ParallelDots Software Developer Interview Questions and Answers

Q1. How python dictionary is implemented internally ?
Ans. 
Python dictionary is implemented using hash tables.
• Python dictionary is a collection of key-value pairs.

• The keys in a dictionary must be unique and immutable.

• The values in a dictionary can be of any data type.

• Python dictionary is implemented using hash tables.

• Hash tables provide constant time complexity for insertion, deletion and retrieval of elements.

• The hash function used in Python dictionary is based on the key's h...read more
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Q2. What is heap sort
Ans. 
Heap sort is a comparison-based sorting algorithm that uses a binary heap data structure.
• It divides the input into a sorted and an unsorted region.

• It repeatedly extracts the maximum element from the unsorted region and inserts it into the sorted region.

• It has a time complexity of O(n log n) and is not stable.

• Example: [8, 5, 3, 1, 9, 6, 0, 7, 4, 2] -> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
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Q3. Coding question to sort array based on a custom filter
Ans. 
Sort an array of strings based on a custom filter criteria.
• Define the custom filter criteria (e.g., length, alphabetical order).

• Use built-in sorting functions with a comparator.

• Example: Sort by length: ['apple', 'banana', 'kiwi'] -> ['kiwi', 'apple', 'banana'].

• Example: Sort alphabetically: ['banana', 'apple', 'kiwi'] -> ['apple', 'banana', 'kiwi'].
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Core HTML, CSS and JS

JS deep dive and react

Q1. Mimic Promise.all, Array.flat, OTP Component etc
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Q1. How to centre a div container
Ans. 
Centering a div container can be achieved using CSS techniques like flexbox, grid, or margin auto for block elements.
• Using Flexbox: Set the parent container to display: flex; and justify-content: center; align-items: center; to center the child div.

• Example: .parent { display: flex; justify-content: center; align-items: center; height: 100vh; } .child { width: 50%; }

• Using Grid: Set the parent to display: grid; and use p...read more
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Q2. What is a command to run a react project
Ans. 
To run a React project, use the command 'npm start' in the project directory to start the development server.
• Navigate to the project directory: Use 'cd your-project-name' to go to your React project folder.

• Install dependencies: Run 'npm install' to install all required packages listed in package.json before starting the project.

• Start the development server: Execute 'npm start' to launch the React application in your de...read more
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Q3. What is the Full Form of nmp
Ans. 
NPM stands for Node Package Manager, a tool for managing JavaScript packages and dependencies in Node.js applications.
• Package Management: NPM allows developers to install, update, and manage libraries and tools needed for their projects, such as Express or React.

• Dependency Management: It helps in managing project dependencies, ensuring that the correct versions of libraries are used, which is crucial for compatibility.

• ...read more
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Q4. What is the difference between framework or Library
Ans. 
A framework provides a structure for building applications, while a library offers reusable code for specific tasks.
• Inversion of Control: Frameworks dictate the flow of control, while libraries allow developers to call them as needed. Example: Angular (framework) vs. jQuery (library).

• Purpose: Frameworks are designed for building entire applications, whereas libraries focus on specific functionalities. Example: Django (...read more
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It just like like a screen test they will ask you questions based on your cv

It will hardly take 30minutes to complete the test.

It will take hardly 30 minutes to complete coding test.

Q1. A technical person will take your interview it will about 20 to 30minutes
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Q2. What is difference between list and tuple? They will ask to code for some questions?
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Contracts review and abstraction

Q1. Contracts and essential elements
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Q1. Tell me about yourself?
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Q2. Why are you the right fit for this role?
Ans. 
I possess the analytical skills, industry knowledge, and collaborative mindset essential for a successful Business Analyst.
• Strong analytical skills: I have experience in data analysis using tools like Excel and SQL, which helped my previous team identify key trends.

• Industry knowledge: I have worked in the finance sector, understanding regulatory requirements and market dynamics, which is crucial for informed decision-m...read more
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Q1. Wat was total experience
Ans. 
I have a total of 10 years of experience in various leadership roles.
• 10 years of experience in leadership roles

• Managed teams of up to 20 members

• Implemented successful strategies to improve team performance

• Led cross-functional projects and achieved desired outcomes
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Q2. Wat was ur designation
Ans. 
I was previously designated as a Senior Associate.
• My previous designation was Senior Associate.

• I had the responsibility of leading a team of 10 members.

• I was in charge of coordinating and delegating tasks to team members.

• I regularly conducted team meetings to discuss progress and address any issues.

• I ensured that team goals and targets were met within the given deadlines.

• I provided guidance and support to team members ...read more
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