Amazon Web Services Web Developer Interview Questions and Answers

A closure is a function that has access to its outer function's variables, even after the outer function has returned.

• A closure is created when a function is defined inside another function.

• It allows for private variables and functions in JavaScript.

• Closures are used for data hiding, encapsulation, and creating modules.

• Example: function outer() { var x = 10; function inner() { console.log(x); } return inner; } var clos

Basic structure of an HTML page includes doctype declaration, html, head, and body tags.

• DOCTYPE declaration specifies the HTML version

• HTML tag wraps the entire content of the page

• Head tag contains meta information, title, and links to external resources

• Body tag contains the visible content of the page

Padding is the space inside an element, while margin is the space outside an element.

• Padding is used to create space between an element's content and its border.

• Margin is used to create space between an element's border and the adjacent elements.

• Padding is affected by the background color of the element, while margin is not.

• Padding can be set individually for each side of an element (top, right, bottom, left), while ma...read more

Box Model is a concept in CSS where every element is treated as a box with content, padding, border, and margin.

• Box Model consists of content, padding, border, and margin.

• Content is the actual content of the box.

• Padding is the space between the content and the border.

• Border is the line that goes around the padding and content.

• Margin is the space outside the border.

Directives in Angular are markers on DOM elements that tell Angular to attach a specified behavior to that element.

• There are three types of directives in Angular: Component, Structural, and Attribute.

• Component directives are used to create reusable UI components.

• Structural directives are used to change the structure of the DOM.

• Attribute directives are used to change the appearance or behavior of an element.

• Examples of ...read more

JIT compiles code at runtime while AOT compiles code before runtime.

• JIT stands for Just-In-Time compilation and compiles code at runtime.

• AOT stands for Ahead-Of-Time compilation and compiles code before runtime.

• JIT is used in Java Virtual Machine (JVM) while AOT is used in languages like C and C++.

• JIT can result in slower startup time but faster execution while AOT can result in faster startup time but slower execution...read more

Abstract class is a class that cannot be instantiated and is used as a base class for other classes.

• An abstract class can have abstract and non-abstract methods.

• Abstract methods have no implementation and must be implemented by the derived class.

• An abstract class can have constructors and fields.

• An abstract class can be used to define a common interface for a group of related classes.

• Example: Animal is an abstract clas...read more

I am a software developer with experience in various programming languages and a passion for creating innovative solutions.

• Proficient in Java, C++, and Python

• Experience with web development using HTML, CSS, and JavaScript

• Familiarity with agile development methodologies

• Strong problem-solving and analytical skills

• Excellent communication and teamwork abilities

Array is a collection of elements of same data type. Linked list is a data structure where each element points to the next one.

• Arrays have fixed size, linked lists can grow dynamically

• Accessing elements in an array is faster than in a linked list

• Inserting or deleting elements in a linked list is faster than in an array

• Arrays are stored in contiguous memory locations, linked lists are not

• Arrays are used for random acces

The OSI model is a conceptual model that describes the communication functions of a telecommunication or computing system.

• The OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has a specific function and communicates with the layers above and below it.

• The Physical layer deals with the physical transmission of data, while the Application layer deals with u...read more

The OSI model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system.

• The OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has a specific function and communicates with the layers above and below it.

• The Physical layer deals with the physical transmission of data, while the Applicati...read more