Java Quiz For Beginners

93 Questions  I  By Xooxa
Please take the quiz to rate it.

 Java Quiz For Beginners
It is created for Beginners in Java. This is to test the knowledge of any Java Developer wannabe.

  
Changes are done, please start the quiz.


Questions and Answers

Removing question excerpt is a premium feature

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

Removing ad is a premium feature

Upgrade and get a lot more done!
Take Another Quiz
We have sent an email with your new password.