Which of the following runs the JavaScript code?(a) Just In Time compiler(b) JavaScript Interpreter(c) Both Just In Time compiler and JavaScript Interpreter(d) Javascript compilerThe question was posed to me in an interview for internship.My enquiry is from Page Render BottleNecks Optimization topic in chapter Invocation and Performance Navigation of JavaScript

Which of the following runs the JavaScript code?(a) Just In Time compi

1.	Which of the following runs the JavaScript code?(a) Just In Time compiler(b) JavaScript Interpreter(c) Both Just In Time compiler and JavaScript Interpreter(d) Javascript compilerThe question was posed to me in an interview for internship.My enquiry is from Page Render BottleNecks Optimization topic in chapter Invocation and Performance Navigation of JavaScript
Answer» Right option is (B) JavaScript Interpreter To explain I would say: A JavaScript engine is a computer program that executes JavaScript (JS) CODE. The first JS engines were mere interpreters, but all relevant MODERN engines utilize just-in-time compilation for IMPROVED performance. The JavaScript Interpreter runs the JavaScript code.

Discussion

No Comment Found

Related InterviewSolutions

What does the rel attribute of a variable have when the type of file is CSS?(a) css(b) stylesheet(c) text/css(d) plainsheetThe question was asked during an online exam.I need to ask this question from Lazy Loading in portion Invocation and Performance Navigation of JavaScript
Which of the below does not belong to the Render Engine workflow?(a) Paint DOM elements(b) Parse Content(c) Build DOM nodes in render tree(d) Parse identifiersThis question was addressed to me in an interview.I need to ask this question from Page Render BottleNecks Optimization in section Invocation and Performance Navigation of JavaScript
Which of the following layer retrieves the content from the network?(a) Transport Layer(b) Application Layer(c) Network Layer(d) Physical LayerThe question was posed to me by my school principal while I was bunking the class.My question is taken from Page Render BottleNecks Optimization topic in section Invocation and Performance Navigation of JavaScript
What is the purpose of the property PerformanceTiming.navigationStart?(a) Ready to end the navigation(b) Ready to jump the navigation(c) Ready for navigation(d) Ready to changing the navigationThe question was posed to me during an online exam.Question is from Integrating the Performance Object with perfLogger topic in chapter Invocation and Performance Navigation of JavaScript
What should be the value of the type attribute of a variable if the type of file is CSS?(a) text/js/css(b) text/js(c) text/css(d) textI have been asked this question in homework.This key question is from Lazy Loading in portion Invocation and Performance Navigation of JavaScript
What is the purpose of garbage collection?(a) Removes object with many reference(b) Removes object with reference(c) Removes object with invalid reference(d) Removes object with no referenceThe question was posed to me by my school principal while I was bunking the class.The doubt is from Performance Navigation and Memory in section Invocation and Performance Navigation of JavaScript
How many properties does a prototype object have?(a) 6(b) 7(c) 8(d) 9This question was posed to me in examination.My enquiry is from Integrating the Performance Object with perfLogger topic in portion Invocation and Performance Navigation of JavaScript
What is the purpose of the timing property in the window.performance object?(a) Time of navigation event(b) Time of page load event(c) Time of navigation and page load event(d) Time of scrollingI got this question during an internship interview.This is a very interesting question from Invocation of the Performance Object topic in division Invocation and Performance Navigation of JavaScript
What is the purpose of the domLoading attribute?(a) Document exists(b) Document can load(c) Document has loaded(d) Document begins to loadI got this question in class test.My question comes from Lazy Loading topic in chapter Invocation and Performance Navigation of JavaScript
Which of the following are client-side JavaScript object?(a) Database(b) Cursor(c) Client(d) FileUpLoadI have been asked this question by my school principal while I was bunking the class.My doubt is from Script Loading topic in chapter Invocation and Performance Navigation of JavaScript

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment