Hectronic India Retail Parking Automation Interview Questions and Answers

Coding questions around android

Q1. Data structures questions
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Q2. Binary sort in array
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Binary sort is a search algorithm that finds the position of a target value within a sorted array.
• Binary sort works by repeatedly dividing the array in half and narrowing down the search range.

• It is more efficient than linear search for large arrays.

• Example: Sorting an array of strings alphabetically using binary sort.
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Q3. Android intent and broadcasts
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Q1. It was a DS round, he asked me about queue and internals of Hash Map in java and them android questions on work manager and MVVM
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Q1. It was Android Fundamentals round, was asked on my work in current company and architectures.
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Q1. It was a round with director, was asked a HLD question on how to create a driver monitoring app to calculate speed and then on how to design an app like blinkit.
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Q1. Explain hoisting in js
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Hoisting in JavaScript is the behavior where variable and function declarations are moved to the top of their containing scope during the compilation phase.
• Variable declarations are hoisted to the top of their scope, but not their assignments.

• Function declarations are fully hoisted, meaning they can be called before they are declared.

• Hoisting can lead to unexpected behavior if not understood properly.
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Q2. Explain closures in js
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Closures in JavaScript allow functions to access variables from their outer scope even after the outer function has finished executing.
• Closures are created when a function is defined within another function and the inner function has access to the outer function's variables.

• Closures can be used to create private variables and functions in JavaScript.

• Closures can also be used to maintain state in asynchronous operations
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Q1. Javascript polyfills
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Round duration - 60 Minutes
Round difficulty - Easy

Formal Introduction.
Asked About Projects.
Difference between SQL and NoSQL. Pros and Cons. Where should we use SQL and NoSQL.
Given a problem, I have to make a SQL Database structure and then interviewer told me to convert it into NoSQL.
asked coding questions

Q1. 
Search In Rotated Sorted Array Problem Statement
Given a sorted array of distinct integers that has been rotated clockwise by an unknown amount, you need to search for a specified integer in the array. Fo...read more
Ans. 
Implement a search function to find a specified integer in a rotated sorted array.
• Implement a binary search algorithm to find the target integer in the rotated sorted array.

• Handle the cases where the target integer may lie in the left or right half of the rotation.

• Keep track of the mid element and adjust the search range based on the rotation.

• Return the index of the target integer if found, else return -1.
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Q2. 
Zigzag Binary Tree Traversal Problem
Given a binary tree, compute the zigzag level order traversal of the node values in the tree. The zigzag traversal requires traversing levels from left to right, then ...read more
Ans. 
Zigzag level order traversal of a binary tree is computed by alternating between left to right and right to left traversal at each level.
• Use a queue to perform level order traversal of the binary tree.

• Maintain a flag to switch between left to right and right to left traversal at each level.

• Store the node values in a list while traversing and alternate the order based on the flag.

• Example: For input 1 2 3 4 -1 5 6 -1 7 -...read more
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Q1. First of all HR we will connect Each other.
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Q2. After that he will give me the company introduction of the company.
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Q3. Hr will discuss to conduct their interview. discuss for the timing
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Q4. Hr relted to question for the relince
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Related to question for the aptitude test

Q1. Introduction, Retail experience, Location que, Family background, English
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Q1. Numbers on current work
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Q1. Technical questions & Answers
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