Free JSE-40-01 Mock Exam – Practice Online Confidently

Increase your chances of passing the JS Institute JSE-40-01 exam questions on your first try. Practice with our free online JSE-40-01 exam mock test designed to help you prepare effectively and confidently.

Exam Code: JSE-40-01
Exam Questions: 263
JSE Certified Entry-Level JavaScript Programmer
Updated: 14 Apr, 2026
Question 1

Analyze the following code:let msg "Hello World";console.log(msg);What exception will be thrown as a result of its execution attempt?

Options :
Answer: B

Question 2

The string "1024" has been written into the str variable (let str = "1024";)Then the operation str = -str is performed.As a result, the variable str will contain:

Options :
Answer: A

Question 3

Which of the following is not a loop instruction in JavaScript?

Options :
Answer: D

Question 4

Analyze the following code:const msg = "Hello";msg += " world";onsole.log(x);What exception will be thrown as a result of its execution attempt?

Options :
Answer: A

Question 5

Analyze the following code:function fn(a) {    console.log('test');    a--;    if(a>2) fn(a);}fn(6);How many times will test appear on the screen?

Options :
Answer: D

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