1.
compareTo(Object) belongs to which class?
1. Collections
2. Comparator
3. Comparable
4. Arrays
2.
singletonList(Object) method is defined in?
1. class ArrayList
2. interface List
3. interface Collection
4. class Collections
3.
When a thread is started with start() method, in which state it exists?
1. born state
2. runnable state
3. blocked state
4. dead state
4.
Following is the code.
class Demo extends Thread
{
public static void main(String args[])
{
Demo d1 = new Demo();
d1.start();
d1.start();
}
}
In the above code, thread d1 is started twice.
1. It is compilation error
2. It throws exception
3. It compiles and runs without a problem
4. Thread’s life cycle does not start
5.
class Demo
{
public void run()
{
System.out.println(“Hello”);
}
public static void main(String args[])
{
Demo d1 = new Demo();
Thread t1 = new Thread(d1);
t1.start();
}
}
The above code
1. Compiles, executes and prints Hello
2. Compiles, executes and does not print Hello
3. Compiler raises error
4. Compiles but at runtime throws exception
6.
What is the need for exception handling?
1. Designers did not promise exception handling in JDK 1.0
2. Introduced in JDK 1.1
3. To see the code looks smarter with try-catch-finally blocks
4. To see that code executes in spite of problem occurs created by user
7.
class Demo
{
public static void main(String args[])
{
int a = 10, b = 0, c;
c = a/b;
System.out.println(c);
}
}
The above code
1. Does not compile as ArithmeticException is not handled
2. The code compiles but does not execute.
3. The code prints 0
4. The code prints Infinity.
8.
Observe, the following snippet of code.
public static void main(String args[])
{
try { System.out.println(10/0); }
catch(Exception e) { System.out.println(“Hello 1”); }
catch(ArithmeticException e) { System.out.println(“Hello 2”); } }
}
The output of the above code is
1. Hello 1
2. Hello 2
3. Compiles but does not execute
4. Does not compile
9.
EOFException is a subclass of
1. IOException
2. RuntimeException
3. FileMarkerException
4. FileException
10.
To copy an image file which stream class can be used?
1. FileInputStream
2. FileReader
3. File
4. ImageInputStream
11.
import java.io.*;
class Demo
{
public static void main(String args[])
{
FileInputStream fis;
try
{
fis = new FileInputStream(“abc.txt”);
}
catch(Exception e) { }
finally { try { fis.close(); } catch(Exception e) { } }
}
}
The above code
1. Does not compile
2. Compiles but does not execute
3. compiles and executes
4. fis should not be closed in finally block
12.
JdbcOdbcDriver is
1. Bridge driver
2. Thin driver
3. Remote driver
4. Native API drive
13.
Which method returns an object of PreparedStatement?
1. preparedStatement()
2. prepareStatement()
3. preparedCall()
4. prepareCall()
14.
Which exception is thrown by Class.forName() method?
1. SQLException
2. JdbcOdbcException
3. DatabaseConnectionException
4. ClassNotFoundException
15.
Which is the best practice for executing different multiple SQL statements on the database with JDBC?
1. Partially compiled with PreparedStatement
2. Executing stored procedures with CallableStatement
3. addBatch() method of Statement
4. execute() method of Statement
16.
Servlet lifecycle methods are
1. init(), start(), destroy()
2. init(), start(), atop()
3. init(), service(), destroy()
4. start(), doService(), destroy()
17.
The parameter of init() method is an object of
1. ServletConfig
2. ServletContext
3. initFilter
4. FilterListener
18.
What is the return type of getOutputStream()?
1. OutputStream
2. ServletOutputStream
3. PrintStream
4. ServletStream
19.
The method getSession() is defined in
1. HttpServlet
2. HttpServletRequest
3. HttpSession
4. ServletConfig
20.
getRequestDispatcher() method is defined in
1. ServletRequest
2. ServletContext
3. ServletRequest and ServletContext
4. RequestDispatcher
21.
Cookie c1 = new Cookie(“Lux”, 2);
To send c1 to client and to retrieve Lux and 2, what methods can be used?
