Programming Tutorials

Question: What does the following code fragment print out at line 10?

By: Ash in Certification Tutorials on 2008-07-05  

Question: What does the following code fragment print out at line 10?

1. try{
2. FileOutputStream fos = new FileOutputStream("xx");
3. for (byte b=10; b<50; b++)
4. fos.write(b);
5. fos.close();
6. RandomAccessFile raf = new RandomAccessFile("xx","r");
7. raf.seek(10);
8. int i = raf.read();
9. raf.close();
10. System.out.println("i=" + i);
8. }
9. catch (IOException e) {}

A. The output is i = 30.

B. The output is i = 20.

C. The output is i = 10.

D. There is no output because the code throws an exception at line 1.

E. There is no output because the code throws an exception at line 6.

Answer:B is correct. All the code is perfectly legal, so no exceptions are thrown. The first byte in the file is 10, the next byte is 11, the next is 12 and so on. The byte at file position 10 is 20, so the output is i = 20.

 

 

 

 





Add Comment

* Required information
1000

Comments

No comments yet. Be the first!

Most Viewed Articles (in Certification )

Question: How can you force garbage collection of an object?

Question: What does the following code fragment print out at line 10?

Question: Which of the following statements are true about File? (Choose none, some , or all)

Sun Certified Enterprise Architect (SCEA) certification

Sun Certified Mobile Application Developer (SCMAD) Certification

Sun Certified Developer for Java Web Services (SCDJWS) Certification

Sun Certified Business Component Developer (SCBCD) Certification

Sun Certified Web Component Developer (SCWCD) Certification

Sun Certified Java Developer (SCJD) Certification

Sun Certified Java Programmer (SCJP) Certification

Question: Choose the valid identifiers from those listed below

Question: A signed data type has an equal number of non-zero positive and negative values available

Question: Find the right solution based on the provide code.

Question: How many bytes does the following code write to file destfile?

Question: It is possible to use the File class to list the contents of the current working directory.

Latest Articles (in Certification)

Sun Certified Enterprise Architect (SCEA) certification

Sun Certified Mobile Application Developer (SCMAD) Certification

Sun Certified Developer for Java Web Services (SCDJWS) Certification

Sun Certified Java Associate (SCJA) Certification

Sun Certified Business Component Developer (SCBCD) Certification

Sun Certified Web Component Developer (SCWCD) Certification

Sun Certified Java Developer (SCJD) Certification

Sun Certified Java Programmer (SCJP) Certification

Question: Which of the following statements are true about File? (Choose none, some , or all)

Question: Find the right solution based on the provide code.

Question: What does the following code fragment print out at line 10?

Question: How many bytes does the following code write to file destfile?

Question: It is possible to use the File class to list the contents of the current working directory.

Question: The File class contains a method that changes the current working directory.

Question: Readers have methods that can read and return floats and doubles. True or False?