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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Can you write a Java class that could be used both as an applet as well as an application? |
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| 102. |
How to add menushortcut to menu item? |
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| 103. |
Explain the use of sublass in a Java program? |
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| 104. |
What are use cases? |
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| 105. |
What is Serialization and deserialization? |
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| 106. |
What is the difference between static and non-static variables? |
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| 107. |
Which class should you use to obtain design information about an object? |
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| 108. |
What is the difference between the Reader/Writer class hierarchy and the InputStream/OutputStream class hierarchy? |
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| 109. |
What is the purpose of File class? |
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| 110. |
What is the difference between the paint() and repaint() methods? |
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| 111. |
Which package has light weight components? |
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| 112. |
What is the difference between a Window and a Frame? |
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| 113. |
What are Wrapper classes? |
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| 114. |
How many bits are used to represent Unicode, ASCII, UTF-16, and UTF-8 characters? |
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| 115. |
Why Vector class is used? |
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| 116. |
What is the difference between yielding and sleeping? |
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| 117. |
Does it matter in what order catch statements for FileNotFoundException and IOException are written? |
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| 118. |
What invokes a thread's run() method? |
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| 119. |
How does multi-threading take place on a computer with a single CPU? |
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| 120. |
What are the ways in which a thread can enter the waiting state? |
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| 121. |
What is NullPointerException? |
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| 122. |
What is final class? |
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| 123. |
Difference between Overloading and Overriding? |
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| 124. |
Define composition? |
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| 125. |
What is static block? |
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| 126. |
Can a constructor be made final? |
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| 127. |
What is the purpose of default constructor? |
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| 128. |
What is the difference between object oriented programming language and object based programming language? |
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| 129. |
Define JIT compiler? |
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| 130. |
What is a WAR file? |
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| 131. |
What is JAR file? |
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| 132. |
Define JRE i.e. Java Runtime Environment? |
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| 133. |
Explain the following line used under Java Program − |
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| 134. |
Difference between throw and throws? |
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| 135. |
What is Comparable Interface? |
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| 136. |
Explain TreeSet? |
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| 137. |
Explain Set Interface? |
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| 138. |
Explain the usage of this() with constructors? |
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| 139. |
Define immutable object? |
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| 140. |
Explain garbage collection in Java? |
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| 141. |
An applet extend which class? |
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| 142. |
What is an applet? |
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| 143. |
What are the two ways in which Thread can be created? |
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| 144. |
What do you mean by Multithreaded program? |
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| 145. |
Why Packages are used? |
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| 146. |
Define Packages in Java? |
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| 147. |
Give some features of Interface? |
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| 148. |
What is an Interface? |
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| 149. |
What is the primary benefit of Encapsulation? |
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| 150. |
When Abstract methods are used? |
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