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MCQOPTIONS
This section includes 215 Mcqs, each offering curated multiple-choice questions to sharpen your Technical Programming knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Which of the following package stores all the standard java classes?a) jav |
| A. | lang |
| B. | java |
| C. | java.util |
| D. | java.packages |
| Answer» B. java | |
| 152. |
What is the preferred way to handle an object's events in Java 2? |
| A. | Override the object's handleEvent( ) method. |
| B. | Add one or more event listeners to handle the events |
| C. | Have the object override its process Event ( ) methods. |
| D. | Have the object override its dispatch Event ( ) methods. |
| Answer» C. Have the object override its process Event ( ) methods. | |
| 153. |
In order for a source code file, containing the public class test, to successfully compile,which of the following must be true? |
| A. | It must have a package statement |
| B. | It must be named test.java |
| C. | It must import java.lang |
| D. | It must declare a public class named test. |
| Answer» C. It must import java.lang | |
| 154. |
java.awt.Component class method getLocation() returns Point (containg x and y cordinate).What does this x and y specify |
| A. | Specify the postion of components lower-left component in the coordinate space of the component's parent. |
| B. | Specify the postion of components upper-left component in the coordinate space of the component's parent. |
| C. | Specify the postion of components upper-left component in the coordinate space of the screen. |
| D. | none |
| Answer» C. Specify the postion of components upper-left component in the coordinate space of the screen. | |
| 155. |
What are the sequences of method executed when an Applet starts execution? |
| A. | init(),start(),stop(),destroy() |
| B. | load(),start(),stop(),unload() |
| C. | init(),activate(),deactivate(),destroy() |
| D. | start(),init(),destroy(),stop() |
| Answer» B. load(),start(),stop(),unload() | |
| 156. |
Which of these events will be generated if scroll bar is manipulated? |
| A. | ActionEvent |
| B. | ComponentEvent |
| C. | AdjustmentEvent |
| D. | WindowEvent |
| Answer» E. | |
| 157. |
To design a general-purpose search method, searchList, to search a list, which of thefollowing must be parameters of the method searchList? (i) The array containing the list. (ii) The length of the list. (iii) The search item. (iv) A boolean variable indicating whether the search is successful. |
| A. | (i) and (ii) |
| B. | (i), (ii), and (iii) |
| C. | (ii), (iii), and (iv) |
| D. | (i), (ii), (iii), and (iv) |
| Answer» C. (ii), (iii), and (iv) | |
| 158. |
The method that returns the selected item from a List component is |
| A. | getSelected() |
| B. | getSelectedString() |
| C. | getSelectedItem() |
| D. | getSelectedData() |
| Answer» D. getSelectedData() | |
| 159. |
What is the process of defining a method in terms of itself that is a method that calls itself? |
| A. | Polymorphism |
| B. | Abstraction |
| C. | Encapsulation |
| D. | Recursion |
| Answer» E. | |
| 160. |
When method defined in subclass which has same signature as a method in a super class,it is known as method |
| A. | Overloading |
| B. | Overriding |
| C. | Packing |
| D. | None of these |
| Answer» C. Packing | |
| 161. |
Minimum threads in a program are |
| A. | 1 |
| B. | 2 |
| C. | 5 |
| D. | Many |
| Answer» B. 2 | |
| 162. |
Through the design mode of a builder tool, we use ___ or ____ to customize the bean. |
| A. | Property sheet |
| B. | Bean customizer |
| C. | Either (a) or (c) |
| D. | None of the above |
| Answer» D. None of the above | |
| 163. |
Which of these methods can be used to write console output? |
| A. | printout() |
| B. | println() |
| C. | write() |
| D. | All of the mentioned |
| Answer» C. write() | |
| 164. |
Which of these methods are used to register a MouseMotionListener? |
| A. | addMouse() |
| B. | addMouseListener() |
| C. | addMouseMotionListner() |
| D. | eventMouseMotionListener() |
| Answer» D. eventMouseMotionListener() | |
| 165. |
