16 Questions
What does the length() method do when applied to a string?
Returns the number of characters in the string
Which method is used to obtain a character at a specific index from a string?
charAt(index)
What does the trim() method do when applied to a string?
Trims leading and trailing whitespaces from the string
How is concatenation achieved in Java with strings?
Using the concat(s1) method
What does the toUpperCase() method do when applied to a string?
Converts all characters in the string to uppercase
Which method returns a new string that concatenates the original string with another specified string?
concat(s1)
Which method can be used to concatenate two strings?
concat()
What does the trim() method do?
Removes all whitespace characters from the beginning and end of the string.
How can you get the length of a string?
Using the length() method.
What is the result of "Welcome".toUpperCase()?
WELCOME
How can you get the first character of a string?
Using the charAt(0) method.
What is the purpose of the indexOf() method in Java?
It returns the index of the first occurrence of the specified character or substring in the string.
How can you convert a string to an integer in Java?
Use the parseInt() method of the Integer class.
Which of the following is the correct way to concatenate a string with a numeric value in Java?
Append the numeric value to the string using the + operator.
What is the purpose of the substring() method in Java?
It extracts a substring from the original string based on the specified starting and ending indices.
What is the purpose of the printf() statement in Java?
It is used to format the output of a string by using format specifiers.
This quiz covers topics related to comparing strings, obtaining substrings, finding characters or substrings in a string, programming using characters and strings, converting hexadecimal characters to decimal values, and formatting output in Java. Topics include the equals method, compareTo method, indexOf method, and System.out.printf method.
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