Frontdoor Interview Questions and Answers

Q1. Find index of second smallest and second largest element in an array
Ans. 
Find index of second smallest and second largest element in an array of strings
• Convert the array of strings to an array of integers for comparison

• Sort the array to easily find the second smallest and second largest elements

• Track the indices of the elements as you iterate through the sorted array
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Q2. Multiple questions on collection framework and hashmap internals
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Q3. Basics of docker k8s
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Q1. Code to covert number into words For ex. 11 -> Eleven
Ans. 
Convert a number into words
• Create an array of strings to represent numbers from 0 to 19

• Use conditional statements to handle numbers from 20 to 99

• Consider special cases like multiples of 10 and teens
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Q2. Load Balancer design
Ans. 
Load balancer design involves distributing incoming network traffic across multiple servers to ensure optimal resource utilization and prevent overload.
• Consider the type of traffic being balanced (HTTP, TCP, UDP)

• Choose between hardware or software load balancers based on requirements

• Implement algorithms like round-robin, least connections, or IP hash for load distribution

• Ensure high availability by setting up redundant...read more
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Q3. Basic questions on database queries and joins
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Q4. Questions on HTTP Methods
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Q1. Difference between join and subqueries
Ans. 
Join is used to combine rows from two or more tables based on a related column, while subquery is a query nested within another query.
• Join is used to retrieve data from multiple tables based on a related column

• Subquery is a query nested within another query

• Join is typically more efficient than subqueries for large datasets

• Example: SELECT * FROM table1 JOIN table2 ON table1.id = table2.id

• Example: SELECT * FROM table WHE
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Q2. Questions on how to handle deprecation of an API?
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Q1. Architecture related questions
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Q2. Kafka working and zookeeper role init
Ans. 
Kafka is a distributed streaming platform while Zookeeper is a centralized service for maintaining configuration information.
• Kafka is used for building real-time data pipelines and streaming apps

• Zookeeper is responsible for managing and coordinating Kafka brokers

• Zookeeper stores metadata about Kafka cluster and helps in leader election

• Kafka brokers use Zookeeper to discover other brokers and to maintain topic partition
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Q1. Scripting question based on live log example
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Q2. Kubernetes yaml file explanation
Ans. 
Explanation of Kubernetes YAML file
• Kubernetes YAML files are used to define and deploy applications on a Kubernetes cluster

• They contain information about the application's containers, volumes, services, and other resources

• YAML files can be used to create, update, or delete resources on the cluster

• They can also be used to define custom resource definitions (CRDs) for custom resources

• YAML files can be validated using the...read more
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Few coding tests on hacker rank with some technical questions

Q1. Salary discussion and policies
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