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Java Programming Objective Type Question Bank
1.Who invented Java Programming?
A . Guido van Rossum
B . James Gosling
C . Dennis Ritchie
D . Bjarne Stroustrup
2.Which component is used to compile, debug and execute the java programs?
A . JRE
B . JIT
C . JDK
D . JVM
3.Which one of the following is not a Java feature?
A . Object-oriented
B . Use of pointers
C . Portable
D . Dynamic and Extensible
4.Which of these cannot be used for a variable name in Java?
A . identifier & keyword
B . identifier
C . keyword
D . none of the mentioned
5.Which of the following is a type of polymorphism in Java Programming?
A . Multiple polymorphism
B . Compile time polymorphism
C . Multilevel polymorphism
D . Execution time polymorphism
6.Which of these are selection statements in Java?
A . break
B . continue
C . for()
D . if()
7.Which of the following is a superclass of every class in Java?
A . ArrayList
B . Abstract class
C . Object class
D . String
8.Which one of the following is not an access modifier?
A . Protected
B . Void
C . Public
D . Private
9.What is the numerical range of a char data type in Java?
A . 0 to 256
B . -128 to 127
C . 0 to 65535
D . 0 to 32767
10.In which process, a local variable has the same name as one of the instance variables?
A . Serialization
B . Variable Shadowing
C . Abstraction
D . Multi-threading
11.What do you mean by nameless objects?
A . An object created by using the new keyword.
B . An object of a superclass created in the subclass.
C . An object without having any name but having a reference.
D . An object that has no reference.
12.Which option is false about the final keyword?
A . A final method cannot be overridden in its subclasses.
B . A final class cannot be extended.
C . A final class cannot extend other classes.
D . A final method can be inherited.
13.In which memory a String is stored, when we create a string using new operator?
A . Stack
B . String memory
C . Heap memory
D . Random storage space
14.Which of the given methods are of Object class?
A . notify(), wait( long msecs ), and synchronized()
B . wait( long msecs ), interrupt(), and notifyAll()
C . notify(), notifyAll(), and wait()
D . sleep( long msecs ), wait(), and notify()
15.What is the initial quantity of the ArrayList list?
A . 5
B . 10
C . 0
D . 100
16.What is meant by the classes and objects that dependents on each other?
A . Tight Coupling
B . Cohesion
C . Loose Coupling
D . None of the above
17.Which of this keyword must be used to inherit a class?
A . super
B . this
C . extent
D . extends
18.A class member declared protected becomes a member of subclass of which type?
A . public member
B . private member
C . protected member
D . static member
19.Which of these is correct way of inheriting class A by class B?
A . class B + class A {}
B . class B inherits class A {}
C . class B extends A {}
D . class B extends class A {}
20.Which of these keyword is used to refer to member of base class from a sub class?
A . upper
B . super
C . this
D . none
21.Which inheritance in java programming is not supported?
A . Multiple inheritance using classes
B . Multiple inheritance using interfaces
C . Multilevel inheritance
D . Single inheritance
22.Which of these keywords can be used to prevent inheritance of a class?
A . super
B . constant
C . class
D . final
23.Which of these class relies upon its subclasses for complete implementation of its methods?
A . Object class
B . abstract class
C . ArrayList class
D . None of the mentioned
24.Properties are implemented using ___ in Java.
A . Methods
B . Variables
C . Interfaces
D . All the above
25.Creating an object from a class is also called ____.
A . Initializing
B . Instantiating
C . Interfacing
D . None of the above
26.An object is created at __ time in Java.
A . Compile-time
B . Run time
C . Assembling time
D . None of the above
27.Which of the following statements is a valid declaration of an object that belongs to "MyClass"?
A . MyClass obj = new MyClass();
B . MyClass obj = new MyClass;
C . obj = new MyClass();
D . new MyClass obj;
28.Which of these operators is used to allocate memory for an object?
A . malloc
B . alloc
C . new
D . realloc
29.____________________ is the address of the memory location where the object is stored
A . Memory
B . Variable
C . Reference
D . None
30.There is a special portion of memory called the _____________ where the object lives.
A . Heap
B . Pile
C . Stack
D . All of these
31.When an object is created, in addition of allocating memory, a special method called ________________ is executed to perform initial task.
