I. Which of the following statements about characters and strings in C and Java are true?

1. A string in C takes about half the memory as the same string in Java.

2. Strings are just an informal name for single-dimension arrays of characters in C and Java.

3. Strings in C and Java use null (0) to mark the end of a string.

4. Operations on strings, like length, are faster in C than in Java.

II. Which type of variable that can contain 1,000,000,000ten takes the most memory space?

1. int in C 

2. string in C 

3. string in Java