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Java Quiz For Beginners

93 Questions  I  By Xooxa
Java Quiz for Beginners
It is created for Beginners in Java. This is to test the knowledge of any Java Developer wannabe.

  
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Question Excerpt

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1.  Following code will result in: class A { public static void main(String [] args) {A a = new B(); }} class B extends A {}
A.
B.
C.
D.
2.  Following code will result in: class A { public static void main(String [] args) {B b = new A(); }} class B extends A {}
A.
B.
C.
D.
3.  Methods that are marked protected can be called in any subclass of that class.
A.
B.
4.  Choose the best definition of an object
A.
B.
C.
5.  Native methods can be 'abstract'
A.
B.
6.  Following code will result in: class A { int x = 1; public static void main(String [] args) { System.out.println("x is " + x); }}
A.
B.
C.
D.
7.  Which of the following is not a Java keyword?
A.
B.
C.
D.
8.  In a ‘for’ loop, what section of the loop is not included in the parentheses after “for” ?
A.
B.
C.
D.
9.  A UML association from class A to class B means
A.
B.
C.
D.
10.  With inheritance, a derived subclass object can directly access any
A.
B.
C.
D.
11.  Following code will result in: int num = 8/0;
A.
B.
C.
D.
12.  Choose the appropriate data type for this value: true    
A.
B.
C.
D.
13.  The following prototype shows that a Cylinder subclass is derived from a superclass called Circle
A.
B.
C.
D.
14.  An abstract class can have non-abstract methods.
A.
B.
15.  Which of the following always need a Capital letter ?    
A.
B.
C.
D.
16.  What is the keyword used in java to create an object?
A.
B.
C.
D.
17.  Given the declaration : int [ ] ar = {1,2,3,4,5}; What is the value of ar[4]?
A.
B.
C.
D.
18.  How is the layout of widgets on a panel specified?
A.
B.
C.
D.
19.  What loop will display each of the numbers in this array on a separate line: float [ ] nums= {1.1f, 2.2f, 3.3f};
A.
B.
C.
D.
20.  What is an Applet ?
A.
B.
C.
D.
21.  Class B inherits from Class A, what cannot be said:
A.
B.
C.
D.
22.  The last value in an array called ar can be found at index:
A.
B.
C.
D.
23.  The size of an applet is set using ...
A.
B.
C.
D.
24.  Following code will result in: float num = 5/0;
A.
B.
C.
D.
25.  If we declare int [ ] ar = {1,2,3,4,5,6}; The size of array ar is:
A.
B.
C.
D.
26.  Choose the appropriate data type for this field: kindOfBird    
A.
B.
C.
D.
27.  Which one needs a web page to run
A.
B.
C.
D.
28.  Following code will result in: int num = 6.7;
A.
B.
C.
D.
29.  Choose the appropriate data type for this field: numberOfEggs    
A.
B.
C.
D.
30.  Which package do you need to use widgets such as JApplet, JFrame, JPanel and JButton?
A.
B.
C.
D.
31.  Which one adds the widget mainPanel to an applet in the init method of the applet?
A.
B.
C.
D.
32.  Choose the appropriate data type for this value: female    
A.
B.
C.
D.
33.  Given the declaration : int [ ] ar = {1,2,3,4,5}; What is the value of ar[3]?
A.
B.
C.
D.
34.  The methods wait(), notify() and notifyAll() in Object need to be called from synchronized pieces of code.
A.
B.
35.  Choose the appropriate data type for this value: 5.5    
A.
B.
C.
D.
36.  What is the size of a Char in Java?
A.
B.
C.
D.
37.  What would display from the following statements? int [ ] nums = {1,2,3,4,5,6}; System.out.println((nums[1] + nums[3]));
A.
B.
C.
D.
38.  What does GUI stand for?
A.
B.
C.
D.
39.  Java keywords are written in lowercase as well as uppercase.
A.
B.
40.  A null reference may be used to access a static variable or method.
A.
B.
41.  Choose the appropriate data type for this value: "1"    
A.
B.
C.
D.
42.  What is an assignment statement ?
A.
B.
C.
D.
43.  What does AWT stands for ?
A.
B.
C.
D.
44.  A class cannot be declared:
