765 + Mcqs in Java MCQ Questions for Placement Page 13 McqOptions

601.	What type of constructor is used to provide different values to the distinct objects?
A.	Default constructor
B.	Parameterized constructor
C.	Overloading constructor
D.	None of the above
Answer» C. Overloading constructor

Discussion

602.	What package is a part of the wrapper class which is imported by default into all Java programs?
A.	java.lang
B.	java.awt
C.	java.io
D.	java.util
Answer» B. java.awt

Discussion

603.	What method Returns an enumeration of the keys which includes those keys found in the default property list?
A.	Enumeration keys()
B.	Enumeration elements()
C.	Enumeration propertyNames()
D.	Both A & B
Answer» D. Both A & B

Discussion

604.	What is XML used to simplify?
A.	Data storage
B.	Data sharing
C.	Both A & B
D.	None of the above
Answer» D. None of the above

Discussion

605.	What is used to run an Applet?
A.	An html file
B.	An AppletViewer tool(for testing purpose)
C.	Both A & B
D.	None of the above
Answer» D. None of the above

Discussion

606.	What is used to display the intermediate result in an interceptor?
A.	Params Interceptor
B.	Custom Interceptor
C.	ExecAndWait Interceptor
D.	Prepare Interceptor
Answer» D. Prepare Interceptor

Discussion

607.	What is used to convert the byte-oriented stream into character-oriented stream?
A.	Console
B.	Scanner
C.	InputStreamReader
D.	DataInputStream
Answer» D. DataInputStream

Discussion

608.	What is the reason that a java program cannot directly communicate with an ODBC driver?
A.	ODBC written in C# language
B.	ODBC written in C language
C.	ODBC written in C++ languageNone of the above
D.	None of the above
Answer» C. ODBC written in C++ languageNone of the above

Discussion

609.	What is the range of the int data type?
A.	–2,147,483,648 to 2,147,483,647
B.	-2,147,483,647 to 2,147,483,648
C.	-32,768 to 32,767
D.	-32,767 to 32,768
Answer» B. -2,147,483,647 to 2,147,483,648

Discussion

610.	What is the disadvantage of Garbage Collection?
A.	It makes java memory efficient because garbage collector removes the unreferenced objects from heap memory
B.	It is automatically done by the garbage collector so we don't need to make extra efforts
C.	None of the above
D.	Both A & B
Answer» D. Both A & B

Discussion

611.	What is the advantage of Method Overloading?
A.	Method overloading increases the readability of the program
B.	Method overloading does not increases the readability of the program
C.	Method overloading does not increases the reliability of the program
D.	None of the above
Answer» B. Method overloading does not increases the readability of the program

Discussion

612.	What is responsible in MVC for managing the data of the application which responds to the request from the view as well as to the instructions from the controller to update itself?
A.	View
B.	Model
C.	Controller
D.	None of the above
Answer» C. Controller

Discussion

613.	What is meant by JIT?
A.	Java In Time
B.	Just In Time
C.	Join In Time
D.	None of the above
Answer» C. Join In Time

Discussion

614.	What is known as the classes that extend Throwable class except RuntimeException and Error?
A.	Checked Exception
B.	Unchecked Exception
C.	Error
D.	None of the above
Answer» B. Unchecked Exception

Discussion

615.	What invokes immediately after the start() method and also any time the applet needs to repaint itself in the browser?
A.	stop()
B.	init()
C.	paint()
D.	destroy()
Answer» D. destroy()

Discussion

616.	What does the Session object hold?
A.	First Level Cache
B.	Second Level Cache
C.	Both A & B
D.	None of the above
Answer» B. Second Level Cache

Discussion

617.	What defines the method by which you can enumerate (obtain one at a time) the elements in a collection of objects?
A.	Stack class
B.	Bitset class
C.	Enumeration interface
D.	None of the above
Answer» D. None of the above

Discussion

618.	What can be accessed or inherited without actual copy of code to each program?
A.	Browser
B.	Applet
C.	Package
D.	None of the above
Answer» D. None of the above

Discussion

619.	What are the main subclasses of the Exception class?
A.	IOException class
B.	RuntimeException Class
C.	ClassCastException
D.	Both A & B
Answer» E.

