Metro Cash & Carry Software Developer Interview Questions and Answers

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Q1. Java question about oops concept
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Q2. Dsa problem k connected airports
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Q1. Why u want to join walmart
Ans. 
I want to join Walmart because of its reputation as a leading retail company with a strong focus on technology and innovation.
• Opportunity to work on cutting-edge technology projects

• Chance to contribute to a well-known and respected company

• Desire to be part of a team that values innovation and growth
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Q1. What is garbage collector in python
Ans. 
Garbage collector in Python is a built-in feature that automatically manages memory by reclaiming unused memory space.
• Garbage collector in Python helps in automatically deallocating memory of objects that are no longer in use.

• It prevents memory leaks by freeing up memory that is no longer needed.

• Python's garbage collector uses reference counting and a cycle-detecting algorithm to manage memory efficiently.
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Q1. Explain about spring boot
Ans. 
Spring Boot is a framework that simplifies the development of Java applications by providing pre-configured settings and tools.
• Spring Boot eliminates the need for manual configuration by providing defaults for most settings.

• It allows for standalone Spring applications that can be started using a simple 'java -jar' command.

• Spring Boot includes embedded servers like Tomcat, Jetty, or Undertow for deploying applications.

• I...read more
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Q1. What is your name
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Q2. Disscus about your hobbies and skills
Ans. My hobbies are reading books playing game and listening music my skills are core Java,c++ .
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Q3. Discuss about your college
Ans. In our college are very precious and good teaching sirs and madams.
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Q1. Why string arr immutable
Ans. 
String arrays are immutable because they cannot be changed once created.
• Strings in an array cannot be modified individually

• Any changes to a string array result in a new array being created

• Immutable arrays ensure data integrity and prevent unintended side effects
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Q2. How we can create a custom immutable class
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To create a custom immutable class, use final keyword for class, private final fields, and no setter methods.
• Use the final keyword for the class to prevent inheritance

• Declare all fields as private and final to prevent modification

• Do not provide setter methods for the fields to maintain immutability

• Provide getter methods to access the fields
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30mins good easy 2 problems

Prepare dsa and focus on coind

Basic java question, design questions, 1 data structure question

Q1. Asked puzzle and previous project experience
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Q2. Monitor microservices using Spring actuator
Ans. 
Spring Actuator provides endpoints to monitor and manage microservices in a Spring Boot application.
• Add Spring Boot Actuator dependency in pom.xml

• Enable Actuator endpoints in application.properties or application.yml

• Access Actuator endpoints like /actuator/health, /actuator/info, etc.

• Customize Actuator endpoints using configuration properties
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Q3. How webflux works
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Webflux is a reactive programming framework for building non-blocking, event-driven applications on the JVM.
• Webflux is part of the Spring Framework and provides support for reactive programming.

• It allows developers to build asynchronous, non-blocking applications that can handle a large number of concurrent connections.

• Webflux uses Project Reactor, a reactive library for building reactive applications.

• It supports both ...read more
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