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Java React Node Diagnostic Assessment

Authored by David Mendez

Professional Development

Professional Development

Used 1+ times

Java React Node Diagnostic Assessment
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60 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the result of console.log(5 + '5')?

10

"55"

55

Error

"10"

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following statements has block scope?

var

global

let

none

static

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What does the setTimeout function do?

Executes a function immediately

Stops the program for a while

Executes a function after a certain time

Declares a non-blocking wait

Throws an exception

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the result of this code?

"Hello" then "World"

"Hello World"

"World" then "Hello"

"World Hello"

Error

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What method converts an object to a JSON string?

JSON.convert()

stringifyJSON()

JSON.stringify()

JSON.encode()

objectToJSON()

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is the result of typeof null?

null

undefined

"object"

"null"

"undefined"

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What operator is used to prevent reassignment of value?

const

let

var

define

Object.freeze()

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