Java Programming - 25

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

 

Multiple Choice Multiple Answer

Question Which are the two threads of java?

Correct Answer mainthread( ) , childthread( )

Your Answer mainthread( ) , childthread( )

 

Multiple Choice Single Answer

Question How can class be imported from a package to a program?

Correct Answer import java.packagename.classname

Your Answer import java.package.class

 

Multiple Choice Single Answer

Question Which keyword is used to create an instance of a class?

Correct Answer new

Your Answer new

 

Multiple Choice Single Answer

Question Multiple Choice Single Response

Correct Answer Object oriented programming.

Your Answer Object oriented programming.

 

Multiple Choice Single Answer

Question Which is the default access modifier for an interface method?

Correct Answer public

Your Answer public

 

Multiple Choice Single Answer

Question How multidimensional array is declared?

Correct Answer int[4] [5];

Your Answer int[4] [5];

 

Multiple Choice Multiple Answer

Question What returns a reference to the thread in which it is called?

Correct Answer Method , Class , Object

Your Answer Method , Class , Object

 

True/False

Question Casting occurs commonly between numeric types

Correct Answer True

Your Answer True

 

Select The Blank

Question Start( )executes a call to ________.

Correct Answer run( )

Your Answer run( )

 

True/False

Question Running threads can be suspended, which temporarily suspends its activity.

Correct Answer True

Your Answer True

 

Select The Blank

Question A ________ is a subclass of itself.

Correct Answer Class

Your Answer Class

 

Multiple Choice Single Answer

Question How many concrete classes can you have inside an interface?

Correct Answer none

Your Answer none

 

Multiple Choice Single Answer

Question Java Applets are intelligent programs means :-

Correct Answer They can react to user input and dynamically change.

Your Answer They can react to user input and dynamically change.

 

Multiple Choice Single Answer

Question Which of the following can be referenced by 'this' variable?

Correct Answer The instance variables and methods of a class

Your Answer The instance variables of a class only

 

True/False

Question A thread's priority is used to decide when to switch from one running thread to the

next, this is called as the context switch.

Correct Answer True

Your Answer True

 

True/False

Question Object oriented programming organizes a program around processes acting on data.

Correct Answer False

Your Answer False

 

Multiple Choice Multiple Answer

Question Which of these lines of code will compile?

Correct Answer short s = 20; , char c = 32; , double d = 1.4;

Your Answer short s = 20; , char c = 32; , double d = 1.4;

 

Select The Blank

Question ________ are stored in hierarchical manner.

Correct Answer Packages

Your Answer Packages

 

Multiple Choice Multiple Answer

Question What are different data types in java?

Correct Answer char , double , byte

Your Answer char , double , byte

 

Multiple Choice Single Answer

Question Select the facility provided along with JVM which enhances speed of execution :-

Correct Answer Just-In-Time (JIT) compiler.

Your Answer Just-In-Time (JIT) compiler.

 

Match The Following

Question Correct Answer Your Answer

The data, or variable, defined

within a class

Instance variable. Instance variable.

General form of Cast (target--type)value (target--type)value

Determine the relationship that

one operand has to the other

Relational Operator Relational Operator

The secondary versions of the

Boolean AND and OR operators

Short-Circuit Logical Operators Short-Circuit Logical Operators

 

Multiple Choice Multiple Answer

Question Modulus operator % can be applied to these data types :-

Correct Answer floating Point , Integer , Character

Your Answer floating Point , Integer , Character

 

Multiple Choice Multiple Answer

Question Expression must be of the data types :-

Correct Answer Byte , Short , Int

Your Answer Byte , Short , Int

 

Select The Blank

Question For externalizable objects the ________ is solely responsible for the external format

of its contents.

Correct Answer Class

Your Answer Class

 

Multiple Choice Single Answer

Question Using which keyword we can fully abstract a class?

Correct Answer interface

Your Answer interface

 

Select The Blank

Question The ________ repeat a set of code while the condition is false.

Correct Answer While loop

Your Answer While loop

 

Multiple Choice Multiple Answer

Question Which of the following are mathematical Expressions?

Correct Answer (+ +) , (+ =) , (- =)

Your Answer (+ +) , (+ =) , (- =)

 

Multiple Choice Single Answer

Question Which method is used to determine the class of an object?

Correct Answer getClass( ) method

Your Answer getClass( ) method

 

Select The Blank

Question The mechanism which binds together the code and data and keeps both safe is

________.

Correct Answer Encapsulation

Your Answer Encapsulation

 

True/False

Question Java compiler stores the .class files in the path specified in CLASSPATH

environmental variable.

