PayPal Interview Experience | Set 11

Round 1:
1. Write a program to find the subsets of an array ?
2. Write a program to find the least ancestor node of a binary tree / bst ?
3. Write a program to find the intersection between 2 arrays ?
4. Write a program to evaluate a boolean expression i.e String s = “(a == b) || (b == c)” ?

Round 2:

1. Explain optional class in java 8 ?
2. what is the default thread pool count in tomcat server ?
3. How GWT works ?
4. What is the difference between Kafka and IBM MQ or active MQ ?

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