13008545
Beschreibung
Quiz von Faheem Ahmed, aktualisiert more than 1 year ago
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Erstellt von Faheem Ahmed
vor mehr als 6 Jahre
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Frage 1
Frage
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?
Antworten
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Finally
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Abstract
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Final
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Synchronized
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Volatile
Frage 2
Frage
AWT stands for
Antworten
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Advanced windowing tool kit
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Abstract Windowing Term Kit
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Abstract Windowing Tool Kit
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Applet Window Tool Kit
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Asynchronous windowing tool kit
Frage 3
Frage
Which operator is used for concatenation in java?
Antworten
-
-
-
. (Dot)
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*
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%
-
+
Frage 4
Frage
What is the type and value of the following expression?
-4 + 1/2 + 2*-3 + 5.0
Antworten
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int -5
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double -4.5
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int -4
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double -5.0
Frage 5
Frage
In object-oriented programming, the process by which one object acquires the properties of another object is called
Antworten
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Encapsulation
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Polymorphism
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Overloading
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Inheritance
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Overriding
Frage 6
Frage
Java compiler javac translates Java source code into ………………………
Antworten
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Assembler language
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Byte code
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Bit code
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Machine code
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Platform dependent code
Frage 7
Frage
Which of the following statements about Java Threads is correct?
Antworten
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Java threads don’t allow parts of a program to be executed in parallel
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Java is a single-threaded language
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Java’s garbage collector runs as a high priority thread
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Ready, running and sleeping are three states that a thread can be in during its life cycle
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Every java application is not multithreaded
Frage 8
Frage
The wrapping up of data and functions into a single unit is called
Antworten
-
Encapsulation
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Abstraction
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Data Hiding
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Polymorphism
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Message passing
Frage 9
Frage
In Java, declaring a class abstract is useful
Antworten
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To prevent developers from further extending the class
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When it doesn't make sense to have objects of that class
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When default implementations of some methods are not desirable
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To force developers to extend the class not to use its capabilities
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When it makes sense to have objects of that class
Frage 10
Frage
Which of the following is a member of the java.lang package?
Antworten
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List
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Queue
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Math
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Stack
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Process
Frage 11
Frage
URL stands for
Antworten
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Universal reader locator
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Universal reform loader
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Uniform resource loader
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Uniform resource locator
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Uniform reader locator
Frage 12
Frage
What is the sequence of major events in the life of an applet?
Antworten
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init, start, stop, destroy
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start, init , stop , destroy
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init, start , destroy, stop
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init, start, destroy
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destroy, start, init, stop
Frage 13
Frage
What will be the result of the expression 13 & 25?
Antworten
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38
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25
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9
-
12
-
21
Frage 14
Frage
What information may be obtained from a ResultSetMetaData object?
Antworten
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Database URL and product name
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JDBC driver name and version
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Number of columns in the result set
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Number of rows in the result set
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Number of tables in the database
Frage 15
Frage
Which is a special file that contains information about the files packaged in a JAR file?
Antworten
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Class file
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Source file
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Text file
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Manifest file
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Image file
Frage 16
Frage
Evaluate the Java expressions:
int i=3, j=7, k=11;
j + k % i
Antworten
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9
-
0
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7
-
12
-
10
Frage 17
Frage
Which of the following provides the naming services for the server to register the object and for the client to locate the object?
Antworten
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Server object interface
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Server implementation
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RMI Registry
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Server stub
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Server Skeleton
Frage 18
Frage
Which is not a valid operator in Java?
Antworten
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<>
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=>
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<=
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+=
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!=
Frage 19
Frage
Which of the following is not an Applet method?
Antworten
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start()
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init()
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run()
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stop()
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destroy()
Frage 20
Frage
If ClassA extends ClassB, then
Antworten
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ClassA is a superclass
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ClassB is a base class
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ClassB is a subclass
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ClassB is a derived class
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ClassA is a base class
Frage 21
Frage
SSL stands for
Antworten
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Secure Server Layer
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Secure Socket Layer
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Server Socket Layer
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Session Service Layer
Frage 22
Frage
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?
Antworten
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doGet
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doPost
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doHref
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servicePost
Frage 23
Frage
Stub is a ____________ proxy for the remote object.
Antworten
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Server side
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Client side
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Both side
-
none of the above
Frage 24
Frage
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");
Antworten
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Same Equals
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Equals
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Same
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The code compiles, but nothing is displayed upon execution.
