How Well Do You Know JavaScript? Test your knowledge of JavaScript with these 10 questions! See if you can answer all 10 questions correctly remus2009 published 9 days ago0 responses 0 « Previous Next » Questions in vertical order 1/10 What is JavaScript primarily used for? Styling web pages Creating interactive web elements Building databases Running server-side scripts 2/10 Which of the following is NOT a JavaScript data type? String Boolean Array Float 3/10 What is the correct way to declare a variable in JavaScript? var myVar; myVar = 10; variable myVar; let myVar = 10; 4/10 Which keyword is used to define a function in JavaScript? func def function fn 5/10 What does the '=== operator do in JavaScript? Compares values for equality without type conversion Assigns a value to a variable Checks if a variable is null Concatenates two strings 6/10 Which function is used to add an element to the end of an array in JavaScript? push() add() append() insert() 7/10 What is the result of 10 + '20' in JavaScript? 1020 30 102 Error 8/10 Which method is used to remove the last element from an array in JavaScript? remove() pop() delete() splice() 9/10 What does the 'typeof' operator return in JavaScript? Type of a variable Value of a variable Index of a variable Length of a variable 10/10 What is the correct syntax to comment a single line in JavaScript? // This is a comment /* This is a comment */ <!-- This is a comment --> # This is a comment
