PayPal Interview Experience | Set 11 Improve Improve Like Article Like Save Share Report Round 1: Write a program to find the subsets of an array ? Write a program to find the least ancestor node of a binary tree / bst ? Write a program to find the intersection between 2 arrays ? Write a program to evaluate a boolean expression i.e String s = “(a == b) || (b == c)” ? Round 2: Explain optional class in java 8 ? what is the default thread pool count in tomcat server ? How GWT works ? What is the difference between Kafka and IBM MQ or active MQ ? Last Updated : 10 Jan, 2019 Like Article Save Article Previous PayPal Interview Experience for Backend Java Developer (2.5+ Years Experienced) Next Cursors in PL/SQL Share your thoughts in the comments Add Your Comment Please Login to comment...