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Home Questions & Answer Technology Questions & Answers Java programming Questions & Answers

Java programming Questions & Answers (Compiled from UPSC, SSC ,PSC ,IBPS previous question papers)

JAR file contains the compressed version of
A.java file
B.class file

C.jsp file
DNone of above

In java, gc() method is available in which package
Ajava.lang package

Bjava.util package
Cjava.awt package
Djava.io package

All methods of interface are public and abstract
ATrue

BFalse

Execution of the program is always begins with
AMain method

Bclass contain main method
Cparent class
Ddefault package

Super is the predefined
AKeyword
BMethod
CKeyword and Method

DNone of above

String is the predefined
AMethod
BClass

CVariable
DObject

Which type of inheritance is not supported by java
ASingle
BMultiple

CMulilevel
DHirarchical

Inheritance means
ASub class extends super class

BSub class extends Base class
CSub class create object of super class
DAll of the above

Methods that have same name, but different Parameter list and different definition known as
AOverriding
BConstructor
COverloading

Dnone of these

If method have same name as class name and method dont have any return type then it is known as
ADestructors
BObject
CVariable
DConstructor

x=x+1 is equivalent to
A++x
Bx++

Cx=x-1
DNone of these

pow () is associated with which class
AMath class

BInput stream class
CObject class
DNone of above

After the compilation of the java source code, which file is created by the JVM
A.class

JIT meaning
Ajava in time
Bjust in time

Cjoin in time
Dnone of above

Minimum threads in a program are
A1

Thread class is available in
Ajava.io package
Bjava.lang package

Cjava.awt package
Djava.util package

All collection classes are available in
Ajava.io package
Bjava.lang package
Cjava.awt package
Djava.util package

Object which can store group of other objects is called
ACollection object

BJava object
CPackage
DWrapper

Which method executes only once
Astart() method
Binit() method

Cstop() method
Ddestroy() method

Package of drawstring() method is
Ajava.applet
Bjava.io
Cjavax.swing
Djava.awt

Converting a primitive type data into its corresponding wrapper class object instance is called
Aboxing
Bwrapping
Cinstantiation
Dautoboxing

The Externizable interface extends the serializable interface
ATrue

BFalse

Which of the following statements about arrays is syntactically wrong
AarrayName[] p = new arrayName[5];
BarrayName p[5];

CarrayName[] p [];
DarrayName p[][] = new arrayName[2][];

The class java.sql.Timestamp is associated with
Ajava.util.Time
Bjava.sql.Time
Cjava.util.Date

DNone of above

All raw data types should be read and uploaded to the database as an array of
Aint
Bchar
Cbollean
Dbyte

The JDBC-ODBC bridge is
AMultithreaded

BSinglethreaded
CBoth of above
DNone of above

Which statement is static and synchronized in JDBC API
AexecuteQuery()
BexecuteUpdate()
CgetConnection()

DprepareCall()

Program which executes applet is known as
Aapplet engine

Bvirtual machine
CJVM
DNone of above

Java beans have no types
ATrue

BFalse

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