Azuga Telematics Technical Support Engineer Interview Questions and Answers

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
Ans. 
Implementing the 'tail -f' command to continuously monitor and display new lines added to a file.
• Use 'open' to access the file in read mode.

• Utilize 'seek' to move to the end of the file initially.

• Implement a loop to read new lines as they are added.

• Use 'time.sleep()' to pause between reads to avoid busy waiting.

• Handle file rotation by checking if the file has been recreated.
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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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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
Ans. 
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...read more
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Code the LRU cache on hacker rank

Q1. Code the tail -f logger
Ans. 
Implement a tail -f logger in code
• Use a file pointer to open the log file

• Read the file line by line and print new lines as they are added

• Use a loop to continuously check for new lines in the file
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A working software coding problem. Build client-server. Make sure your IDE is ready

Q1. Difference between async, concurrency and parallelism
Ans. 
Async is non-blocking, concurrency is managing multiple tasks at the same time, parallelism is executing multiple tasks simultaneously.
• Async allows non-blocking execution of code, enabling other tasks to run while waiting for I/O operations.

• Concurrency involves managing multiple tasks at the same time, but not necessarily simultaneously.

• Parallelism is executing multiple tasks simultaneously, utilizing multiple CPU core...read more
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Q2. Journey of request
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The journey of a request refers to the process of a request being made, processed, and fulfilled by a system.
• Request initiation by a user or system

• Routing of the request to the appropriate service or endpoint

• Processing of the request by the service

• Response generation and delivery back to the user
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Q1. What are your strengths
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Q2. What irritates you
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I find it irritating when communication is unclear, leading to misunderstandings and inefficiencies in team projects.
• Lack of clear documentation can cause confusion; for example, when onboarding new team members.

• Ambiguous requirements from stakeholders can lead to wasted development time; like when a feature is built but not what was needed.

• Poor communication in team meetings can result in misaligned goals; for instanc...read more
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Stream a live log file to browser

Q1. Existing project details
Ans. 
The existing project is a web application for managing inventory and sales.
• Built using React for the front-end and Node.js for the back-end

• Uses MongoDB as the database

• Includes features such as user authentication, product management, and sales tracking
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Q1. Scale up existing project
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Scaling up an existing project involves optimizing performance, increasing capacity, and improving efficiency.
• Identify bottlenecks and areas for improvement

• Implement caching mechanisms to reduce load times

• Optimize database queries for faster retrieval

• Upgrade hardware or infrastructure to handle increased traffic

• Use load balancing to distribute traffic evenly across servers
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Q1. General question about the project, challenges, etc
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Q1. Implement tail -f command w/o use of external libraries
Ans. 
Implementing tail -f command without external libraries in Python
• Open the file in read mode

• Use a loop to continuously read new lines added to the file

• Print the new lines as they are read
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Q1. General questions on challenges, current role, production issues
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Q2. DSA Question - next warm day
Ans. 
Find the next warmer day for each day in a list of temperatures.
• Use a stack to keep track of indices of temperatures.

• Iterate through the temperature array from left to right.

• For each temperature, pop from the stack until the current temperature is warmer.

• Record the number of days until a warmer temperature is found.
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