What does exclamation mean in java?
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What is argument in java?
Difference between Map & Hashmap
How would you convert bytes to string?
Similarity and difference between static block and static method ?
What is data type modifier?
What is the final class modifier?
What is string data?
When should I use stringbuffer?
import java.io.*; class Demo { public static void main(String args[]) { File f=new File("1234.msg"); String arr[]=f.list(); System.out.println(arr.length); } }
Differentiate between postfix and prefix operators in java.
What are the two categories of data types in the java programming language?
How will you calculate the depth of a binary tree if the tree contains 15 nodes?