Course snippets 2 Quiz

Test your understanding of course snippets with this quiz. Answer questions related to code snippets for problem-solving.

Question 1

Which of the following is a JavaScript data type?

String Integer Boolean Function

Question 2

Which of these is a valid jQuery selector?

#myElement .className document.getElementById('myElement') $('#myElement')

Question 3

Which of these Node.js modules is used to create a web server?

http fs express os

Question 4

In PHP, which function is used to output text to the browser?

print echo console.log output

Question 5

In Python, which keyword is used to define a function?

def function declare method

Question 6

Which SQL query is used to retrieve data from a table?

SELECT INSERT UPDATE DELETE

Question 7

Which of the following is used to set a JavaScript variable?

let var const All of the above

Question 8

What is the correct way to include an external JavaScript file in an HTML document?

Question 9

Which of the following is not a valid jQuery method?

$.ajax $.fade $.slide $.hide

Question 10

What command is used to install packages in Node.js?

install npm install node install npm add

Question 11

In PHP, which function is used to include external PHP files?

require include include_once All of the above

Question 12

In Python, how do you define a list?

[item1, item2, item3] {item1, item2, item3} (item1, item2, item3) [item1; item2; item3]

Question 13

What is the purpose of a primary key in MySQL?

To identify records uniquely To store data types To connect tables To perform queries

Question 14

Which of these is used to loop over an array in JavaScript?

forEach() for(){} map() reduce()

Question 15

Which statement is used to stop a loop in JavaScript?

break continue return exit

Question 16

What method is used to add an item to the end of an array in JavaScript?

push() pop() shift() unshift()

Question 17

Which keyword is used in PHP to define a constant?

const var let define

Question 18

In Python, how do you convert a string to an integer?

int(string) str(int) float(string) int.convert(string)

Question 19

Which of these is the correct syntax for a function declaration in JavaScript?

function myFunction() {} function myFunction[] {} function myFunction() []{} func myFunction() {}

Question 20

In Node.js, which of the following is used to handle HTTP requests?

http module express router fs module

Question 21

Which of these is the correct way to connect to a MySQL database in PHP?

$connection = mysqli_connect('localhost', 'user', 'password', 'database'); $connection = mysql_connect('localhost', 'user', 'password'); $connection = db_connect('localhost', 'user', 'password', 'database'); $connection = mysqli('localhost', 'user', 'password', 'database');

Question 22

Which JavaScript function is used to prompt the user for input?

prompt() alert() confirm() input()

Question 23

Which SQL keyword is used to sort the result of a query?

ORDER BY SORT BY GROUP BY FILTER BY

Question 24

Which of the following is used to escape characters in a string in JavaScript?

escape() encode() charAt() String.fromCharCode()

Question 25

Which of these is the correct way to declare an array in JavaScript?

var arr = []; arr = [1, 2, 3]; var arr = new Array(); All of the above

Question 26

In Python, which function is used to get the length of a list?

size() length() len() count()

Question 27

Which function is used to get the current date and time in PHP?

date() get_date() current_time() now()

Question 28

Which of the following is a valid MySQL data type?

INT STRING NUMERIC FLOATS

Question 29

In jQuery, which function is used to hide elements?

$().hide() $().display() $().remove() $().invisible()

Question 30

What does the 'break' statement do in JavaScript?

Terminates the loop Skips the current iteration Ends the program Continues to the next iteration