Java Strings Quiz

Which method is used to return the length of a string in Java?

• lengthOf()

• count()

• length()

• size()

Which method is used to convert a string to uppercase?

• toUpper()

• uppercase()

• convertUpper()

• toUpperCase()

Which class provides mutable strings in Java?

• String

• StringBuffer

• StringBuilder

• StringTokenizer

What is the default value of a string variable in Java?

• Empty String

• null

• Whitespace

• Undefined

Which method is used to compare two strings lexicographically?

• equals()

• compare()

• compareTo()

• equalsIgnoreCase()

Which of the following is immutable in Java?

• String

• StringBuffer

• StringBuilder

• StringTokenizer

Which method is used to concatenate two strings in Java?

• concat()

• append()

• merge()

• combine()

What will the result of "Hello".substring(0, 2) be?

• el

• He

• Hel

• lo

Which method in Java checks if two strings are equal, considering case sensitivity?

• equalsIgnoreCase()

• equals()

• isEqual()

• compareTo()

Which method is used to split a string into an array of substrings?

• partition()

• divide()

• split()

• slice()