100% Free JS Institute JSE-40-01 Practice Test Questions and Answers 2026

Start Learning with the Latest and Real 100% Free JS Institute JSE-40-01 Exam Questions

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Total 263 Questions | Updated On: May 22, 2026

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Question 1

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

A : TypeError

B : SyntaxError

C : TypeError and ReferenceError

D : ReferenceError

Answer: A

Question 2

Handling an exception thrown by the interpreter with catch causes:

A : the execution of the program to be automatically aborted,but we can generate our own error message(not necessarily in the console)

B : further executing of the program to depend on the codewe place in the execution handler.

C : the program to continue executing until the last instruction,but we can generate our own error message(not necessarily in the console).

D : nothing to happen, because catch is not used for exception handling.

Answer: B

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

What does shadowing mean?

A : Declaring a local variable with the same nameas the previously declared global variable.

B : Declaring a global variable with the same nameas a previously declared global variable.

C : Deleting and rewriting a selected piece of program code.

D : Changing the value of a variable.

Answer: A

Question 5

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

Page: 1 / 53

Total 263 Questions | Updated On: May 22, 2026

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