BlueBinaries Engineering and Solutions Developer Associate Interview Questions and Answers

Please inquire about the fundamentals of computer science, including object-oriented programming, data structures and algorithms, database management systems, and computer networks.

25 questions , 1 hour

1 coding , 2 logical question

Q1. For loop , 2 logical
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Q2. About final year projrct
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Medium to hard questions based on arrays, dp

Q1. Quick sort algorithm
Ans. 
Quick sort is a popular sorting algorithm that uses divide and conquer strategy.
• Divides array into smaller sub-arrays based on a pivot element

• Recursively sorts sub-arrays

• Combines sorted sub-arrays to get final sorted array

• Time complexity: O(n log n) on average, O(n^2) worst case

• Example: [3, 6, 8, 10, 1, 2, 1] -> [1, 1, 2, 3, 6, 8, 10]
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Q2. Modified rotate a matrix
Ans. 
Rotate a matrix by 90 degrees in place
• Transpose the matrix

• Reverse each row of the transposed matrix
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Q1. Java script, React JS
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Q2. Data structures and algorithms
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Online Assessment - Technical

Q1. Project Explanation
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Q2. SQL performance tuning
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Q1. Tell me about yourself, availability, visa-related questions
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Dynamic programming questions, longg time to complete the 2 questions

Problem solving : a clock with 3 hands, no numbers written, guess what it is

It was the ask mostly about DSA

Q1. Difference between Traits and Interface
Ans. 
Traits are reusable code blocks that can be mixed into classes, while interfaces define a contract that a class must follow.
• Traits can be used to add methods to a class without inheritance

• Interfaces define a set of methods that a class must implement

• A class can implement multiple interfaces, but can only inherit from one class

• Traits promote code reusability and reduce code duplication
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