This document discusses JavaScript interview questions and answers. It covers topics such as what JavaScript is, how to add JavaScript to HTML, the typeof operator, the difference between null and undefined, the use of isNaN, disadvantages of JavaScript, the this keyword, the difference between == and === operators, what BOM and DOM stand for. The document provides definitions and explanations of these common JavaScript concepts and terms to help prepare for a JavaScript interview.
This year ECMA International will be ratifying the biggest update to the JavaScript language in its history. In this talk we'll look at key features already appearing in browsers as well as those coming in the near future. We'll also explore how you can begin leveraging the power of ES6 across all browsers today. If you haven't looked at JavaScript recently, you soon realize that a bigger, better world awaits.
This year ECMA International will be ratifying the biggest update to the JavaScript language in its history. In this talk we'll look at key features already appearing in browsers as well as those coming in the near future. We'll also explore how you can begin leveraging the power of ES6 across all browsers today. If you haven't looked at JavaScript recently, you soon realize that a bigger, better world awaits.
Introduction to JavaScript course. The course was updated in 2014-15.
Will allow you to understand what is JavaScript, what's it history and how you can use it.
The set of slides "Introduction to jQuery" is a follow up - which would allow the reader to have a basic understanding across JavaScript and jQuery.
In JavaScript, almost "everything" is an object.
-Booleans can be objects (if defined with the new keyword)
-Numbers can be objects (if defined with the new keyword)
-Strings can be objects (if defined with the new keyword)
-Dates are always objects
-Maths are always objects
-Regular expressions are always objects
-Arrays are always objects
-Functions are always objects
-Objects are always objects
ECMAScript is the name of the international standard that defines JavaScript. ES6 → ECMAScript 2015. Latest ECMAScript version is ES7 which is ECMAScript 2016.
Basically it is a superset of es5
Java Script is one of the most pervasive languages found on the internet and World Wide Web. Java Script is useful in making web pages more interactive. The pages can be made to react to the actions of the users in the form of special effects, both visual and otherwise.
Introduction to JavaScript course. The course was updated in 2014-15.
Will allow you to understand what is JavaScript, what's it history and how you can use it.
The set of slides "Introduction to jQuery" is a follow up - which would allow the reader to have a basic understanding across JavaScript and jQuery.
In JavaScript, almost "everything" is an object.
-Booleans can be objects (if defined with the new keyword)
-Numbers can be objects (if defined with the new keyword)
-Strings can be objects (if defined with the new keyword)
-Dates are always objects
-Maths are always objects
-Regular expressions are always objects
-Arrays are always objects
-Functions are always objects
-Objects are always objects
ECMAScript is the name of the international standard that defines JavaScript. ES6 → ECMAScript 2015. Latest ECMAScript version is ES7 which is ECMAScript 2016.
Basically it is a superset of es5
Java Script is one of the most pervasive languages found on the internet and World Wide Web. Java Script is useful in making web pages more interactive. The pages can be made to react to the actions of the users in the form of special effects, both visual and otherwise.
Interpreted programming or scripting language from Netscape.
Easier to code than the compiled languages like C and C++.
Lightweight and most commonly used script in web pages.
Allow client-side user to interact and create dynamic pages.
Cross-platform and object-oriented scripting language.
Most popular programming language in the world.
What is JavaScript?
Interpreted programming or scripting language from Netscape.
Easier to code than the compiled languages like C and C++.
Lightweight and most commonly used script in web pages.
Allow client-side user to interact and create dynamic pages.
Cross-platform and object-oriented scripting language.
Most popular programming language in the world.
High level, dynamic and untyped programming language.
Standardized in the ECMAScript language specification.
Used for shorter programs
Takes longer time to process than compiled languages.
Making Visualforce RemoteActions Bulletproof with TypeScriptSimon Goodyear
My Dreamforce '15 presentation which discusses how we can use TypeScript in Visualforce. The video is here; http://salesforce.vidyard.com/watch/XT20D_JUgU4jBe5SjHy_Rg
RemoteAction Apex methods have helped make Visualforce pages more responsive by allowing us to use more JavaScript and still connect easily to our Apex business logic. But with this power comes the brittleness of JavaScript's untyped nature and the disconnect between JavaScript and Apex methods. The errors caused by these issues are runtime errors, which can slow development down. To catch these errors at compile time, the Tooling API can be used to generate TypeScript proxies for RemoteActions. Join us to learn what TypeScript is, how to use it in Visualforce, and see concrete examples of how to generate proxies for Apex RemoteActions.
PiterPy #3 talk (Video: https://youtu.be/bCwSyyygSmM). Some points on RAML, general overview and takeaways based on a real project.
Presented with Dmitry Nazarov https://ru.linkedin.com/in/aspectmkn8rd/en (Part 2, as mentioned in contents)
Java is a programming language designed for use in the distributed environment of the Internet.
Programming language developed for the Web.
Programming language Developed by James Gosling.
Sun Microsystems released java in 1995 as a core component of Sun Java technology.
Java is very versatile, efficient, platform independent and secure.
Java is write once and run anywhere.
About 2 billion Devices using Java in various applications.
Java is used in Embedded devices, Mobile phones, Enterprise Servers, Super computers, Web Servers and Enterprise Appls.
These features makes java technology ideal for network computing.
How can JAVA Performance tuning speed up applications.pdfMindfire LLC
Java optimization identifies misbehaving or underperforming code, configurations, frameworks, libraries, and, potentially, even hardware. When you identify a component as an optimization target, you can rework and retest the system.
If the Java performance optimization target is remediated, the system as a whole will perform better.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
2. 1. What is JavaScript?
JavaScript is a scripting language with the
OOPs( object-oriented language )
capability. It is used to create dynamic
pages but nowadays JavaScript is also
as a server-side scripting language.
3. 2. How to add JavaScript in an
HTML file?
We use a script tag to add a
JavaScript file in an HTML file.
for example:-
<script src=“filename.js”></script>
4. 3. What is the use of the typeof
operator?
To check the type of variable in
JavaScript we use the typeof
operator.
5. 4. Difference between null and
undefined in JavaScript.
Null: The value of the variable is
purposely absent.
undefined: the value of the variable
does not exist in Program.
6. 5. What is the use of isNaN?
isNaN( is Not a Number ) is
used to check whether a
is a number or not. If the
value is a number then it
returns false otherwise it
returns true.
7. 6. Disadvantages of using
JavaScript?
Client-side JavaScript does not
allow us to read or write data in
files. Because of security reasons.
Also, JavaScript doesn't support
multithreading.
8. 7. What is the "this" keyword in
JavaScript?
JavaScript is more famous for the
"this" keyword. "this" keyword
to the object where it was
9. 8. What is the difference between
== and === operator?
== operator compare the value of
two operands but === operator
compares the value as well as the
type of operands.
10. 9. What is BOM?
BOM stands for Browser Object
Model. Using it we can interact
with Browser.
11. 10. What is DOM?
DOM stands for Document
Object Model. Using it we can
manipulate HTML files.
