Differentiate between indexed and associative arrays in PHP.
Indexed arrays use numbers as index values. Associative arrays are defined with key=>value pairs where keys act as the indexes. The keys can be either numbers or strings. ie) Associative arrays can also use strings as index values.
What is the use of the final keyword in Java?
1) A variable declaration preceded by the final keyword means the value assigned to the variable is final and it cannot be changed. Treats the variable as a constant. 2) A method declared with final as the first keyword means the method cannot be overridden further. 3) A class declared with final keyword means the class cannot be derived.
What is the return type of the main() function in C?
All functions except those return an integer result must specify a return type in the function header. The main() function returns an integer value to show the successful execution or abnormal termination of the function. A zero value is returned for successful execution.