CSE326 Unit-5 MCQ Test

Question 1

What is a function in JavaScript?

A A block of code that runs automatically B A reusable block of code that performs a specific task C A variable that stores multiple values D An object property

Question 2

Which keyword is used to define a function in JavaScript?

A func B function C def D method

Question 3

How do you pass parameters to a JavaScript function?

A Using return keyword B Inside square brackets C Inside parentheses D Using var keyword

Question 4

Which statement is used to return a value from a function?

A break B continue C return D yield

Question 5

Which type of function does not have a name?

A Normal function B Named function C Anonymous function D Recursive function

Question 6

Which JavaScript event is triggered when a user submits a form?

A onclick B onfocus C onsubmit D onload

Question 7

Which event occurs when a key is pressed on the keyboard?

A onmouse B onkeydown C onclick D onsubmit

Question 8

Which event is triggered when the mouse pointer moves over an element?

A onmouseover B onmouseout C onclick D onload

Question 9

Which JavaScript event occurs when an input field loses focus?

A onfocus B onblur C onchange D oninput

Question 10

What is form validation?

A Styling the form B Checking form data before submission C Submitting form automatically D Resetting the form

Question 11

Which attribute is used to make a form field mandatory in HTML5?

A validate B required C mustfill D compulsory

Question 12

Which JavaScript method is used to prevent form submission?

A stop() B preventDefault() C cancel() D break()

Question 13

Which JavaScript event is used for mouse click?

A onmouse B onpress C onclick D onhover

Question 14

Which function is used to display a message box?

A prompt() B confirm() C alert() D message()

Question 15

Which function displays a dialog box with OK and Cancel buttons?

A alert() B prompt() C confirm() D input()

Question 16

Which function accepts user input as text?

A alert() B confirm() C prompt() D input()

Question 17

Which event is triggered when a user changes the value of an input field?

A onfocus B onclick C onchange D onsubmit

Question 18

Which JavaScript keyword is used to declare a block-scoped variable?

A var B let C const D static

Question 19

What will be the output of isNaN("10")?

A true B false C NaN D error

Question 20

Which JavaScript method converts a string into an integer?

A parseFloat() B Number() C parseInt() D String()

Question 21

Which keyword is used to stop the execution of a function and return control to the caller?

A break B continue C return D exit

Question 22

What is the purpose of function arguments in JavaScript?

A To store function output B To pass values to a function C To declare variables D To stop function execution

Question 23

Which event is triggered when a key is released on the keyboard?

A onkeypress B onkeydown C onkeyup D onkeyrelease

Question 24

Which event occurs when the mouse button is pressed over an element?

A onmouseover B onmousedown C onmouseup D onclick

Question 25

Which HTML attribute specifies a regular expression that an input field's value must match?

A validate B pattern C regex D format

Question 26

Which JavaScript method is used to access form elements?

A document.forms B document.getForm() C document.form D document.selectForm()

Question 27

Which JavaScript event is triggered when the mouse pointer leaves an element?

A onmouseover B onmouseenter C onmouseout D onmouseleave

Question 28

What does the arguments object contain in a JavaScript function?

A Return value of function B List of parameters passed to the function C Global variables D Local variables only

Question 29

Which JavaScript function checks whether a value is a number?

A isNaN() B Number() C parseInt() D checkNumber()

Question 30

Which JavaScript event is triggered when the user types in an input field?

A onchange B onfocus C oninput D onsubmit

📝 CSE326 Unit-5 MCQ Test

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