Java Core Java - Technical Questions and Answers

71.	What is the return type of a program's main() method?
	Answer: void. Workspace Report errors ... Name : Email: View Answer

72.	If a variable is declared as private, where may the variable be accessed?
	Answer: A private variable may only be accessed within the class in which it is declared. Workspace Report errors ... Name : Email: View Answer

73.

What do you understand by private, protected and public?

74.	What is Downcasting ?
	Answer: Downcasting is the casting from a general to a more specific type, i.e. casting down the hierarchy Workspace Report errors ... Name : Email: View Answer

75.	What modifiers may be used with an inner class that is a member of an outer class?
	Answer: A (non-local) inner class may be declared as public, protected, private, static, final, or abstract. Workspace Report errors ... Name : Email: View Answer

76.	How many bits are used to represent Unicode, ASCII, UTF-16, and UTF-8 characters?
	Answer: Unicode requires 16 bits and ASCII require 7 bits Although the ASCII character set uses only 7 bits, it is usually represented as 8 bits. UTF-8 represents characters using 8, 16, and 18 bit patterns. UTF-16 uses 16-bit and larger bit patterns. Workspace Report errors ... Name : Email: View Answer

77.	What restrictions are placed on the location of a package statement within a source code file?
	Answer: A package statement must appear as the first line in a source code file (excluding blank lines and comments). Workspace Report errors ... Name : Email: View Answer

78.	What is a native method?
	Answer: A native method is a method that is implemented in a language other than Java. Workspace Report errors ... Name : Email: View Answer

79.	What are order of precedence and associativity, and how are they used?
	Answer: Order of precedence determines the order in which operators are evaluated in expressions. Associatity determines whether an expression is evaluated left-to-right or right-to-left. Workspace Report errors ... Name : Email: View Answer

80.	Can an anonymous class be declared as implementing an interface and extending a class?
	Answer: An anonymous class may implement an interface or extend a superclass, but may not be declared to do both. Workspace Report errors ... Name : Email: View Answer