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Interview Questions and Answers for 'Close' - 3 question(s) found - Order By Newest

Very frequently asked. Among first few questions in almost all interviews. Among Top 5 frequently asked questions. Frequently asked in Indian service companies (HCL,TCS,Infosys,Capgemini etc based on multiple feedback )
  Q1. Difference between == and .equals() ?Core Java
Anonymous
Ans. "equals" is the method of object class which is supposed to be overridden to check object equality, whereas "==" operator evaluate to see if the object handlers on the left and right are pointing to the same object in memory.

x.equals(y) means the references x and y are holding objects that are equal. x==y means that the references x and y have same object.

Sample code:

String x = new String("str");
String y = new String("str");

System.out.println(x == y); // prints false
System.out.println(x.equals(y)); // prints true

  Sample Code for equals

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   Like         Discuss         Correct / Improve     java   string comparison   string   object class   ==    equals   object equality  operator     Asked in 292 Companies      basic        frequent

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Related Questions

 What is the difference between = and == in Java ?
 How is == operator different for objects and primitive types ?
 What will be the output of following code

Integer x = 1;
Integer y = 2;
System.out.println(x == y);

What if you change 1 to "1" and Integer to String?


 Q2. Tell something about BufferedWriter ? What are flush() and close() used for ?
Admin
info@buggybread.com
Ans. BufferedWriter is temporary source for data storage.BufferedWriter is used to write character data to the file.Flush() is method available in B.W which ensures that all data items are written to file including last character.Close() is used to closes the character output stream.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   java io   input output   file handling   file io   output stream   bufferedwriter   flush   close


Related Questions

 How and when the Buffer is cleared when using Buffered Writer Classes ?
 Difference between save and flush in Hibernate ?
 Have you ever faced any problem because of PrintWriter buffer and autoflush mechanism ? How did you got rid of it ?
 Can we disable auto flushing for PrintWriter ?


 Q3. What is Closeable ?Core Java
Admin
info@buggybread.com
Ans. A Closeable is an interface which is a source or destination of data that can be closed.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     closeable   interfaces      intermediate        rare


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