Practice String Example: Basic Operations (6.13) - Chapter 6: Arrays and Strings in Java

Practice: String Example: Basic Operations

Lesson 6.13Arrays and Strings in Java

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9 questions

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Exercise
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What method do you use to find the length of a string?
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Think of counting characters.
Question 2.
How can you remove spaces from the ends of a string?
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It helps clean up the string!
3Question 3.
What does the length() method return?
- Number of letters only
- Total number of characters
- Only space count
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It measures the whole string!
4Question 4.
True or False: The trim() method affects spaces inside the string.
- True
- False
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Focus on START and END spaces!
Question 5.
Write a program that takes text typed by a user and displays the trimmed and uppercased version of that string. The code editor sends no keyboard input, so store a sample of what a user might type, such as "hello java world" with a few extra spaces at both ends, in a String variable instead of reading it with a Scanner.
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Consider combining the methods in sequence.
Question 6.
Given a string sentence = "Learning Java is fun!", write a program that prints its length, its first and last characters, the word "Java" cut out with substring(), and the whole sentence in uppercase.
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Work out the index where "Java" starts before you call substring(), and remember that the last character is at length() - 1.

5 more questions in this section. Enroll free to practise them all.