Java supports input/output of data through the classes included in the _______ package:a)jav |
| A. | oi |
| B. | java.out |
| C. | java.in |
| D. | java.io |
| Answer» E. | |
| 166. |
Which of this package contains classes and interfaces for networking? |
| A. | java.io |
| B. | java.util |
| C. | java.net |
| D. | java.network |
| Answer» D. java.network | |
| 167. |
What happens in a method if there is an exception thrown in a try block but there is no catch block following the try block? |
| A. | The program ignores the exception. |
| B. | The program will not compile without a complete try/catch structure. |
| C. | The program terminates immediately. |
| D. | The program throws an exception and proceeds to execute the finally block. |
| Answer» E. | |
| 168. |
The method setFont() is defined in---------- class |
| A. | Applet |
| B. | Font |
| C. | Container |
| D. | Component |
| Answer» E. | |
| 169. |
Which of these classes is used to read characters and strings in Java from console? |
| A. | BufferedReader |
| B. | StringReader |
| C. | BufferedStreamReader |
| D. | InputStreamReader |
| Answer» E. | |
| 170. |
Which of these method waits for the thread to treminate? |
| A. | sleep() |
| B. | isAlive() |
| C. | join() |
| D. | stop() |
| Answer» D. stop() | |
| 171. |
JRE stands for |
| A. | Java Realtime Environment |
| B. | Java Rapid Enterprise |
| C. | Java Runtime Environment |
| D. | None of the above |
| Answer» D. None of the above | |
| 172. |
How many finally blocks can there be in a try/catch structure? |
| A. | There must be 1. |
| B. | There can be 1 following each catch block. |
| C. | There can be 0 or 1 following the last catch block. |
| D. | There is no limit to the number of finally blocks following the last catch block. |
| Answer» D. There is no limit to the number of finally blocks following the last catch block. | |
| 173. |
The class used to create a Radio button in awt is |
| A. | Checkbox |
| B. | RadioButton |
| C. | OptionButton |
| D. | CheckboxGroup |
| Answer» E. | |
| 174. |
The following specifies the advantages of It is lightweight. It supports pluggable look and feel. It follows MVC (Model View Controller) architecture. |
| A. | Swing |
| B. | AWT |
| C. | Both A & B |
| D. | None of the above |
| Answer» B. AWT | |
| 175. |
Which of these events will be generated if we close a Frame window? |
| A. | ActionEvent |
| B. | ComponentEvent |
| C. | AdjustmentEvent |
| D. | WindowEvent |
| Answer» E. | |
| 176. |
Which of the following will cause a semantic error, if you are trying to compare x to 5? |
| A. | if (x == 5) |
| B. | if (x = 5) |
| C. | if (x <= 5) |
| D. | if (x >= 5) |
| Answer» C. if (x <= 5) | |
| 177. |
What is stored in the object obj in following lines of code? box obj; |
| A. | Memory address of allocated memory of object. |
| Answer» C. | |
| 178. |
What is the error in this code? byte b = 50; b = b * 50; |
| A. | b can not store the result 2500, limited by its range. |
| B. | * operator has converted b * 50 into int, which can not be converted to byte without casting. |
| C. | b can not contain value 50. |
| D. | No error in this code |
| Answer» C. b can not contain value 50. | |
| 179. |
Under what circumstances might you use the yield method of the Thread class |
| A. | To call from the currently running thread to allow another thread of the same or higher priority to run |
| B. | To call on a waiting thread to allow it to run |
| C. | To allow a thread of higher priority to run |
| D. | To call from the currently running thread with a parameter designating which thread should be allowed to run |
| Answer» B. To call on a waiting thread to allow it to run | |
| 180. |
Which class cannot be a subclass in java |
| A. | Abstract class |
| B. | Parent class |
| C. | Final class |
| D. | None of above |
| Answer» D. None of above | |
| 181. |
How do you position a component using FlowLayout? |
| A. | North, South, East, West |
| B. | Assign a row/column grid reference |
| C. | Pass a X/Y percentage parameter to the add method |
| D. | Do nothing, the FlowLayout will position the component |
| Answer» E. | |
| 182. |