Correct Answer False

Your Answer False

 

Multiple Choice Single Answer

Question Java was developed at :-

Correct Answer Sun Microsystems

Your Answer Sun Microsystems

 

Multiple Choice Single Answer

Question What are the kinds of variables in Java?

Correct Answer Instance, local, class variables

Your Answer Instance, local, class variables

 

True/False

Question If the break statement is omited in switch statement, then execution will continue on

into the next case.

Correct Answer True

Your Answer True

 

Multiple Choice Multiple Answer

Question Java defines two ways when instantiating an object, such as :-

Correct Answer Can implement the runnable interface , Can extend the thread class

Your Answer Can implement the runnable interface , Can extend the thread class

 

Multiple Choice Multiple Answer

Question The source for the frist package defines three classes

Correct Answer Protection , Derived , SamePackage

Your Answer Protection , Derived , SamePackage

 

Multiple Choice Multiple Answer

Question Exit statement is optional in which loops in java?

Correct Answer While , Do-while , For

Your Answer While , Do-while , For

 

Select The Blank

Question In ________ statement condition is true, then statement 1 is executed.

Correct Answer If

Your Answer If

 

Multiple Choice Single Answer

Question What are the possible access modifiers while implementing interface methods?

Correct Answer public

Your Answer public

 

Multiple Choice Multiple Answer

Question Which is a public static member of thread?

Correct Answer currenthread( ) , mainthread( )

Your Answer currenthread( ) , mainthread( )

 

Select The Blank

Question The ________ repeats a set of code at least once before the condition is tested.

Correct Answer Do-while loop

Your Answer Do-while loop

 

True/False

Question A thread can be blocked when waiting for a resource.

Correct Answer True

Your Answer True

 

Select The Blank

Question A ________can implement more than one interface.

Correct Answer Class

Your Answer Class

 

True/False

Question Boolean values can be cast into any other primitive type.

Correct Answer False

Your Answer False

 

True/False

Question Constructors can be overloaded like regular methods.

Correct Answer True

Your Answer True

 

Select The Blank

Question The name of the new thread is specified by ________.

Correct Answer threadName

Your Answer threadName

 

Multiple Choice Single Answer

Question A Java application can execute anywhere on the network, this implements that Java is :-

Correct Answer Architecture neutral

Your Answer Architecture neutral

 

Match The Following

Question Correct Answer Your Answer

It can have only one of two

possible values

Boolean type Boolean type

Float hightemp, lowtemp Float variable declarations Float variable declarations

Smallest int type Byte Byte

Floating point numbers are also

known as

Real Numbers Real Numbers

Read more »

Posted in: Java Programming (Set VIII)

JAVA Programming - 24

SCDL – 4th Semester – Java Programming

 

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

 

Multiple Choice Single Answer

Question What is meant by garbage collection?

Correct Answer Object is no longer referred to by any variable

Your Answer Object is no longer referred to by any variable

 

Multiple Choice Single Answer

Question How can class be imported from a package to a program?

Correct Answer import java.packagename.classname

Your Answer import java.packagename.classname

 

Select The Blank

Question The ________ is similar to break, except that instead of halting the execution of the loop, it

starts the next iteration.

Correct Answer Continue

Your Answer Continue

 

Multiple Choice Single Answer

Question Which Control Statements enable program execution to repeat one or more statements?

Correct Answer Iteration

Your Answer Iteration

 

Select The Blank

Question The ________ loop is java's most fundamental looping statement.

Correct Answer While

Your Answer For

 

Select The Blank

Question Java defines ________ Primitive type of data.

Correct Answer Eight 8 simple types of data: byte, short, int, long (INTEGERS), float, double(FLOATING

TYPE), char, and Boolean

Your Answer Eight

 

True/False

Question Boolean data types have only Yes or No value.

Correct Answer True

Your Answer False

 

Multiple Choice Multiple Answer

Question Within what Java provides many levels of protection to allow control over the visiblity of

variables and methods?

Correct Answer Classes , Subclasses , Packages

Your Answer Classes , Subclasses , Packages

 

Multiple Choice Single Answer

Question Java was developed at :-

Correct Answer Sun Microsystems

Your Answer Sun Microsystems

 

Multiple Choice Single Answer

Question Select the facility provided along with JVM which enhances speed of execution: -

Correct Answer Just-In-Time (JIT) compiler.

Your Answer Just-In-Time (JIT) compiler.

