BlueBinaries Engineering and Solutions Software Development Engineer Interview Questions and Answers

Java internals, coding questions 2sum

Q1. Hld of your previous project
Ans. 
Developed a web-based project management tool for tracking tasks and deadlines.
• Used React.js for front-end development

• Implemented RESTful APIs for backend using Node.js and Express

• Utilized MongoDB for database storage

• Incorporated authentication and authorization features for user security
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Q2. Question related to self build projects
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Q1. Salary negotiation
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Q2. Location constrain if any
Ans. 
Open to relocation for the right opportunity
• Willing to relocate for the right job opportunity

• Flexible with location for the right role

• Open to considering different locations for the right position
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Please inquire about the fundamentals of computer science, including object-oriented programming, data structures and algorithms, database management systems, and computer networks.

DSA, SQL, Problem Solving, Technical, Data Structures and Algorithms

Q1. Write an SQL Query for retrieving something
Ans. 
SQL query to retrieve data from a database
• Use SELECT statement to specify the columns to retrieve

• Use FROM clause to specify the table to retrieve data from

• Use WHERE clause to filter the results based on conditions
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Q2. Write a program to achieve something
Ans. 
Program to sort an array of integers in ascending order
• Use a sorting algorithm like bubble sort, selection sort, or insertion sort

• Iterate through the array and compare adjacent elements to swap if necessary

• Repeat the process until the array is sorted
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Q1. Move negative elements to right side of array
Ans. 
Move negative elements to right side of array
• Iterate through the array and swap negative elements to the right side

• Use two pointers approach to keep track of positive and negative elements

• Maintain the order of elements while moving negatives to the right side
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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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Coding is important three problems and mcqs of java and testing

Q1. Oops concepts were asked
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Q2. Java questions static jvm and all
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Number series , probablity , relations

String, pattern and one prime number questions

Q1. Bit and byte comparison
Ans. 
A bit is the smallest unit of data in computing, while a byte is made up of 8 bits.
• A bit can have a value of 0 or 1, representing off or on respectively.

• A byte is made up of 8 bits, allowing for a larger range of values (0-255).

• Bytes are commonly used to represent characters in text, with each character typically taking up one byte.

• Bits are often used in Boolean logic operations and for representing binary numbers.
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Q2. About projects and roles
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Q1. Asked about the family background
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Q2. About company and their projects
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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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