Sakhatech Information Systems Interview Questions and Answers

Q1. Coalesce, SQL Order of Execution
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Q2. Given a table with fields(id, name, salary, managerId) find out the managers who have atleast 5 reportees under him/her.
Ans. 
Use SQL query to count number of reportees for each manager and filter out those with atleast 5 reportees.
• Write a SQL query to count number of reportees for each manager using GROUP BY clause

• Add HAVING clause to filter out managers with atleast 5 reportees

• Example: SELECT managerId, COUNT(id) AS num_reportees FROM table_name GROUP BY managerId HAVING num_reportees >= 5
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Q3. How to manage large datasets in python
Ans. 
Use libraries like pandas and dask to efficiently manage large datasets in Python.
• Use pandas library for data manipulation and analysis.

• Use dask library for parallel computing and out-of-core processing.

• Optimize memory usage by loading data in chunks or using data types efficiently.

• Consider using cloud services like AWS S3 or Google BigQuery for storing and processing large datasets.
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Q4. Name few of the commonly used python libraries used by DA
Ans. 
Some commonly used Python libraries for Data Analysts are Pandas, NumPy, Matplotlib, and Scikit-learn.
• Pandas - used for data manipulation and analysis

• NumPy - used for numerical computing and working with arrays

• Matplotlib - used for data visualization

• Scikit-learn - used for machine learning and data mining
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Q1. What are Agile Values? Scrum Values? Scrum Ceremonies? Story Points?
Ans. 
Agile values include individuals and interactions over processes and tools, while Scrum values include commitment, courage, focus, openness, and respect.
• Agile values prioritize individuals and interactions over processes and tools

• Scrum values include commitment, courage, focus, openness, and respect

• Scrum ceremonies include Sprint Planning, Daily Standup, Sprint Review, and Sprint Retrospective

• Story points are a unit of...read more
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Q2. As project manager what docs do you prepare? How do you contribute as a PM?
Ans. 
As a project manager, I prepare various documents such as project plans, schedules, budgets, risk assessments, and progress reports. I contribute by leading the team, managing resources, and ensuring project success.
• Prepare project plans outlining scope, objectives, deliverables, and timelines

• Create schedules to allocate tasks and track progress

• Develop budgets to manage project costs effectively

• Conduct risk assessments...read more
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Q3. Capacity? Velocity? etc Agile/Scrum-based questions (bookish) this round was taken by Rajni
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Q1. Megha took my final round and asked me questions about Agile/Scrum, Stroy Points (estimation).
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Q2. Ques on explaining Sprint Planning, Retro, Review, using Doc/Excel (screen sharing)
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Q3. Ques on Conflict and Resource Management, some scenario-based question.
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Q4. How will you make a low-performing resource a high-performing one?
Ans. 
Provide clear expectations, offer support and training, provide feedback and recognition, set goals and milestones.
• Clearly communicate expectations and goals to the resource.

• Offer support and training to help the resource improve their skills and knowledge.

• Provide regular feedback and recognition for progress made.

• Set specific goals and milestones to track improvement.

• Create a development plan with the resource to addr...read more
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Q5. Megha did not hire me because she felt I had adequate knowledge and practical experience. (insecurities) Anyway, good luck with your interview.
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Q6. What is Scrum of Scrums? What is PI planning?
Ans. 
Scrum of Scrums is a scaled agile framework where multiple Scrum teams coordinate their work. PI planning is a key event in SAFe where teams plan their work for the upcoming Program Increment.
• Scrum of Scrums involves representatives from each Scrum team meeting regularly to discuss dependencies and progress.

• PI planning is a two-day event where teams align on their objectives, dependencies, and priorities for the upcomi...read more
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Pretty standard GD on topics around working remotely and country's macroeconomic

Q1. Derivative Knowledge Check
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Q2. Alternate Investment Knowledge Check
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Q1. Scenario Based and financial instrument level
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Q2. Deep dive into derivative and alternative investment
Ans. 
Derivative and alternative investments involve complex financial instruments and strategies beyond traditional stocks and bonds.
• Derivatives are financial contracts whose value is derived from an underlying asset, index, or rate. Examples include options, futures, and swaps.

