Java Developer

Hashing can be used to solve this problem. 
Use a hash map data structure to store the occurrence of each word in the string.
Traverse the string and for each element, check whether it is present in the map or not. If it is present, then update the frequency of the current word else insert the word with frequency 1.
Traverse in the map and print the frequency of each word.

1) Comparable provides a single sorting sequence. In other words, we can sort the collection on the basis of a single element such as id, name, and price. The Comparator provides multiple sorting sequences. In other words, we can sort the collection on the basis of multiple elements such as id, name, and price etc.
2) Comparable affects the original class, i.e., the actual class is modified. Comparator doesn't affect the original class, i.e., the actual class is not modified.
3) Comparable provides compareTo() method to sort elements. Comparator provides compare() method to sort elements.
4) Comparable is present in java.lang package. A Comparator is present in the java.util package.
5) We can sort the list elements of Comparable type by Collections.sort(List) method. We can sort the list elements of Comparator type by Collections.sort(List, Comparator) method.

Advantages of Java Multithreading : 
1) It doesn't block the user because threads are independent and you can perform multiple operations at the same time.
2) You can perform many operations together, so it saves time.
3) Threads are independent, so it doesn't affect other threads if an exception occurs in a single thread.

1) AWS charges you on an hourly basis but Azure has a pricing model of per minute charge.

2) In terms of short term subscriptions, Azure has more flexibility but it is more expensive. Azure has a much better hybrid cloud support in comparison with AWS.
 

3) AWS provides direct connections whereas Azure express provides routing.
 

4) Although Azure is convenient in terms of set-up for Windows admin, AWS is highly configurable and feature-enriched.
 

5) In terms of flexibility, adaptability to the open-source community AWS seems to be leading. It also gets an additional point when it comes to revenue generation.

Consider 2 buckets one 4L and other 9L. : Bucket 1 (4L) and Bucket2 (9L)
First fill the 9L bucket fully. : 0 L and 9 L
Pour the water into 4L bucket. : 4 L and 5 L
Empty the 4L bucket. : 0 L and 5 L
Repeat this twice. : 4 L and 1 L
Now you will left with 1L water in the 9L bucket : 0 L and 1 L
Now pour this 1L into the 4L bucket : 1 L and 0 L
Refill the 9L bucket. : 1 L and 9 L
Now pour the water from 9L into the 4L bucket until it fills up. : 4 L and 6 L
Now you are left with 6 L water in the 9L bucket.

Tip 1 : The cross questioning can go intense some time, think before you speak.

Tip 2 : Be open minded and answer whatever you are thinking, in these rounds I feel it is important to have opinion.

Tip 3 : Context of questions can be switched, pay attention to the details. It is okay to ask questions in these round, like what are the projects currently the company is investing, which team you are mentoring. How all is the work environment etc.