Technical Interview - Preparation Questions
What is the catch or declare rule for method declarations?
If a checked exception may be thrown within the body of a method, the
method must either catch the exception or declare it in its throws clause.
What is the difference between a MenuItem and a CheckboxMenuItem?
The CheckboxMenuItem class extends the MenuItem class to support a
menu item that may be checked or unchecked.
What is a task's priority and how is it used in scheduling?
A task's priority is an integer value that identifies the relative
order in which it should be executed with respect to other tasks. The scheduler
attempts to schedule higher priority tasks before lower priority tasks.
What class is the top of the AWT event hierarchy?
The java.awt.AWTEvent class is the highest-level class in the AWT event-class
When a thread is created and started, what is its initial state?
A thread is in the ready state after it has been created and started.
Can an anonymous class be declared as implementing an interface and
extending a class?
An anonymous class may implement an interface or extend a superclass,
but may not be declared to do both.
What is the range of the short type?
The range of the short type is -(2^15) to 2^15 - 1.
What is the range of the char type?
The range of the char type is 0 to 2^16 - 1.
In which package are most of the AWT events that support the event-delegation
Most of the AWT-related events of the event-delegation model are defined
in the java.awt.event package. The AWTEvent class is defined in the java.awt
What is the immediate superclass of Menu?
What is the purpose of finalization?
The purpose of finalization is to give an unreachable object the opportunity
to perform any cleanup processing before the object is garbage collected.
Which class is the immediate superclass of the MenuComponent class.
What invokes a thread's run() method?
After a thread is started, via its start() method or that of the Thread
class, the JVM invokes the thread's run() method when the thread is initially
What is the difference between the Boolean & operator and the
If an expression involving the Boolean & operator is evaluated,
both operands are evaluated. Then the & operator is applied to the
operand. When an expression involving the && operator is evaluated,
the first operand is evaluated. If the first operand returns a value of
true then the second operand is evaluated. The && operator is then
applied to the first and second operands. If the first operand evaluates
to false, the evaluation of the second operand is skipped.
Name three subclasses of the Component class.
Box.Filler, Button, Canvas, Checkbox, Choice, Container, Label, List,
Scrollbar, or TextComponent
What is the GregorianCalendar class?
The GregorianCalendar provides support for traditional Western calendars.
Which Container method is used to cause a container to be laid out
What is the purpose of the Runtime class?
The purpose of the Runtime class is to provide access to the Java runtime
How many times may an object's finalize() method be invoked by the
An object's finalize() method may only be invoked once by the garbage
What is the purpose of the finally clause of a try-catch-finally
The finally clause is used to provide the capability to execute code
no matter whether or not an exception is thrown or caught.
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