Asynchronous windowing tool kit

Changing the way you learn

Question 1

Question

What modifier is to be used if you wish to declare that you want to no longer allow subclasses to override your variables or methods?

Answer

Finally
Abstract
Final
Synchronized
Volatile

Question 2

Question

AWT stands for

Answer

Advanced windowing tool kit
Abstract Windowing Term Kit
Abstract Windowing Tool Kit
Applet Window Tool Kit
Asynchronous windowing tool kit

Question 3

Question

Which operator is used for concatenation in java?

Answer

-
. (Dot)
*
%
+

Question 4

Question

What is the type and value of the following expression? -4 + 1/2 + 2*-3 + 5.0

Answer

int -5
double -4.5
int -4
double -5.0

Question 5

Question

In object-oriented programming, the process by which one object acquires the properties of another object is called

Answer

Encapsulation
Polymorphism
Overloading
Inheritance
Overriding

Question 6

Question

Java compiler javac translates Java source code into ………………………

Answer

Assembler language
Byte code
Bit code
Machine code
Platform dependent code

Question 7

Question

Which of the following statements about Java Threads is correct?

Answer

Java threads don’t allow parts of a program to be executed in parallel
Java is a single-threaded language
Java’s garbage collector runs as a high priority thread
Ready, running and sleeping are three states that a thread can be in during its life cycle
Every java application is not multithreaded

Question 8

Question

The wrapping up of data and functions into a single unit is called

Answer

Encapsulation
Abstraction
Data Hiding
Polymorphism
Message passing

Question 9

Question

In Java, declaring a class abstract is useful

Answer

To prevent developers from further extending the class
When it doesn't make sense to have objects of that class
When default implementations of some methods are not desirable
To force developers to extend the class not to use its capabilities
When it makes sense to have objects of that class

Question 10

Question

Which of the following is a member of the java.lang package?

Answer

List
Queue
Math
Stack
Process

Question 11

Question

URL stands for

Answer

Universal reader locator
Universal reform loader
Uniform resource loader
Uniform resource locator
Uniform reader locator

Question 12

Question

What is the sequence of major events in the life of an applet?

Answer

init, start, stop, destroy
start, init , stop , destroy
init, start , destroy, stop
init, start, destroy
destroy, start, init, stop

Question 13

Question

What will be the result of the expression 13 & 25?

Answer

Question 14

Question

What information may be obtained from a ResultSetMetaData object?

Answer

Database URL and product name
JDBC driver name and version
Number of columns in the result set
Number of rows in the result set
Number of tables in the database

Question 15

Question

Which is a special file that contains information about the files packaged in a JAR file?

Answer

Class file
Source file
Text file
Manifest file
Image file

Question 16

Question

Evaluate the Java expressions: int i=3, j=7, k=11; j + k % i

Answer

Question 17

Question

Which of the following provides the naming services for the server to register the object and for the client to locate the object?

Answer

Server object interface
Server implementation
RMI Registry
Server stub
Server Skeleton

Question 18

Question

Which is not a valid operator in Java?

Answer

Question 19

Question

Which of the following is not an Applet method?

Answer

start()
init()
run()
stop()
destroy()

Question 20

Question

If ClassA extends ClassB, then

Answer

ClassA is a superclass
ClassB is a base class
ClassB is a subclass
ClassB is a derived class
ClassA is a base class

Question 21

Question

SSL stands for

Answer

Secure Server Layer
Secure Socket Layer
Server Socket Layer
Session Service Layer

Question 22

Question

Consider the following HTML page code: < html > < body > < a href='/servlet/HelloServlet' >POST< /a > < /body >< /html > Which method of HelloServIet will be invoked when the hyperlink is clicked?

Answer

doGet
doPost
doHref
servicePost

Question 23

Question

Stub is a ____________ proxy for the remote object.

Answer

Server side
Client side
Both side
none of the above

Question 24

Question

What is the Output: String s1 = new String("Test"); String s2 = new String("Test"); if (s1==s2) System.out.println("Same"); if (s1.equals(s2)) System.out.println("Equals");

Answer

Same Equals
Equals
Same
The code compiles, but nothing is displayed upon execution.
The code fails to compile

Question 25

Question

Which declaration of the main method below would allow a class to be started as a standalone program.

Answer

public static int main(char args[])
public static void main(String args[])
public static void main(string args[])
public static void main(String args)

Question 26

Question

Which of these are legal identifiers.

Answer

number_1
number_a
$1234
All of the above

Question 27

Question

Which of the following are keywords in Java.