A . Function
B . Constructor
C . Class
D . Method
32.Every ________________ has it`s own set of data
A . Class
B . Variable
C . Operator
D . Object
33.Java has a garbage collector that looks for unused _____________ and reclaims the memory that those objects are using.
A . Objects
B . Variables
C . Cells
D . Memory spaces
34.Protection of data is possible with the use of access __________________
A . Modifiers
B . Operators
C . Methods
D . None of these
35._____________________ variables can be accessed without creating an instance of a class
A . public
B . new
C . static
D . private
36.Object-oriented programming languages provides reusability feature using _____________
A . polymorphism
B . Abstraction
C . Inheritance
D . Encapsulation
37.Inheritance models __________________ relationship between two classes.
A . is-a
B . its-a
C . has-a
D . is-at
38.___________________ refers more than one method having same name but different parameters?
A . Method overloading
B . Method overriding
C . Duplicate methods
D . All
39.___________________ members are available as `private` members in the inherited sub class
A . public
B . private
C . protected
D . default
40.___________________ variables are variables defined within a class but outside any method.
A . Instance
B . Private
C . Local
D . Global
41.Which of these jump statements can skip processing the remainder of the code in its body for a particular iteration?
A . break
B . return
C . exit
D . continue
42.Which of the following is not a decision making statement?
A . if
B . if-else
C . switch
D . do-while
43.Which of these class is superclass of String and StringBuffer class?
A . java.util
B . java.lang
C . ArrayList
D . None of the mentioned
44.Which of this method of class String is used to obtain a length of String object?
A . get()
B . Sizeof()
C . lengthof()
D . length()
45.Which of these method of class String is used to extract a single character from a String object?
A . CHARAT()
B . chatat()
C . charAt()
D . ChatAt()
46.Which of these constructors is used to create an empty String object?
A . String()
B . String(void)
C . String(0)
D . None of the mentioned
47.Which of these method of class String is used to compare two String objects for their equality?
A . equals()
B . Equals()
C . isequal()
D . Isequal()
48.Which feature comes under compile time polymorphism?
A . Method overloading
B . Constructor overloading
C . Method overriding
D . Both A and B
49.Final keyword in java is used with
A . class
B . class fields
C . class methods
D . All of the above
50.Which of these keywords can be used to prevent Method overriding?
A . static
B . constant
C . protected
D . final
51.Which of these keywords is used to define interfaces in Java?
A . intf
B . Intf
C . interface
D . Interface
52.Which of these packages contains the exception Stack Overflow in Java?
A . java.io
B . java.system
C . java.lang
D . java.util
53.An interface with no fields or methods is known as a ______.
A . Runnable Interface
B . Marker Interface
C . Abstract Interface
D . CharSequence Interface
54.Which keyword is used for accessing the features of a package?
A . package
B . import
C . extends
D . export
55.Correct statement about a class and interface is/are
A . An interface can extend multiple interfaces
B . A class can implement multiple interfaces.
C . Java support multiple inheritance using interfaces.
D . All of the above.
56.Which of the following is the correct way of importing an entire package ‘pkg’?
A . import pkg.
B . Import pkg.
C . import pkg.*
D . Import pkg.*
57.Which of the following package stores all the standard java classes?
A . lang
B . java
C . util
D . java.packages
58.Which of these access specifiers can be used for an interface?
A . Public
B . Protected
C . private
D . All of the mentioned
59.What kind of methods does an interface contain by default?
A . abstract
B . static
C . final
D . private
60.A Java static method can not be ___.
A . private or protected
B . final
C . abstract
D . All the above
61.Package in Java is a mechanism to encapsulate a ______________.
A . Classes
B . Sub Packages
C . Interfaces
D . All of the above
62.Packages that are inside another package are the _________
A . packages
B . nested packages
C . util subpackages
D . subpackages
63.Which one is correct declaration for implementing two interfaces?
A . class C implements A, B
B . class C implements A, implements B
C . class C implements A extends B
D . class C implements A.B
64. ………… Environment variable identifies the location of Java compiler?
A . CLASSPATH
B . PATH
C . JAVAPATH
D . COMPILERPATH
65. PATH environment variable can be set using ______ .
A . Command line
B . Control panel
C . Both A and B
D . Java compiler
66. How to display value of PATH environment variable at command line?
A . PATH
B . Set PATH
C . Show PATH
D . Display PATH
67. PATH environment variable identifies the location of ______
A . Java compiler
B . Java interpreter
C . Java tools
D . All of the above
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