McqMate
| 301. |
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» A. Swing | |
| 302. |
Swing is not a part of JFC (Java Foundation Classes) that is used to create GUI application? |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» B. False | |
| 303. |
These two ways are used to create a Frame By creating the object of Frame class (association) By extending Frame class (inheritance) |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» B. False | |
| 304. |
Which package provides many event classes and Listener interfaces for event handling? |
| A. | java.awt |
| B. | java.awt.Graphics |
| C. | java.awt.event |
| D. | None of the above |
| Answer» C. java.awt.event | |
| 305. |
The ActionListener interface is used for handling action events,For example,it's used by a |
| A. | JButton |
| B. | JCheckbox |
| C. | JMenuItem |
| D. | All of these |
| Answer» D. All of these | |
| 306. |
Which is the container that doesn't contain title bar and MenuBars. It can have other components like button, textfield etc? |
| A. | Window |
| B. | Frame |
| C. | Panel |
| D. | Container |
| Answer» C. Panel | |
| 307. |
Which of these package is used for all the text related modifications? |
| A. | java.text |
| B. | java.awt |
| C. | java.lang.text |
| D. | java.text.mofify |
| Answer» C. java.lang.text | |
| 308. |
RMI has which of these protocols implementations? |
| A. | Java Remote Method Protocol (JRMP) |
| B. | Internet Inter-ORB Protocol (IIOP) |
| C. | Jinni Extensible Remote Invocation (JERI) |
| D. | All mentioned above |
| Answer» D. All mentioned above | |
| 309. |
In RMI which layer defines and supports the invocation semantics of the RMI connection, this layer maintains the session during the method call? |
| A. | The Stub & Skeleton Layer |
| B. | The Application Layer |
| C. | The Remote Reference Layer |
| D. | The Transport Layer |
| Answer» C. The Remote Reference Layer | |
| 310. |
Which method of the Naming class (found in java.rmi) is used to update the RMI registry on the server machine? |
| A. | rebind () |
| B. | lookup() |
| C. | Both A & B |
| D. | None of the above |
| Answer» A. rebind () | |
| 311. |
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» A. Provide the Implementation of the remote interface | |
| 312. |
Which is built on the top of socket programming? |
| A. | EJB |
| B. | RMI |
| C. | Both A & B |
| D. | None of the above |
| Answer» B. RMI | |
| 313. |
In RMI program the following example shows the, import java.rmi.*; public interface Adder extends Remote{ public int add(int x,int y)throws RemoteException; } |
| A. | Create and start the remote application |
| B. | Create and start the client application |
| C. | Create the remote interface |
| D. | Provide the implementation of the remote interface |
| Answer» C. Create the remote interface | |
| 314. |
In RMI applications which program obtains a remote reference to one or more remote objects on a server and then invokes methods on them? |
| A. | Server |
| B. | Client |
| C. | Both A & B |
| D. | None of the above |
| Answer» B. Client | |
| 315. |
Which is a one-way communication only between the client and the server and it is not a reliable and there is no confirmation regarding reaching the message to the destination? |
| A. | TCP/IP |
| B. | UDP |
| C. | Both A & B |
| D. | None of the above |
| Answer» B. UDP | |
| 316. |
In a RMI Client Program, what are the exceptions which might have to handled? |
| A. | RemoteException |
| B. | NotBoundException |
| C. | MalFormedURLException |
| D. | All mentioned above |
| Answer» D. All mentioned above | |
| 317. |
Abbreviate the term DGC? |
| A. | Digital Garbage Collection |
| B. | Distributed Garbage Collection |
| C. | Distributed Garbage Connection |
| D. | None of the above |
| Answer» B. Distributed Garbage Collection | |
| 318. |
