iOTA Infotech Business Head Interview Questions and Answers

Q1. Interviewer asked me to tell about the ternary operator in Kotlin.
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Q2. How WhatsApp is generating money.
Ans. 
WhatsApp generates money through its business API and WhatsApp Business app.
• WhatsApp Business API charges businesses for sending messages to customers.

• WhatsApp Business app offers tools for small businesses to communicate with customers more effectively.

• WhatsApp also plans to introduce ads in the Status feature to generate revenue.
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Q1. React hooks related How to use them
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Q2. About web socket real time messaging
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Q3. About react router dom
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Aptitude test question logical reasoning and cheking availablity.

It's test last test and skill related to C ,Java, HTML

Before Aptitude Test, There was a telephonic interview round in which they test your communication and ask questions about your education and projects. You just have to show your confidence to pass this round. After that, the aptitude test was quite easy. There are 15 questions all are doable in just 15 to 20 minutes of time span.

After that, The coding round takes place in which they provide you with a device with an online compiler of your preferred programming language and ask you to solve 4 questions without using any built-in function. The questions are based on Linked Lists, Stacks, Arrays, etc. You have to do it all manually. This round lasts up to 1 hour.

Q1. The technical round takes place in which they ask different questions from your coding round, a few concept-based ones, and also a few questions to test your thinking and problem-solving abilities like the...read more
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Easy aptitude test containing mathematics and logical questions

4 leetcode easy to medium level

Q1. Questions on project and tech stack.
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4 Coding Questions Were Given.
Check Palindrome String
Longest Increasing Subsequence
Group Anagrams
Add Two Numbers(Linked List)

Questions were picked from leetcode but the restriction of not using any inbuild function made them difficult to solve in the given time frame.

Q1. Basic Java Technical Questions
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Q2. Throws Vs Throw
Ans. 
Throws is used for checked exceptions in Java, while throw is used to explicitly throw an exception.
• Throws is used in method signature to declare that the method may throw a checked exception.

• Throw is used to actually throw an exception in the code.

• Example: public void method() throws IOException { //code }

• Example: throw new IOException();
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Q3. Method Overriding Basics and Output-Based Questions
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Q4. Springboot annotations
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Q5. Inheritance and Concept of Abstract Classes and Interfaces
Ans. 
Inheritance allows a class to inherit properties and behaviors from another class. Abstract classes cannot be instantiated and can have abstract methods. Interfaces define a contract for classes to implement.
• Inheritance allows a class to inherit properties and behaviors from another class

• Abstract classes cannot be instantiated and can have abstract methods

• Interfaces define a contract for classes to implement
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Q1. Find the second most occurrence if string in JavaScript
Ans. 
Find the second most occurrence of a string in an array of strings in JavaScript.
• Create a map to store the count of each string in the array

• Sort the map by values in descending order to find the most occurrence

• Return the key of the second element in the sorted map
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