Java Programming - 14

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

Select The Blank
Question: After calling start( ) NewThread, constructor returns to
________.
Correct Answer: main( )
Your Answer: main( )

True/False
Question: Nested if is less efficient then switch statement.
Correct Answer: True
Your Answer: True

Match The Following
Question Correct Answer Your Answer
Constructor Initialization object Initialization object
Parameters Method Generalized Method Generalized
Memory deallocation Garbage Collection Garbage Collection
This Current Object Current Object

Multiple Choice Multiple Answer
Question: Which thread is created automatically when the program is
started?
Correct Answer: Main thread
Your Answer: Main thread , Current thread

Select The Blank
Question: When java program starts up, one thread begin runing and
it is called ________thread.
Correct Answer: main( )
Your Answer: main( )

Multiple Choice Single Answer
Question: Multiple Choice Single Response
Correct Answer: Object oriented programming.
Your Answer: Systems Programming.

Multiple Choice Single Answer
Question: Which statement will always execute the body of a loop at
least once?
Correct Answer: Do
Your Answer: Do

True/False
Question: In While loop condition can be any Boolean expression
Correct Answer: True
Your Answer: True

Multiple Choice Multiple Answer
Question: By Providing the interface keyword, Java allows you to
fully utilize the which aspect of polymorphism?
Correct Answer: One interface , Multiple methods
Your Answer: One interface , Multiple methods

True/False
Question: Short data type range is -30,376 to 32768.
Correct Answer: False
Your Answer: False

Multiple Choice Single Answer
Question: Which is a public static member of thread?
Correct Answer: Currenthread( )
Your Answer: Currenthread( )

Multiple Choice Multiple Answer
Question: Which of the following is the declaration of an array of
string objects?
Correct Answer: String[ ] s; , String [ ]s: , String[ s]:
Your Answer: String[ s]: , String s[ ]:

Multiple Choice Multiple Answer
Question: There are two distinct types of multitasking. Which are
those?
Correct Answer: Process based , Thread-base
Your Answer: Process based , Thread-base

Select The Blank
Question: ________ is probably the least used java data type
Correct Answer: short
Your Answer: short

True/False
Question: Casting between primitive types allows conversion of one
primitive type to another.
Correct Answer: True
Your Answer: True

Multiple Choice Multiple Answer
Question: What are different modifiers?
Correct Answer: Private , Protected , Final
Your Answer: Private , Protected , Final

Multiple Choice Single Answer
Question: A Java application can execute anywhere on the network,
this implements that Java is :-
Correct Answer: Architecture neutral
Your Answer: Architecture neutral

Multiple Choice Single Answer
Question: Java Applets are intelligent programs means :-
Correct Answer: They can react to user input and dynamically change.
Your Answer: They have additional intelligence.

Select The Blank
Question: The name of the new thread is specified by ________.
Correct Answer: threadName
Your Answer: Newthread

Select The Blank
Question: ________ is referred by a variable candidate for garbage
collection when the variable goes out of scope.
Correct Answer: Objects
Your Answer: Objects

Select The Blank
Question: The ________ repeat a set of code while the condition is
false.
Correct Answer: While loop
Your Answer: For

Multiple Choice Single Answer
Question: Select the facility provided along with JVM which enhances
speed of execution :-
Correct Answer: Just-In-Time (JIT) compiler.
Your Answer: Just-In-Time (JIT) compiler.

Select The Blank
Question: ________ is an instance of the class.
Correct Answer: Object
Your Answer: Object

Multiple Choice Single Answer
Question: What is a data structure that controls the state of a
collection of threads as a whole?
Correct Answer: Thread group
Your Answer: Thread group

Multiple Choice Single Answer
Question: Which statement used inside a set of nested loops, will
only break out of the innermost loop?
Correct Answer: Break
Your Answer: Break

Multiple Choice Multiple Answer
Question: Which are the keywords use in switch statement?
Correct Answer: Case , Default
Your Answer: Case , Default

Multiple Choice Single Answer
Question: The argument to which specifies the delayperiod in
milliseconds
Correct Answer: sleep( )
Your Answer: sleep( )

Multiple Choice Multiple Answer
Question: Which loops can be nested in java?
Correct Answer: While , Do-while , For
Your Answer: While , Do-while , For

True/False
Question: If the break statement is omited in switch statement, then
execution will continue on into the next case.
Correct Answer: True
Your Answer: True

Match The Following
Question Correct Answer Your Answer
Exit any loop Break Exit
If Else Else
Loop While While
Jump Break, continue, return Break, continue, return

Multiple Choice Single Answer
Question: To import a class, what is a syntax used?
Correct Answer: import classname;
Your Answer: import classname;

Select The Blank
Question: The ________ keyword halts the execution of the current
loop and forces control out of the loop.
Correct Answer: Break
Your Answer: Break

Multiple Choice Multiple Answer
Question: Java's multithreading system is built upon :-
Correct Answer: Thread class , Its methods , Companion interface
Your Answer: Thread class , Its methods , Companion interface

True/False
Question: When an object is referenced, it mean that it has been
identified by the finalizer method for garbage collection.
Correct Answer: False
Your Answer: True

Multiple Choice Single Answer
Question: Which Control Statements allow the program to choose
different paths of execution?
Correct Answer: Selection
Your Answer: Selection

Multiple Choice Multiple Answer
Question: Method definition has four parts, they are :-
Correct Answer: Name of the method , Type of object , List of
parameters
Your Answer: Name of the method , List of parameters

Select The Blank
Question: There are ________ kinds of Floating point type
Correct Answer: Two
Your Answer: Two

Multiple Choice Multiple Answer
Question: What returns a reference to the thread in which it is
called?
Correct Answer: Method , Class , Object
Your Answer: Method , Class , Object

Multiple Choice Single Answer
Question: Which statement defines a name space in which classes are
stored?
Correct Answer: package
Your Answer: objects

Select The Blank
Question: ________ is an instance of a class that implements the
runnable interface.
Correct Answer: threadOb
Your Answer: threadOb

Multiple Choice Multiple Answer
Question: The Stack performs which two function?
Correct Answer: pop( ) , push( )
Your Answer: pop( ) , push( )

True/False
Question: The for statement loop can be infinite.
Correct Answer: True
Your Answer: True

True/False
Question: A thread's priority is used to decide when to switch from
one running thread to the next, this is called as the context switch.
Correct Answer: True
Your Answer: True

Multiple Choice Multiple Answer
Question: Which one does not extend java.lang.Number?
Correct Answer: Boolean , Character
Your Answer: Integer , Boolean , Character

Multiple Choice Single Answer
Question: If you do not implement all the methods of an interface
while implementing, what specifier should you use for the class ?
Correct Answer: abtract
Your Answer: abtract

True/False
Question: Running threads can be suspended, which temporarily
suspends its activity.
Correct Answer: True
Your Answer: True

Multiple Choice Single Answer
Question: What are the possible access modifiers while implementing
interface methods?
Correct Answer: public
Your Answer: public