Which of the following is a type of polymorphism in Java? |
| A. | Compile time polymorphism |
| B. | Execution time polymorphism |
| C. | Multiple polymorphism |
| D. | Multilevel polymorphism |
| Answer» A. Compile time polymorphism | |
| 319. |
When does method overloading is determined? |
| A. | At run time |
| B. | At compile time |
| C. | At coding time |
| D. | At execution time |
| Answer» B. At compile time | |
| 320. |
Which concept of Java is a way of converting real world objects in terms of class? |
| A. | Polymorphism |
| B. | Encapsulation |
| C. | Abstraction |
| D. | Inheritance |
| Answer» C. Abstraction | |
| 321. |
Which component is responsible to optimize bytecode to machine code? |
| A. | JVM |
| B. | JDK |
| C. | JIT |
| D. | JRE |
| Answer» C. JIT | |
| 322. |
How can we identify whether a compilation unit is class or interface from a .class file? |
| A. | Java source file header |
| B. | Extension of compilation unit |
| C. | We cannot differentiate between class and interface |
| D. | The class or interface name should be postfixed with unit type |
| Answer» A. Java source file header | |
| 323. |
Which of these packages contains abstract keyword? |
| A. | java.lang |
| B. | java.util |
| C. | java.io |
| D. | java.system |
| Answer» A. java.lang | |
| 324. |
Which of these class is used to create an object whose character sequence is mutable? |
| A. | String() |
| B. | StringBuffer() |
| C. | String() & StringBuffer() |
| D. | None of the mentioned |
| Answer» B. StringBuffer() | |
| 325. |
Which of these method of class StringBuffer is used to find the length of current character sequence? |
| A. | length() |
| B. | Length() |
| C. | capacity() |
| D. | Capacity() |
| Answer» A. length() | |
| 326. |
What is the string contained in s after following lines of code? StringBuffer s new StringBuffer("Hello"); s.deleteCharAt(0); |
| A. | Hell |
| B. | ello |
| C. | Hel |
| D. | llo |
| Answer» B. ello | |
| 327. |
Which of these method(s) is/are used for writing bytes to an outputstream? |
| A. | put() |
| B. | print() and write() |
| C. | printf() |
| D. | write() and read() |
| Answer» B. print() and write() | |
| 328. |
Which keyword is used by the method to refer to the object that invoked it? |
| A. | import |
| B. | catch |
| C. | abstract |
| D. | this |
| Answer» D. this | |
| 329. |
What is the return type of a method that does not return any value? |
| A. | int |
| B. | float |
| C. | void |
| D. | double |
| Answer» C. void | |
| 330. |
Which of these selection statements test only for equality? |
| A. | if |
| B. | switch |
| C. | if & switch |
| D. | none of the mentioned |
| Answer» B. switch | |
| 331. |
Which of these jump statements can skip processing the remainder of the code in its body for a particular iteration? |
| A. | break |
| B. | return |
| C. | exit |
| D. | continue |
| Answer» D. continue | |
| 332. |
Which of these is the method which is executed first before execution of any other thing takes place in a program? |
| A. | main method |
| B. | finalize method |
| C. | static method |
| D. | private method |
| Answer» C. static method | |
| 333. |
Which of these data type can be used for a method having a return statement in it? |
| A. | void |
| B. | int |
| C. | float |
| D. | both int and float |
| Answer» D. both int and float | |
| 334. |
If an expression contains double, int, float, long, then the whole expression will be promoted into which of these data types? |
| A. | long |
| B. | int |
| C. | double |
| D. | float |
| Answer» C. double | |
| 335. |
Which of the below is invalid identifier with the main method? |
| A. | public |
| B. | static |
| C. | private |
| D. | final |
| Answer» C. private | |
| 336. |
Which of these can not be used for a variable name in Java? |
| A. | identifier |
| B. | keyword |
