Object oriented programming in java

What is the focus of Chapter 3?

• Logical programming

• Functional programming

• Object-oriented programming

• Procedural programming

What is class abstraction?

• Implementing interfaces in classes

• Creating new classes from existing classes

• Separation of class implementation from the use of a class

• Combining data and methods into objects

What is the purpose of the wrapper classes in Java?

• To handle exceptions in Java programs

• To hide the implementation details of a class

• To wrap primitive values into objects

• To define abstract data types

What is the main difference between StringBuilder and String?

• StringBuilder is a primitive data type while String is an object

• StringBuilder is faster for string manipulation than String

• StringBuilder is immutable while String is mutable

• String is more memory-efficient than StringBuilder

What is the purpose of BigInteger and BigDecimal classes?

• To handle very large integers and high precision floating-point values

• To perform mathematical operations on strings

• To convert primitive types to wrapper classes

• To manipulate arrays of characters

What does the matches method in Java String class do?

• Checks if two strings are equal

• Replaces all occurrences of a substring in a string

• Checks if a string matches a specific pattern

• Splits a string into an array of substrings based on a delimiter

What is the purpose of regular expressions in string manipulation?

• To convert strings to numbers

• To split strings into characters

• To encrypt and decrypt strings

• To define patterns for matching, replacing, and splitting strings

What does the replaceAll method in Java String class do?

• Checks if a string matches a specific pattern

• Splits a string into an array of substrings based on a delimiter

• Replaces all occurrences of a substring in a string with a new substring

• Replaces the first occurrence of a substring in a string

What is the purpose of the split method in Java String class?

• To replace all occurrences of a substring in a string

• To check if a string matches a specific pattern

• To concatenate multiple strings together

• To split a string into an array of substrings based on a delimiter

What is the benefit of using StringBuilder over String for string manipulation?

• StringBuilder is immutable while String is mutable

• StringBuilder is more memory-efficient than String

• StringBuilder provides better performance for string comparison operations

• StringBuilder allows for dynamic modification of strings without creating new objects