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Colan Infotech Data Engineer Interview Questions and Answers
Colan Infotech Data Engineer Interview Experiences
1 interview found
Anonymous
I applied via Naukri.com and was interviewed in Jan 2024. There were 2 interview rounds.
(5 Questions)
- Q1. Types of spark clusters, uses of all types of clusters
- Ans.
There are three types of Spark clusters: standalone, YARN, and Mesos. Each type has different use cases.
Standalone cluster: Suitable for development and testing purposes.
YARN cluster: Ideal for running Spark on Hadoop clusters.
Mesos cluster: Used for running Spark on Mesos clusters or in cloud environments.
Standalone cluster can be set up on a single machine or a group of machines.
YARN cluster leverages Hadoop's resour...
- Q2. Different types of optimization techniques
- Ans.
Optimization techniques are methods used to improve efficiency and performance of systems or processes.
Mathematical optimization: using mathematical models and algorithms to find the best solution
Heuristic optimization: using trial and error or rule-based methods to find good solutions
Metaheuristic optimization: using higher-level strategies to explore the search space efficiently
Constraint optimization: optimizing sol...
- Q3. Broadcast join usecase
- Q4. Stored procedure
- Q5. Sql - joins queries
(1 Question)
- Q1. Spark scenario based questions troubleshooting questions
Skills evaluated in this interview
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I applied via Campus Placement and was interviewed before Feb 2021. There were 3 interview rounds.
Aptitude round consists Logical reasoning, General Aptitude, Grammar related questions etc. All are moderate level questions.
(3 Questions)
- Q1. Explain OOPs w.r.t Java
- Ans.
OOPs is a programming paradigm that uses objects to represent real-world entities. Java is an OOPs language.
OOPs stands for Object-Oriented Programming System
Java is a class-based OOPs language
Encapsulation, Inheritance, Polymorphism, and Abstraction are the four pillars of OOPs
Objects have state and behavior
Java supports interfaces, which allow for multiple inheritance
Example: A car can be represented as an object wit...
- Q2. Explain about the projects that you have worked on
- Q3. Explain how Java solves machine dependency of code execution
- Ans.
Java solves machine dependency by using bytecode and virtual machine.
Java code is compiled into bytecode which is platform-independent
The bytecode is executed by the Java Virtual Machine (JVM) which is platform-specific
JVM translates bytecode into machine code for the specific platform
This allows Java code to run on any platform with a JVM installed
Example: A Java program compiled on Windows can run on Linux or Mac as
(2 Questions)
- Q1. Why should we hire you?
- Q2. Tell me about yourself.
Interview Preparation Tips
- Java
Skills evaluated in this interview
I applied via Campus Placement and was interviewed before May 2021. There were 2 interview rounds.
Numerical ability and logical reasoning followed by some coding mcqs
(1 Question)
- Q1. Print 1 to 100 without for loop
- Ans.
Printing 1 to 100 without for loop
Use recursion to print numbers from 1 to 99
Print 100 outside the recursion
Use a base case to stop recursion at 100
Interview Preparation Tips
I applied via Campus Placement and was interviewed before Jun 2021. There were 2 interview rounds.
Simple aptitude test
(1 Question)
- Q1. General questions as per your cv
Interview Preparation Tips
- Aptitude
I applied via Company Website and was interviewed before Jul 2021. There were 2 interview rounds.
Attended the codevita competition in final year of college.
(3 Questions)
- Q1. About College Project
- Q2. Some very basics of java
- Q3. Experience of college project as a team
Interview Preparation Tips
I applied via Campus Placement and was interviewed before Aug 2021. There were 2 interview rounds.
It was a basic aptitude test.
(1 Question)
- Q1. Interview was fine. Mostly asked about my final year project.
Interview Preparation Tips
I applied via Campus Placement and was interviewed before Jun 2021. There were 2 interview rounds.
(1 Question)
- Q1. Explain the mini projects and main project completed during Engineering.
Interview Preparation Tips
- DBMS
- Software Engineering
- Basic coding
Be confident and have a smiling face in the interview round.
I applied via Campus Placement and was interviewed before May 2021. There were 2 interview rounds.
- basic programming on C
(1 Question)
- Q1. - question based on your resume
Interview Preparation Tips
whatever project you are including , you should know enough to explain everything.
I applied via Campus Placement and was interviewed before Mar 2021. There were 2 interview rounds.
(5 Questions)
- Q1. If you cleared Aptitude and Coding, Mostly Interview will be cleared with some basics questions like OOPs concepts, sort functions kind of questions.
- Q2. Explain OOPs concept in JAVA?
- Ans.
OOPs concept in JAVA is a programming paradigm that focuses on objects and their interactions.
OOPs stands for Object-Oriented Programming
It involves the use of classes, objects, inheritance, polymorphism, and encapsulation
Classes are used to define objects and their properties
Objects are instances of classes that can interact with each other
Inheritance allows for the creation of new classes based on existing ones
Polymo...
- Q3. Function to sort an array in Java?
- Ans.
Java provides Arrays.sort() method to sort an array.
Use Arrays.sort() method to sort an array of strings.
The method sorts the elements in ascending order by default.
To sort in descending order, use Collections.reverseOrder() method.
- Q4. Tell me about yourself?
- Q5. Final year project which you worked on?
Interview Preparation Tips
Skills evaluated in this interview
I applied via Campus Placement and was interviewed before Oct 2021. There were 3 interview rounds.
English reasoning and logical question
(2 Questions)
- Q1. About self and hobbies
- Q2. About activities involved in
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