JavaScript Test | JavaScript Quiz with MCQ

Which of the following represents when a String object splits a String object into an array of strings by separating the string into substrings?

SLICE()

SPLIT()

REPLACE()

SEARCH()

do while (a < b) runs

UNTIL A >= B

UNTIL A < B

UNTIL A > B

UNTIL A <= B

How can you get the type of the variable?

USING TYPEOF OPERATOR

USING GETTYPE FUNCTION

BOTH OF THE ABOVE.

NONE OF THE ABOVE.

Which of the following are the valid JavaScript codes to obtain the number of milliseconds since the epoch?

Note: Select more than 1 option as correct answer

VAR TIMESTAMP = NEW DATE() .GETTIME();

VAR TIMESTAMP = NUMBER(NEW DATE());

VAR TIMESTAMP = DATE.NOW;

VAR TIMESTAMP = NEW DATE().VALUEOF();

When toggling a variable, its cycle must be 0 and 1. When the variable's active value is 0, the next value should be 1, and when the variable's active value is 1, the next value should be 0. Considering the scenario above, which of the following is correct?

Q = (Q == 1 ? 1 : 0);

Q = 1 - Q;

Q 0;

Q = INV(0);

Which of the following is the correct way to stop setInterval() from calling a function in JavaScript?

SETLNTERVAL() RETURNS AN INTERVAL ID, WHICH CAN PASS TO CLEARLNTERVAL() TO STOP IT FROM CALLING ITS DESIGNATED FUNCTION.

CANNOT STOP THE SETLNTERVAL() FROM CALLING ITS DESIGNATED FUNCTION.

STOPPING SETLNTERVAL() IS BROWSER-DEPENDENT; SOME BROWSERS SUPPORT STOPPING SETLNTERVAL(), OTHERS DON'T.

NONE OF THESE.

What kind of Typed Arrays representation of the pixels does Canvas ImageData return when you call ImageData.data?

UINT8CLAMPEDARRAY

UINT8ARRAY

INT8ARRAY

UINT32ARRAY

What does a "for...in" loop do?

IT ITERATES OVER THE ENUMERABLE PROPERTIES AN OBJECT, IN ARBITRARY ORDER

IT ITERATES OVER THE ENUMERABLE PROPERTIES AN STRING, IN ARBITRARY ORDER

IT ITERATES OVER THE ENUMERABLE PROPERTIES AN INTEGER, IN ARBITRARY ORDER

IT ITERATES OVER THE ENUMERABLE PROPERTIES AN FUNCTION, IN ARBITRARY ORDER

Which method is used to evaluate a string of Java Script code in the context of the specified object?

PARSELNT

EVAL

PARSEFLOAT

EFLOAT

What are the Behavioral patterns as follows?

Note: Select more than 1 option as correct answer

TEMPLATE METHOD

CHAIN OF RESPONSIBILITY

MEDIATOR

PROXY

Which of the following determines whether cookies are enabled in a browser or not?

(NAVIGATOR.COOKIE)? TRUE : FALSE

(APPLICATION.COOKIEENABLED)? TRUE : FALSE

(NAVIGATOR.COOKIEENABLED)? TRUE : FALSE

(APPLICATION.COOKIE)? TRUE : FALSE

What does ~ mean in bitwise operation?

SPREAD

XOR

ZERO-FILL

NOT

What are valid states of the created Promise?

Note: Select more than 1 option as correct answer

PENDING

FULFILLED

INITIALIZING

REJECTED

What is true about strict mode?

Note: Select more than 1 option as correct answer

IT APPLIES TO BLOCK STATEMENTS

IT APPLIES TO INDIVIDUAL FUNCTIONS

IT APPLIES TO ENTIRE SCRIPT

IT APPLIES TO HTML PAGE

What is the super function in the class context?

IT'S USED TO MAKE SUPER VARIABLE, WHICH IS AVAILABLE IN ALL CLASS SCOPE

IT'S USED TO CALL PARENT CLASS' CONSTRUCTOR

IT'S CALLED BEFORE CLASS' CONSTRUCTOR TO INITIATE STARTING PROPERTIES AND VALUES

IT'S USED IN CLASSES TO ENABLE 'THIS.' USAGE

How many yield keywords can be used in function* functions?

AS MANY AS NEEDED

1

SAME AMOUNT AS 'RETURN' KEYWORD

AS MANY AS NEEDED IF FOLLOWED BY 'RETURN' KEYWORD

What is JavaScript?

IT'S THE PROGRAMMING LANGUAGE USED BY ONLY WEB DEVELOPERS

IT'S THE PROGRAMMING LANGUAGE USED BY ONLY SERVER DEVELOPERS

IT'S THE PROGRAMMING LANGUAGE USED BY WEB AND SERVER DEVELOPERS

IT'S ONE OF THE PROGRAMMING LANGUAGES BASED ON ECMASCRIPT STANDARD

What is the Promise?

