JavaScript Executor in Selenium with Java MCQ

 MCQs on JavaScript Executor in Selenium with Java

What is the purpose of the JavaScriptExecutor in Selenium WebDriver?

a) To execute SQL queries

b) To execute JavaScript commands in the context of the browser

c) To manage browser cookies

d) To handle browser pop-ups

Answer: b) To execute JavaScript commands in the context of the browser

Which interface must be implemented to use JavaScriptExecutor in Selenium?

a) WebDriver

b) TakesScreenshot

c) JavascriptExecutor

d) WebElement

Answer: c) JavascriptExecutor

How do you cast a WebDriver instance to use JavaScriptExecutor in Selenium Java?

a) JavascriptExecutor js = (JavascriptExecutor) driver;

b) JavaScriptExecutor js = (JavaScriptExecutor) driver;

c) jsExecutor js = (jsExecutor) driver;

d) ScriptExecutor js = (ScriptExecutor) driver;

Answer: a) JavascriptExecutor js = (JavascriptExecutor) driver;

Which method is used to execute JavaScript commands using JavaScriptExecutor?

a) runScript(String script)

b) executeScript(String script)

c) performScript(String script)

d) executeJavaScript(String script)

Answer: b) executeScript(String script)

What is the correct JavaScriptExecutor syntax to scroll to the bottom of the page?

a) js.executeScript("window.scrollTo(0, document.body.scrollHeight)");

b) js.executeScript("window.scrollToBottom()");

c) js.executeScript("scroll(0, end)");

d) js.executeScript("document.scrollTo(0, document.body.scrollHeight)");

Answer: a) js.executeScript("window.scrollTo(0, document.body.scrollHeight)");

Which JavaScriptExecutor method is used to click an element that is not interactable by WebDriver's click() method?

a) executeClick()

b) performClick()

c) executeScript("arguments[0].click();", element);

d) element.clickUsingJS()

Answer: c) executeScript("arguments[0].click();", element);

How can you retrieve the inner text of an element using JavaScriptExecutor?

a) js.executeScript("return arguments[0].innerText;", element);

b) js.executeScript("getText(arguments[0]);", element);

c) js.executeScript("arguments[0].getText();", element);

d) js.executeScript("getInnerText(arguments[0]);", element);

Answer: a) js.executeScript("return arguments[0].innerText;", element);

Which of the following JavaScriptExecutor methods scrolls the page until a specified element is in view?

a) js.executeScript("window.scrollIntoView(arguments[0]);", element);

b) js.executeScript("arguments[0].scrollIntoView();", element);

c) js.executeScript("scrollToView(arguments[0]);", element);

d) js.executeScript("scrollElementIntoView(arguments[0]);", element);

Answer: b) js.executeScript("arguments[0].scrollIntoView();", element);

How would you highlight a web element using JavaScriptExecutor?

a) js.executeScript("arguments[0].highlight();", element);

b) js.executeScript("arguments[0].style.border='3px solid red'", element);

c) js.executeScript("highlight(arguments[0]);", element);

d) js.executeScript("arguments[0].setBorder('red');", element);

Answer: b) js.executeScript("arguments[0].style.border='3px solid red'", element);

What is the output type of the executeScript method when used to return the title of the current webpage?

a) String

b) WebElement

c) Object

d) void

Answer: a) String

Which JavaScriptExecutor method would you use to retrieve the current URL of the webpage?

a) js.executeScript("return window.location.href");

b) js.executeScript("getCurrentUrl();");

c) js.executeScript("return document.URL;");

d) Both a) and c)

Answer: d) Both a) and c)

In Selenium, which method allows you to set the value of an input field using JavaScriptExecutor?

a) js.executeScript("arguments[0].setValue('value');", element);

b) js.executeScript("arguments[0].value='new value';", element);

c) js.executeScript("arguments[0].setAttribute('value', 'new value');", element);

d) js.executeScript("setValue(arguments[0], 'new value');", element);

Answer: b) js.executeScript("arguments[0].value='new value';", element);

How can JavaScriptExecutor help in handling the "Element is not clickable at point" exception in Selenium?

a) By scrolling the element into view before clicking

b) By using Actions class

c) By refreshing the browser

d) By resizing the browser window

Answer: a) By scrolling the element into view before clicking

How would you use JavaScriptExecutor to get the current window height?

a) js.executeScript("return window.height;");

b) js.executeScript("return window.innerHeight;");

c) js.executeScript("return document.body.clientHeight;");

d) js.executeScript("return window.clientHeight;");

Answer: b) js.executeScript("return window.innerHeight;");

Which JavaScript command executed by JavaScriptExecutor disables a text field in a webpage?

a) js.executeScript("arguments[0].disable = true;", element);

b) js.executeScript("arguments[0].disabled = true;", element);

c) js.executeScript("arguments[0].setAttribute('disabled', 'true');", element);

d) Both b) and c)

Answer: d) Both b) and c)

What is a potential drawback of using JavaScriptExecutor in Selenium scripts?

a) It can only be used with Firefox

b) JavaScript execution can be slower than WebDriver methods

c) It can cause security issues if not used carefully

d) JavaScriptExecutor is not supported in Selenium

Answer: c) It can cause security issues if not used carefully

When would you prefer using JavaScriptExecutor over standard WebDriver methods?

a) When interacting with elements that are hidden or not visible

b) When you want to handle browser cookies

c) When executing JavaScript alerts

d) When managing multiple browser tabs

Answer: a) When interacting with elements that are hidden or not visible

Which JavaScriptExecutor method is best for checking the loading status of a webpage?

a) js.executeScript("return document.readyState;");

b) js.executeScript("document.loadComplete();");

c) js.executeScript("window.pageLoad();");

d) js.executeScript("document.pageLoaded;");

Answer: a) js.executeScript("return document.readyState;");

How can you use JavaScriptExecutor to dynamically change the style of an element in Selenium?

a) js.executeScript("arguments[0].style='color:red';", element);

b) js.executeScript("arguments[0].setStyle('color', 'red');", element);

c) js.executeScript("arguments[0].style.color='red';", element);

d) js.executeScript("setColor(arguments[0], 'red');", element);

Answer: c) js.executeScript("arguments[0].style.color='red';", element);

How can JavaScriptExecutor be used to handle the page scrolling functionality?

a) js.executeScript("window.scrollBy(0,500)");

b) js.executeScript("scrollPageBy(0,500);");

c) js.executeScript("pageScroll(0,500);");

d) js.executeScript("scrollWindow(0,500);");

Answer: a) js.executeScript("window.scrollBy(0,500)");