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The code fails to compile
Frage 25
Frage
Which declaration of the main method below would allow a class to be started as a standalone program.
Antworten
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public static int main(char args[])
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public static void main(String args[])
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public static void main(string args[])
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public static void main(String args)
Frage 26
Frage
Which of these are legal identifiers.
Antworten
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number_1
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number_a
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$1234
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All of the above
Frage 27
Frage
Which of the following are keywords in Java.
Antworten
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implement
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friend
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NULL
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synchronized
Frage 28
Frage
Given a one dimensional array arr, what is the correct way of getting the number of elements in arr.
Antworten
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arr.length
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arr.length - 1
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arr.size
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arr.length()
Frage 29
Frage
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
Antworten
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Method Invocating
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Method Overriding
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Method Labeling
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Method Overloading
Frage 30
Frage
Is this True or False. In Java an abstract class cannot be sub-classed.
Antworten
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True
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False
Frage 31
Frage
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.
Antworten
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"xa"
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"am"
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"xm"
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"xamp"
Frage 32
Frage
What is the result of evaluating the expression 14 ^ 23. Select the one correct answer.
Antworten
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23
-
24
-
25
-
26
Frage 33
Frage
Which of the following is not a return type?
Antworten
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boolean
-
void
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public
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Button
Frage 34
Frage
Which operator is used to perform bitwise exclusive or.
Antworten
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&
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^
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|
-
!
Frage 35
Frage
If result = 2 + 3 * 5, what is the value and type of result variable?
Antworten
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17, byte
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25, byte
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17, int
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25, int
Frage 36
Frage
All the wrapper classes (Integer, Boolean, Float, Short, Long, Double and Character) in java
Antworten
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are final
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are private
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are serializable
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are immutatable
Frage 37
Frage
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);
}
}
Antworten
-
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;
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The program compiles and runs printing 1.
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The program compiles and runs printing 2.
Frage 38
Frage
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
Antworten
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a,d,f
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a,e,f
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d,e,f
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d,a,e
Frage 39
Frage
When we go for thread synchronization?
Antworten
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to remove the lock on the thread
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when there is a single thread
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to make a thread in sleep mode
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when we want to prevent any other multiple thread to act an same object
Frage 40
Frage
Which statement is true?
public void test(int x)
{ int odd = 1;
if(odd)
{ System.out.println("odd"); }
else
{ System.out.println("even"); }
}
Antworten
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"odd" will always be output.
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"even" will always be output.
-
Compilation fails.
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"odd" will be output for odd values of x, and "even" for even values.
Frage 41
Frage
Which code determines the int value data closer to, but not greater than, a double value b?
Antworten
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int data = (int) Math.floor(b);
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int data = (int) Math.abs(b);
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int data = (int) Math.ceil(b);
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int data = (int) Math.min(b);
Frage 42
Frage
Which of the following statements is false as far as different type of statements is concern in JDBC?
Antworten
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Regular Statement
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Interim Statement
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Callable Statement
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Prepared Statement
Frage 43
Frage
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.
Antworten
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1,2,3,4
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1,3,4,2
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2,1,3,4
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4,1,2,3
Frage 44
Frage
Which one not a JDBC interface?
Antworten
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Connection
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Statement
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DriverManager
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ResultSet
Frage 45
Frage
Which one is a correct MySql Driver class name?
Antworten
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com.mysql.jdbc.driver.Driver
-
com.jdbc.mysql.Driver
-
com.mysql.jdbc.Driver
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none of these
Frage 46
Frage
Which one correct JDBC statements?
Antworten
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Statement
-
PreparedStatement
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CallableStatement
-
all of above
Frage 47
Frage
Where the stored procedures reside?
Antworten
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In side server memory
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In side cache
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In side database
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In side browser
Frage 48
Frage
By default cursor pointing to-
Antworten
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Column Header
-
First Record
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Last Record
-
Middle Record
Frage 49
Frage
By default "auto commit" option is -
Antworten
-
true
-
false
Frage 50
Frage
We can get the column names using?
Antworten
-
ResultSetColumnData
-
ResultSetMetaData
-
ResultSetHeaderData
-
ResultSetTableData
Frage 51
Frage
SELECT, INSERT, DELETE, UPDATE, COMMIT and ROLLBACK comes under ?
Antworten
-
DML
-
DDL
-
DCL
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