國立暨南國際大學 102 學年度第一學期小考試卷

1. (10%) Determine whether the following code is correct or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
   
   # String slicing
   first = "John"
   last  = "Rambo"
   username = first[0] + last[:7]
   print(username, username.lower(), sep='\n' )
   
   
   
   
2. (10%) Determine whether the following code is correct or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
   
   # Splitting a list
   list1 = "ABC,ABC,ABC".split(",")
   list2 = "ABCABCABC".split("B")
   print( len(list1), list1[1] )
   print( len(list2), list2[2] )
   
   
   
   
3. (10%) Determine whether the following code is correct or not.  If it is correct, predict its output.  If it is incorrect, point out the mistake(s).
   
   # Caesar Cipher
   # chr('A') == 65
   # chr('Z') == 90
   
   plaintext  = "BOX"
   ciphertext = ""
   key = 3
   
   for ch in plaintext:
       c = chr( ( ord(ch) - 65 + key ) % 26 + 65 )
       ciphertext = ciphertext + c
   print(ciphertext)