Java String (Hard)

Play an AI-generated podcast conversation about this lesson

Which method is used to find the length of a string?

length() (correct)
charAt()
concat()
compareTo()

Which method is used to compare two strings and returns a positive value if the first string is alphabetically greater than the second string?

compareTo() (correct)
concat()
length()
charAt()

Which method is used to concatenate two strings?

charAt()
compareTo()
concat() (correct)
length()

Which method is used to find the character present at a particular index in a string?

charAt() (C) Signup and view all the answers

Which method is used to convert a string to upper case?

toUpperCase() (A) Signup and view all the answers

Which method is used to get a substring of a string?

substring() (B) Signup and view all the answers

Which method is used to create a formatted string in Java?

format() (B) Signup and view all the answers

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

String (B) Signup and view all the answers

Which of the following is true about strings in Java?

Strings are mutable (D) Signup and view all the answers

What is the most common way of creating a Java string?

Using String literals (C) Signup and view all the answers

What happens when we try to create another string with the exact same value as an existing string using String literals?

A reference to the existing string object is created (D) Signup and view all the answers

Where are strings stored in Java?

String pool (D) Signup and view all the answers

Which of the following is true about the immutability of strings in Java?

Strings cannot be modified after creation (D) Signup and view all the answers

How are strings represented internally in Java?

As arrays of characters (C) Signup and view all the answers

Which method is used to get the substring from the beginIndex till the end of the string?

substring(int beginIndex) (A) Signup and view all the answers

Which method is used to get the substring from beginIndex till endIndex-1?

substring(int beginIndex, int endIndex) (B) Signup and view all the answers

Which method is used to check if the string contains a particular substring or not?

contains(String) (C) Signup and view all the answers

Which method is used for replacing all occurrences of string1 in the string with string2?

replace(String1, String2) (D) Signup and view all the answers

Which method is used to replace only the first occurrence of string1 with string2?

replaceFirst(String1, String2) (D) Signup and view all the answers

Which method is exactly like replace() and replaces all occurrences of string1 with string2?

replaceAll() (B) Signup and view all the answers

Which method is used for finding the index of a character or a string from a given string?

indexOf(String) (B) Signup and view all the answers

Which method is used to check whether a string is empty or not?

isEmpty() (D) Signup and view all the answers

What does the lastIndexOf() method do?

Returns the index of the last occurrence of a character or string (D) Signup and view all the answers

What does the hashCode() method return?

The hashcode of the string (D) Signup and view all the answers

What does the split() method do?

Splits a string based on a delimiter/regular expression (A) Signup and view all the answers

Which split() method limits the number of strings to be split based on the delimiter?

String split(String, int) (A) Signup and view all the answers

What does the toCharArray() method do?

Converts a string to an array of characters (D) Signup and view all the answers

What does the toString() method do?

Converts a string to itself (A) Signup and view all the answers

What does the join() method do?

Joins strings together using a delimiter (C) Signup and view all the answers

Which method returns the index of the first occurrence of a character or string?

lastIndexOf() (D) Signup and view all the answers