Blockchain JavaScript Developer set 2

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Free Online Best Blockchain JavaScript Developer MCQ Questions for improve your basic knowledge of Blockchain JavaScript. This Blockchain JavaScript Developer set 2 test that contains 25 Multiple Choice Questions with 4 options. You have to select the right answer to a question.

Start

Congratulations - you have completed Blockchain JavaScript Developer set 2.

You scored %%SCORE%% out of %%TOTAL%%.

Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

In JavaScript the x===y statement implies that:

A	Both x and y are equal in value, type and reference address as well.
B	Both are x and y are equal in value only.
C	Both are equal in the value and data type.
D	Both are not same at all.

Question 2

The "new Point(3,2)", is a kind of _______ expression

A	Object Creation Expression
B	Primary Expression
C	Invocation Expression
D	Constructor Calling Expression

Question 3

Which of the following number object functions returns the value of the number?

A	toString()
B	valueOf()
C	toLocaleString()
D	toPrecision()

Question 4

When interpreter encounters an empty statements, what will it do?

A	Shows a warning
B	Prompts to complete the statement
C	Throws an error
D	Ignores the statements

Question 5

The type of a variable that is volatile is _______________

A	Volatile variable
B	Mutable variable
C	Immutable variable
D	Dynamic variable

Question 6

Which one of the following also known as Conditional Expression?

A	Alternative to if-else
B	Switch statement
C	If-then-else statement
D	immediate if

Question 7

Which of the following type of variable is visible everywhere in your JavaScript code?

A	global variable
B	local variable
C	Both of the above
D	None of the above

Question 8

The "function" and " var" are known as:

A	Keywords
B	Data types
C	Declaration statements
D	Prototypes

Question 9

Which of the following given functions of the Number Object formats a number with a different number of digits to the right of the decimal?

A	toExponential()
B	toFixed()
C	toPrecision()
D	toLocaleString()

Question 10

When there is an indefinite or an infinite value during an arithmetic computation in a program, then JavaScript prints______.

A	Prints an exception error
B	Prints an overflow error
C	Displays "Infinity"
D	Prints the value as such

Question 11

JavaScript Code can be called by using ___________

A	RMI
B	Triggering Event
C	Preprocessor
D	Function/Method

Question 12

In JavaScript, what will be used for calling the function definition expression:

A	Function prototype
B	Function literal
C	Function calling
D	Function declaration

Question 13

Which of the following functions of the String object returns the character in the string starting at the specified position via the specified number of characters?

A	slice()
B	split()
C	substr()
D	search()

Question 14

What kind of expression is “new Point(2,3)”?

A	Primary Expression
B	Object Creation Expression
C	Invocation Expression
D	Constructor Calling Expression

Question 15

In the JavaScript, which one of the following is not considered as an error?

A	Syntax error
B	Missing of semicolons
C	Division by zero
D	Missing of Bracket

Question 16

The web development environment (JavaScript) offers which standard construct for data validation of the input entered by the user?

A	Controlled loop constructs
B	Server page access
C	Client side Event
D	Permit server-side

Question 17

Which of the following is correct about features of JavaScript?

A	JavaScript is complementary to and integrated with HTML.
B	JavaScript is open and cross-platform.
C	Both of the above
D	All of the above

Question 18

What will be the output of the following JavaScript code? var string 1 = ”123”; var intvalue = 123; alert( string1 + intvalue );

A	123246
B	246
C	123123
D	Exception

Question 19

Choose the correct snippet from the following to check if the variable "a" is not equal the "NULL":

A	if(a!==null)
B	if (a!)
C	if(a!null)
D	if(a!=null)

Question 20

A function definition expression can be called as __________

A	Function prototype
B	Function literal
C	Function calling
D	Function declaration

Question 21

When interpreter encounters an empty statements, what will it do?

A	It will Shows a warning
B	It will Prompts to complete the statement
C	It will Throws an error
D	It will Ignores the statements

Question 22

A hexadecimal literal begins with __________

A	0
B	0x
C	0X
D	Both 0x and 0X

Question 23

Which of the following variables takes precedence over the others if the names are the same?

A	Global variable
B	The local element
C	The two of the above
D	None of the above

Question 24

In JavaScript, what is a block of statements?

A	is a Conditional block
B	is combines a number of statements into a single compound statement
C	is a conditional block and a single statement
D	is a block that contains a single statement

Question 25

Javascript is a ______________ type of language.

A	Object-Oriented
B	Object-Based
C	Assembly-language
D	High-level

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

There are 25 questions to complete.

←

List

→

Return

Shaded items are complete.

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
End

Return

BACK SET 1

NEXT SET 3

Study Zone

MCQ » Blockchain JavaScript Developer set 2

Blockchain JavaScript Developer set 2

Important Links