending on the compiler and the system architecture (e.g., 16-bit, 32-bit, 64-bit). However, on most modern 32-bit and 64-bit systems, an int typically occupies 4 bytes (32 bits) of memory. The correct option is b)*.