Java Advanced Java - Technical Questions and Answers

81.	Which class is extended by all other classes?
	Answer: The Object class is extended by all other classes. Workspace Report errors ... Name : Email: View Answer

82.	Can an object be garbage collected while it is still reachable?
	Answer: A reachable object cannot be garbage collected. Only unreachable objects may be garbage collected.. Workspace Report errors ... Name : Email: View Answer

83.	Is the ternary operator written x : y ? z or x ? y : z ?
	Answer: It is written x ? y : z. Workspace Report errors ... Name : Email: View Answer

84.	What is the difference between the Font and FontMetrics classes?
	Answer: The FontMetrics class is used to define implementation-specific properties, such as ascent and descent, of a Font object. Workspace Report errors ... Name : Email: View Answer

85.	How is rounding performed under integer division?
	Answer: The fractional part of the result is truncated. This is known as rounding toward zero. Workspace Report errors ... Name : Email: View Answer

86.	What happens when a thread cannot acquire a lock on an object?
	Answer: If a thread attempts to execute a synchronized method or synchronized statement and is unable to acquire an object's lock, it enters the waiting state until the lock becomes available. Workspace Report errors ... Name : Email: View Answer

87.	What is the difference between the Reader/Writer class hierarchy and the InputStream/OutputStream class hierarchy?
	Answer: The Reader/Writer class hierarchy is character-oriented, and the InputStream/OutputStream class hierarchy is byte-oriented. Workspace Report errors ... Name : Email: View Answer

88.	What classes of exceptions may be caught by a catch clause?
	Answer: A catch clause can catch any exception that may be assigned to the Throwable type. This includes the Error and Exception types. Workspace Report errors ... Name : Email: View Answer

89.	If a class is declared without any access modifiers, where may the class be accessed?
	Answer: A class that is declared without any access modifiers is said to have package access. This means that the class can only be accessed by other classes and interfaces that are defined within the same package. Workspace Report errors ... Name : Email: View Answer

90.	What is the SimpleTimeZone class?
	Answer: The SimpleTimeZone class provides support for a Gregorian calendar. Workspace Report errors ... Name : Email: View Answer