 

True/False

Question If the break statement is omitted in switch statement, then execution will continue on into

the next case.

Correct Answer True

Your Answer True

 

Multiple Choice Multiple Answer

Question What are the programming constructs?

Correct Answer Sequential , Selection -- if and switch statements , Iteration -- for loop, while loop and dowhile

loop

Your Answer Sequential , Selection -- if and switch statements , Iteration -- for loop, while loop and dowhile

loop

 

Multiple Choice Single Answer

Question Which statement will always execute the body of a loop at least once?

Correct Answer Do

Your Answer Do

 

True/False

Question A suspended thread can then be resumed allowing it to pick up where it left off.

Correct Answer True

Your Answer True

 

True/False

Question The Switch statement can have multiple cases without a break statements between them.

Correct Answer True

Your Answer True

 

Multiple Choice Multiple Answer

Question Which of the following are mathematical Expressions?

Correct Answer (+ +) , (+ =) , (- =)

Your Answer (+ +) , (+ =) , (- =)

 

True/False

Question In Interface we need not use the keyword abstract for the methods.

Correct Answer True

Your Answer True

 

Multiple Choice Single Answer

Question Syntax to declare a variable in java is :-

Correct Answer type identifier [=value][,identifier[=value]…]

Your Answer type identifier [=value][,identifier[=value]…]

 

Select The Blank

Question The range of Byte is ________

Correct Answer (-128 to 127)

Your Answer (-128 to 127)

 

Select The Blank

Question The mechanism by which java frees the memory occupied by unused objects is ________.

Correct Answer Garbage Collection

Your Answer Garbage Collection

 

Multiple Choice Multiple Answer

Question What are different data types in java?

Correct Answer char , double , byte

Your Answer char , double , byte

 

Select The Blank

Question ________ is the logical construct upon which the entire java language is built.

Correct Answer Class

Your Answer Class

 

Multiple Choice Multiple Answer

Question Method definition has four parts, they are :-

Correct Answer Name of the method , Type of object , List of parameters

Your Answer Name of the method , List of parameters , Class

 

Match The Following

Question Correct Answer Your Answer

For statement Initialization, condition, iteration Initialization, condition, iteration

Multi way branch statement Switch statement Switch statement

To terminate the statement Break Break

Iteration statement Do while Do while

 

Multiple Choice Single Answer

Question A Java application can execute anywhere on the network, this implements that Java is :-

Correct Answer Architecture neutral

Your Answer Architecture neutral

 

Select The Blank

Question ________ is referred by a variable candidate for garbage collection when the variable

goes out of scope.

Correct Answer Objects

Your Answer Objects

 

Multiple Choice Multiple Answer

Question Features of Java applets are :-

Correct Answer They can be transmitted over internet , Require java enabled web browser

Your Answer They can be transmitted over internet , They require web server for their operation ,

Require java enabled web browser

 

Multiple Choice Multiple Answer

Question Packages act as containers for :-

Correct Answer Classes , Subordinate packages

Your Answer Classes , Subordinate packages , Subclasses

 

Multiple Choice Single Answer

Question What is a string?

Correct Answer A combination of characters called as string

Your Answer A combination of characters called as string

 

Multiple Choice Single Answer

Question Multiple Choice Single Response

Correct Answer Object oriented programming.

Your Answer Object oriented programming.

 

Select The Blank

Question The ________ repeats a set of code at least once before the condition is tested.

Correct Answer Do-while loop

Your Answer Do-while loop

 

True/False

Question Range of char data type in java is 0 to 65,536.

Correct Answer True

Your Answer True

 

Multiple Choice Single Answer

Question How is it possible to use few methods of an interface in a class?

Correct Answer By declaring the class as abstract

Your Answer By declaring the class public

 

True/False

Question Casting between primitive types allows conversion of one primitive type to another.

Correct Answer True

Your Answer True

 

Multiple Choice Multiple Answer

Question Which of these lines of code will compile?

Correct Answer short s = 20; , char c = 32; , double d = 1.4;

Your Answer short s = 20; , char c = 32; , double d = 1.4;

 

Multiple Choice Multiple Answer

Question What are the Logical operators?

Correct Answer OR(|) , AND(&) , XOR(^)

Your Answer OR(|) , AND(&) , XOR(^)

 

True/False

Question When for loop start the execution, the initialization portion of the loop is executed.

