Independent Contractor Services Software Engineer II Interview Questions and Answers

Basic questions also with coding test

Coding questions asked in this round

Q1. Oops concept amd design patterns asked
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Q2. Explain Singleton design pattern.
Ans. 
Singleton design pattern restricts the instantiation of a class to one object.
• Ensures only one instance of a class exists in the system

• Provides a global point of access to that instance

• Used when only one instance of a class is required throughout the system

• Example: Database connection manager, Logger class
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Q3. Explain oop concepts class, encapsulation etc
Ans. 
OOP concepts include class, encapsulation, inheritance, and polymorphism.
• Class is a blueprint for creating objects with shared properties and methods.

• Encapsulation is the practice of hiding implementation details and exposing only necessary information.

• Inheritance allows a class to inherit properties and methods from a parent class.

• Polymorphism allows objects to take on multiple forms or behaviors depending on the cont...read more
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Q1. Find the missing smallest positive integer
Ans. 
Find the missing smallest positive integer in an array of integers
• Sort the array to easily identify missing integers

• Iterate through the sorted array to find the smallest missing positive integer

• Return the missing integer
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Q2. Given an array of 0,1,2, Sort the array
Ans. 
Sort an array of strings containing only 0, 1, and 2.
• Use a three-way partitioning algorithm like Dutch National Flag algorithm to sort the array in a single pass.

• Keep track of three pointers - low, mid, and high to partition the array into three sections.

• Swap elements based on their values to achieve the sorted array.
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Easy Binary search and tree questions were asked

Q1. Binary search on rotated array
Ans. 
Binary search on rotated array involves finding a target element in a sorted array that has been rotated.
• Find the pivot point where the array is rotated

• Determine which half of the array the target element lies in

• Perform binary search on the appropriate half of the array
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Q2. ACID in dbms was asked
Ans. 
ACID is a set of properties that guarantee database transactions are processed reliably.
• ACID stands for Atomicity, Consistency, Isolation, Durability.

• Atomicity ensures that all operations in a transaction are completed successfully or none at all.

• Consistency ensures that the database remains in a consistent state before and after the transaction.

• Isolation ensures that multiple transactions can be executed concurrently ...read more
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Q1. General DSA question leetcode style
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Q1. Discussion on previous project
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It was a machine coding round

Q1. Similar to the other question
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Q2. Give an array and an element sort the array with difference of that number to array elements
Ans. 
Sort an array of strings by the difference of a given element to each array element.
• Iterate through the array and calculate the absolute difference between the given element and each array element.

• Sort the array based on the calculated differences.

• Return the sorted array.
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3 questions easy-medium level leetcode problem I solved 2 completely and 3rd question partially (9/15 test cases passed) to move on to 2nd round

Q1. Implement an app similar to splitwise
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