• Alternative investments are non-traditional assets such as private equity, hedge funds, real estate, and commodities.

• Both derivative and alternative...read more
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Q1. General HR Question
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Q2. Strength and Weakness
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Code Snept question with 3-4 Reasoning question. Google form

Pen paper coding round. String , Array . Linkedlist , graph, questions

Q1. Maximum Spaning
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Q2. Nearest Prime number
Ans. 
To find the nearest prime number, iterate from the given number in both directions until a prime number is found.
• Start iterating from the given number in both directions to find the nearest prime number.

• Check if a number is prime by dividing it by all numbers less than its square root.

• Keep track of the closest prime number found during the iteration.
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Q3. Second Maximum Number in Array
Ans. 
Find the second maximum number in an array of strings.
• Convert the array of strings to an array of integers.

• Sort the array in descending order.

• Return the second element in the sorted array.
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Q1. Project Question
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Q2. Robot question of DSA
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Q3. Stock Buy and sell - VI . Leetcode Hard
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Q4. Leetcode Medium
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Q1. Bias variance trade off
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Q2. What is AB testing
Ans. 
AB testing is a method used to compare two versions of a webpage or app to determine which one performs better.
• AB testing involves creating two versions (A and B) of a webpage or app with one differing element

• Users are randomly assigned to either version A or B to measure performance metrics

• The version that performs better in terms of the desired outcome is selected for implementation

• Example: Testing two different call...read more
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Q3. Basic traditional ML question about ML metrics, bagging boosting etc.
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It was a classification problem

Q1. Questions about assignment
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Q2. Questions from resume.
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Q3. Questions based on probability, statistics and loss functions
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Q1. Explain the architecture of transformer models.
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Q2. What's the role of attention in transformers? Additionally, which one of the two networks has a faster training process - RNNs or transformers?
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Duration was 1 hour. First asked verbal technical questions based on deep learning concepts, then asked me to code an easy leet code problem.

This round was with the hiring manager. It was mostly like a technical discussion, but he started by discussing the projects that I had worked on from my resume. Then it eventually turned into a system design type of a round.

**1st Round: Online Assessment**
The first elimination round consisted of an online assessment focused on HTML, CSS, and JavaScript. The questions ranged from basic to advanced, with a significant emphasis on JavaScript concepts like promises and async operations. This round included negative marking, so accuracy was key.

**2nd Round: DSA Online Test**
The second elimination round tested Data Structures and Algorithms (DSA). It involved two compulsory problems: one focused on string manipulation and the other on array manipulation, both requiring solutions with O(1) space complexity.

**3rd Round: Personality Test**
This non-elimination round assessed grammar and communication skills. It included:
- Fill-in-the-blank questions focused on subject-verb agreement.
- Sentence repetition tasks where we had to listen and repeat the given sentences.
- Audio-based tasks requiring us to repeat sentences after listening to them.

**4th Round: Home Assignment**
In this elimination round, we were tasked with cloning a webpage using only HTML, CSS, and JavaScript. The goal was to create a pixel-perfect design without the use of frameworks or libraries like Bootstrap.

Candidates who cleared this round invited to the JTG campus for further process.

**5th Round: DSA **
This elimination round began with solving DSA problems focused on string and array manipulation.

**6th Round: Live Coding Assignment**
Round 5th was followed by a live coding task where we had to build a to-do application using only HTML, CSS, and JavaScript. The application needed to leverage local storage for data persistence. The technical interview in this round was based on the live coding task.

Q1. **6th and 7th Rounds: Technical Interviews** The next two elimination rounds were back-to-back technical interviews. They covered advanced concepts in HTML, CSS, and JavaScript, along with DSA problems.
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Q1. **9th Round: HR Interview** The final round was an HR interview, where the focus was on personality traits, career aspirations, and alignment with the company’s values. **Verdict: Selected**
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