10+ Unicommerce Esolutions Interview Questions and Answers

ES6 features like object destructuring, arrow functions, array methods

• Object destructuring allows for easy extraction of values from objects

• Arrow functions provide a concise syntax for writing functions

• Array.filter() allows for filtering of elements based on a condition

• Array.reduce() allows for reducing an array to a single value

• Array.indexOf() returns the index of the first occurrence of a specified element

Use CSS to set margin to auto for horizontal centering and text-align center for vertical centering.

• Set the parent div's display property to flex and justify-content to center

• Set the child div's margin property to auto

• Alternatively, set the parent div's text-align property to center and child div's display property to inline-block

Data can be transferred between components in Angular using @Input and @Output decorators.

• Use @Input decorator to pass data from parent to child component

• Use @Output decorator to emit events from child to parent component

• Use EventEmitter to emit custom events

• Use ViewChild to access child component's properties and methods

Var, let, const are used to declare variables in JavaScript. 'use strict' enables strict mode.

• Var is function-scoped and can be redeclared. Let and const are block-scoped and cannot be redeclared.

• Let allows reassignment while const does not.

• 'use strict' enables strict mode which enforces stricter rules and better error handling.

• Example: var x = 10; let y = 20; const z = 30;

• Example: 'use strict';

Pseudo classes are keywords used in CSS to select and style elements based on their state or position in the document.

• Pseudo classes start with a colon (:) followed by the keyword

• They are used to style elements based on their state, such as :hover, :active, :focus

• They can also be used to select elements based on their position in the document, such as :first-child, :last-child

• Pseudo classes can be combined with other selectors to create more specific styles

async/await in script tag is used to load external scripts asynchronously without blocking the page.

• async/await allows scripts to be loaded asynchronously without blocking the page

• It is useful for loading external scripts that may take time to load

• It improves page performance by not blocking the rendering of the page

• It is supported in modern browsers

CSS Box model is a design concept that describes how elements are displayed on a webpage.

• Every HTML element is a rectangular box

• The box has content, padding, border, and margin

• Width and height of the box are determined by content, padding, and border

• Margin is the space outside the border

• Box-sizing property can be used to change the box model

Backend refers to the server-side of an application where data is stored and processed.

• Backend is responsible for managing databases, server-side logic, and ensuring smooth communication between the server and the client.

• Common backend technologies include Node.js, Python, Ruby on Rails, and Java.

• Backend developers work on creating APIs, handling user authentication, and optimizing server performance.

• Understanding backend technologies is crucial for ensuring the overall funct...read more

Frontend refers to the user interface of a website or application that users interact with.

• Frontend development involves using languages like HTML, CSS, and JavaScript to create the visual elements of a website or application.

• Frontend frameworks like React, Angular, and Vue.js are commonly used to streamline development and enhance user experience.

• Responsiveness, accessibility, and performance optimization are key considerations in frontend development.

• Frontend developers wor...read more

Abstract class can have implementation while interface only has method signatures.

• Abstract class can have constructors while interface cannot.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract class can have non-public members while interface only has public members.

• Abstract class is used for creating a base class for other classes while interface is used for defining a contract that a class must follow.

• Example of abstract class: p...read more

The median of two sorted arrays can be found by merging the arrays and then calculating the median.

• Merge the two sorted arrays into a single sorted array

• Calculate the median of the merged array

• Handle cases where the total number of elements is even or odd

E-commerce refers to buying and selling goods or services online.

• E-commerce involves online transactions between businesses and consumers.

• It includes activities such as online shopping, electronic payments, and digital marketing.

• Popular examples of e-commerce platforms include Amazon, eBay, and Shopify.

A warehouse is a large building used for storing goods and materials.

• Warehouses are used by businesses to store inventory and fulfill orders.

• They often have loading docks for trucks to deliver and pick up goods.

• Warehouses can be organized using various systems such as FIFO (First In, First Out) or LIFO (Last In, First Out).

C is a low-level programming language while Java is a high-level programming language.

• C is compiled while Java is interpreted

• C has pointers while Java does not

• Java has automatic garbage collection while C does not

• Java is platform-independent while C is platform-dependent

• Java has built-in support for multithreading while C does not