A.
B.
C.
45.  Choose the best definition for a Class.    
A.
B.
C.
46.  What is a loop ?
A.
B.
C.
D.
47.  Can you compare a boolean to an integer?
A.
B.
48.  If class A implements an interface does it need to implement all methods of that interface?
A.
B.
49.  An object could be ...
A.
B.
C.
D.
50.  What is the difference between private and public functions ?
A.
B.
C.
D.
51.  Choose the appropriate data type for this field: weightInKilos    
A.
B.
C.
D.
52.  A UML association is ...
A.
B.
C.
D.
53.  How can you prevent a member variable from becoming serialized?
A.
B.
C.
D.
54.  The range of indices for an array always start at:
A.
B.
C.
D.
55.  What is an instanceof?
A.
B.
C.
D.
56.  An array holds:
A.
B.
C.
D.
57.  Synchronized is a keyword to tell a Thread to grab an Object lock before continuing execution.
A.
B.
58.  Primitive datatypes are allocated on a stack.
A.
B.
59.  Which one adds the widget mainPanel to a frame in the constructor of the frame?
A.
B.
C.
D.
60.  How to define a JButton with the caption test?
A.
B.
C.
D.
61.  Java runs on _______.
A.
B.
C.
D.
62.  Inner classes can be defined within methods.
A.
B.
63.  What is the proper way to declare a variable ?
A.
B.
C.
D.
64.  Which one could be used as the main container in a Java application?
A.
B.
C.
D.
65.  What is the main function of any variable ?
A.
B.
C.
D.
66.  A class can be transient
A.
B.
67.  If classes Student, Staff and Faculty extend class Person, which one makes sense:
A.
B.
C.
68.  What is the role of the constructor? 
A.
B.
C.
69.  What displays from the following statements? String word = "abcde"; for (int i = 0; i <4; i+=2) System.out.print(word[i]);
A.
B.
C.
D.
70.  Following code will result in: int a1 = 5; double a2 = (float)a1;
A.
B.
C.
D.
71.  Given the declaration int [ ] nums = {8, 12, 23, 4, 15}, what expression will display the first element in the array (ie the number 8)
A.
B.
C.
D.
72.  Which of the following means that in order for the conditional to happen, either x must be less than 3 or y must be greater than or equal to 4 ?
A.
B.
C.
D.
73.  What will be the value of “num” after the following statements? int num; num = (5+4); num = num / 9; num = 9;
A.
B.
C.
D.
74.  Object-Oriented Programming means ...  
A.
B.
C.
D.
75.  If you want your conditional to depend on two conditions BOTH being true, what is the proper notation to put between the two Boolean statements ?
A.
B.
C.
D.
76.  Choose the appropriate data type for this value: "volatile"    
A.
B.
C.
D.
77.  What is essential in making sure that your loop is not infinite ?
A.
B.
C.
D.
78.  If none of the private/protected/public is specified for a member, that member ...
A.
B.
C.
D.
79.  The default statement of a switch is always executed.
A.
B.
80.  We have three classes: ATM, ATM Display and Account. The ATM has one ATM Display and works by calling methods on class Account. Which will be shown as an association in UML?
A.
B.
C.
D.
81.  Choose the appropriate data type for this value: A    
A.
B.
C.
D.
82.  A class is...
A.
B.
C.
D.
83.  Which one is not correct?
A.
B.
C.
D.
84.  What is a member of a class
A.
B.
C.
D.
85.  Choose the appropriate data type for this value: 1
A.
B.
C.
D.
86.  Which is NOT a section of all types of loops ?
A.
B.
C.
D.
87.  Choose the appropriate data type for this field: isSwimmer    
A.
B.
C.
D.
88.  Integer a = new Integer(2); Integer b = new Integer(2); What happens when you do if (a==b)?
A.
B.
C.
D.
89.  What is the correct syntax for java main method?
A.
B.
C.
D.
90.  What's the difference between an Applet and an application ?
A.
B.
C.
D.
91.  The most common use of an array is to:
A.
B.
C.
D.
92.  Which is not a part of defining an object?
A.
B.
C.
D.
93.  The size of a frame is set using ...
A.
B.
C.
D.
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