How will you calculate the depth of a binary tree if the tree contains 15 nodes?
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Make a data structure and implement an algorithm to print all the files in a directory. (The root directory can have sub-directories too.)
What are the three types of design patterns?
Why for each loop is used?
What is meant by stack and queue?
What does system.gc() and runtime.gc() methods do?
Explain Public static void main?
What does singleton class mean?
what is difference between perfom() & excute() ?
How does callback work in java?
In how many ways we can create threads in java?
Difference between static methods, static variables, and static classes in Java.
WAP to illustrate the use of interface