Nsight Inc Linux Administrator Lead Interview Questions and Answers

Q1. Project description
Ans. 
The project involves developing a new software application for data analysis.
• Developing a software application for data analysis

• Utilizing programming languages such as Python and R

• Implementing statistical models and algorithms

• Creating visualizations and reports for data interpretation
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Q2. Project, ML & Stats
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Q1. How does RNN work?
Ans. 
RNN stands for Recurrent Neural Network, a type of neural network designed to handle sequential data by maintaining a memory of previous inputs.
• RNNs have loops within their architecture, allowing information to persist.

• They are commonly used in natural language processing, speech recognition, and time series analysis.

• An example of RNN is predicting the next word in a sentence based on previous words.
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Q2. What do you mean by topic modeling?
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Topic modeling is a technique used in natural language processing to discover the hidden thematic structure in a collection of texts.
• Topic modeling is a type of statistical modeling that allows for the discovery of hidden patterns in a collection of documents.

• It is often used in text mining to identify topics within a set of documents without the need for manual labeling.

• One popular algorithm for topic modeling is Late...read more
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Q1. Leetcode 125: Valid Palindrome
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Q2. Leetcode 1971: Find if path exists in graph
Ans. 
Check if a path exists between two nodes in a graph
• Use depth-first search (DFS) or breadth-first search (BFS) to traverse the graph

• Start from the source node and explore all connected nodes until the destination node is reached

• If the destination node is found during the traversal, return true; otherwise, return false
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Q1. How will you store passwords in DB
Ans. 
Store passwords securely using hashing algorithms and salt
• Use strong hashing algorithms like bcrypt or SHA-256

• Add a unique salt to each password before hashing

• Store only the hashed password in the database

• Regularly update hashing algorithms and salts for added security
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Q2. Explain "this" in JS
Ans. 
In JavaScript, 'this' refers to the current object that is executing the current function.
• The value of 'this' is determined by how a function is called.

• When a function is called as a method of an object, 'this' refers to the object itself.

• When a function is called in the global scope, 'this' refers to the global object (window in a browser, global in Node.js).

• Arrow functions do not have their own 'this' value and inste...read more
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Q1. Basic HR questions
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Q1. Describe the Project Architecture End-to-End
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The project architecture end-to-end includes the overall design and structure of the project from start to finish.
• The architecture should include the hardware and software components, as well as the communication protocols and data flow.

• It should also consider the scalability, security, and performance of the system.

• Examples of project architecture include client-server, microservices, and event-driven architectures.

• Th...read more
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Q2. Explain how will you implement SCD Type 2.
Ans. 
SCD Type 2 is implemented by creating a new record for each change and maintaining a history of changes.
• Identify the business key and version number for the dimension table.

• Create a new record with a new version number for each change to the dimension data.

• End-date the previous record and start-date the new record to maintain a history of changes.

• Use effective dates to determine which record is active at any given poin...read more
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Q1. Display only those elements which do not occur more than once.
Ans. 
Display non-repeated elements
• Iterate through the elements and count their occurrences

• Display only those elements with occurrence count of 1

• Use a hash table or dictionary to store the counts

• Time complexity: O(n)
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Q2. Difference between a list and a tuple. Explain a use case where you will use a tuple.
Ans. 
List vs Tuple and use case for Tuple
• List is mutable while Tuple is immutable

• List uses square brackets while Tuple uses parentheses

• Tuple is used when data needs to be protected from modification

• Tuple is also used for returning multiple values from a function
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Q1. I am unable to understand why they conduct interview if the interviewer is not fimilier about the role. waste of time to attend the interview
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Q2. Unrelated queations
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Q1. Unrelated scenarios and questions
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Q1. Applied through LinkedIn and was shortlisted 1st round was a discussion about current experience and domain knowledge, questions around revenue assurance areas
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Q2. Later was asked some domain questions around telecom frameworks and TMforum frameworks
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Was given a business case and was asked to come up with a PPT presentation for a consulting engagement with

Scope
Approach
Timelines
Deliverables
Recommendations

In the area of revenue assurance for a telecom client

Coding covered LC medium and easy questions on recursion, trees n dp.

Q1. Technical covered concurrency, ui questions and some logical programming
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Q1. Design system included your class diagram and lld and codng design patterns and api interfaces.
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Online hackerrank test. Keep time limit in mond. Sas test was easy for me, only had to keep track of time limit.

Q1. Not too difficult. Mainly questioned about the projects mentioned in resume.
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Q1. Very similar to round 2 but got better clarity on role and ptoject
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