OOP String Class Quiz Online Practice Test

1. Which of the following is true about objects of the String class?

Objects are immutable

Objects are mutable

Objects are created only once

Objects cannot be created

2. How do you declare an object of the String class?

`String object_Name = value;`

`String object_name = new;`

`String object_name = new value;`

`String object_name = value new;`

3. What does the `length` function do in the String class?

Returns the length of the string, including the null character

Returns the length of the string, excluding the null character

Returns the length of a substring

Returns the size of the string in bytes

4. Which function retrieves the character at a specific index in a string?

`char charAt(index);`

`char charIn(StringName);`

`char charAt(StringName);`

`char charIn(index);`

5. If only one parameter is passed to the `substring` function, then __________.

It returns the character at the specified position

It returns a substring of length 1 starting from the specified index

It returns the substring from the specified index to the end of the string

It returns the substring from the start of the string up to the specified index

6. If two indices are provided as arguments to the `substring` function, then ____________.

A string of length equal to the sum of the two arguments is returned

A string starting from the first index and of length equal to the second argument is returned

A string starting from the first index and of length equal to the sum of the two arguments is returned

A string starting from the first index and ending at the second index position is returned

7. The `concat()` function in the String class is used to ___________.

Replace an old string with a new string

Add two strings together

Append one string to the end of another string

Remove a string from the end of another string

8. The `lastIndexOf()` function is used to ___________.

Get the index of the last occurrence of the specified character in the string

Get the index of the first occurrence of the specified character in the string

Get the index of the last occurrence of the first character in the string

Get the index of the last occurrence of the last character in the string

9. The `equals()` function is ____________ and the `equalsIgnoreCase()` function is ___________

Case insensitive, case insensitive

Case sensitive, case insensitive

Case sensitive, case sensitive

Case insensitive, case sensitive

10. What is the purpose of the `compareTo()` function?

To compare a string value to a string object

To compare a string value to another string value

To compare one string object to another string object

To compare a string object to a string value

11. The String class provides the `toUpperCase()` function to ___________.

Convert the first character to uppercase

Convert the last character to uppercase

Convert all characters in the string to uppercase

Convert uppercase characters to lowercase and lowercase characters to uppercase

12. What does the `trim()` function do in the String class?

Eliminates all whitespace from the string

Removes whitespace from the beginning of the string

Removes whitespace from the end of the string

Removes whitespace from both the start and end of the string

13. How many arguments does the `replace()` function take?

14. When two arguments are provided to the `indexOf()` function, ___________.

The second argument denotes the occurrence count of the specified character from the start

The second argument denotes the occurrence count of the specified character from the end

The second argument denotes the index position of the character in relation to the first argument

The second argument denotes the index position of the character counting from the end of the string

Test Name:	OOP String Class Quiz
Subject Category:	Computer Science
Test Type:	Multiple Choice Questions
Total Score / Questions:	14 / 14
Time Allowed:	10 Min
Who Should Practice this Test:	Students, job seekers, or professionals preparing for competitive exams and interviews.

OOP String Class MCQ Quiz Online Practice Test