Text Mercato Interview Questions and Answers

Q1. Basic array question
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Q1. Find the first circular tour that visits all petrol pumps
Ans. 
The first circular tour that visits all petrol pumps can be found using the concept of a circular linked list.
• Create a circular linked list with each node representing a petrol pump

• Calculate the difference between petrol available at each pump and the distance to the next pump

• Start from a pump where the sum of differences is positive and traverse the circular linked list until completing the tour
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First round was a aptitude test of 25 question

Q1. Oops concept in java
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Oops concept in Java refers to Object-Oriented Programming principles like inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation involves bundling data and methods that operate on the data into a single unit.

• Polymorphism allows objects to be treated as instances of their parent class.

• Abstraction hides the implementation d...read more
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Q2. Basic multi threading questions
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Q1. Code to make a pattern and explain each and every line of code
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Code to create a pattern and explain each line of code
• Start by defining the number of rows and columns in the pattern

• Use nested loops to iterate through each row and column

• Decide the pattern you want to create and use conditional statements to determine the output for each position
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Q2. Puzzle: In how many minimum cut u can cut a cake in 8 piece
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Q1. Resume based questions
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Q2. Event loop in nodejs
Ans. 
Event loop in Node.js manages asynchronous operations by executing callback functions when certain events occur.
• Event loop is responsible for handling I/O operations, timers, and callbacks in Node.js

• It allows Node.js to perform non-blocking operations efficiently

• Event loop continuously checks the event queue for new events to execute
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Q3. Javascript es6 questions
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Q1. Promises in javascript
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Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.
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