Informatica Software Engineer Interview Questions and Answers

Round: Test
Experience: 55 questions in 60 minutes of which 45 were technical and 10 were aptitude questions and there was no negative marking. The technical questions covered RDBMS, UNIX, C, C++, Java, Operating systems, Data structures and Algorithms. The questions were simple and the basics of each of the mentioned subjects were mainly asked.
Duration: 60 minutes
Total Questions: 55

Round: Test
Experience: Again mainly questions on the subjects covered in round 1 but bit more in deep questions required short but detailed answers.
Tips: Learn to write pretty good Unix Scripts and Know the Basics of Operating System & OOP
Duration: 40 minutes
Total Questions: 10

Round: Technical Interview
Experience: Questions mainly on UNIX & RDBMS. Interviewer will ask you to write UNIX scripts and SQL/JAVA-SQL queries/programs for some use cases.
Tips: Know how JOINS, INTERSECTION, UNION & Aggregation works in SQL.

Round: Technical Interview
Experience: Questions on Programming, Data Structure and algorithms.
You will be asked to write pseudo-program for some of the use cases.
Tips: Choose your programming language cleverly. ;)

Round: Other Interview
Experience: Round 5 is an interview with Technical Manager.
Questions are asked based on the content of your resume like projects, hobbies and traits.
Few puzzle questions are asked which usually can be answered with logical analysis.
Tips: Be prepared for questions on the answer you give for the previous question(s).

Round: HR Interview
Experience: Again question will be asked on the basis of your resume. Questions may also asked on your previous interview experience if you have any.
Tips: Clear your doubts before leaving the room.

General Tips: Be confident, be straight forward, do not try to bluff with answers and try to be creative with answers. Prepare well both technical and aptitude.
Skills: Algorithms And Data Structures, Operating Systems, Unix, SQL, Java Programming, Object-Oriented Programming (OOP), C Programming
College Name: JSS Mahavidyapeetha Sri Jayachamarajendra College Of Engineering, Mysore
Motivation: Work Environment of Informatica.

Round: Test
Experience: Round 1: Online objective test.
There were questions from Operating Systems, C, Algorithms, Data Structures.

Round 2: Online and subjective (choose language C++ or JAVA). This round had 15 questions.
Data structures, C++ questions, Fibonacci optimisation, algorithms (DFS/BFS).

Round: Technical Interview
Experience: In the first round of interview they asked me questions about :1) My project (asked no. of classes and mention their responsibilities).
2) ACID properties of database and indexing in a database.

There were also questions related to OOPS concepts including polymorphism, composition, aggregation, inheritance, Abstract classes, interface; difference between usage of abstract class and interface, can abstract class be instantiated, how to access child class methods having reference of base class.
There was another question on run time and compile time binding and under which category do we classify method overloading and also questions on code for deleting the duplicate nodes in a sorted link list and printing root to leaf paths in a binary search tree.

Round: Technical Interview
Experience: This was the second round of the interview. They asked me the following questions,There is a tree (not binary) and all non-leaf nodes are RED in colour. Some leaf nodes are white in colour. If a node has all white coloured children then its colour can be changed into white. So we have to convert maximum number of nodes into white colour – write program for the same.
Code for checking whether a given binary tree balanced or not.
What are virtual functions, what is their role?
Questions related to virtual functions.

You are given the details of each transaction of each item i.e. item_name, quantity, price. So at the end of the day, you want top 50 items that have been sold. There are two cases:
In the first case you have fixed number of items.
In the second case very large number of items – so you need to decide what data structure to be used for this.

Round: Technical Interview
Experience: In the third round of the interview they asked questions like :
1) Types of tree traversals (breadth first and depth first (pre, post, in)
2) Determining width of binary tree i.e. using breadth wise traversal
3) Why files are preferred over databases?

College Name: IIT KANPUR