Which of these packages contains all the classes and methods required for event handling in Java?a) jav |
| A. | applet |
| B. | java.awt |
| C. | java.event |
| D. | java.awt.event |
| Answer» E. | |
| 183. |
Which of the following methods can be used to draw the outline of a square within a JAVA.awt.Component object? |
| A. | drawLine() |
| B. | fillRect() |
| C. | drawPolygon() |
| D. | drawPolygon() |
| Answer» B. fillRect() | |
| 184. |
The layout manager that lets you align components at north, south, east, west directions is |
| A. | BorderLayout |
| B. | GridLayout |
| C. | FlowLayout |
| D. | GridBagLayout |
| Answer» B. GridLayout | |
| 185. |
Thread class is available in |
| A. | java.io package |
| B. | java.lang package |
| C. | java.awt package |
| D. | java.util package |
| Answer» C. java.awt package | |
| 186. |
Which class cannot have a subclass in java |
| A. | abstract class |
| B. | parent class |
| C. | final class |
| D. | None of above |
| Answer» D. None of above | |
| 187. |
Which of these exceptions will occur if we try to access the index of an array beyond itslength? |
| A. | ArithmeticException |
| B. | ArrayException |
| C. | ArrayIndexException |
| D. | ArrayIndexOutOfBoundsException |
| Answer» E. | |
| 188. |
The default layout manager of an Applet is |
| A. | Flowlayout |
| B. | Gridlayout |
| C. | BorderLayout |
| D. | BoxLayout |
| Answer» B. Gridlayout | |
| 189. |
Which of this method of Thread class is used to change the state of a thread to blocked state? |
| A. | sleep() |
| B. | terminate() |
| C. | stop() |
| D. | block() |
| Answer» B. terminate() | |
| 190. |
An abstract method ____. |
| A. | is any method in the abstract class |
| B. | cannot be inherited |
| C. | has no body |
| D. | is found in a subclass and overrides methods in a super-class using the reserved word abstract |
| Answer» D. is found in a subclass and overrides methods in a super-class using the reserved word abstract | |
| 191. |
In RMI program the following two steps are used to, Either extend the UnicastRemoteObject class, the exportObject() method of the UnicastRemoteObject class, |
| A. | Provide the Implementation of the remote interface |
| B. | Create the remote interface |
| C. | Create and start the remote application |
| D. | Compile the implementation class and create the stub and skeleton objects using the rmic tool |
| Answer» B. Create the remote interface | |
| 192. |
A primitive data type can be passed as an argument into a method |
| A. | By value |
| B. | by reference |
| C. | both a & b |
| D. | none of these |
| Answer» B. by reference | |
| 193. |
A ------------- is a component that can hold other components. |
| A. | A window |
| B. | a container |
| C. | A control |
| D. | a form |
| Answer» C. A control | |
| 194. |
Which component method is used to access a component's immediate container? |
| A. | getVisible() |
| B. | getImmediate() |
| C. | getParent() |
| D. | getContainer() |
| Answer» D. getContainer() | |
| 195. |
The AWT component used to display a single line of read-only text |
| A. | A checkbox |
| B. | A Label |
| C. | A button |
| D. | A TextField |
| Answer» C. A button | |
| 196. |
Each remote object has a unique name identified by an URL with the protocol rmi as follows: |
| A. | http://host:port/name |
| B. | //host:port/name |
| C. | http://host/name |
| D. | rmi://host:port/name |
| Answer» C. http://host/name | |
| 197. |
Which of the following statements is false as far as different type of statements is concern in JDBC? |
| A. | Regular Statement |
| B. | Prepared Statement |
| C. | Callable Statement |
| D. | Interim Statement |
| Answer» E. | |
| 198. |
Swing is a ___________ framework |
| A. | connection-based |
| B. | component-based |
| C. | platform-based |
| D. | None of the above |
| Answer» C. platform-based | |
| 199. |
Variables declared with in a class are called |
| A. | Identifier |
| B. | local variable |
| C. | instance variable |
| D. | global variable |
| Answer» D. global variable | |
| 200. |
Which package consist an applet class?a) jav |
| A. | applet |
| B. | java.awt |
| C. | java.awt.applet |
| D. | java.event |
| Answer» B. java.awt | |