Javascript Test - UIT Summer 2022

test.md

1. Write a JavaScript function that reverse a number.

     Example x = 32243;
     Expected Output : 34223
   

2. Write a JavaScript function that checks whether a passed string is palindrome or not?

     A palindrome is word, phrase, or sequence that reads the same backward as forward, e.g., madam or nurses run.
   

3. Write a JavaScript function that generates all combinations of a string.

     Example string : 'dog'
     Expected Output : d,do,dog,o,og,g
   

4. Write a JavaScript function that returns a passed string with letters in alphabetical order.

     Example string : 'webmaster'
     Expected Output : 'abeemrstw'
     Assume punctuation and numbers symbols are not included in the passed string.
   

5. Write a JavaScript function that accepts a string as a parameter and converts the first letter of each word of the string in upper case.

     Example string : 'the quick brown fox'
     Expected Output : 'The Quick Brown Fox '
   

6. Write a JavaScript function that accepts a string as a parameter and find the longest word within the string.

     Example string : 'Web Development Tutorial'
     Expected Output : 'Development'
   

7. Write a JavaScript function that accepts a string as a parameter and counts the number of vowels within the string.

     Note : As the letter 'y' can be regarded as both a vowel and a consonant, we do not count 'y' as vowel here.
     Example string : 'The quick brown fox'
     Expected Output : 5
   

8. Write a JavaScript function that accepts a number as a parameter and check the number is prime or not.

     Note : A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself.
   

9. Write a JavaScript function which accepts an argument and returns the type.

     Note : There are six possible values that typeof returns: object, boolean, function, number, string, and undefined.
   

10. Write a JavaScript function which returns the n rows by n columns identity matrix.

11. Write a JavaScript function which will take an array of numbers stored and find the second lowest and second greatest numbers, respectively.

     Sample array : [1,2,3,4,5]
     Expected Output : 2,4