Hutech Solutions 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 is the concept of a session in PHP?
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A session in PHP is a way to store information (variables) to be used across multiple pages.
• Sessions are used to store user data on the server for later use

• Sessions are identified by a unique session ID, usually stored in a cookie

• Session data is stored on the server side, making it more secure than using cookies alone
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Q2. What is the difference between variables and constants in PHP?
Ans. 
Variables can be changed during the execution of a script, while constants cannot be changed once they are defined.
• Variables can be reassigned with new values, while constants cannot be changed once defined

• Constants are defined using the define() function, while variables are assigned using the $ symbol

• Constants are case-sensitive by default, while variables are case-insensitive
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Q3. What will be the output of the code below and why?
Ans. 
The code will output 'Hello World!' because the variable $x is set to true.
• The code will check if $x is true, which it is, so it will output 'Hello World!'

• The if statement will only execute if the condition is true, in this case $x is true.
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What are the differences between echo and print in PHP?

It includes questions from aptitude as well as coding related questions, JAVA was the most common language in which majority of the coding questions were

Q1. Questions related to the skills mentioned under Resume
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Q2. One DSA question is must, like Pallyndrome
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Q1. Questions regarding your project
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Q2. Questions regarding your internship experience and if any difficulties faced during internship
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Q1. Reverse the string and find occurance of character in java
Ans. 
To reverse a string and find the occurrence of a character in Java.
• Use StringBuilder to reverse the string.

• Use a loop to iterate through the string and count the occurrences of the character.

• Use the charAt() method to access individual characters in the string.
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Q2. Write screenshot script in selenium
Ans. 
To take a screenshot in Selenium, use the getScreenshotAs method
• Create a WebDriver instance

• Use the getScreenshotAs method to capture the screenshot

• Save the screenshot to a file using File class
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Q3. Write getter an setter method
Ans. 
Getter and setter methods are used to access and modify the values of private variables in a class.
• Create a method with the prefix 'get' followed by the variable name to retrieve its value.

• Create a method with the prefix 'set' followed by the variable name to set its value.

• Ensure the getter method returns the value of the variable and the setter method updates the variable with the passed value.
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Q4. Opps concept and its pillar
Ans. 
Object-oriented programming paradigm and its four pillars: Inheritance, Encapsulation, Abstraction, Polymorphism
• Inheritance: Allows a class to inherit properties and behavior from another class

• Encapsulation: Bundling data and methods that operate on the data into a single unit

• Abstraction: Hiding the complex implementation details and showing only the necessary features

• Polymorphism: Ability to present the same interface
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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.

Q1. Javascript ques like 3-4
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Q1. LLD frontend on docs
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Q1. Manager discussion
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Q1. Frontend code quality
Ans. 
Frontend code quality is crucial for performance, maintainability, and scalability of web applications.
• Consistent coding style and conventions improve readability and maintainability.

• Modular and reusable code components enhance scalability and reduce duplication.

• Regular code reviews and testing ensure high quality and bug-free code.

• Optimizing performance by minimizing file sizes, reducing HTTP requests, and using effic...read more
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Q1. Manager diccussion
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Q1. System administrator
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Q2. System hard ware
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Hardware & networking

All software update update

Q1. Company is very nice
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Q2. Very nice company
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Q1. What information do you have about the company?
Ans. 
The company is a leading technology firm specializing in software development and IT solutions.
• Founded in 2005

• Headquartered in Silicon Valley

• Offers a wide range of services including web development, mobile app development, and cloud computing

• Clients include Fortune 500 companies and startups
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Q2. How can you identify a client?
Ans. 
Clients can be identified through various methods such as networking, referrals, market research, and online presence.
• Networking events and conferences

• Referrals from existing clients or business partners

• Market research to identify potential clients in target industries

• Online presence through social media, website, and online directories
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The questions are quite simple.

Two SQL and two Python HackerRank questions.

Q1. What questions were asked regarding your resume project?
Ans. 
Questions were asked about the projects listed on my resume, focusing on the technologies used, challenges faced, and results achieved.
• Technologies used in the project

• Challenges faced during the project

• Results achieved from the project
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Q1. General questions
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