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: Jun 15, 2026

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Question 1

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:

A : -1024

B : NaN

C : "-1024"

D : "1024"

Answer: A

Question 2

Analyze the code snippet:let n = 5 + 2 ** 2 * 3;The result stored in the variable n is:

A : 42

B : 117649

C : 84

D : 17

Answer: D

Question 3

We have initialized the name variable with the value "Alice"then we try to write the number 100 into it.let name = "Alice";name = 100;

A : the variable will retain the value "Alice"(we cannot modify the value that the variable has been initialized with).

B : the variable will contain the string "100"

C : the program will be aborted due to an error(we are trying to insert a value of a different type into the variablethan the value with which it was initialized).

D : the variable will contain the number 100

Answer: D

Question 4

The result of the operation false || "false" will be:

A : false

B : true

C : false

D : 0

Answer: A

Question 5

We want to declare a protocol constant and initialize it with the value "http"What should such a declaration look like?

A : let const protocol = "http";

B : let protocol; const protocol = "http";

C : const protocol; protocol = "http";

D : const protocol = "http";

Answer: D

Page: 1 / 53

Total 263 Questions | Updated On: Jun 15, 2026

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