Test Your Knowledge: MCQs on String Concepts in Java

Multiple Choice Quiz

1: What is a string in Java?

a) A data type used to store numerical values.
b) A data structure used to store multiple values
c) A sequence of characters.

2: Which class is used to create and manipulate strings in Java?

a) StringManipulator
b) StringBuilder
c) String

3: Which of the following is true about strings in Java?

a) Strings are mutable.
b) Strings are instances of the String class.
c) Strings can only contain alphabetic characters.

4: Which operator is used to concatenate strings in Java?

a) +
b) *
c) &

5: Which method is used to find the length of a string in Java?

a) length()
b) size()
c) count()

6: What does the charAt(index) method do in Java?

a) Converts a string to uppercase.
b) Returns the character at the specified index in a string
c) Removes all whitespace from a string.

7: Which method is used to compare two strings lexicographically?

a) equals()
b) compare()
c) compareTo()

8: Which of the following methods is used to convert a string to lowercase in Java ?

a) toLower()
b) lowercase()
c) toLowerCase()

9: What is the result of the expression "hello".substring(1, 4)?

a) "ell"
b) "hello"
c) "ello"

10: Which of the following methods is used to check if a string starts with a specific prefix?

a) startsWith()
b) beginsWith()
c) startsWithPrefix()

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