Correct Answer True

Your Answer True

 

Match The Following

Question Correct Answer Your Answer

Class New data type New data type

Passing by value Methods - pass by value Methods - pass by value

Passing by reference Objects – pass by reference Objects – pass by reference

Methods and variable Members of class Members of class

 

Multiple Choice Single Answer

Question Which statement defines a name space in which classes are stored?

Correct Answer package

Your Answer package

 

Select The Blank

Question ________can be extended.

Correct Answer Interface

Your Answer Interface

 

Multiple Choice Single Answer

Question Java Applets are intelligent programs means :-

Correct Answer They can react to user input and dynamically change.

Your Answer They can be transmitted over internet.

 

Multiple Choice Single Answer

Question Which of the following is used to get the value of the instance variables?

Correct Answer Dot Notation

Your Answer Dot Notation

 

Multiple Choice Multiple Answer

Question Which statements can be used with the java's loop?

Correct Answer Jump , Continue , Break

Your Answer Continue , Break

 

Multiple Choice Multiple Answer

Question Java Operators can be divided into these groups :-

Correct Answer Arithmetic , Bitwise , Relational

Your Answer Arithmetic , Bitwise , Relational

 

Multiple Choice Single Answer

Question Which is the default access modifier for an interface method?

Correct Answer public

Your Answer public

 

Select The Blank

Question Anything declared ________ can be accessed from anywhere within program.

Correct Answer Public

Your Answer Public

 

Select The Blank

Question Java virtual machine works as ________ for the the bytecode.

Correct Answer Interpreter

Your Answer Interpreter

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Posted in: Java Programming (Set VIII)

JAVA Programming - 23

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

 

True/False

Question Casting occurs commonly between numeric types

Correct Answer True

Your Answer True

 

Multiple Choice Multiple Answer

Question When might your program wish to run the garbage collector?

Correct Answer Before it enters a compute-intense section of code , Before it enters a

memory-intense section of code , When it knows there will be some idle time

Your Answer When it knows there will be some idle time , Before it enters a memory-intense

section of code

 

Multiple Choice Single Answer

Question What are members of the threads class?

Correct Answer Method

Your Answer Method

 

True/False

Question Boolean data type have only Yes or No value.

Correct Answer True

Your Answer False

 

Select The Blank

Question The ________ loop is java's most fundamental looping statement.

Correct Answer While

Your Answer While

 

Multiple Choice Single Answer

Question In multithreaded program each part of such program is called :-

Correct Answer Thread

Your Answer Thread

 

Multiple Choice Multiple Answer

Question Which of the following are mathematical Expressions?

Correct Answer (+ +) , (+ =) , (- =)

Your Answer (+ =) , (- =)

 

True/False

Question A thread can be blocked when waiting for a resource.

Correct Answer True

Your Answer True

 

True/False

Question Each class in java can have a finalizer method.

Correct Answer True

Your Answer False

 

Multiple Choice Single Answer

Question Which statement has a the effect of "jumping out" of the switch statement?

Correct Answer Break

Your Answer Break

 

True/False

Question As abstract class must have at least one abstract method and others may be

concrete or abstract.

Correct Answer True

Your Answer True

 

Multiple Choice Single Answer

Question The argument to which specifies the delayperiod in milliseconds

Correct Answer sleep( )

Your Answer sleep( )

 

Select The Blank

Question When java program starts up, one thread begin runing and it is called

________thread.

Correct Answer main( )

Your Answer main( )

 

Multiple Choice Single Answer

Question class conditional { public static void main(String args[]) { int i = 20; int j = 55; int z = 0;

z = i < j ? i : j; // ternary operator System.out.println("The value assigned is " + z); } } } What is

output of the above program?

Correct Answer The value assigned is 20

Your Answer The value assigned is 20

 

True/False

Question When for loop start the execution, the initialization portion of the loop is executed.

Correct Answer True

Your Answer True

 

Select The Blank

Question ________ variables are declared by use of the Byte Keyword.

Correct Answer Byte

Your Answer Byte

 

Multiple Choice Single Answer

Question Which cast must be used to cast an object to another class?

Correct Answer Specific cast.

Your Answer Explicit cast.

 

Multiple Choice Multiple Answer

Question Which are keywords in Java?

Correct Answer Extends , Synchronized , Sizeof

Your Answer Extends , Synchronized , Sizeof

 

Multiple Choice Multiple Answer

Question What are different data types in java?

Correct Answer char , double , byte

Your Answer char , double , byte

 

Match The Following

Question Correct Answer Your Answer

The Operators used in mathematical expressions Arithmetic Operator (= operator;)

Order in which operators are evaluated in expressions. Order of precedence Order of precedence

Whether an expression is evaluated left-to-right or right-to-left. Associativity Associativity

Java operator syntax for right associativity (= operator;) Comparison Operator

 

Multiple Choice Single Answer

Question Java uses which system to store packages?