1. sendCookie(), getCookieName(), getCookieValue()
2. sendCookie(), getName(), getValue()
3. addCookie(), getCookieName(), getCookieValue()
4. addCookie(), getName(), getValue()
22.
Which JSP lifecycle method cannot be overridden by Developer?
1. init()
2. _init()
3. jspService()
4. _jspService()
23.
<%@ taglib uri=”http://java.sun.com/jsp/jstl/core” prefix=”c” %>
<body>
<c:set var=”salary” value=”5000″/>
<c:if test=”${salary < 5000}”>
<c:out value=”Big Man”/>
</c:if>
</body>
The above JSTL snippet of output
1. compilation error as the syntax of if tag is incorrect.
2. false
3. Big Man
4. No output
24.
Observe the following snippet of code? Choose the right option that is true.
<body>
<%!
public void calculate(int x, int y)
{
out.println(x*y);
}
%>
<%
calculate(10, 20);
%>
</body>
1. Client gets the response of 200
2. Code has errors and thereby not compiled by container
3. void return type cannot send JSP response to client
4. We cannot pass parameters from scriptlet to declaration without throwing exceptions
25. Command Interpreter is —————-
1. shell
2. kernal
3. hardware
4. application libraries
26. In preemptive multitasking
1. slice is not the concept on which multitasking works
2. time slices do not exist
3. when one time slice is over control goes to another slice of another program
4. none above
27. In Unix file system, the top-level directory is known as
1. exception
2. root (denoted by just /, slash)
3. main
4. heir
28. In Unix, unshareable files can be accessed by
1. local systems and remote hosts
2. local systems only
3. remote systems only
4. none above
29. Which type of exceptions are called Oracle named exceptions?
1. user-defined exception
2. external exception
3. predefined exception
4. internal exception
30. What is the problem in the following Oracle code? Choose the right option that is true.
CREATE OR REPLACE PROCEDURE ZERODIVISION(x IN NUMBER, y IN NUMBER)
IS
z NUMBER;
begin
z := x/y;
dbms_output.put_line(‘Value is ‘ || z);
EXCEPTION
WHEN ZERO_DIVIDE THEN
dbms_output.put_line(‘Take care of zero input values.’);
END;
/
1. z NUMBER is not in DECLARE statement
2. problem in dbms_output statement
3. ZERO_DIVIDE is undefined
4. no problem in the code and executes fine
31. Choose the right option to fill the blank.
create or replace procedure division_calculate(x in number, y in number)
IS
zerodivide_detected EXCEPTION;
——————————————— — blank
z number;
BEGIN
z := x/y;
dbms_output.put_line(‘Value is ‘ || z);
EXCEPTION
WHEN zerodivide_detected THEN
dbms_output.put_line(‘Avoid zero by division’);
END;
1. PRAGMA EXCEPTION_INIT(zerodivide_detected, -1476);
2. PRAGMA EXCEPTION_INIT(zerodivide_detected, 1476);
3. EXCEPTION_INIT(zerodivide_detected, -1476);
4. PRAGMA_INIT(zerodivide_detected, -1476);
32. Choose the right option that is FALSE for the following code.
DECLARE
age_exception EXCEPTION;
visitor_age NUMBER := 9;
PRAGMA EXCEPTION_INIT(age_exception, -1000);
BEGIN
IF visitor_age < 10 THEN
RAISE age_exception;
END IF;
DBMS_OUTPUT.PUT_LINE(‘Enjoy water games’);
EXCEPTION
WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE(‘Not permitted for water games. Go for other’);
END;
1. code compiles even the Pragma statement is not the first one in DECLARE block
2. code compiles even age_exception is not handled in EXCEPTION block
3. code compiles as OTHERS is written without using age_exception before
4. code does not compile as Pragma syntax is wrong
33. Choose the right option that is FALSE.
1. In Composite type variables, we can delete elements from a nested table using the built-in procedure DELETE
2. We can access each element of a collection variable by its unique index.
3. Collection and Records are two types of composite data types.
4. In Composite type variables, indexes in associative array are stored in addition order and not in sorted order.
34. Choose the option that is true for the following code in Oracle.
DECLARE
num1 number(3) := 123.5432;
BEGIN
dbms_output.put_line(num1);
END;
What is the output for the above put_line statement.
