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

By: Ash Viewed: 153281 times  Printer Friendly Format    


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.

 

 

 

 


Most Viewed Articles (in Certification )

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

Question: Execute the following code in an empty directory. What is the result?

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

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

Sun Certified Java Developer (SCJD) Certification

Sun Certified Java Programmer (SCJP) Certification

Question: Which of the following signatures are valid for the main() method entry point of an application?

Sun Certified Java Associate (SCJA) Certification

Question: Which of the following statements are true about UTF and Unicode?

Question: If all three top-level elements occur in a source file, they must appear in which order?

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

Question: Consider the following line of code: int x[] = new int[25];

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

Getting started with Java Certification. (SCJA, SCJP,...SCEA)

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

Latest Articles (in Certification)

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

Question: Execute the following code in an empty directory. What is the result?

Question: What is result of attempting to compile and execute the code below:

Getting started with Java Certification. (SCJA, SCJP,...SCEA)

Sun Certified Java Associate (SCJA) Certification

Question: Consider the following application: what value is printed at line 6?

Question: Consider the following application: what value is printed at line 6?

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

Question: What is the range of values that can be assigned to a variable of type short?

Question: What is the range of values that can be assigned to a variable of type byte?

Question: Which of the following statements are true about UTF and Unicode?

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

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

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

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

Comment on this tutorial

Subscribe to Tutorials

Related Tutorials

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

Question: Execute the following code in an empty directory. What is the result?

Question: What is result of attempting to compile and execute the code below:

Getting started with Java Certification. (SCJA, SCJP,...SCEA)

Sun Certified Java Associate (SCJA) Certification

Question: Consider the following application: what value is printed at line 6?

Question: Consider the following application: what value is printed at line 6?

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

Question: What is the range of values that can be assigned to a variable of type short?

Question: What is the range of values that can be assigned to a variable of type byte?

Question: Which of the following statements are true about UTF and Unicode?

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

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

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

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

Archived Comments