Okta Interview Questions and Answers

Q1. Return a matrix after operations are performed on a matrix, such as swapping rows, swapping columns, and transposing
Ans. 
Perform matrix operations like row/column swaps and transposition to return a modified matrix.
• Swapping rows: Exchange two rows in the matrix. Example: Swap row 1 and row 2 in [[1,2],[3,4]] results in [[3,4],[1,2]].

• Swapping columns: Exchange two columns in the matrix. Example: Swap column 1 and column 2 in [[1,2],[3,4]] results in [[2,1],[4,3]].

• Transposing: Convert rows to columns and vice versa. Example: Transpose [[1,...read more
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Q2. Given an array of non-negative integers, how can they be transformed into single digits by repeatedly adding their digits, and how can the most frequently occurring number be identified?
Ans. 
Transform an array of integers into single digits and find the most frequent digit.
• Use the digital root concept: repeatedly sum the digits until a single digit is obtained. Example: 38 -> 3 + 8 = 11 -> 1 + 1 = 2.

• For each number in the array, apply the digital root transformation. Example: [38, 123, 456] becomes [2, 6, 6].

• Count the frequency of each resulting single digit using a hash map or dictionary. Example: {...read more
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Q1. What is your experience in cloud providers?
Ans. 
I have experience working with AWS, GCP, and Azure cloud providers.
• Managed infrastructure on AWS EC2 instances

• Utilized GCP services like Compute Engine and Cloud Storage

• Deployed applications on Azure Virtual Machines
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Q2. What projects did you do?
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Q1. Basic JS question, output of code.
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Q1. Print values of nested json element. Values is in array.
Ans. 
Print values of nested json element in array format
• Access the nested json element using dot notation

• Iterate through the array to print each value
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Q2. Basic Node JS Todo app, to add, update and get end points
Ans. 
A simple Node.js Todo app with endpoints to add, update, and retrieve tasks.
• Use Express.js to create a server and define routes for the API.

• Set up a basic in-memory array to store todo items.

• Implement POST /todos to add a new todo item.

• Implement PUT /todos/:id to update an existing todo item.

• Implement GET /todos to retrieve all todo items.
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Q1. Check if array can make strictly increasing order by making atmost 2 modifications.
Ans. 
Check if array can be made strictly increasing by modifying at most 2 elements.
• Iterate through the array and check if each element is greater than the previous one.

• If there are more than 2 elements that need to be modified, return false.

• Examples: ['1', '2', '3'] -> true, ['1', '3', '2', '4'] -> true, ['1', '1', '2', '3'] -> false
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Q2. Given 1000 servers and continue running steam check the stream is strictly increasing order. Divide those streams in 100 servers and process in parallel
Ans. 
Divide 1000 servers into 100 groups to check if streams are strictly increasing in parallel
• Divide the 1000 servers into 100 groups of 10 servers each

• Assign each group of servers to a separate processing unit for parallel checking

• Check if the stream on each server within the group is strictly increasing

• Combine the results from all groups to determine if all streams are strictly increasing
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Q1. How to manage terraform state file in common place so if one making changes other get modified file.
Ans. 
Use remote backend in Terraform to manage state file in a common place.
• Use remote backend in Terraform to store state file in a shared location like AWS S3 bucket or Azure Blob Storage.

• Configure Terraform to use the remote backend by specifying the backend configuration in the Terraform configuration file.

• Ensure proper access control and permissions are set up for the shared storage to prevent unauthorized access.

• Use l...read more
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Q2. Difference b/w freetyle and normal pipeline . How to check if build is successful.
Ans. 
Freestyle pipeline allows more flexibility in defining build steps compared to normal pipeline. Build success can be checked by examining the build status or logs.
• Freestyle pipeline allows users to define build steps manually, while normal pipeline follows a predefined structure.

• In freestyle pipeline, build steps can be configured using GUI, whereas normal pipeline uses a script-like syntax.

• To check if a build is succe...read more
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Q3. Current version of linux, running process of linux.
Ans. 
Current version of Linux is 5.14.6. Running processes in Linux can be viewed using commands like ps, top, and htop.
• Current version of Linux is 5.14.6

• Running processes in Linux can be viewed using commands like ps, top, and htop
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Q1. If I've mentored team? I've experience of backend or frontend (since my working experience in JS). About my last project.
Ans. 
Yes, I have mentored a team in both backend and frontend development, with experience in JavaScript.
• Mentored a team in backend and frontend development

• Experience in JavaScript

• Last project involved implementing a new feature in the frontend using React
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Design LRU Cache. Suggest the best Data structure for this.

Q1. Given a set of overlapping time ranges, calculate the total run time.
Ans. 
Calculate total run time of overlapping time ranges
• Sort the time ranges by start time

• Iterate through the sorted time ranges and merge overlapping ranges

• Calculate the total run time by summing up the merged ranges
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