Discussion

620.	We need to write the controller code self, If we change the controller code, we need to recompile the class and redeploy the application this is a disadvantage of which MVC Architecture?
A.	MVC 1 Architecture
B.	MVC 2 Architecture
C.	All of the above
D.	None of the above
Answer» C. All of the above

Discussion

621.	We need to specify @Inheritance(strategy=InheritanceType.JOINED) in the parent class and @PrimaryKeyJoinColumn annotation in the subclasses.
A.	True
B.	False
Answer» B. False

Discussion

622.	Void is not a wrapper class
A.	True
B.	False
Answer» B. False

Discussion

623.	Using mail API we cannot send mail from a servlet.
A.	True
B.	False
Answer» C.

Discussion

624.	URL stands for Uniform Resource Locator and represents a resource on the World Wide Web, such as a Web page or FTP directory.
A.	True
B.	False
Answer» B. False

Discussion

625.	URL is an acronym for?
A.	Uniform Resource Locator
B.	Unified Resource Locator
C.	Uniform Restore Locator
D.	Unified Restore Locator
Answer» B. Unified Resource Locator

Discussion

626.	Under which package is the string class encapsulated?
A.	java.lang
B.	java.util
C.	java.io
D.	java.awt
Answer» B. java.util

Discussion

627.	Unchecked exceptions are checked at compile-time rather they are checked at runtime.
A.	True
B.	False
Answer» C.

Discussion

628.	Thread class constructor allocates a new thread object
A.	True
B.	False
Answer» B. False

Discussion

629.	These two ways are used to create a Frame (1) By creating the object of Frame class (association) (2) By extending Frame class (inheritance)
A.	True
B.	False
Answer» B. False

Discussion

630.	The wrapper classes are part of the which package, that is imported by default into all Java programs?
A.	java.lang
B.	java.awt
C.	java.io
D.	java.util
Answer» B. java.awt

Discussion

631.	The workflow interceptor is used to get information about the error messages defined in the action class.
A.	True
B.	False
Answer» B. False

Discussion

632.	The values configured in struts.properties file will override the default values configured in default.properties which is contained in the struts2-core-x.y.z.jar distribution.
A.	True
B.	False
Answer» B. False

Discussion

633.	The URLConnection class can be used to read and write data to the specified resource referred by the URL
A.	True
B.	False
Answer» B. False

Discussion

634.	The struts 2 framework is used to develop MVC-based web application
A.	True
B.	False
Answer» B. False

Discussion

635.	The sendRedirect() method of HttpServletResponse interface can be used to redirect response to another resource, it may be servlet, jsp or html file.
A.	True
B.	False
Answer» B. False

Discussion

636.	The ResultSet.next method is used to move to the next row of the ResultSet, making it the current row.
A.	True
B.	False
Answer» B. False

Discussion

637.	The PipedInputStream and PipedOutputStream classes can be used to read and write data simultaneously.
A.	True
B.	False
Answer» B. False

Discussion

638.	The performance of the application will be faster if you use PreparedStatement interface because query is compiled only once.
A.	True
B.	False
Answer» B. False

Discussion

639.	The object cloning is a way to create exact copy of an object
A.	True
B.	False
Answer» B. False

Discussion

640.	The Object class is not a parent class of all the classes in java by default.
A.	True
B.	False
Answer» C.

Discussion

641.	The life cycle of the thread is controlled by ?
A.	JVM
B.	JDK
C.	JRE
D.	None of the above
Answer» B. JDK

Discussion

642.	The JDK forms an extended subset of a software development kit (SDK)
A.	True
B.	False
Answer» B. False

Discussion

643.	The JDBC API has always supported persistent storage of objects defined in the Java programming language through the methods getObject and setObject.
A.	True
B.	False
Answer» B. False

Discussion

644.	The Java Virtual Machine is the cornerstone of the Java platform.
A.	True
B.	False
Answer» B. False

Discussion

645.	The Java Foundation Classes (JFC) is a set of GUI components which simplify the development of desktop applications.
A.	True
B.	False
Answer» B. False

Discussion

646.	The intent is for JDBC drivers to implement nonscrollable result sets using the support provided by the underlying database systems.
A.	True
B.	False
Answer» C.

