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Parameswaran Thangavel
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hi
i had a few questions please answer it with little

bit of explanation

Which most closely matches a description of a Java

Map?
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1) A vector of arrays for a 2D geographic

representation
2) A class for containing unique array elements
3) A class for containing unique vector elements
4) An interface that ensures that implementing

classes cannot contain duplicate keys

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What can cause a thread to stop executing?

1) The program exits via a call to System.exit(0);
2) Another thread is given a higher priority
3) A call to the thread's stop method.
4) A call to the halt method of the Thread class?

i didn't what stop means here.whether pushing the

thread to the dead state or to waiting mode.
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anonymous class will extend or not

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what the instanceof operator meant for

The instanceof operator can be used to determine

if a reference is an instance of a particular

primitive wrapper class


i had seen the above answer in mock exam

i doubt it.is instanceof is meant only for wrapper

class.
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Significance transient and volatile are Java
modifiers

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Say yes or no

Final Modifier+class----->Can't extended.
Final Modifier+Method----->Can't overridden.

---------------------------------------------

any way to find the length of the string like that

of array

---------------------------------------------
 
ankur rathi
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Which most closely matches a description of a Java
Map?
---------------------------------------------
1) A vector of arrays for a 2D geographic
representation
2) A class for containing unique array elements
3) A class for containing unique vector elements
4) An interface that ensures that implementing
classes cannot contain duplicate keys

---------------------------------------------




The answer is 4 . check the API .
 
ankur rathi
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any way to find the length of the string like that
of array


Try this :

String s = "aaa";
s.length();
 
ankur rathi
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Say yes or no

Final Modifier+class----->Can't extended.
Final Modifier+Method----->Can't overridden.

yes , one more in addition ,

Final Modifier + variable ----> can't reinitialized
 
ankur rathi
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what the instanceof operator meant for

The instanceof operator can be used to determine

if a reference is an instance of a particular

primitive wrapper class


i had seen the above answer in mock exam

i doubt it.is instanceof is meant only for wrapper

class.


Yes , you are right .

instanceof can be used for any class .
 
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