10+ Royal Institute of Technology & Science Interview Questions and Answers

The best sorting algorithm depends on the specific use case and the characteristics of the data.

• The best sorting algorithm for small arrays is often insertion sort due to its simplicity and efficiency.

• For larger arrays, merge sort or quicksort are commonly used due to their average-case time complexity of O(n log n).

• If the data is nearly sorted, algorithms like bubble sort or insertion sort can perform well.

• If the data contains many duplicate elements, counting sort or radix ...read more

Merge sort is a divide-and-conquer algorithm that recursively divides the array into halves and merges them in sorted order.

• Merge sort has a time complexity of O(n log n), where n is the number of elements in the array.

• The algorithm divides the array into halves until each subarray has only one element.

• Then, it merges the subarrays in sorted order, resulting in a sorted array.

• The merging process takes O(n) time for each level of recursion.

• Since the array is divided into halve...read more

Estimating the number of trees in Chennai is a complex task due to the city's size and diverse landscapes.

• Chennai is a large city with a mix of urban, suburban, and rural areas, each with varying tree densities.

• To estimate the number of trees, we can consider factors such as land area, tree cover percentage, and population density.

• Satellite imagery and remote sensing techniques can be used to analyze tree cover in different regions of Chennai.

• Local government records and surv...read more

Virtual DOM is a lightweight copy of the actual DOM. React uses it to efficiently update the UI.

• Virtual DOM is a JavaScript representation of the actual DOM.

• It is a lightweight copy of the actual DOM tree.

• React uses the virtual DOM to minimize the number of changes needed to update the UI.

• When a component's state changes, React creates a new virtual DOM tree and compares it with the previous one.

• React then updates only the parts of the actual DOM that have changed, resulting ...read more

JavaScript has 7 different data types including number, string, boolean, null, undefined, object, and symbol.

• Number: represents numeric values

• String: represents textual values

• Boolean: represents true/false values

• Null: represents intentional absence of any object value

• Undefined: represents an uninitialized value

• Object: represents a collection of properties

• Symbol: represents a unique identifier

JSX is a syntax extension for JavaScript used in React to describe the UI.

• JSX allows writing HTML-like code in JavaScript

• Functional components are stateless and return JSX elements

• Class components have state and lifecycle methods

• Functional components are simpler and easier to test

• Class components are more powerful and flexible

React is a JavaScript library for building user interfaces.

• React allows developers to create reusable UI components.

• It uses a virtual DOM to efficiently update the UI.

• React uses a unidirectional data flow, making it easier to debug and reason about code.

• Keys in React are used to give each element in an array a stable identity, improving performance when updating the UI.

NaN property in JavaScript stands for Not a Number.

• It is a value of the global object.

• It is returned when a mathematical operation fails or is undefined.

• It is not equal to any value, including itself.

• It can be checked using the isNaN() function.

API is a set of protocols and tools for building software applications. Automation can be done using tools like Postman, SoapUI, etc.

• API stands for Application Programming Interface

• It is a set of protocols and tools for building software applications

• APIs allow different software applications to communicate with each other

• APIs can be automated using tools like Postman, SoapUI, etc.

• Automation of APIs involves writing scripts to test the functionality of the API

• API automation to...read more

Object-oriented programming concepts that focus on classes and objects

• Encapsulation: bundling data and methods that operate on the data into a single unit (class)

• Inheritance: ability of a class to inherit properties and behavior from another class

• Polymorphism: ability to present the same interface for different data types

• Abstraction: hiding the complex implementation details and showing only the necessary features