Answer

implement
friend
NULL
synchronized

Question 28

Question

Given a one dimensional array arr, what is the correct way of getting the number of elements in arr.

Answer

arr.length
arr.length - 1
arr.size
arr.length()

Question 29

Question

A class can have many methods with the same name as long as the number of parameters or type of parameters is different. This OOP concept is known as

Answer

Method Invocating
Method Overriding
Method Labeling
Method Overloading

Question 30

Question

Is this True or False. In Java an abstract class cannot be sub-classed.

Answer

True
False

Question 31

Question

What is returned when the method substring(2, 4) is invoked on the string "example"? Include the answer in quotes as the result is of type String.

Answer

"xa"
"am"
"xm"
"xamp"

Question 32

Question

What is the result of evaluating the expression 14 ^ 23. Select the one correct answer.

Answer

Question 33

Question

Which of the following is not a return type?

Answer

boolean
void
public
Button

Question 34

Question

Which operator is used to perform bitwise exclusive or.

Answer

Question 35

Question

If result = 2 + 3 * 5, what is the value and type of result variable?

Answer

17, byte
25, byte
17, int
25, int

Question 36

Question

All the wrapper classes (Integer, Boolean, Float, Short, Long, Double and Character) in java

Answer

are final
are private
are serializable
are immutatable

Question 37

Question

What is the result of compiling and running this program? Select the one correct answer. public class test { public static void main(String args[]) { int i, j; int k = 0; j = 2; k = j = i = 1; System.out.println(k); } }

Answer

The program does not compile as k is being read without being initialized.
The program does not compile because of the statement k = j = i = 1;
The program compiles and runs printing 1.
The program compiles and runs printing 2.

Question 38

Question

A program needs to store the name, salary, and age of employees in years. Which of the following data types should be used to create the Employee class. Select the three correct answers. a. char b. boolean c. Boolean d. String e. int f. double

Answer

a,d,f
a,e,f
d,e,f
d,a,e

Question 39

Question

When we go for thread synchronization?

Answer

to remove the lock on the thread
when there is a single thread
to make a thread in sleep mode
when we want to prevent any other multiple thread to act an same object

Question 40

Question

Which statement is true? public void test(int x) { int odd = 1; if(odd) { System.out.println("odd"); } else { System.out.println("even"); } }

Answer

"odd" will always be output.
"even" will always be output.
Compilation fails.
"odd" will be output for odd values of x, and "even" for even values.

Question 41

Question

Which code determines the int value data closer to, but not greater than, a double value b?

Answer

int data = (int) Math.floor(b);
int data = (int) Math.abs(b);
int data = (int) Math.ceil(b);
int data = (int) Math.min(b);

Question 42

Question

Which of the following statements is false as far as different type of statements is concern in JDBC?

Answer

Regular Statement
Interim Statement
Callable Statement
Prepared Statement

Question 43

Question

Which of the following describes the correct sequence of the steps involved in making a connection with a database. 1. Loading the driver 2. Process the results. 3. Making the connection with the database. 4. Executing the SQL statements.

Answer

1,2,3,4
1,3,4,2
2,1,3,4
4,1,2,3

Question 44

Question

Which one not a JDBC interface?

Answer

Connection
Statement
DriverManager
ResultSet

Question 45

Question

Which one is a correct MySql Driver class name?

Answer

com.mysql.jdbc.driver.Driver
com.jdbc.mysql.Driver
com.mysql.jdbc.Driver
none of these

Question 46

Question

Which one correct JDBC statements?

Answer

Statement
PreparedStatement
CallableStatement
all of above

Question 47

Question

Where the stored procedures reside?

Answer

In side server memory
In side cache
In side database
In side browser

Question 48

Question

By default cursor pointing to-

Answer

Column Header
First Record
Last Record
Middle Record

Question 49

Question

By default "auto commit" option is -

Answer

true
false

Question 50

Question

We can get the column names using?

Answer

ResultSetColumnData
ResultSetMetaData
ResultSetHeaderData
ResultSetTableData

Question 51

Question

SELECT, INSERT, DELETE, UPDATE, COMMIT and ROLLBACK comes under ?

Answer

	Created by Faheem Ahmed about 6 years ago

Next up

Programming in Java

Description

Resource summary

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36

Question 37

Question 38

Question 39

Question 40

Question 41

Question 42

Question 43

Question 44

Question 45

Question 46

Question 47

Question 48

Question 49

Question 50

Question 51

Similar