This set of JavaScript Question Bank focuses on “Script Loading – II”. 1. What is the purpose of the method createDocumentFragment()? a) Creates a fragment object b) Creates a document fragment c) Creates imaginary node object d) Create a node fragment 2. What is the default value of the asyc attribute? a) 0 b) 1 … Read more
This set of Javascript Multiple Choice Questions & Answers (MCQs) focuses on “Script Loading – I”. 1. What is the purpose of script loading? a) Load Scripts programmatically b) Load JavaScript files manually c) Load JavaScript files programmatically d) Load Scripts programmatically & manually 2. What will happen if the browser encounters a script tag … Read more
This set of Javascript Multiple Choice Questions & Answers (MCQs) focuses on “Page Render BottleNecks Optimization”. 1. When does the browser stop rendering the HTML? a) Inline JavaScript block b) External JavaScript file c) Both Inline JavaScript block & External JavaScript file d) External HTML file 2. Which of the following handles painting the content … Read more
This set of JavaScript Multiple Choice Questions & Answers (MCQs) focuses on “Performance Navigation and Memory – II”. 1. How many properties are available in a memory object? a) 1 b) 2 c) 3 d) 4 2. What is a heap in JavaScript? a) Collection of Java objects b) Collection of JavaScript objects c) Collection … Read more
This set of Javascript Multiple Choice Questions & Answers (MCQs) focuses on “Performance Navigation and Memory – I”. 1. How many read-only attributes are present in the navigator object? a) 1 b) 2 c) 3 d) 4 2. Why are HTTP redirects significant? a) TCP connection available b) Complete roundtrip absent c) Complete roundtrip present … Read more
This set of JavaScript Assessment Questions and Answers focuses on “Integrating the Performance Object with perfLogger”. 1. How many properties does a prototype object have? a) 6 b) 7 c) 8 d) 9 2. Which of the following does not serialize the undefined values or objects within an object? a) JSON.string b) JSON c) JSON.stringify … Read more
This set of Basic JavaScript Questions and Answers focuses on “Invocation of the Performance Object”. 1. Which of the following property gives access to the JavaScript memory usage data? a) performance.memory b) memory(performance) c) performance(memory) d) performance() 2. What is the purpose of the timing property in the window.performance object? a) Time of navigation event … Read more
This set of Javascript Multiple Choice Questions & Answers (MCQs) focuses on “Remote Logging”. 1. Which of the following are JavaScript logging library? a) log b) loglevel c) leveljavascript d) jslogjava 2. What is the significance of the JavaScript logging library loglevel? a) Lightweight b) Unreliable c) Minimal usage d) Inconvenient 3. Which of the … Read more
This set of Javascript Multiple Choice Questions & Answers (MCQs) focuses on “Crafting the Public API”. 1. What is necessary when we need to create a new field in craft? a) Type of the input b) Type of the output c) Type of the field d) Type of argument 2. What does the getInputHtml() return? … Read more
This set of Javascript Multiple Choice Questions & Answers (MCQs) focuses on “JavaScript Benchmarking and Logging with perfLogger – II”. 1. What type of scope is present in JavaScript? a) Lexical b) Literal c) Both Lexical and Literal d) Local 2. Which function is used to stop the time logging? a) stopTimeLogging() b) stop() c) … Read more
