BlackBuck Software Developer Interview Questions and Answers

Q1. Explain Deadlock?
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Q2. Explain Red Black Tree?
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Q3. Find local minima in a 1-D array?
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Q4. Find local minima in 2-D array?
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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 level to Medium level

2 Easy questions of DSA

Q1. One DSA question
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Q2. Normal discussion about tech stack
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Q1. Tell about yourself
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Q2. Why do you want to join digit?
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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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It was a coding round where i need to solve 3 DSA Questions in 1.5 hour

Q1. This is Technical round where i was asked to implement the Two Question of Dsa one is bases on greedy and another is dp , another one is leetcode hard (finding maxaimal area of rectangle in matrix of 1 and...read more
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Q2. Greedy Q was direct i don't remember clearly. I was selected for the 2nd round
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Q1. It was also a technical round but bases on LLD problem statement. I was given a problem statement to design a society security system and the they need psudo code for complete implementation using correct ...read more
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Q1. I was not selected for 4th round but heard that there were Q on cs fundamentals.
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Q1. It was lld question to design a cab booking system.
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Q2. Tell me about yourself
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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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