1. 123.5432
2. 123
3. 124
4. none above
35. Choose the right option that fits in the blank to compile and execute successfully.
DECLARE
grade varchar(10);
BEGIN
grade := ‘A’;
CASE grade
————————- — blank here
dbms_output.put_line(‘Excellent’);
ELSE
dbms_output.put_line(‘No such grade’);
END CASE;
END;
1. WHEN grade = ‘A’ THEN
2. WHEN grade := ‘A’ THEN
3. WHEN ‘A’ THEN
4. none above
36. Choose the right option for the blank in the following associative array to compile successfully.
DECLARE
TYPE marks IS TABLE OF NUMBER INDEX BY VARCHAR2(20);
student marks;
BEGIN
student(‘Rao’) := 55;
student(‘Yadav’) := 65;
student(‘Reddy’) := 75;
——————————————— — blank here
END;
Which option prints Rao ?
1. dbms_output.put_line(student.FIRST);
2. dbms_output.put_line(student(‘rao’));
3. dbms_output.put_line(student(student.FIRST));
4. dbms_output.put_line(student(student.FIRST));
37. Choose the right option that is true for the following Collection record.
DECLARE
e_record Employee%ROWTYPE; — Line 1
BEGIN
e_record.empid := 106;
e_record.empname := ‘ION’;
e_record.empsal := 456.50;
INSERT INTO Employee VALUES e_record; — Line 2
dbms_output.put_line(‘record inserted’);
END;
1. Code does not compile due to error at Line 1
2. Code does not compile due to error at Line 2
3. Code does not compile due to error at Line 1 and Line 2
4. Code compiles successfully and output will be displayed
38. Choose the right option that is true regarding SQL cursors.
1. Implicit cursor is not created by the Oracle engine automatically,
2. %ISCLOSE is a cursor attribute.
3. Cursor does not refer to a context area of a DML statement.
4. Declaring the cursor defines cursor with a name and the associated SELECT statement.
39. Choose the right option to fill the blank in the following explicit cursor code to terminate the loop.
DECLARE
person_name Person.pname%type;
person_address Person.paddress%type;
CURSOR persons is
SELECT pname, paddress FROM Person;
BEGIN
OPEN persons;
LOOP
FETCH persons into person_name, person_address;
——————————————– — blank here to terminate the loop
dbms_output.put_line(person_name || ‘ – ‘ || person_address);
END LOOP;
CLOSE persons;
END;
1. EXIT WHEN persons%notfound;
2. EXIT WHEN persons sql%notfound;
3. CLOSE WHEN persons%notfound;
4. none above
40. Choose the right option for the blank, that compiles successfully, in the following user-defined function.
CREATE OR REPLACE FUNCTION get_id(salary number)
RETURN number
IS
eid number;
BEGIN
——————————————————————————– — blank here
dbms_output.put_line(eid);
RETURN(eid);
END;
1. SELECT empid INTO empsal FROM Employee WHERE empsal = salary;
2. SELECT empid INTO salary FROM Employee WHERE empsal = salary;
3. SELECT eid INTO empid FROM Employee WHERE empsal = salary;
4. SELECT empid INTO eid FROM Employee WHERE empsal = salary;
SOLUTIONS
1. 3 2. 4 3. 2 4. 2
5. 3 6. 4 7. 2 8. 4
9. 1 10. 1 11. 1 12. 1
13. 2 14. 4 15. 3 16. 3
17. 1 18. 2 19. 2 20. 3
21. 4 22. 4 23. 4 24. 2
25. 1 26. 3 27. 2 28. 2
29. 1 30. 4 31. 1 32. 4
33. 4 34. 3 35. 3 36. 1
37. 4 38. 4 39. 1 40. 4
