I applied through an employee referral. The process took 1+ week. I interviewed at Informatica (Bengaluru) in June 2021
Interview
I had 3 technical rounds and 1 HR round.
I attended the interview in June-2021. The process was well defined and the process was neat and smooth.
I was given proper feedback after the interview.
The whole process took not more than 2weeks
Interview questions [3]
Question 1
Round 1:
Q1. Given a tree's root node as input, return a List<List<Integer>>, of the leaf nodes.
Example input:
root (1) --> leftnode (2)
root (1) --> rightnode (3)
node (2) --> leftnode (4)
node (2) --> rightnode (5)
node (3) --> leftnode (6)
Expected output:
4 5 6
2 3
1
Q2. Given a string of alphabets along with the special character "#". "#" represents a backspace action.
For the given input string return the resultant output after performing the backspace actions as needed.
Examples:
INPUT: A#B
OUTPUT: B
INPUT #
OUTPUT
INPUT A##
OUTPUT
INPUT ABC#
OUTPUT AB
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
It was an on campus drive, actually good.it was about 4 rounds ,1st tech apti round,second tech interview,next also tech interview then hr interview . All these process where offline
5 round of interview with 2-3 level of technical interview,
5 round of interview with 2-3 level of technical interview,
5 round of interview with 2-3 level of technical interview
I applied through a staffing agency. The process took 1 week. I interviewed at Informatica (Bengaluru) in May 2025
Interview
I have appeared two rounds, one online and one in-office, receiving and interview procedure were smooth and office staff were polite. Got offer almost immediately after interview concluded. Great interview
Interview questions [1]
Question 1
Performance improvements and any scenario I faced to improve performance