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Multiple choice technology architecture

What will be printed out if you attempt to compile and run the following code? int i=9; switch (i) { default: System.out.println("default"); case 0: System.out.println("zero"); break; case 1: System.out.println("one"); case 2: System.out.println("two"); }

default
default, zero
error default clause not defined
no output displayed

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Multiple choice technology architecture

Which of the following statements are true?

Methods cannot be overridden to be more private
static methods cannot be overloaded
private methods cannot be overloaded
An overloaded method cannot throw exceptions not checked in the base class

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Multiple choice technology architecture

Which of the following is not keyword or reserved word in Java?

if
then
goto
while
case

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Multiple choice technology architecture

What will happen if you try to compile and run the following code? public class Q { public static void main(String argv[]){ int anar[]=new int[5]; System.out.println(anar[0]); } }

Error: anar is referenced before it is initialized
null
0
5

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Multiple choice technology architecture

What will be output if you try to compile and run the following code, but there is no file called Hello.txt in the current directory? import java.io.*; public class Mine { public static void main(String argv[]){ Mine m=new Mine(); System.out.println(m.amethod()); } public int amethod() { try { FileInputStream dis=new FileInputStream("Hello.txt"); }catch (FileNotFoundException fne) { System.out.println("No such file found"); return -1; }catch(IOException ioe) { } finally{ System.out.println("Doing finally"); } return 0; } }

No such file found
No such file found ,-1
No such file found, Doing finally, -1
0

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Multiple choice technology architecture

You need to create a class that will store unique object elements. You do not need to sort these elements but they must be unique. What interface might be most suitable to meet this need?

Set
List
Map
Vector

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Multiple choice technology architecture

Which of the following statements are true?

At the root of the collection hierarchy is a class called Collection
The collection interface contains a method called enumerator
The interator method returns an instance of the Vector class
The Set interface is designed for unique elements

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Multiple choice technology architecture

There is a table called Employee having columns are empno, ename , job , deptno,grade and salary. Which of the following is a correct query to change all emp salary with salary<10000 to 1.5 times and grade to ‘Promo’

Update Employee set salary = salary * 1.5 and grade=’Promo’ where salary < 10000;
Update Employee set salary = salary * 1.5, grade=’Promo’ where salary < 10000;
Update table Employee set salary = salary * 1.5, grade=’Promo’ where salary < 10000;
Update table Employee set salary = salary * 1.5 and grade=’Promo’ where salary < 10000;

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Multiple choice technology architecture

Which of the following is Data Definition Language?

INSERT
CREATE
UPDATE
DELETE

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Multiple choice technology architecture

Which type of Statement can execute parameterized queries?

PreparedStatement
ParameterizedStatement
ParameterizedStatement and CallableStatement
All kinds of Statements (i.e. which implement a sub interface of Statement)

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Tag: architecture

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