BlackBuck Software Development Engineer Intern Interview Questions and Answers

Q1. What is encapsulation in OOP?
Ans. 
Encapsulation is the concept of bundling data and methods together within a class, hiding internal details from the outside world.
• Encapsulation helps in achieving data abstraction and data hiding.

• It allows for better control over the access to the internal state of an object.

• By encapsulating data, we can protect it from being modified by external code.

• Encapsulation promotes code reusability and maintainability.

• Example:...read more
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Q1. LRU Cache - how to tackle
Ans. 
LRU Cache is a data structure that maintains a list of items in order of most recently used to least recently used.
• Implement using a doubly linked list and a hashmap for efficient operations

• When an item is accessed, move it to the front of the list

• When the cache is full, remove the least recently used item from the end of the list
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Q2. LRU Cache implementation based on a real time system. How would the main work which will be called etc etc
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Easy to medium questions, Questions on DSA and Node.js.

Q1. Valid parenthesis
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Q2. Three sum problem
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Q1. The question was about Nodejs
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Q2. The question was to build a linked list in Nodejs
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Q1. The first question was related to DSA
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Q2. The question was related to SQL
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Questions were crayon box ,the bot and the game and happy neighbourhood for 90 mins

Q1. Array basics was asked
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Q2. Segment tree,prefix sum
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Q1. Low level design was asked
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Q1. How was your previous organization
Ans. 
My previous organization was a fast-paced tech startup focused on developing cutting-edge software solutions.
• Highly collaborative work environment

• Emphasis on innovation and creativity

• Agile development methodologies were followed

• Regular team meetings and code reviews

• Opportunities for professional growth and learning
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Q2. Please create timer using react
Ans. 
Create a timer using React
• Use useState hook to store the timer value

• Use useEffect hook to update the timer every second

• Display the timer value in the component's render method
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Q1. Slicing in List of Python
Ans. 
Slicing in Python allows you to extract a subset of elements from a list.
• Slicing is done using square brackets and the start:stop:step notation.

• The start index is inclusive, while the stop index is exclusive.

• You can omit any of the three parameters, defaulting to 0 for start, length of list for stop, and 1 for step.

• Negative indices can be used to slice from the end of the list.

• Example: list = [1, 2, 3, 4, 5], list[1:4]
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Q2. Multithreading questions were asked
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Coding test with Java and dsa questions

Q1. Core Java Questions
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Q2. Maximum subbarray
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