Login / RegisterEmail Us

Assess Your Javascript Skills

Whether you're preparing for a technical interview or just curious about how good your Javascript skills are, this multiple-choice assessments will rank you as:
🥇 Javascript Superstar Top 3%🥇Javascript Superstar Top 3%
🥈 Javascript Expert Top 13%🥈Javascript Expert Top 13%
🥉 Javascript Intermediate Top 34%🥉Javascript Intermediate Top 34%
💩 Javascript Beginner Bottom 66%💩Javascript Beginner Bottom 66%
Ready to get started?
Next: [22]
Answer question #8147
Which of the following is true about variable naming conventions in JavaScript?
Answer question #8148
Which of the following is true about cookie handling in JavaScript?
Answer question #8149
Which built-in method calls a function for each element in the array?
Answer question #8150
Which built-in method returns the calling string value converted to upper case?
Answer question #8151
Which of the following function of Boolean object returns a string containing the source
Answer question #8152
Which of the following function of String object returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order?
Answer question #8153
Which of the following function of String object returns the calling string value converted to lower case?
Answer question #8154
Which of the following function of String object causes a string to be displayed as a superscript, as if it were in a <sup> tag?
Answer question #8155
Which of the following function of Array object creates a new array with all of the elements of this array for which the provided filtering function returns true?
Answer question #8156
Which function returns a string representing the array and its elements?
Answer question #8204
What's the output of:

var foo = function foo() {
console.log(foo === foo);
};

foo();
Random fact about Javascript 💡
💡FUN FACT 💡Although there are similarities between JavaScript and Java, including language name, syntax, and respective standard libraries, the two languages are distinct and differ greatly in design. JavaScript was influenced by programming languages such as Self and Scheme
Answer question #8205
What is alerted?
function bar() {
return foo;
foo = 10;
function foo() {}
var foo = '11';
}
alert(typeof bar());
Answer question #8206
What is the order of values alerted by the following code?
var x = 3;

var foo = {
x: 2,
baz: {
x: 1,
bar: function() {
return this.x;
}}}

var go = foo.baz.bar;

alert(go());
alert(foo.baz.bar());
Answer question #8207
What is the output of:

(true + false)>2 + true;
Answer question #8208
What is the result?

"1" - - "1";
Answer question #8209
What is the result?

Number("1") - 1 == 0;
Answer question #8210
What is the result?

new String("This is a string")
instanceof String;
Answer question #8211
What is printed in the console?

String('Hello') === 'Hello';
Answer question #8212
What does the code below alert?

function aaa() {
return
{
test: 1
};
}

alert(typeof aaa());
Answer question #8213
What's the result of the following code?

new Array(5).toString();
Answer more Javascript beginner/generic questions