Question 1     

A

+



B

&



C

join



D

+=

Question 2     

A

Class



B

datatype



C

variable

Question 3     

A

Serializable



B

Comparable



C

CharSequence



D

StringBuffer

Question 4     

A

.length



B

.length()



C

.sizeOf()



D

.size()

Question 5     

A

.get()



B

.charat()



C

.index()



D

.charAt()



E

None of the above

Question 6     

A

String objects are immutable, they cannot be changed



B

String object can point to some other reference of String variable



C

StringBuffer class is used to store string in a buffer for later use



D

None of the Above

Question 7     

A

Heap



B

volatile memory



C

string constant pool



D

None of the Above

Question 8     

A

1



B

2



C

3



D

0

Question 9     

A

indexOf()



B

isEmpty()



C

isAlpha()



D

trim()

Question 10     

A

1



B

2



C

3



D

4



E

None of the above