| C. | identifier & keyword |
| D. | none of the mentioned |
| Answer» B. keyword | |
| 337. |
which of the following can be operands of arithmetic operators? |
| A. | Numeric |
| B. | Boolean |
| C. | Characters |
| D. | Both Numeric & Characters |
| Answer» D. Both Numeric & Characters | |
| 338. |
How to copy contents of array? |
| A. | System.arrayCopy() |
| B. | Array.copy() |
| C. | Arrays.copy() |
| D. | Collection.copy() |
| Answer» A. System.arrayCopy() | |
| 339. |
Which of these are selection statements in Java? |
| A. | if() |
| B. | for() |
| C. | continue |
| D. | break |
| Answer» A. if() | |
| 340. |
Which of these operators is used to allocate memory for an object? |
| A. | malloc |
| B. | alloc |
| C. | new |
| D. | give |
| Answer» C. new | |
| 341. |
Which of these packages contains the exception Stack Overflow in Java? |
| A. | java.lang |
| B. | java.util |
| C. | java.io |
| D. | java.system |
| Answer» A. java.lang | |
| 342. |
Which of this method of class String is used to obtain a length of String object? |
| A. | get() |
| B. | Sizeof() |
| C. | lengthof() |
| D. | length() |
| Answer» D. length() | |
| 343. |
Which of these methods of a Thread class is used to suspend a thread for a period of time? |
| A. | sleep() |
| B. | terminate() |
| C. | suspend() |
| D. | stop() |
| Answer» A. sleep() | |
| 344. |
Which of these exceptions will be thrown if we use null reference for an arithmetic operation? |
| A. | ArithmeticException |
| B. | NullPointerException |
| C. | IllegalAccessException |
| D. | IllegalOperationException |
| Answer» B. NullPointerException | |
| 345. |
Which of the interface contains all the methods used for handling thread related operations in Java? |
| A. | Runnable interface |
| B. | Math interface |
| C. | System interface |
| D. | ThreadHandling interface |
| Answer» A. Runnable interface | |
| 346. |
Which of these class is used to read and write bytes in a file? |
| A. | FileReader |
| B. | FileWriter |
| C. | FileInputStream |
| D. | InputStreamReader |
| Answer» C. FileInputStream | |
| 347. |
Which of these classes is used for input and output operation when working with bytes? |
| A. | InputStream |
| B. | Reader |
| C. | Writer |
| D. | All of the mentioned |
| Answer» A. InputStream | |
| 348. |
Which of these class is a superclass of all other classes? |
| A. | Math |
| B. | Process |
| C. | System |
| D. | Object |
| Answer» D. Object | |
| 349. |
Which of these class is not a member class of java.io package? |
| A. | String |
| B. | StringReader |
| C. | Writer |
| D. | File |
| Answer» A. String | |
| 350. |
Which of these class is not related to input and output stream in terms of functioning? |
| A. | File |
| B. | Writer |
| C. | InputStream |
| D. | Reader |
| Answer» A. File | |
| 351. |
Standard output variable ‘out’ is defined in which class? |
| A. | Void |
| B. | Process |
| C. | Runtime |
| D. | System |
| Answer» D. System | |
| 352. |
Which of these packages contains all the event handling interfaces? |
| A. | java.lang |
| B. | java.awt |
| C. | java.awt.event |
| D. | java.event |
| Answer» C. java.awt.event | |
| 353. |
Which of these keywords is not a part of exception handling? |
| A. | try |
| B. | finally |
| C. | thrown |
| D. | catch |
| Answer» C. thrown | |
| 354. |
Which of these exceptions handles the divide by zero error? |
| A. | ArithmeticException |
| B. | MathException |
| C. | IllegalAccessException |
| D. | IllegarException |
| Answer» A. ArithmeticException | |
| 355. |
Which of these exceptions will occur if we try to access the index of an array beyond its length? |
| A. | ArithmeticException |
| B. | ArrayException |
| C. | ArrayIndexException |
| D. | ArrayIndexOutOfBoundsException |
| Answer» D. ArrayIndexOutOfBoundsException | |
| 356. |
What decides thread priority? |
| A. | Process |
