Precision Precast Solutions Associate Engineer Interview Questions and Answers

Q1. What is the difference between supervised and unsupervised learning
Ans. 
Supervised learning uses labeled data for training, while unsupervised learning identifies patterns in unlabeled data.
• Supervised learning requires labeled datasets, e.g., predicting house prices based on features like size and location.

• Unsupervised learning works with unlabeled data, e.g., clustering customers based on purchasing behavior.

• In supervised learning, the model is trained to minimize error between predicted ...read more
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Q2. Explain a project where you used python for data analysis
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Q1. More than technology,a senior recruiter asks where you stay which gali you stay,which temple is near by,what your husband do,getting into more personal and final he will ask your janam kundali and tell you...read more
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Q1. Senior recruiter will ask more personal questions
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There was total of 40 questions
First 20: Aptitude based topics like time and work, profit and loss, speed and distance
Second 20: Programming MCQs based on C, C++ and python. Task is to guess the correct output and errors.

There were 4 coding questions based on array, 2 SQL queries and one article.
Coding questions were easy for batch 2 but difficult for batch 1. Star patterns are present in batch 1.
SQL queries were easy.
One article (200-300)words. Topics was Google maps.

Q1. Founder came and asked approach I used to solve coding questions in round 2. He then check the output for each question. Then he checked the SQL queries I have written, in which I had write two wrong queri...read more
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Q2. He asked me about different approaches to solve a problem
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Q3. He asked about the project I had done on Java Full stack.
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First there will be a topic given to you to write an article of length 300-400 words in 15 mins. This article writing is to check your knowledge of English language.
Then there is a 45 mins round test in which 40 questions will be asked.
20 Technical and 20 Programming.
The programming questions will be from C++, and you are required to choose the correct output of the given C++ program.
The technical aptitude questions were medium to hard.

Q1. It's a 1:30 hr round. In this part, there will be 4 coding questions from arrays topic which you can solve with any programming language you know. Along with this, you will have 2 questions from SQL and e...read more
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It has general aptitude questions with moderate difficulty

It was mixed coding plus SQL question after the exam I had explain my solution.

It consists of basic aptitude questions and some coding output questions followed by basic SQL questions. Overall the difficulty level was medium.

Q1. They asked me to write code for 4 problems. All questions consists array medium level and then there are difficult SQL questions to solve. Unfortunately I couldn't passed this round. But it was a great lea...read more
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Q1. What is the use of preventpefault() in React?
Ans. 
preventDefault() in React prevents the default action of an event from occurring, allowing for custom behavior.
• Used in event handlers to stop default browser actions, e.g., preventing form submission.

• Example: <form onSubmit={(e) => { e.preventDefault(); handleSubmit(); }}>...</form>

• Useful for handling custom validation before submission.

• Can be applied to links to prevent navigation: <a href='#' onClic...read more
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Q2. What is Middleware?
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Q3. Why is server.js used?
Ans. 
server.js is a crucial file in Node.js applications, managing server configurations and routing requests.
• Acts as the entry point for a Node.js application, initializing the server.

• Handles incoming requests and routes them to appropriate handlers.

• Configures middleware for processing requests, such as body parsing or logging.

• Can define API endpoints, e.g., app.get('/api/users', (req, res) => { ... });

• Facilitates conne...read more
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Q4. How is Tailwind CSS better than normal (traditional) CSS?
Ans. 
Tailwind CSS offers utility-first styling, promoting faster development and easier maintenance compared to traditional CSS.
• Utility-first approach: Tailwind provides utility classes like 'bg-blue-500' for background color, reducing the need for custom CSS.

• Faster prototyping: With pre-defined classes, developers can quickly build layouts without writing extensive CSS.

• Responsive design: Tailwind includes responsive utilit...read more
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