Array u0026 String Manipulation Mastery Quiz Quiz

1. Reverse Array Elements

   Given an array [3, 1, 4, 2], what is the result of reversing it?

   1. [2, 4, 1, 3]
   2. [2, 1, 4, 3]
   3. [4, 3, 1, 2]
   4. [3, 4, 1, 2]
   5. [2, 4, 3, 1]

2. String Split

   What is the result of splitting the string 'hello world' by a space character?

   1. ['hello', 'world']
   2. ['h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd']
   3. ['helloworld']
   4. ['hello world']
   5. ['hello', '', 'world']

3. Array Length

   If arr = [7, 'a', 9, 2], what does arr.length return?

   1. 4
   2. 5
   3. 3
   4. 2
   5. arr.lenght

4. String Concatenation

   Which of the following correctly concatenates 'Java' and 'Script' in most programming languages?

   1. 'Java' + 'Script'
   2. 'Java' u0026 'Script'
   3. 'Java'.join('Script')
   4. 'Java'.concatinate('Script')
   5. 'Java'.add('Script')

5. Finding Index

   Given fruits = ['apple', 'banana', 'cherry'], what is the index of 'cherry'?

   1. 2
   2. 1
   3. 3
   4. 0
   5. -1

6. Array Push

   If nums = [1, 2, 3] and we perform nums.push(4), what is the new array?

   1. [1, 2, 3, 4]
   2. [4, 1, 2, 3]
   3. [1, 2, 3]
   4. [1, 2, 3];4
   5. [1, 2, 3, 4, 5]

7. Substring Extraction

   What does 'computer'.substring(3, 6) return?

   1. 'put'
   2. 'com'
   3. 'comp'
   4. 'puter'
   5. 'pute'

8. Removing Last Array Element

   What is left in arr = ['red', 'green', 'blue'] after calling arr.pop()?

   1. ['red', 'green']
   2. ['red', 'blue']
   3. ['green', 'blue']
   4. ['red']
   5. ['green']

9. Case Conversion

   If you apply the toUpperCase() method to the string 'array', what do you get?

   1. 'ARRAY'
   2. 'Array'
   3. 'array'
   4. 'Arrray'
   5. 'aRRAY'

10. Accessing Characters

    How do you access the third character of the string 'Python'?

    1. 'Python'[2]
    2. 'Python'[1]
    3. 'Python'.charAt(3)
    4. 'Python'.at(2)
    5. 'Python'.get(3)