JavaScript DOM Sec A

What does DOM stand for?

• Data Object Model
• Dynamic Object Manipulation
• Document Object Model
• Document Order Manipulation

Which method is used to access an HTML element by its ID?

• getElementById()
• selectElement()
• findElement()
• querySelector()

How do you change the content of an HTML element using JavaScript?

• textContent
• innerHTML
• innerText
• contentText

What does the document.write() method do in JavaScript?

• Writes HTML expressions or JavaScript code to a document
• Opens a new document
• Deletes the current document
• Appends text to an existing document

What will the following code output? console.log(5 + '5');

• 10
• '55'
• 55
• Error

What is the result of the following expression? typeof(undefined);

• 'string'
• 'null'
• 'object'
• 'undefined'

What will the following code output? console.log(typeof NaN);

• 'NaN'
• 'null'
• 'undefined'
• 'number'

What will be the output of the following code? console.log(3 < 2 < 1);

• True
• False
• null
• Error

What will be the output of the following code? console.log([] == ![]);

• Error
• null
• True

Which of the following JavaScript conditions can be used to remove the vowel 'a' from a string?

• a !== 'a'
• a !== 'e'
• a !== 'i'
• a !== 'o'