6. What does Files.lines(Path path) do?

1. 1. It counts the number of lines for files at the path specified

   
   
   

   2. It reads all the files at the path specified as a String

   
   
   

   3. It reads all the lines from a file as a Stream

   
   
   

   4. It reads the filenames at the path specified

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Files.lines(Path path) that reads all lines from a file as a Stream.

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7. What is Optional object used for?

1. 1. Optional is used to represent null with absent value

   
   
   

   2. Optional means it’s not mandatory for method to return object

   
   
   

   3. Optional is used for optional spring profile

   
   
   

   4. Optional is used for optional runtime argument

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Optional object is used to represent null with absent value. This class has various utility methods to facilitate code to handle values as ‘available’ or ‘not available’ instead of checking null values.

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8. Which of the following methods hits database always?

1. 1. loadDatabase()

   
   
   

   2. load()

   
   
   

   3. get()

   
   
   

   4. getDatabase()

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   get() method hits database always. Also, get() method does not return proxy object.

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9. Which of the following methods returns proxy object?

1. 1. get()

   
   
   

   2. loadDatabase()

   
   
   

   3. getDatabase()

   
   
   

   4. load()

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   load() method returns proxy object. load() method should be used if it is sure that instance exists.

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10. SessionFactory is a thread-safe object.

1. 1. True

   
   
   

   2. False

   
   
   

   3. NA

   
   
   

   4. NA

   
   
   

   5. NA

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   SessionFactory is a thread-safe object. Multiple threads can access it simultaneously.

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