QUESTION 18 Stacks can be implemented using Ques Huffman Coding Trees Arrays or linked lists Heaps QUESTION 19 In a binary tree, how many children does each node have? As many as required A logrithmic function of the depth of the tree Two One QUESTION 20 In a binary tree, how many children does a leaf node have? A logrithmic function of the number nodes in its subtrees 2 to the nth power, minus one Zero Two Click Save and Submit to save and submit. Click Save All Answers to save all answers