JavaScript
1. Mention some advantages and limitations of client side scripting.
2. Mention some common/widely used tasks performed by JavaScript.
3. Explain with examples the different ways to insert JavaScript in HTML code.
4. What are the primitive datatypes of JavaScript?
5. Explain with an example the difference between the operators == and ===.
6. What is the difference between undefined and null?
7. Explain with example the difference among prompt, alert and confirm.
8. Compare and contrast among var, let, and const.
9. Explain with examples:
i) indexOf(), pop(), push(), shift(), unshift(), slice(), splice() methods of Array.
ii) concat(), replace(), search(), split(), slice(), substring(), substr() methods of String.
iii) getFullYear(), getMonth(), getDate(), getHours() methods of Date.
10. Explain with example(s) how an HTML element can be added and removed from an HTML page
with JavaScript.
11. Describe the functionality of the following HTML DOM events: change, mousedown, mouseup,
click, submit, reset, load, unload.
12. Why addEventListener() is used? What is the difference between event bubbling and event
capturing?
13. State some properties and their usages of i) window.screen object and ii) window.navigator object.
14. What functionality is provided by a web Worker?
15. Write JavaScript function(s)/program:
i) To determine whether a given year is a leap year.
ii) To format a number up to specified decimal places.
iii) To check whether a string is palindrome or not.
iv) That accepts a string as a parameter and converts the first letter of each word of
the string in upper case.
Example string: The students of MCA second year
Expected Output: The Students Of MCA Second Year
v) That accepts a string as a parameter and finds the longest word within the string.
Example string: JavaScript Lab Assignments
Expected Output: Assignments
vi) Which accepts an argument and returns the type. Note: There are six possible
values that typeof returns: object, boolean, function, number, string, and
undefined.
vii) To get the number of occurrences of each letter in specified string.
viii) That accepts two arguments, a string and a letter and the function will count the
number of occurrences of the specified letter within the string in a case-insensitive
way.
Sample arguments: MCA students of Second year, s
Expected output: 3
