JAVA interview question set 12

Which of these data type cannot be type parameterized?

1 Mark(s)

Array
List
Map
Set

Which attribute is used to specify destroy method?

1 Mark(s)

destroy
destroy-method
destruction
destruction-method

Which of the following is not true about Java beans?

1 Mark(s)

Implements java.io.Serializable interface
Extends java.io.Serializable class
Provides no argument constructor
Provides setter and getter methods for its properties

Which of the following is used to call stored procedure?

1 Mark(s)

Statement
PreparedStatement
CallableStatment
CalledStatement

Which of the below is not a valid design pattern?

1 Mark(s)

Singleton
Factory
Command
Java

Which of the following is not a JDBC connection isolation levels?

1 Mark(s)

TRANSACTION_NONE
TRANSACTION_READ_COMMITTED
TRANSACTION_REPEATABLE_READ
TRANSACTION_NONREPEATABLE_READ

What does setAutoCommit(false) do?

1 Mark(s)

commits transaction after each query
explicitly commits transaction
does not commit transaction automatically after each query
never commits transaction

How to specify autowiring by name?

1 Mark(s)

@Qualifier
@Type
@Constructor
@Name

Which of the following contains both date and time?

1 Mark(s)

java.io.date
java.sql.date
java.util.date
java.util.dateTime

Which of these keywords is used to upper bound a wildcard?

1 Mark(s)

stop
bound
extends
implements

Which of these is wildcard symbol?

1 Mark(s)

It is used in cases when type being operated upon is not known
It is used to make code more readable
It is used to access members of super class
It is used for type argument of generic method

Which of the following is method of JDBC batch process?

1 Mark(s)

setBatch()
deleteBatch()
removeBatch()
addBatch()

Which of the below is not a valid classification of design pattern?

1 Mark(s)

Creational patterns
Structural patterns
Behavioural patterns
Java patterns

Which of the following is used to limit the number of rows returned?

1 Mark(s)

setMaxRows(int i)
setMinRows(int i)
getMaxrows(int i)
getMinRows(int i)

Which of these instance cannot be created?

1 Mark(s)

Integer instance
Generic class instance
Generic type instance
Collection instances

Which of the following is advantage of using JDBC connection pool?

1 Mark(s)

Slow performance
Using more memory
Using less memory
Better performance

Which of the following is not an Enterprise Beans type?

1 Mark(s)

Doubleton
Singleton
Stateful
Stateless

Which of the following is used to rollback a JDBC transaction?

1 Mark(s)

rollback()
rollforward()
deleteTransaction()
RemoveTransaction()

Which attribute is used to specify initialization method?

1 Mark(s)

init
init-method
initialization
initialization-method

Which attribute is used to specify destroy method?

1 Mark(s)

destroy
destroy-method
destruction
destruction-method

Which of the following is not a feature of Beans?

1 Mark(s)

Introspection
Events
Persistence
Serialization

Which file separator should be used by MANIFEST file?

1 Mark(s)

/
\
–
//

Which of the following keywords are used for lower bounding a wild card?

1 Mark(s)

extends
super
class
lower

Which of these types cannot be used to initiate a generic type?

1 Mark(s)

Integer class
Float class
Primitive Types
Collections

Java Beans are extremely secured?

1 Mark(s)

TRUE
FALSE

Which of the following is correct error when loading JAR file with duplicate name?

1 Mark(s)

java.io.NullPointerException
java.lang.ClassNotFound
java.lang.ClassFormatError
java.lang.DuplicateClassError

Which of the following is advantage of using PreparedStatement in Java?

1 Mark(s)

Slow performance
Encourages SQL injection
Prevents SQL injection
More memory usage

What is the attribute of java bean to specify scope of bean to have single instance per Spring IOC?

1 Mark(s)

prototype
singleton
request
session

Which of the below author is not a part of GOF (Gang of Four)?

1 Mark(s)

Erich Gamma
Gang Pattern
Richard Helm
Ralph Johnson

Which of these is an correct way making a list that is upper bounded by class Number?

1 Mark(s)

List
List
List(? extends Number)
List(? UpperBounds Number)

JAVA interview question set 12 : Question 1 of 30