Krios info Solution IOS Developer Interview Questions and Answers

Aptitude+CS fundamentals questions were asked

4 questions majorly based on trees and linked list

Again 3 ques 1 was based on trees,another in linked list and 3rd on kadanes algorithm

Q1. Left view of tree
Ans. 
Left view of a tree is the set of nodes visible when the tree is viewed from the left side.
• Traverse the tree in a level order manner

• Keep track of the first node encountered at each level

• Add the first node encountered at each level to the result array
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Q2. Riddle based question
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Q3. Detect a loop in linked list
Ans. 
Use Floyd's Tortoise and Hare algorithm to detect a loop in a linked list.
• Initialize two pointers, slow and fast, at the head of the linked list.

• Move slow pointer by one step and fast pointer by two steps.

• If they meet at any point, there is a loop in the linked list.
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Q1. Basic C and C++ mcqs
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Q2. Function, pointers , time complexity
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All multiple-choice questions on object-oriented programming and pointers.

Questions related to linked lists and trees.

Three questions, all regarding LinkedIn, focusing on lists and trees.

It was an 1 hour round with pseudocodes of c different subject questions and it was an objective test

It was difficult with question of medium to hard level

It is very impressive work on Josh technology assessment because we learn many new skills.

Q1. What is api and how it is work ?
Ans. 
API stands for Application Programming Interface. It is a set of rules and protocols that allows different software applications to communicate with each other.
• APIs define the methods and data formats that applications can use to request and exchange information.

• APIs can be used to access services provided by other software applications, such as retrieving data from a database or sending notifications.

• Examples of APIs ...read more
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Q2. What is software development life cycle and which steps are following?
Ans. 
Software development life cycle (SDLC) is a process used by software developers to design, develop, and test software.
• 1. Planning: Define the project scope, requirements, and objectives.

• 2. Analysis: Gather and analyze user requirements.

• 3. Design: Create a detailed design of the software.

• 4. Implementation: Develop the software based on the design.

• 5. Testing: Test the software for bugs and issues.

• 6. Deployment: Release t...read more
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They would ask searching sorting , binary search in first round

Q1. Most of question were from Tree and DP
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Q2. Delete a node from a binary tree.
Ans. 
Delete a node from a binary tree.
• Find the node to be deleted

• If the node has no children, simply delete it

• If the node has one child, replace it with its child

• If the node has two children, find the minimum value in its right subtree, replace the node with that value, and delete the minimum value node
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Duration 1 hour
Data structure and algorithms

Duration 1.5 hour
Data structure and algorithms

Q1. Given a value find next sibling on right side of it without using global/heap variables
Ans. 
Use a binary tree traversal algorithm to find the next sibling on the right side of a given value.
• Implement an in-order traversal algorithm to traverse the binary tree

• Keep track of the parent node and the direction of traversal to find the next sibling on the right side

• If the given value is the right child of its parent, move up the tree until finding a node that is the left child of its parent
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Questions related to input and output.

Subjective Round:4 questions related to coding.

Q1. 3 Interview round and finally HR round
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