| B. | Process scheduler |
| C. | Thread |
| D. | Thread scheduler |
| Answer» D. Thread scheduler | |
| 357. |
Which of the following will ensure the thread will be in running state? |
| A. | yield() |
| B. | notify() |
| C. | wait() |
| D. | Thread.killThread() |
| Answer» C. wait() | |
| 358. |
Which of these is used to read a string from the input stream? |
| A. | get() |
| B. | getLine() |
| C. | read() |
| D. | readLine() |
| Answer» C. read() | |
| 359. |
Which of these methods can be used to output a string in an applet? |
| A. | display() |
| B. | print() |
| C. | drawString() |
| D. | tr |
| Answer» A. display() | |
| 360. |
Which of these methods is a part of Abstract Window Toolkit (AWT) ? |
| A. | display() |
| B. | paint() |
| C. | drawString() |
| D. | tr |
| Answer» A. display() | |
| 361. |
Which of these operators can be used to get run time information about an object? |
| A. | getInfo |
| B. | Info |
| C. | instanceof |
| D. | getinfoof |
| Answer» C. instanceof | |
| 362. |
Which of these methods can be used to writing console output? |
| A. | print() |
| B. | println() |
| C. | write() |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 363. |
Which of these class is used to read from a file? |
| A. | InputStream |
| B. | BufferedInputStream |
| C. | FileInputStream |
| D. | BufferedFileInputStream |
| Answer» C. FileInputStream | |
| 364. |
Which of these events is generated by scroll bar? |
| A. | ActionEvent |
| B. | KeyEvent |
| C. | WindowEvent |
| D. | AdjustmentEvent |
| Answer» D. AdjustmentEvent | |
| 365. |
Which of these methods can be used to obtain the command name for invoking ActionEvent object? |
| A. | getCommand() |
| B. | getActionCommand() |
| C. | getActionEvent() |
| D. | getActionEventCommand() |
| Answer» B. getActionCommand() | |
| 366. |
Which of the following is not a primitive data types? |
| A. | Byte. |
| B. | String. |
| C. | Integer. |
| D. | Float. |
| Answer» B. String. | |
| 367. |
What is the range of the char type? |
| A. | 0 to 216. |
| B. | 0 to 215. |
| C. | 0 to 216-1. |
| D. | 0 to 215-1. |
| Answer» D. 0 to 215-1. | |
| 368. |
Literals in java must be preceded by which of these? |
| A. | L. |
| B. | l. |
| C. | D. |
| D. | both a & b. |
| Answer» D. both a & b. | |
| 369. |
Object is an _________ of a class. |
| A. | instance. |
| B. | implement. |
| C. | inheritance. |
| D. | invoke. |
| Answer» A. instance. | |
| 370. |
Class is a ______ entity. |
| A. | logical. |
| B. | physical. |
| C. | up normal. |
| D. | collection of. |
| Answer» A. logical. | |
| 371. |
Object is a _______ entity. |
| A. | normal. |
| B. | physical. |
| C. | logical. |
| D. | normal. |
| Answer» B. physical. | |
| 372. |
______ can appear anywhere in the body of a java method. |
| A. | definition. |
| B. | declaration. |
| C. | determine. |
| D. | package. |
| Answer» B. declaration. | |
| 373. |
______ must be the first non comment statement in the file. |
| A. | package. |
| B. | class. |
| C. | object. |
| D. | declaration. |
| Answer» A. package. | |
| 374. |
_______ is passed to a method by use of call-by-reference. |
| A. | variables. |
| B. | objects. |
| C. | methods. |
| D. | operators. |
| Answer» B. objects. | |
| 375. |
Every method of a ________ is implicitly final. |
| A. | static class. |
| B. | dynamic class. |
| C. | final class. |
| D. | abstract class. |
| Answer» C. final class. | |
| 376. |
A _______ object cannot be modified after it is created. |
| A. | double. |
| B. | int. |
| C. | string. |
| D. | main. |
| Answer» C. string. | |
| 377. |
A ____ class may not have any abstract method. |
| A. | abstract. |
| B. | static. |
| C. | final. |
| D. | public. |
| Answer» C. final. | |
| 378. |
What will be the result of the expression 13 & 25? |
| A. | 38. |
| B. | 25. |
| C. | 9. |
| D. | 12. |
| Answer» C. 9. | |
