What test is when two or more modules or platforms are linked together and tested?

Which of the following is the correct statement to return a string from an array a of characters?

a. toString(a) b. new String(a) c. convertToString(a) d. String.toString(a)

Which one of the following statements is not true about red-black trees?

a. An AVL tree is better than a red-black tree with the same data for searching, inserting, and deleting operations b. In the average case, the complexity of inserting one member into a red-black tree is O(log(n)) c. In the average case, the complexity of searching for one member in a red-black tree is O(log(n)) d. A red-black tree is a binary search tree