TCS Tech Lounge JAVA Final-18

An Input device which can read characters directly from an ordinary piece of paper is

Ans: OCR

parseInt() and parseLong() method throws__ ___  _ _ _ ?

Ans: NumberFormatException

To explicitly throw an exception, _ _ _ _ keyword is used.

Ans: throw

How many parameters does the skipByte() accept in DataInputStream class?

Ans: 1

Is the skipByte() of DataInputStream final

Ans: false

Public class Exam1{

Private int a;

Public static void main(Strings[]arg){

/* complete the code using the options so that O is printed in console*/

}           }

ANS: System.out.println(new Exam1().a);

class AccountHolder{

            public AccountHolder(int count){

                       

            }

}

class Account{

            Account(){

                       

            }

}

class Demo{

            public static void main(String[]args){

                        AccountHolder accountholder;

                        accountholder = new AccountHolder();

                        Account accountOne = new Account();

                        Account accountTwo = new Account();

                        Account accountThree = accountTwo;

                        accountThree = accountOne;            

            }

}           while executing the above code, how many reference variable and objects will be crrated

Ans: 3 Objects and 4 references

InputStream class has one constructor.

Ans: True

Java has the characteristic

Ans: All of the above( Portable, Robust, Architecture neutral)

A deployment descriptor describes

Ans: web component settings

What data type does readLine() return?

Ans: String

Which among the following is wrong?

Ans: abstract class can have only static final(constant) variable i.e, by default

What is the result of x when the following loop exists?

Int x=0;

For(in i=0;i<10;i++){
if(i==5){

Continue; }

X++;

}
Ans: 9

String s =”kolkatta”.replace(‘k’,’a’) ?

What would the string “s” would contain after successful execution of the above statement?

Ans: aolaata

The below query returns the students whose age is between 20 to 24 including 20 and 24 also. Select * from Student where Age BETWEEN 20 AND 24

Ans: TRUE

Which life cycle method is called only once in the serbvlet life cycle

Ans: init()