| 379. |
What will be result of expression 9 | 9? |
| A. | 1. |
| B. | 18. |
| C. | 9. |
| D. | 12. |
| Answer» C. 9. | |
| 380. |
_________ Operators are overloaded for string objects? |
| A. | -, +. |
| B. | +, =. |
| C. | <<, >>. |
| D. | ++, --. |
| Answer» B. +, =. | |
| 381. |
If an expression contains double, int, float, long, then whole expression will promoted into which of these data types?. |
| A. | .long |
| B. | int. |
| C. | double. |
| D. | float. |
| Answer» C. double. | |
| 382. |
________ is valid for if statement? |
| A. | An integer expression. |
| B. | A Boolean expression. |
| C. | A character expression. |
| D. | A legal expression. |
| Answer» B. A Boolean expression. | |
| 383. |
A package is a collection of ______. |
| A. | keywords. |
| B. | classes and interfaces. |
| C. | editing tools. |
| D. | views. |
| Answer» B. classes and interfaces. | |
| 384. |
________ statement is valid for array declaration. |
| A. | int number ();. |
| B. | float number ();. |
| C. | float number [];. |
| D. | count Int [];. |
| Answer» C. float number [];. | |
| 385. |
What is the output of relational operators?. |
| A. | integer. |
| B. | boolean. |
| C. | character. |
| D. | double. |
| Answer» B. boolean. | |
| 386. |
Which of these operators can skip evaluating right hand operand?. |
| A. | !. |
| B. | |. |
| C. | &. |
| D. | &&. |
| Answer» D. &&. | |
| 387. |
Which exception is thrown by the read () method of Input Stream class? |
| A. | Exception. |
| B. | ClassNotFoundException. |
| C. | read Exception. |
| D. | IOException. |
| Answer» D. IOException. | |
| 388. |
Which of the following denotes a javadoc comment? |
| A. | //#. |
| B. | /*. |
| C. | /**. |
| D. | //**. |
| Answer» C. /**. | |
| 389. |
Using the keyword interface you can fully abstract a _________. |
| A. | method. |
| B. | keyword |
| C. | class. |
| D. | variables. |
| Answer» C. class. | |
| 390. |
One interface can inherit another by use of the keyword _____. |
| A. | public. |
| B. | extends. |
| C. | method name. |
| D. | class name. |
| Answer» B. extends. | |
| 391. |
An exception is an __________ condition that arises in a code. |
| A. | abnormal. |
| B. | casual. |
| C. | unfortunate. |
| D. | opposite. |
| Answer» A. abnormal. | |
| 392. |
______ is at the top of the exception class hierarchy. |
| A. | try. |
| B. | throwable. |
| C. | exception class. |
| D. | catch. |
| Answer» B. throwable. | |
| 393. |
In java thread to thread communication is called _____. |
| A. | passing. |
| B. | sending. |
| C. | messaging. |
| D. | calling. |
| Answer» C. messaging. | |
| 394. |
Which of these access specifiers can be used for an interface?. |
| A. | public. |
| B. | protected. |
| C. | private. |
| D. | All of the mentioned. |
| Answer» A. public. | |
| 395. |
Java programs perform I/O through _______. |
| A. | i/o methods. |
| B. | i/o package. |
| C. | streams. |
| D. | compiler. |
| Answer» C. streams. | |
| 396. |
In java a _______ is a sequence of characters. |
| A. | string. |
| B. | arrayChar. |
| C. | groupChar. |
| D. | collection. |
| Answer» A. string. | |
| 397. |
The String is defined in _______ namespace. |
| A. | java.Lang. |
| B. | java.String. |
| C. | java.Char. |
| D. | java.Awt. |
| Answer» A. java.Lang. | |
| 398. |
__________ is a special member function. |
| A. | method. |
| B. | class. |
| C. | use defined function. |
| D. | constructor. |
| Answer» D. constructor. | |
| 399. |
Keyword _____ is always a reference to the object. |
| A. | new. |
| B. | this. |
| C. | invoke. |
| D. | class. |
| Answer» B. this. | |
| 400. |
________ is the mechanism that binds together the code and the data. |
| A. | polymorphism. |
| B. | encapsulation. |
| C. | inheritance. |
| D. | together. |
| Answer» B. encapsulation. | |
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