Correct Answer File system directories

Your Answer File system directories

 

True/False

Question Constructors can be overloaded like regular methods.

Correct Answer True

Your Answer True

 

Multiple Choice Multiple Answer

Question What are different modifiers?

Correct Answer Private , Protected , Final

Your Answer Private , Protected

 

Select The Blank

Question After the new thread is created, it will not start running until you call its

________method.

Correct Answer start( )

Your Answer start( )

 

Select The Blank

Question The ________ repeats a set of code at least once before the condition is tested.

Correct Answer Do-while loop

Your Answer Do-while loop

 

Select The Blank

Question ________ loop repeats a statement or block while its controlling expressions is true.

Correct Answer While

Your Answer While

 

Match The Following

Question Correct Answer Your Answer

The data, or variable, defined within a class Instance variable. Instance variable.

General form of Cast (target--type)value (target--type)value

Determine the relationship that one operand has to the other Relational Operator Comparison

operator

The secondary versions of the Boolean AND and OR operators Short-Circuit Logical Operators

Short-Circuit Logical Operators

 

Multiple Choice Multiple Answer

Question The Bitwise Logical Operators are :-

Correct Answer ^ , ^= , <<

Your Answer ^ , <<

 

Select The Blank

Question The name of the new thread is specified by ________.

Correct Answer threadName

Your Answer Currentthread

 

Select The Blank

Question ________ is probably the least used java data type

Correct Answer short

Your Answer short

 

Multiple Choice Single Answer

Question How to change the values of the elements of the array?

Correct Answer By using array subscript expression

Your Answer By specifying index number

 

Multiple Choice Single Answer

Question What is declared within the file that will belong to the specified pacakage?

Correct Answer classes

Your Answer classes

 

Multiple Choice Single Answer

Question How many concrete classes can you have inside an interface?

Correct Answer none

Your Answer none

 

True/False

Question A thread's priority is used to decide when to switch from one running thread to the

next, this is called as the context switch.

Correct Answer True

Your Answer True

 

Select The Blank

Question A class is ________ for an objects in java.

Correct Answer Template

Your Answer Template

 

Select The Blank

Question Anonymous classes be implemented in an ________.

Correct Answer Interface

Your Answer Method

 

True/False

Question When an object is referenced, it mean that it has been identified by the finalizer

method for garbage collection.

Correct Answer False

Your Answer False

 

Multiple Choice Multiple Answer

Question Features of Java applets are :-

Correct Answer They can be transmitted over internet , Require java enabled web browser

Your Answer They can be transmitted over internet , Require java enabled web browser , They

are intelligent programs.

 

Multiple Choice Multiple Answer

Question Classes usually consist of two things such as :-

Correct Answer Instance variable , Methods

Your Answer Instance variable , Methods

 

Multiple Choice Multiple Answer

Question Main thread is important for which two reasons?

Correct Answer It is thread from which other "child" thread will be swapped , Often it must be

the last thread to finish execution because It performs various shutdown actions

Your Answer It is thread from which other "child" thread will be swapped , Often it must be the

last thread to finish execution because It performs various shutdown actions

 

True/False

Question If the break statement is omited in switch statement, then execution will continue on

into the next case.

Correct Answer True

Your Answer True

 

Multiple Choice Multiple Answer

Question Which are the two threads of java?

Correct Answer mainthread( ) , childthread( )

Your Answer mainthread( ) , current

 

Select The Blank

Question The ________ repeat a set of code while the condition is false.

Correct Answer While loop

Your Answer For

 

Multiple Choice Multiple Answer

Question Which of these lines of code will compile?

Correct Answer short s = 20; , char c = 32; , double d = 1.4;

Your Answer short s = 20; , byte b = 128;

 

Multiple Choice Multiple Answer

Question What are means of encapsulating and containing the name space and scope of

variables and methods?

Correct Answer Classes , Packages , Subclasses

Your Answer Packages , Subclasses

 

Multiple Choice Single Answer

Question How is it possible to use few methods of an interface in a class?

Correct Answer By declaring the class as abstract

Your Answer By declaring the class as abstract

 

Multiple Choice Single Answer

Question Which statement will always execute the body of a loop at least once?

Correct Answer Do

Your Answer Do

Read more »

Posted in: Java Programming (Set VIII)