How big is a gigabyte?
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if num=687; U have to get num=6+8+7;
Why do we need singleton class?
Is java util regex pattern thread safe?
Given a singly linked list, find the middle of the list in a single traversal without using temporary variable.
what is the output ? Math.floor(-2.1) a)2 b)-2 c)-3.0 d)0
What does \ mean in regex?
What occurs when an object is constructed?
What is nested loop? What is dangling else condition in it?
Write the algorithm to check the number non-leaf nodes in a tree.
Is upper case in java?
There can be a abstract class without abstract methods, but what is the need to declare a class abstract if it doesn't contain abstract methods?
What is tree node in java?