Interview Type of Questions
1.What is meant by Java ?
2.What is meant by a class ?
3.What is meant by a method ?
4.What are the OOPS concepts in Java ?
5.What is meant by encapsulation ? Explain with an example
6.What is meant by inheritance ? Explain with an example
7.What is meant by polymorphism ? Explain with an example
8.Is multiple inheritance allowed in Java ? Why ?
9.What is meant by Java interpreter ?
10.What is meant by JVM ?
11.What is a compilation unit ?
12.What is meant by identifiers ?
13.What are the different types of modifiers ?
14.What are the access modifiers in Java ?
15.What are the primitive data types in Java ?
16.What is meant by a wrapper class ?
17.What is meant by static variable and static method ?
18.What is meant by Garbage collection ?
19.What is meant by abstract class
20.What is meant by final class, methods and variables ?
21.What is meant by interface ?
22.What is meant by a resource leak ?
23.What is the difference between interface and abstract class ?
24.What is the difference between public private, protected and static
25.What is meant by method overloading ?
26.What is meant by method overriding ?
27.What is singleton class ?
28.What is the difference between an array and a vector ?
29.What is meant by constructor ?
30.What is meant by casting ?
31.What is the difference between final, finally and finalize ?
32.What is meant by packages ?
33.What are all the packages ?
34.Name 2 calsses you have used ?
35.Name 2 classes that can store arbitrary number of objects ?
36.What is the difference between java.applet.* and java.applet.Applet ?
37.What is a default package ?
38.What is meant by a super class and how can you call a super class ?
39.What is anonymous class ?
40.Name interfaces without a method ?
41.What is the use of an interface ?
42.What is a serializable interface ?
43.How to prevent field from serialization ?
44.What is meant by exception ?
45.How can you avoid the runtime exception ?
46.What is the difference between throw and throws ?
47.What is the use of finally ?
48.Can multiple catch statements be used in exceptions ?
49.Is it possible to write a try within a try statement ?
50.What is the method to find if the object exited or not ?
51.What is meant by a Thread ?
52.What is meant by multi-threading ?
53.What is the 2 way of creating a thread ? Which is the best way and why ?
54.What is the method to find if a thread is active or not ?
55.What are the thread-to-thread communcation ?
56.What is the difference between sleep and suspend ?
57.Can thread become a member of another thread ?
58.What is meant by deadlock ?
59.How can you avoid a deadlock ?
60.What are the three typs of priority ?
61.What is the use of synchronizations ?
62.Garbage collector thread belongs to which priority ?
63.What is meant by time-slicing ?
64.What is the use of ‘this’ ?
65.How can you find the length and capacity of a string buffer ?
66.How to compare two strings ?
67.What are the interfaces defined by Java.lang ?
68.What is the purpose of run-time class and system class
69.What is meant by Stream and Types ?
70.What is the method used to clear the buffer ?
71.What is meant by Stream Tokenizer ?
72.What is serialization and de-serialisation ?
73.What is meant by Applet ?
74.How to find the host from which the Applet has originated ?
75.What is the life cycle of an Applet ?
76.How do you load an HTML page from an Applet ?
77.What is meant by Applet Stub Interface ?
78.What is meant by getCodeBase and getDocumentBase method ?
79.How can you call an applet from a HTML file
80.What is meant by Applet Flickering ?
81.What is the use of parameter tag ?
82.What is audio clip Interface and what are all the methods in it ?
83.What is the difference between getAppletInfo and getParameterInfo ?
84.How to communicate between applet and an applet ?
85.What is meant by event handling ?
86.What are all the listeners in java and explain ?
87.What is meant by an adapter class ?
88.What are the types of mouse event listeners ?
89.What are the types of methods in mouse listeners ?
90.What is the difference between panel and frame ?
91.What is the default layout of the panel and frame ?
92.What is meant by controls and types ?
93.What is the difference between a scroll bar and a scroll panel.
94.What is the difference between list and choice ?
95.How to place a component on Windows ?
96.What are the different types of Layouts ?
