Utility classes

Which of the following is true about the java.lang.Object class?

• It is the superclass of all classes in Java

• It can only be used with primitive types

• It cannot be extended by any other class

• It provides no useful methods

Which method is used to obtain the current date with the LocalDate class?

• LocalDate.getCurrent()

• LocalDate.ofNow()

• LocalDate.now()

• LocalDate.currentDate()

What does the LocalDateTime class represent?

• A timestamp in milliseconds.

• A date with time zone information.

• A date and time without any time zone.

• Only a time value.

What is a key difference between java.util.Date and java.sql.Date?

• java.util.Date represents only the date, while java.sql.Date includes time.

• java.sql.Date is designed for SQL databases and typically ignores the time part, whereas java.util.Date includes both date and time.

• java.util.Date is immutable, while java.sql.Date is mutable.

• They are functionally identical.

Which class is typically used to represent a precise point in time (including date and time with nanosecond precision) for SQL databases?

• Date
• Datetime
• Time
• Timestamp

Which method of the Random class is used to generate a random integer?

• nextLong()
• nextDouble()
• nextFloat()
• nextInt()

In which package is the Scanner class, used for reading input from the user, located?

• java.util
• java.text
• java.io
• java.lang

Which method in the Math class returns the maximum of two numbers?

• sum
• average
• min
• max