51. Which jar provides FileUtils which contains methods for file operations?

1. 1. dir

   
   
   

   2. file

   
   
   

   3. apache commons

   
   
   

   4. file commons

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   FileUtils is a part of apache commons which provides various methods for file operations like writeStringToFile.

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52. Which feature of java 7 allows to not explicitly close IO resource?

1. 1. IOException

   
   
   

   2. AutoCloseable

   
   
   

   3. Streams

   
   
   

   4. try catch finally

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   Any class that has implemented Autocloseable releases the I/O resources.

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53. Which of these methods is used to write() into a file?

1. 1. writeFile()

   
   
   

   2. write()

   
   
   

   3. putFile()

   
   
   

   4. put()

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   write()

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54. Which of these exception is thrown by close() and read() methods?

1. 1. FileInputOutputException

   
   
   

   2. FileNotFoundException

   
   
   

   3. FileException

   
   
   

   4. IOException

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Both close() and read() method throw IOException.

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55. Which of these values is returned by read() method is end of file (EOF) is encountered?

1. 1. -1

   
   
   

   2. 1

   
   
   

   3. 0

   
   
   

   4. Null

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Each time read() is called, it reads a single byte from the file and returns the byte as an integer value. read() returns -1 when the end of the file is encountered.

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