6. Constructing a binary search tree -- based on the un-balanced BST algorithms covered in class -- from inserting the values 5, 2, 9, 6, 3, 8, 1 in that order. In what order are the values visited in a preorder traversal of the resulting tree? A. 9,8,6,5,3,2,1 B. 5,3,2,1,9,8,6 C. 3,5,2,9,1,8,6 D. 5,2,1,3,9,6,8

The resulting binary search tree from inserting the values 5, 2, 9, 6, 3, 8, 1 in that order is:

     5
   /   \
  2     9
 / \   /
1   3 6
     \
      8

The order of values visited in a preorder traversal of the resulting tree is:

5, 2, 1, 3, 9, 6, 8

So, the correct answer is D.

相关问题

nthread = 0 nthreadpair = 0 nthreadtb = 0 ppenalty_ex = 0 stacksize: 8192 kb generating a scoring matrix for nucleotide (dist=200) ... done Gap Penalty = -1.53, +0.00, +0.00 Making a distance matrix .. There are 2627 ambiguous characters. 1501 / 1553 done. Constructing a UPGMA tree (efffree=0) ... 1550 / 1553 done. Progressive alignment 1/2... STEP 801 / 1552 f Reallocating..done. *alloclen = 32159 STEP 1001 / 1552 f

这段输出看起来是一个程序在运行时输出的信息。根据输出内容可以看出，程序正在进行一系列操作，包括生成核苷酸的评分矩阵（即计算不同核苷酸之间的匹配得分）、构建UPGMA（Unweighted Pair Group Method with Arithmetic Mean）树、以及进行渐进比对（Progressive Alignment）等步骤。

其中，生成评分矩阵是进行序列比对的基础，UPGMA树则是用来构建序列之间的进化关系，而渐进比对是一种常用的序列比对算法，可以有效地处理多个序列之间的差异。具体的参数和运行过程需要根据程序的具体实现来解释。

23/05/31 22:28:48 WARN BlockReaderFactory: I/O error constructing remote block reader. java.io.IOException: Got error, status message opReadBlock BP-1569217759-192.168.100.101-1685011952795:blk_1073741834_1010 received exception org.apache.hadoop.hdfs.server.datanode.ReplicaNotFoundException: Replica not found for BP-1569217759-192.168.100.101-1685011952795:blk_1073741834_1010, for OP_READ_BLOCK, self=/192.168.100.1:64373, remote=/192.168.100.101:9866, for file /hive/warehouse/user_project.db/mediamatch_userevent/mediamatch_userevent.csv, for pool BP-1569217759-192.168.100.101-1685011952795 block 1073741834_1010

这是一个 Java IO 异常，可能是由于读取远程块数据时发生了错误。错误信息显示 ReplicaNotFoundException，可能是因为找不到所需的块副本。这个错误是在尝试读取文件 /hive/warehouse/user_project.db/mediamatch_userevent/mediamatch_userevent.csv 时发生的。该文件属于 pool BP-1569217759-192.168.100.101-1685011952795，块编号为 1073741834_1010。