Question

You can use a variable to store a set of characters enclosed within opening and closing double quotes. A set of characters can also be stored in an object using a specific keyword. Such data are manipulated using different functions. One of them is used to extract a set of characters from such data whereas, other to join multiple set of characters to form a single set.  

Based on the above discussion, answer the following questions:

1. Which of the following variables is used to store a set of characters?
   1. Character variable
   2. Alphanumeric variable
   3. String variable
   4. Local variable
2. Which of the following keywords is used to store a set of characters in an object?
   1. import
   2. oublic
   3. string
   4. new
3. Which of the following functions is used to extract a set of characters?
   1. substring() 
   2. charAt() 
   3. indexOf()
   4. subIndex()
4. Which of the following functions is used to join different set of characters into a single set?
   1. merge()
   2. concat()
   3. connect()
   4. join

Answer 1

1. iii. String variable
2. iv. new
3. i. substring()
4. iii. concat()