Placement Questions &amp; Answers :: Virtusa

Answer: Javutil.Map

Explanation:

Here is no explanation for this answer

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52. SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAME
FROM EMP e, DEPARTMENT d WHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID;
In the statement, which capabilities of a SELECT statement are performed?

A. Selection, projection, join

B. Difference, projection, join

C. Selection, intersection, join

D. Intersection, projection, join

E. Difference, projection, product

Answer: Selection, projection, join

Explanation:

Here is no explanation for this answer

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53. class ArrayTest {
public static void main(String[] args) {
int[][] a1 = {{1,2,3},{4,5,6},{7,8,9,10}};
System.out.print(a1[0][2]+","+a1[1][0]+","+a1[2][1]);
}
}

A. Prints: 3, 4, 8

B. Prints: 7, 2, 6

C. Run-time error

D. Compile-time error

Answer: Prints: 3, 4, 8

Explanation:

Here is no explanation for this answer

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54. public class TGo implements Runnable{
public static void main(String argv[]){
TGo tg = new TGo();
Thread t = new Thread(tg);
t.start();
}
public void run() {
while(true) {
Thread.currentThread().sleep(1000);
System.out.println("looping while");
}
}
}

A. Compilation and no output

B. Compilation and repeated output of "looping while"

C. Compilation and single output of "looping while"

D. Compile time error

Answer: Compilation and repeated output of "looping while"

Explanation:

Here is no explanation for this answer

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55. A method is declared to take three arguments. A program calls this method and passes only two arguments. What is the result?

A. Compilation fails.

B. The third argument is given the value null.

C. The third argument is given the value zero.

D. An exception occurs when the method attempts to access the third argument.

Answer: Compilation fails.

Explanation:

Compilation fails.

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56. Which is a valid definition of an interface called Transportable given another valid interface, Movable?

A. class Movable extends Transportable { /*…*/ }

B. interface Transportable extends Movable { /*…*/ }

C. class Movable implements Transportable { /*…*/ }

D. interface Transportable implements Movable { /*…*/ }

Answer: interface Transportable extends Movable { /*…*/ }

Explanation:

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57. Evaluate this SQL statement:
SELECT employee_id, e.department_id, department_name, salary
FROM employees e, departments d
WHERE e.department_id = d.department_id;

Which SQL statement is equivalent to the above SQL statement?

A. SELECT employee_id, department_id, department_name, salary FROM employees WHERE department_id IN (SELECT department_id FROM departments);

B. SELECT employee_id, department_id, department_name, salary FROM employees NATURAL JOIN departments;

C. SELECT employee_id, d.department_id, department_name, salary FROM employees e JOIN departments d ON e.department_id = d.department_id;

D. SELECT employee_id, department_id, department_name, salary FROM employees JOIN departments USING (e.department_id, department_i;