Discussion

647.	The i18n interceptor provides multi-lingual support for your application
A.	True
B.	False
Answer» B. False

Discussion

648.	The getElementsByTagName() method is used to retrieve data from an XML document.
A.	True
B.	False
Answer» B. False

Discussion

649.	The following two rules are defined by? 1. The parameters may differ in their type or number, or in both. 2. They may have the same or different return types.
A.	Method overloading
B.	Method overriding
C.	Constructor overloading
D.	None of the above
Answer» B. Method overriding

Discussion

650.	The Following steps are required to perform (1) Implement the Listener interface and overrides its methods (2) Register the component with the Listener
A.	Exception Handling
B.	String Handling
C.	Event Handling
D.	None of the above
Answer» D. None of the above

Discussion

Explore topic-wise MCQs in Placement Tests.

What type of constructor is used to provide different values to the distinct objects?

What package is a part of the wrapper class which is imported by default into all Java programs?

What method Returns an enumeration of the keys which includes those keys found in the default property list?

What is XML used to simplify?

What is used to run an Applet?

What is used to display the intermediate result in an interceptor?

What is used to convert the byte-oriented stream into character-oriented stream?

What is the reason that a java program cannot directly communicate with an ODBC driver?

What is the range of the int data type?

What is the disadvantage of Garbage Collection?

What is the advantage of Method Overloading?

What is responsible in MVC for managing the data of the application which responds to the request from the view as well as to the instructions from the controller to update itself?

What is meant by JIT?

What is known as the classes that extend Throwable class except RuntimeException and Error?

What invokes immediately after the start() method and also any time the applet needs to repaint itself in the browser?

What does the Session object hold?

What defines the method by which you can enumerate (obtain one at a time) the elements in a collection of objects?

What can be accessed or inherited without actual copy of code to each program?

What are the main subclasses of the Exception class?

We need to write the controller code self, If we change the controller code, we need to recompile the class and redeploy the application this is a disadvantage of which MVC Architecture?

We need to specify @Inheritance(strategy=InheritanceType.JOINED) in the parent class and @PrimaryKeyJoinColumn annotation in the subclasses.

Void is not a wrapper class

Using mail API we cannot send mail from a servlet.

URL stands for Uniform Resource Locator and represents a resource on the World Wide Web, such as a Web page or FTP directory.

URL is an acronym for?

Under which package is the string class encapsulated?

Unchecked exceptions are checked at compile-time rather they are checked at runtime.

Thread class constructor allocates a new thread object

These two ways are used to create a Frame (1) By creating the object of Frame class (association) (2) By extending Frame class (inheritance)

The wrapper classes are part of the which package, that is imported by default into all Java programs?

The workflow interceptor is used to get information about the error messages defined in the action class.

The values configured in struts.properties file will override the default values configured in default.properties which is contained in the struts2-core-x.y.z.jar distribution.

The URLConnection class can be used to read and write data to the specified resource referred by the URL

The struts 2 framework is used to develop MVC-based web application

The sendRedirect() method of HttpServletResponse interface can be used to redirect response to another resource, it may be servlet, jsp or html file.

The ResultSet.next method is used to move to the next row of the ResultSet, making it the current row.

The PipedInputStream and PipedOutputStream classes can be used to read and write data simultaneously.

The performance of the application will be faster if you use PreparedStatement interface because query is compiled only once.

The object cloning is a way to create exact copy of an object

The Object class is not a parent class of all the classes in java by default.

The life cycle of the thread is controlled by ?

The JDK forms an extended subset of a software development kit (SDK)

The JDBC API has always supported persistent storage of objects defined in the Java programming language through the methods getObject and setObject.

The Java Virtual Machine is the cornerstone of the Java platform.

The Java Foundation Classes (JFC) is a set of GUI components which simplify the development of desktop applications.

The intent is for JDBC drivers to implement nonscrollable result sets using the support provided by the underlying database systems.

The i18n interceptor provides multi-lingual support for your application

The getElementsByTagName() method is used to retrieve data from an XML document.

The following two rules are defined by? 1. The parameters may differ in their type or number, or in both. 2. They may have the same or different return types.

The Following steps are required to perform (1) Implement the Listener interface and overrides its methods (2) Register the component with the Listener