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Sun Guoqiao's Mock Exam doubt

 
Greenhorn
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What is the difference between the File and
RandomAccessFile classes?
(Select three correct answers)
A: The File class encapsulates the files and directories of the local file system.
B: The File and RandomAccessFile can be chained together in order to manipulate some files.
C: The RandomAccessFile class provides the methods needed to directly access data contained in any part of a file.
D: The File deals with byte while RandomAccessFile deals with char of the target file.
I did not understand how point A (that was a prt of the answer) could be the difference between File and RandomAccessFile classes???
Both of them encapsulates the files and directories of the local file system, nah ???
 
Ranch Hand
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Both of them encapsulates the files and directories of the local file system, nah ???


RandomAcessFile's constructors will throw FileNotFoundException if the argument passed in is a directory.

Also the phrase is not very accurate. "encapsulates" seems to refer to the fact that an object holds a field of another object, controlling access to it. A better word is "abstracts". I would say: A File object represents an abstraction of a file or directory pathname. And It does so in a machine independent way.
Regarding RandomAccessFile abstracts nothing. Its purpose is to access the content of a file not sequentially. However File does not deal with contents at all.
 
Ranch Hand
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The structure of the question is also somewhat
suspect - picking 3 out 4 correct. You get
a 25% chance of being correct by random
selection.
Questions that have 3 correct answer choices
will typically have a larger answer selection
list ( at least 5, typically 6 or more ).
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Preety Narashimhan
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yeh was kinda confused with the wordings ...
Thanks a lot folks even the site turned out to be helpful !!!
 
Ranch Hand
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Could you give me the URL?
 
Preety Narashimhan
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this is the URL
www.jiris.com/mockexam
all the 3 mock exams ..
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