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Which of the following statements correctly describes an interface?
A) It's a concrete classB) It's a superclassC) It's a type of abstract class
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When you read your e-mail, you are viewing _________ data
A) ActiveB) PassiveC) BothD) None of the above
Rahul
- Jan 13th, 2021
Passive
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State true or false :- For externalizable objects the class is solely responsible for the external format of its contents
A) TrueB) False
Himanshu Tyagi
- Dec 28th, 2020
True
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_____________ is the process by which one object acquires the properties of another object
A) EncapsulationB) ClassC) InheritenceD) Polymorphism
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You would use the ____ operator to create a single instance of a named class.
A) newB) dotC) equalsD) none of the above
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Which of the following can you perform using the File class? (Select multiple)
A) Change the current directoryB) Return the name of the parent directoryC) Delete a fileD) Find if a file contains text or binary information
preethi
- Nov 12th, 2020
Change the current directory
Welabeau Cava
- Jan 26th, 2011
A) Change the current directoryB) Return the name of the parent directoryC) Delete a file
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The this reference is used in conjunction with ___methods.
A) staticB) non-staticC) privateD) protected.
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What is the data type for the parameter of the sleep() method?
A) doubleB) intC) longD) float
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Which of the following is not a wrapper class?
A) StringB) IntegerC) BooleanD) Character
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An interface contains _________ methods
Skill/Topic: InheritanceA) AbstractB) Non-abstract C) Implemented D) Un-implemented
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Which of the following methods cause the String object referenced by s to be changed? (Select multiple)
A) s.concat( )B) s.toUpperCase( )C) s.replace( )D) s.valueOf( )
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What is the difference between a Choice and a List
A Choice is displayed in a compact form that requires you to pull it down to see the listof availablechoices. Only one item may be selected from a Choice. A List may be displayed in such away that severalList items are visible. A List supports the selection of one or more List items.
Anurag yadav
- Oct 9th, 2019
Choice and list awt
Sandhya.Kishan
- Jun 11th, 2012
Choice contains a list of items and we can only select one item from a choice.
List is used to display several items and we can select more than one item from a list. -
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Which of the following types of class members can be part of the internal part of a class? (Select multiple)
A) Public instance variablesB) Private instance variablesC) Public methodsD) Private methods
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Which of the following declare an array of string objects? (Select Multiple)
A) String[ ] s;B) String [ ]s:C) String[ s]:D) String s[ ]:
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Java Interview Questions
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