ASYNC CALL

AJAX CALL

OBJECT

SYNC CALL

The Promise is created. When will it resolve?

IMMEDIATELY

IN THE FEATURE

NEVER

UNKNOWN

Select the existing event handler for DOM elements.

ONDRAG

ONCLICK

CLOSE

ONLOAD

Which of the following is not a mouse event?

ONMOUSESCROLLER

ONCLICK

ONMOUSEOVER

ONMOUSEMOVE

What is the event that fires when the form element textarea loses the focus?

ONCLICK

ONDBLCLICK

ONFOCUS

ONBLUR

What is the correct regular expression to replace Mango with Apple in a string: var str = "Eat Mango!";

VAR RES = STR.REPLACE(/MANGO/I, "APPLE");

VAR RES = STR.REPLACE(%MANGO%,"APPLE");

VAR RES = STR.REPLACE(*MANGO*,"APPLE");

VAR RES = STR.REPLACE(/MANGO/, "APPLE");

Which JavaScript class represents regular expressions?

REGEXPOBJ

REGEXP

REGEXPCLASS

STRINGEXP

Arrow function expression has a shorter syntax than a function expression and does not bind its own as follow?

ARGUMENTS, PROPTYPE

ARGUMENTS, CLASS

ARGUMENTS, SUPER

PROPTYPE, OBJECT

What command skips the rest of a case statement?

RETURN

EXIT

CONTINUE

BREAK

What will be the value of a? let a = -1 ? 'foo' ? null : -1 : 1;

FOO

NULL

-1

1

How do you remove property a from this object? let a = {a:1, b:2};

A.A = NULL;

A.A = FALSE;B

A.A = 'UNDEFINED';

DELETE A.A;

Which of the following popup boxes have support in JavaScript? (Choose all that apply.)

ALERT BOX

CONFIRM BOX

PROMPT BOX

ALL OF THE ABOVE

Which of the following determines the type of a given object?

VARIABLE

TYPEOF

STRING

OBJECT

Which types of image maps can be used with JavaScript?

SERVER-SIDE IMAGE MAPS

CLIENT-SIDE IMAGE MAPS

SERVER-SIDE IMAGE MAPS AND CLIENT-SIDE IMAGE MAPS

NONE OF THE ABOVE

Which of the following is used in JavaScript to insert special characters?

&

+

%

NONE OF THE ABOVE

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Exam Type:	JavaScript Programming MCQ Skill Test
Questions Type:	Multiple Choice Questions
Total Questions:	32
Time Limit:	30 Minutes
Last Update	June, 2025

JavaScript Programming Test

Pass JavaScript Programming Exam

JavaScript Programming Quiz

Which of the following represents when a String object splits a String object into an array of strings by separating the string into substrings?

do while (a < b) runs

How can you get the type of the variable?

Which of the following are the valid JavaScript codes to obtain the number of milliseconds since the epoch?

When toggling a variable, its cycle must be 0 and 1. When the variable's active value is 0, the next value should be 1, and when the variable's active value is 1, the next value should be 0. Considering the scenario above, which of the following is correct?

Which of the following is the correct way to stop setInterval() from calling a function in JavaScript?

What kind of Typed Arrays representation of the pixels does Canvas ImageData return when you call ImageData.data?

What does a "for...in" loop do?

Which method is used to evaluate a string of Java Script code in the context of the specified object?

What are the Behavioral patterns as follows?

Which of the following determines whether cookies are enabled in a browser or not?

What does ~ mean in bitwise operation?

What are valid states of the created Promise?

What is true about strict mode?

What is the super function in the class context?

How many yield keywords can be used in function* functions?

What is JavaScript?

What is the Promise?

The Promise is created. When will it resolve?

Select the existing event handler for DOM elements.

Which of the following is not a mouse event?

What is the event that fires when the form element textarea loses the focus?

What is the correct regular expression to replace Mango with Apple in a string: var str = "Eat Mango!";

Which JavaScript class represents regular expressions?

Arrow function expression has a shorter syntax than a function expression and does not bind its own as follow?

What command skips the rest of a case statement?

What will be the value of a? let a = -1 ? 'foo' ? null : -1 : 1;

How do you remove property a from this object? let a = {a:1, b:2};

Which of the following popup boxes have support in JavaScript? (Choose all that apply.)

Which of the following determines the type of a given object?

Which types of image maps can be used with JavaScript?

Which of the following is used in JavaScript to insert special characters?

JavaScript Programming Test Explained