One Network Enterprises Performance Test Engineer Interview Questions and Answers for Experienced

Q1. Can you provide an introduction about yourself?
Ans. 
I'm a passionate software engineer with a strong background in full-stack development and a love for solving complex problems.
• Education: Bachelor's degree in Computer Science from XYZ University.

• Experience: 3 years of experience in developing web applications using React and Node.js.

• Projects: Developed an e-commerce platform that increased sales by 30% within the first quarter.

• Skills: Proficient in JavaScript, Python, ...read more
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Q2. What qualifications have you obtained, and can you explain the project you completed during your engineering studies?
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I hold a Bachelor's degree in Computer Engineering and developed a web-based project for managing student records.
• Bachelor's degree in Computer Engineering from XYZ University.

• Completed a capstone project on a web application for student record management.

• Utilized technologies like HTML, CSS, JavaScript, and Node.js.

• Implemented features such as user authentication, data visualization, and a responsive design.

• Collaborat...read more
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Q1. Why do you believe this company is a suitable fit for you?
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This company aligns with my values, offers growth opportunities, and fosters innovation, making it an ideal environment for my skills.
• The company's commitment to innovation resonates with my passion for developing cutting-edge software solutions.

• I admire the collaborative culture here, which I experienced during my interactions with the team during the interview process.

• The emphasis on professional development and cont...read more
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Q2. Do you have any questions
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Q1. Linux commands,
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Q2. Cloud technologies different services (iaas, paas, saas)
Ans. 
Cloud technologies offer different services like IaaS, PaaS, and SaaS for varying levels of control and management.
• IaaS (Infrastructure as a Service) provides virtualized computing resources over the internet, such as virtual servers and storage.

• PaaS (Platform as a Service) offers a platform allowing customers to develop, run, and manage applications without dealing with infrastructure.

• SaaS (Software as a Service) deli...read more
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Q3. What do you know AWS
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There was coding test

Q1. 2 technical rounds
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Q2. Merge sort algorithm
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Merge sort is a divide and conquer algorithm that divides the input array into two halves, sorts them separately, and then merges them back together in sorted order.
• Divide the input array into two halves

• Recursively sort each half

• Merge the sorted halves back together
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Q1. Leetcode Easy question
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Chrome and Firefox Browser automation

Log file tail last n lines where n is configurable. Followup question on how you can optimize it further incase log file size is in TBs and incase it is cluster of servers

Q1. Detailed Technical background check and discussion on past projects.
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Q2. Messaging queue and best practices
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Messaging queues are used to manage asynchronous communication between different components of a system.
• Use a reliable messaging queue system like RabbitMQ or Apache Kafka

• Ensure messages are properly formatted and serialized

• Implement message acknowledgement and retry mechanisms

• Monitor queue health and performance

• Consider message ordering and partitioning for scalability

• Avoid long-running tasks in message handlers
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Q3. Binary Search Tree twisted question
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Q4. Map Reduce concept for solving dictionary keywords
Ans. 
MapReduce is a programming model for processing large data sets in parallel.
• MapReduce divides the input data into chunks and processes them in parallel.

• It consists of two phases: Map and Reduce.

• Map function takes input data and converts it into key-value pairs.

• Reduce function takes the output of Map as input and combines the values with the same key.

• It is used for solving dictionary keywords by mapping each word to a k
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Normal 3 leetcode medium questions

Machine coding round to design tail -f

Q1. Questions on internal working of os
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Q2. Questions on projects
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MCQ based Questions from topics of DSA , web development

Q1. Asked us to live code tail -f unix command
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Machine coding round

Q1. TCP/IP related questions, what happens when you search a webpage?
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Q2. Past projects discussions
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Q1. Behavioural questions on how would you tackle a particular scenario
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