(67) How many key comparisons occur in searching for key 35 in the given hash table? (2分)  
　　 A) 0 B) 1 C) 2 D) 3  
　　  
　　(68)&  If a new key 67 is inserted into the given hash table, what will be its address? (2分)  
　　 A) 3 B) 4 C) 5 D) 6  
　　  
　　(69) Suppose the contents of the DOS IF1.BAT file on the hard disk is as follows.  
　　 @ECHO OFF  
　　 MEM>FILE1  
　　 SORTFILE2  
　　 DEL FILE1  
　　 @DATE  
　　 @TIME  
　　 IF EXIST %1 ECHO % IF FOUND  
　　 If all of the commands are successfully executed after IF1 FILE1 is  
　　 typed, then the screen displays?  
　　 A) None B) Date and time C) FILE1 IS FOUND D) FILE2 IS FOUND  
　　  
　　(70) If the files in the current directory are  
　　 aac, abc, acb,acc, aca, ao, al, a2, ab, ac, aa,  
　　 and the command ls a?[bc] is executed, how many files will be listed?  
　　 (2分)  
　　 A) 3 B) 4 C) 5 D) 6  
　　  
　　(71) In order to append a standard output to an existing file, which of the following operators is used in the UNIX system?  
　　 A) | B) & C) > D) >>  
　　  
　　(72) Consider the following figure, where the shaded parts represent already assigned blocks of memory,  and the unshaded parts represent free blocks. (2分)  If there is a request for 40KB of memory and the best-fit algorithm is used, then the beginning address of memory that is allocated in response to the request is  
　　 A) 100KB B) 190KB C) 330KB D) 410KB  
　　  
　　(73)  On a certain disk, there are 200 tracks, numbered 0-199, the current position of the disk head is track 53. If the shortest-seek-time-first scheduling algorithm is used when the tracks  
　　 98, 183, 37, 122, 14, 124, 65, 67  
　　 are requested, then the head-moving sequence that results will be (2分)  
　　 A) 65, 67, 37, 14, 98, 122, 124, 183  
　　 B) 65, 67, 37, 98, 122, 124, 183, 14  
　　 C) 65, 67, 98, 122, 124, 183, 37, 14  
　　 D) 98, 183, 37, 122, 14, 124, 65, 67  
　　  
　　(74) Whant operation on relations R and S produces the relation shown below?  
　　 {tuple│tuple∈R۸tuple∈\ S}  
　　 A) Union B) Difference C) Intersection D) Division  
　　  
　　(75) When embedding SQL in a C language program, the prefix that should be added   to all SQL statements in order to distinguish SQL statements from the host language statements is  
　　 A) ： B) EXEC C) EXEC SQL D) SQL  
　　  
　　(76) In the ORACLE system,sets of SQL statements and control flow statements that have been named,compiled,and stored tn the database are referred to as stored