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 on November 19, 20230 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
