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Questions and Answers
What is the index of the character 'o' in the string "Hello World"?
What is the index of the character 'o' in the string "Hello World"?
- 6
- 7 (correct)
- 3
- 4
Which method is used to find the length of a string in Java?
Which method is used to find the length of a string in Java?
- count()
- getLength()
- length() (correct)
- size()
How can a String object be created using a string literal in Java?
How can a String object be created using a string literal in Java?
- `String str = "Hello"` (correct)
- `String str = new String("Hello")`
- `String str = new String(Hello)`
- `String str = Hello`
Which package provides the String class in Java?
Which package provides the String class in Java?
What is the difference between comparing strings using '==' and the equals() method?
What is the difference between comparing strings using '==' and the equals() method?
What happens when two string literals with the same content are compared using '=='?
What happens when two string literals with the same content are compared using '=='?
Why is the String class considered immutable?
Why is the String class considered immutable?
What does the statement 'new String("Computer")' do in Java?
What does the statement 'new String("Computer")' do in Java?
What does the method 'trim()' do when used on a string?
What does the method 'trim()' do when used on a string?
What does the method 'substring(1, 3)' return when used on the string 'Java'?
What does the method 'substring(1, 3)' return when used on the string 'Java'?
What is the result of the method 'toUpperCase()' when used on the string 'Java'?
What is the result of the method 'toUpperCase()' when used on the string 'Java'?
What does the method 'replace('a', 'o')' do when used on the string 'Java'?
What does the method 'replace('a', 'o')' do when used on the string 'Java'?
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