Informatica Software Developer Engineer interview questions

Round 2 Q1. A string related problem solving question. straight forward solution by using StingBuilder. Knowledge on String immutability, string pool, etc was also tested Q2. Threading related: There has to be 5 threads running. Each thread need to start the printing of number based on the user given number (and continue to print in an incremental manner). The number could be printed in a mixed manner Q3. Questions on Java Collections. ○ What are and How do HashMap and HashSet work? ○ When to use an ArrayList, Vector, LinkedList? When to use ArrayList over a HashSet or vice-versa?

Round 3: The round started with usual introductions. Followed by a bit more detailed explanation on the project that I will be working on. • Some basic questions on Java collections • A scenario-based question: ○ Assume there are two processes/threads, whose objectives are as follows: § Process 1: to continuously read incoming data and save it (no DB) § Process 2: Interacts with the user and whenever the user wants to view the data, it will need to provide all the info collected by Process1 in a sorted order ○ For simplicity, it was taken that only integers flowed in as input. And the incoming data will be so huge that the java heap memory ll surely overflow