Moonfrog Labs Interview Questions and Answers

Q1. Do you have any experience working in data center
Ans. 
Yes, I have 5 years of experience working in data centers.
• Managed server hardware installations and upgrades

• Performed routine maintenance tasks such as cabling and rack mounting

• Troubleshooted network and server issues

• Implemented disaster recovery plans

• Monitored and optimized data center performance
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Q2. What’s component inside of server
Ans. 
Components inside a server include CPU, RAM, hard drives, power supply, motherboard, and network interface cards.
• CPU (Central Processing Unit) - processes instructions and performs calculations

• RAM (Random Access Memory) - stores data and instructions that the CPU needs

• Hard drives - store data and programs long-term

• Power supply - provides electricity to the server components

• Motherboard - connects all the components toge...read more
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Q3. What’s should you do before turn off server?
Ans. 
Before turning off a server, it is important to properly shut down all running applications and services to prevent data loss or corruption.
• Save any work in progress and close all applications

• Ensure all services are stopped gracefully

• Check for any pending updates or patches

• Backup important data if necessary

• Notify users or stakeholders about the planned shutdown

• Document the shutdown process for future reference
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Q4. Tell me different type of optical cables
Ans. 
Different types of optical cables include single-mode fiber, multi-mode fiber, and plastic optical fiber.
• Single-mode fiber: used for long-distance communication, has a small core size and transmits infrared laser light.

• Multi-mode fiber: used for shorter distances, has a larger core size and transmits infrared LED light.

• Plastic optical fiber: used for short-distance applications like home networks, made of plastic inste
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Q1. Process of troubleshooting network issue
Ans. 
Troubleshooting network issues involves identifying the problem, gathering information, isolating the cause, and implementing a solution.
• Identify the problem by gathering information from users and monitoring tools

• Isolate the cause by checking network configurations, hardware, and software

• Implement a solution by making necessary changes and testing the network

• Document the troubleshooting process for future reference
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Q2. What tools do you use to check optical fiber
Ans. 
I use tools like optical power meters, visual fault locators, and OTDRs to check optical fiber.
• Optical power meters measure the power level of the optical signal.

• Visual fault locators help identify breaks or bends in the fiber.

• OTDRs (Optical Time Domain Reflectometers) analyze the quality of the fiber by sending pulses of light and measuring reflections.
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The test was conducted on HackerRank. One Javascript question and has to be solved.

Q1. Discussion on building a scalable system.
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Q1. Peer panel round - Discussion on how a feature has been built. What tradeoffs you thought of etc
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Q1. Behavioural and culture fit
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Q1. General discussion on what is expected from the role and what are my expectations etc
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Q1. All related to domain javascript/react,
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Q2. Fallback in lazy loading,optimization techniques/for API call
Ans. 
Fallback in lazy loading is important for optimizing API calls to ensure a smooth user experience.
• Implementing a loading spinner or placeholder while content is being loaded asynchronously

• Using a default value or cached data if the API call fails

• Implementing error handling to gracefully handle any issues with the API call
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Train,percentage,work

Array , string , basic

Q1. Basic dsa question and oops
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Q1. About company and traditaion question
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Coding related to java collections

Q1. Familiar with Design patterns ?explain few
Ans. 
Design patterns are reusable solutions to common problems in software design.
• Design patterns help in creating maintainable and scalable code.

• Examples of design patterns include Singleton, Factory, Observer, and Strategy.

• Singleton pattern ensures a class has only one instance and provides a global point of access to it.

• Factory pattern creates objects without specifying the exact class of object that will be created.

• Obse...read more
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Q2. What is Mutilthreading,explain with examples
Ans. 
Multithreading is the ability of a CPU to execute multiple threads concurrently, allowing for improved performance and responsiveness.
• Multithreading allows multiple tasks to be executed simultaneously on a single CPU.

• Each thread has its own stack and program counter, but shares the same memory space.

• Examples include running multiple processes in a web server, handling user input while performing background tasks, and p
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Q1. Some C++ 14/17 questions and OOPs concepts
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Q2. DSA questions based for basic game logics.
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Q1. Advanced OOPs and C++ questions
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Q2. DSA coding questions based on Stacks and Linked list
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Q1. Called me to Noida for a F2F HR round. I wasn’t given any Travel allowance. CTC negotiation was brutal. They were not willing to give me even a 5% hike on my previous salary.The HR and the Team said they’d...read more
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Q2. A month passed by. Sometimes they’d say the technical team who took your interview wasn’t available so that the CTC discussion could be further done. And somedays they’d just delay by saying we’d get back ...read more
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Q3. After a month of wasting my time. The HR finally called and said they rejected me based on the CTC. And are not even willing to negotiate because of my not so well performance in the technical rounds.
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Q1. Core java related problems
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Q2. Java programming
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Q1. Framework design
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Q2. Software Testing Life cycle
Ans. 
Software Testing Life cycle is a process of planning, designing, executing, and reporting on tests throughout the software development lifecycle.
• STLC involves planning, designing, executing, and reporting on tests

• It includes phases like requirement analysis, test planning, test design, test execution, and test closure

• Each phase has specific objectives and deliverables to ensure quality software is delivered

• STLC helps i...read more
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