Tag: architecture

Questions Related to 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"); }
technology architecture

  1. default

  2. default, zero

  3. error default clause not defined

  4. no output displayed

Show answer
Correct Option: B

Which of the following statements are true?
technology architecture

  1. Methods cannot be overridden to be more private

  2. static methods cannot be overloaded

  3. private methods cannot be overloaded

  4. An overloaded method cannot throw exceptions not checked in the base class

Show answer
Correct Option: A

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

  1. if

  2. then

  3. goto

  4. while

  5. case

Show answer
Correct Option: B

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]); } }
technology architecture

  1. Error: anar is referenced before it is initialized

  2. null

  3. 0

  4. 5

Show answer
Correct Option: C

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; } }
technology architecture

  1. No such file found

  2. No such file found ,-1

  3. No such file found, Doing finally, -1

  4. 0

Show answer
Correct Option: C

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?
technology architecture

  1. Set

  2. List

  3. Map

  4. Vector

Show answer
Correct Option: A

Which of the following statements are true?
technology architecture

  1. At the root of the collection hierarchy is a class called Collection

  2. The collection interface contains a method called enumerator

  3. The interator method returns an instance of the Vector class

  4. The Set interface is designed for unique elements

Show answer
Correct Option: D

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’
technology architecture

  1. Update Employee set salary = salary * 1.5 and grade=’Promo’ where salary < 10000;

  2. Update Employee set salary = salary * 1.5, grade=’Promo’ where salary < 10000;

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

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

Show answer
Correct Option: B

Which of the following is Data Definition Language?
technology architecture

  1. INSERT

  2. CREATE

  3. UPDATE

  4. DELETE

Show answer
Correct Option: B

Which type of Statement can execute parameterized queries?
technology architecture

  1. PreparedStatement

  2. ParameterizedStatement

  3. ParameterizedStatement and CallableStatement

  4. All kinds of Statements (i.e. which implement a sub interface of Statement)

Show answer
Correct Option: A