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