Spinny Backend Developer Interview Questions and Answers

Q1. Explain custom object sorting in java
Ans. 
Custom object sorting in Java involves implementing the Comparable interface or using a Comparator to define the sorting logic.
• Implement the Comparable interface in the custom object class and override the compareTo() method to define the natural ordering.

• Alternatively, create a separate class that implements the Comparator interface and override the compare() method to define custom sorting logic.

• Use the Collections.s...read more
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Q2. Mostly on SQL queries
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Q1. Project explanation
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Q2. SQL queries like joins,duplicate removal,sorting
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Questions from trees and linkedin

Q1. Question on dsa and on oops
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Q2. Reverse linked list with multiple approach
Ans. 
Reverse a linked list using multiple approaches.
• Iterative approach: Use three pointers to reverse the links between nodes.

• Recursive approach: Recursively reverse the rest of the list and adjust the links.

• Stack approach: Push all the nodes onto a stack and then pop them to create the reversed list.
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2 hours coding round, only 1 person out of 90 cleared

Q1. Asked loads of dsa, super technical questions
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Nothing much compulsary field

Q1. Question based on DS and algo
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Q2. What is array? how to use it?
Ans. 
An array is a data structure that stores a collection of elements of the same type in a contiguous block of memory.
• Arrays are indexed starting at 0, with each element accessible by its index.

• Arrays can be used to store and manipulate multiple values of the same data type.

• Example: String[] names = {"Alice", "Bob", "Charlie"};
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Q3. Why glassdoor force to write question
Ans. 
Glassdoor may require users to write questions to encourage engagement and gather feedback.
• Encourages user engagement and feedback

• Helps improve the overall user experience on the platform

• Allows users to share their thoughts and opinions

• Can lead to valuable insights for Glassdoor to enhance their services
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