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Happiest Minds Technologies
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I applied via Company Website and was interviewed before Aug 2023. There was 1 interview round.
I have over 5 years of experience as a Senior Business Analyst in various industries.
Led cross-functional teams to analyze business processes and identify areas for improvement
Developed and implemented strategies to increase efficiency and reduce costs
Utilized data analysis tools to generate insights and make data-driven recommendations
Collaborated with stakeholders to gather requirements and ensure project success
KPI's in retail are key performance indicators used to measure the success of a retail business.
Sales revenue
Customer satisfaction
Inventory turnover rate
Average transaction value
Conversion rate
Gross margin
Foot traffic
Return on investment (ROI)
Top trending discussions
I applied via Referral and was interviewed before Sep 2019. There was 1 interview round.
I applied via Approached by Company and was interviewed before Apr 2021. There were 2 interview rounds.
posted on 12 Jul 2021
I applied via Naukri.com and was interviewed before Jul 2020. There were 3 interview rounds.
I applied via Campus Placement and was interviewed before Oct 2021. There were 4 interview rounds.
Basic questions that need minimal logic
Time complexity is a measure of how long an algorithm takes to run as a function of the input size.
Time complexity is usually expressed using big O notation.
The best case, worst case, and average case time complexities may differ.
Common time complexities include O(1), O(log n), O(n), O(n log n), O(n^2), and O(2^n).
To optimize a coding challenge solution, we can use efficient algorithms and data structures.
Analyze the problem and identify the bottleneck
Use appropriate data structures like hash tables, trees, and graphs
Implement efficient algorithms like binary search and dynamic programming
Optimize the code by reducing unnecessary operations and improving memory usage
I appeared for an interview before Mar 2021.
Round duration - 60 Minutes
Round difficulty - Medium
In this round, I was first asked about the projects that I worked on in my previous company. I was also asked about the various tech stacks that I was familiar with and then the interviewer started asking me questions around Java and some basic OOPS concepts.
Packages in Java help organize code, prevent naming conflicts, and provide access control.
Organizes code into logical groups for easier maintenance and readability
Prevents naming conflicts by allowing classes with the same name to coexist in different packages
Provides access control by using access modifiers like public, private, protected, and default
Facilitates reusability by allowing classes in one package to be acc...
Java is platform independent because it compiles code into bytecode that can run on any system with a JVM, which is platform dependent.
Java code is compiled into bytecode, which is platform independent
The JVM interprets the bytecode and translates it into machine code specific to the underlying platform
This allows Java programs to run on any system with a JVM installed, making Java platform independent
Java Strings are immutable to ensure thread safety, security, and optimization.
Immutable strings prevent accidental changes, ensuring data integrity.
String pool optimization reduces memory usage by reusing common strings.
Thread safety is guaranteed as strings cannot be modified concurrently.
Security is enhanced as sensitive information cannot be altered once set.
JIT compiler stands for Just-In-Time compiler, which compiles code during runtime instead of ahead of time.
JIT compiler improves performance by compiling code on-the-fly as it is needed
It can optimize code based on runtime conditions and platform specifics
Examples include Java's HotSpot JIT compiler and .NET's RyuJIT compiler
ArrayList is non-synchronized and faster, while Vector is synchronized and slower.
ArrayList is not synchronized, while Vector is synchronized.
ArrayList is faster than Vector due to lack of synchronization.
Vector is thread-safe, while ArrayList is not.
Example: ArrayList<String> list = new ArrayList<>(); Vector<String> vector = new Vector<>();
Round duration - 60 Minutes
Round difficulty - Medium
This round had questions revolving around OOPS , Spring Boot and Docker. The questions were preety decent and standard and can be answered if one has prior experience in the given tech stack.
SOLID principles are a set of five design principles in object-oriented programming to make software designs more understandable, flexible, and maintainable.
S - Single Responsibility Principle: A class should have only one reason to change.
O - Open/Closed Principle: Software entities should be open for extension but closed for modification.
L - Liskov Substitution Principle: Objects of a superclass should be replaceable...
Garbage collector in Java is a built-in mechanism that automatically manages memory by reclaiming unused objects.
Garbage collector runs in the background to identify and remove objects that are no longer needed.
It helps prevent memory leaks and optimize memory usage.
Examples of garbage collectors in Java include Serial, Parallel, CMS, and G1.
The @SpringBootApplication annotation is used to mark a class as a Spring Boot application.
It combines @Configuration, @EnableAutoConfiguration, and @ComponentScan annotations.
It enables the auto-configuration feature of Spring Boot.
It starts the Spring application context, which is the core of the Spring Framework.
It scans the current package and its sub-packages for components to register.
It serves as the entry point
Dependency injection is a design pattern where components are provided with their dependencies rather than creating them internally.
Allows for easier testing by providing mock dependencies
Promotes loose coupling between components
Improves code reusability and maintainability
Examples: Constructor injection, Setter injection, Interface injection
Spring Boot offers basic annotations for various functionalities like mapping requests, handling exceptions, defining beans, etc.
1. @RestController - Used to define RESTful web services.
2. @RequestMapping - Maps HTTP requests to handler methods.
3. @Autowired - Injects dependencies into a Spring bean.
4. @Component - Indicates a class is a Spring component.
5. @Service - Indicates a class is a service component.
6. @Reposi...
The most commonly used instructions in a Dockerfile include FROM, RUN, COPY, and CMD.
FROM: Specifies the base image for the container
RUN: Executes commands in the container
COPY: Copies files and directories from the host to the container
CMD: Specifies the default command to run when the container starts
The command to import a pre-exported Docker image into another Docker host is 'docker load'
Use the 'docker load' command followed by the file path of the exported image tarball to import it into the Docker host
For example, 'docker load < my_image.tar.gz' will import the image from the file 'my_image.tar.gz'
Ensure that you have the necessary permissions to access the file and import images on the target Docker host
The lifecycle of a Docker container involves creation, running, pausing, restarting, and stopping.
1. Creation: A Docker container is created from a Docker image using the 'docker run' command.
2. Running: The container is started and runs the specified application or service.
3. Pausing: The container can be paused using the 'docker pause' command, which temporarily halts its processes.
4. Restarting: The container can be...
Round duration - 30 Minutes
Round difficulty - Easy
This was a Technical Cum HR round where I was first asked some basic Java related concepts and then we discussed
about my expectations from the company , learnings and growth in the forthcomig years. I would suggest be honest and
try to communicate your thoughts properly in these type of rounds to maximise your chances of getting selected.
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
I applied via Naukri.com and was interviewed before Jun 2021. There were 4 interview rounds.
I applied via Naukri.com and was interviewed in Apr 2021. There was 1 interview round.
I applied via Naukri.com and was interviewed before Apr 2021. There was 1 interview round.
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