Answer / ravikiran(aptech mumbai)

collections api contains group of classes and interfaces and
methods that deal with insertion,deletion and retrieval of
objects from a particular collection

can u give one sinario when you use Abstract Class and When you use Interface.

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What are library required to connect to excel sheet.

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How does linkedhashmap work in java?

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What is the difference between form & report?

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Can you sort a list in java?

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What is arraylist class in java?

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How do I compare two strings in word in java?

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How many types of methods are there?

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What are access specifiers in java ?

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What is the difference between a synchronized method and a synchronized block?

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public class BatchTest { public static void main(String[] args) { Runtime run = Runtime.getRuntime(); try { Process p = run.exec("cmd start /c D:/test.bat"); System.out.println(p.exitValue()); } catch (Exception e) { e.printStackTrace(); } System.out.println("FINISHED"); } }

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what is the use of abstract class and interface with example?

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