Free JS Institute JSE-40-01 Exam Questions

Become JS Institute Certified with updated JSE-40-01 exam questions and correct answers

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Total 263 Questions | Updated On: Aug 18, 2026

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Question 1

Most errors in JavaScript code that the interpreter encounterswhile the program is running cause exceptions to be thrown.What do unhandled exception do?

A : The interpreter ignores unhandled exceptions,the program continues to execute,and no information is received.

B : An error message appears in the consoleand the execution of the program is aborted.

C : An error message appears in the consoleand program execution continues.

D : The interpreter removes the erroneous piece of code,replaces it with corrected one,and continues the program execution.

Answer: B

Question 2

Analyze the following code:let x = 10;function test() { let x = 20;} test();console.log(x);What will be displayed in the console as a result of its execution?

A : 10

B : undefined

C : Nothing will show up.

D : "x"

Answer: A

Question 3

Which of the following loop instructions is intended only to loopthrough all elements of the indicated array?

A : do ... while

B : for ... in

C : for ... of

D : for

Answer: C

Question 4

Analyze the code below:let a = 10;do { console.log(--a);} while (a > 3);Which statement can replace the do ... while from the example above?

A : while (a >= 3) console.log(a--);

B : while (a > 2) console.log(--a);

C : while (a > 3) console.log(--a);

D : while (a > 3) console.log(a--);

Answer: C

Question 5

Analyze the following code:let x 10;console.log(x);What exception will be thrown as a result of its execution attempt?

A : ReferenceError

B : RangeError

C : TypeError

D : SyntaxError

Answer: D

Page: 1 / 53

Total 263 Questions | Updated On: Aug 18, 2026

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