97.What is meant by CardLayout ?
98.What is the difference between GridLayout and GridBagLayout
99.What is the difference between menuitem and checkboxmenu item.
100.What is meant by vector class, dictionary class , hash table class,and property class ?
101.Which class has no duplicate elements ?
102.What is resource bundle ?
103.What is an enumeration class ?
104.What is meant by Swing ?
105.What is the difference between AWT and Swing ?
106.What is the difference between an applet and a Japplet
107.What are all the components used in Swing ?
108.What is meant by tab pans ?
109.What is the use of JTree ?
110.How can you add and remove nodes in Jtree.
111.What is the method to expand and collapse nodes in a Jtree ?
112.What is the use of JTable ?
113.What is meant by JFC ?
114.What is the class in Swing to change the appearance of the Frame in Runtime.
115.How to reduce flicking in animation ?
116.What is JDBC ?
117.How do you connect to the database ? What are the steps ?
118.What are the drivers available in JDBC ? Explain
119.How can you load the driver ?
120.What are the different types of statement s ?
121.How can you created JDBC statements ?
122.How will you perform transactions using JDBC ?
123.What are the two drivers for web apllication?
124.What are the different types of 2 tier and 3 tier architecture ?
125.How can you retrieve warning in JDBC ?
126.What is the exception thrown by JDBC ?
127.What is meants by PreparedStatement ?
128.What is difference between PreparedStatement and Statement ?
129.How can you call the stored procedures ?
130.What is meant by a ResultSet ?
131.What is the difference between ExecuteUpdate and ExecuteQuery ?
132.How do you know which driver is connected to a database ?
133.What is DSN and System DSN and differentiate these two ?
134.What is meant by TCP, IP, UDP ?
135.What is the difference between TCP and UDP ?
136.What is a proxy server ?
137.What is meant by URL
138.What is a socket and server sockets ?
139.When MalformedURLException and UnknownHost Exception throws ?
140.What is InetAddress ?
141.What is datagram and datagram packets and datagram sockets ?
142.Write the range of multicast socket IP address ?
143.What is meant by a servlet ?
144.What are the types of servlets ? Explain
145.What is the different between a Servlet and a CGI.
146.What is the difference between 2 types of Servlets ?
147.What is the type of method for sending request from HTTP server ?
148.What are the exceptions thrown by Servlets ? Why ?
149.What is the life cycle of a servlet ?
150.What is meant by cookies ?
151.What is HTTP Session ?
152.What is the difference between GET and POST methods ?
153.How can you run a Servlet Program ?
154.How to commuincate between an applet and a servlet ?
155.What is a Servlet-to-Servlet communcation ?
156.What is Session Tracking ?
157.What are the security issues in Servlets ?
158.What is HTTP Tunneling
159.How do you load an image in a Servlet ?
160.What is Servlet Chaining ?
161.What is URL Rewriting ?
162.What is context switching ?
163.What is meant by RMI ?
164.Explain RMI Architecture ?
165.What is meant by a stub ?
166.What is meant by a skelotn ?
167.What is meant by serialisation and deserialisation ?
168.What is meant by RRL ?
169.What is the use of TL ?
170.What is RMI Registry ?
171.What is rmic ?
172.How will you pass parameter in RMI ?
173.What exceptions are thrown by RMI ?
174.What are the steps involved in RMI ?
175.What is meant by bind(), rebind(), unbind() and lookup() methods
176.What are the advanatages of RMI ?
177.What is JNI ?
178.What is Remote Interface ?
179.What class is used to create Server side object ?
180.What class is used to bind the server object with RMI Registry ?
181.What is the use of getWriter method ?
182.What is meant by Javabeans ?
183.What is JAR file ?
184.What is meant by manifest files ?
185.What is Introspection ?
186.What are the steps involved to create a bean ?
187.Say any two properties in Beans ?
188.What is persistence ?
189.What is the use of beaninfo ?
190.What are the interfaces you used in Beans ?
191.What are the classes you used in Beans ?
