How tough are the IO and AWT questions?

[Paulo Silveira]

Hi guys
I am taking the exam next monday.
I am really prepared.... but sometimes I get scared about some questions that appear on mock exams...
IO and AWT... how are the questions? In some Mocks, I see MANY API questions, like if a RandomAcessFile can delete the file that it is referencing (can not) and how is the hierarchy of some IOs, if objectinputstream implements interface A or subclass class B...

are these kinda question for real?
I dont like these.
What about StringBuffer? I ve seen also for the String class, if the .substring(int) method returns the right part or left part.
Does anyone hae a good mock that really represents IO and AWT?
thanks a lot

[Jamal Hasanov]

Hi,
Types of questions on I/O:
-"r","rw" parameter in RandomAccessFile() constructor
-InputStreamReader/OutputStreamWriter
-write() method of InputStream.
-methods of Reader/Writer
-methods of DataInput/DataOutput
-You had to know what happens(a.txt is created or not) when you call this constructors:
FileOutputStream("a.txt");
File("a.txt");
RandomAccessFile("a.txt","rw");
-You must know that, RandomAccessFile's write() method writes to the beginning of file,FileOutputStream in 'append' mode writes to the end of file.
About I/O you can read in Khalid Mughal's chapter 18(you can download it)-this chapter describes what you need for exam.
http://www.ii.uib.no/~khalid/pgjc/jcbook/sample-chapters.html
Other sources:
Velmurugan's Notes
http://www.geocities.com/velmurugan_p/
My SCJP Notes
http://www.j-think.com/jNotes.htm
Jamal Hasanov
www.j-think.com

[luco zhao]

-write() method of InputStream.

write()?
read(), right?

[Jamal Hasanov]

Sorry, I meant OutputStream
Jamal

[Raj Hans]

Originally posted by Paulo Silveira:
Hi guys
I am taking the exam next monday.
I am really prepared.... but sometimes I get scared about some questions that appear on mock exams...
IO and AWT... how are the questions? In some Mocks, I see MANY API questions, like if a RandomAcessFile can delete the file that it is referencing (can not) and how is the hierarchy of some IOs, if objectinputstream implements interface A or subclass class B...

are these kinda question for real?
I dont like these.
What about StringBuffer? I ve seen also for the String class, if the .substring(int) method returns the right part or left part.
Does anyone hae a good mock that really represents IO and AWT?
thanks a lot

Kind of Questions that I came across during my exam..
I/O:
1. Constructor for FileInputStream?
2. Valid access options for RandomAcessFile?
3. Can BufferedInputStream be constructed using FileName?
AWT:
1. Use of CheckGroup?
2. Clipping Region of a Component?
HTH

[Paulo Silveira]

really really thanks!
thats great