What is the fundamental unit of information of writer streams?
Anonymous Quiz
25%
Characters
33%
Bytes
29%
Files
8%
Records
4%
Information
File class is included in which package?
Anonymous Quiz
36%
java.io package
32%
java.lang package
4%
java.awt package
0%
java.net.package
28%
java.util.package
Given the code
String s1 = ” yes” ; String s2 = ” yes ” ; String s3 = new String ( s1); Which of the following would equate to true?
String s1 = ” yes” ; String s2 = ” yes ” ; String s3 = new String ( s1); Which of the following would equate to true?
Anonymous Quiz
35%
s1 == s2
15%
s1 = s2
35%
s3 == s1
4%
s3=s1
12%
s1!=s2
What is the sequence of major events in the life of an applet?
Anonymous Quiz
23%
init, start, stop, destroy
38%
start, init , stop , destroy
31%
init, start , destroy, stop
4%
init, start, destroy
4%
destroy, start, init, stop
Which of the following is true in regard to applet execution?
(a) Applets loaded from the same computer where they are executing have the same restrictions as applets loaded from the network.
(b) Applets loaded and executing locally have none of the restrictions faced by applets that get loaded from the network.
(c) Applets loaded and executing locally have some restrictions faced by applets that get loaded from the network.
(d) Applets cant react to user input and change dynamically
(e) Applets can be run independently.
(a) Applets loaded from the same computer where they are executing have the same restrictions as applets loaded from the network.
(b) Applets loaded and executing locally have none of the restrictions faced by applets that get loaded from the network.
(c) Applets loaded and executing locally have some restrictions faced by applets that get loaded from the network.
(d) Applets cant react to user input and change dynamically
(e) Applets can be run independently.
What is the return type of the method getID() defined in AWTEvent class
Anonymous Quiz
35%
Int
26%
long
26%
Object
4%
Component
9%
float
Which of the following events will cause a thread to die?
Anonymous Quiz
30%
The method sleep( ) is called
26%
The method wait( ) is called
17%
Execution of the start( ) method ends
22%
Execution of the run( ) method ends
4%
Execution of the run() method is called
Which of the following statements are true regarding the finalize( ) method?
Anonymous Quiz
24%
The finalize ( ) method must be declared with protected accessibility
19%
The compiler will fail to compile the code that explicitly tries to call the finalize( ) method
33%
the finalize ( ) method can only access other objects that are eligible for garbage collection
14%
The finalize ( ) method can be overloaded
10%
The finalize() method cant be overloaded
Which one of these is a valid method declaration?
Anonymous Quiz
5%
void method1
73%
void method2()
14%
void method3(void)
5%
method4()
5%
methods(void)
Given a class named Book, which one of these is a valid constructor declaration for the class?
Anonymous Quiz
35%
Book(Book b) { }
24%
Book Book() { }
12%
private final Book() { }
29%
void Book() { }
0%
abstract Book() { }
public class MyClass {
long var;
public void MyClass(long param) { var = param; } //(1) public static void main(String[] args) { MyClass a,b; a = new MyClass(); //(2) b = new MyClass(5); //(3) } }
long var;
public void MyClass(long param) { var = param; } //(1) public static void main(String[] args) { MyClass a,b; a = new MyClass(); //(2) b = new MyClass(5); //(3) } }
Anonymous Quiz
0%
A compilation ERROR will occur at (1), since constructors cannot specify a return value
29%
A compilation error will occur at (2), since the class does not have a default constructor
57%
compilation error(3)since the class does not have a constructor which takes one argument of type int
7%
The program will compile correctly
7%
The program will compile and execute correctly.
Given the following class, which of these is valid way of referring to the class from outside of the package net.basemaster?
package net.basemaster;
public class Base { // . . . } Select the correct answer
package net.basemaster;
public class Base { // . . . } Select the correct answer
Anonymous Quiz
18%
By simply referring to the class as Base
12%
By simply referring to the class as basemaster.Base
53%
By simply referring to the class as net.basemaster.Base
0%
By simply referring to the class as net.Base
18%
By importing with net.* and referring to the class as basemaster.Base.
Which one of the following class definitions is a valid definition of a class that cannot be instantiated?
Anonymous Quiz
24%
class Ghost { abstract void haunt(); }
29%
abstract class Ghost { void haunt(); }
35%
abstract class Ghost { void haunt() { }; }
6%
abstract Ghost { abstract void haunt(); }
6%
static class Ghost { abstract haunt(); }
Which one of the following class definitions is a valid definition of a class that cannot be extended?
Anonymous Quiz
0%
class Link { }
11%
abstract class Link { }
21%
native class Link { }
16%
static class Link { }
53%
final class Link { }
Given the following definition of a class, which fields are accessible from outside the package
com.corporation.project?
package com.corporation.project; public class MyClass { int i; public int j; protected int k; private int l; }
com.corporation.project?
package com.corporation.project; public class MyClass { int i; public int j; protected int k; private int l; }
Anonymous Quiz
6%
Field i is accessible in all classes in other packages
38%
Field j is accessible in all classes in other packages
25%
Field k is accessible in all classes in other packages
13%
Field l is accessible in all classes in other packages
19%
Field l is accessible in subclasses only in other packages
How restrictive is the default accessibility compared to public, protected, and private accessibility?
Anonymous Quiz
13%
Less restrictive than public
47%
More restrictive than public, but less restrictive than protected
33%
More restrictive than protected, but less restrictive than private
7%
More restrictive than private
Which statement is true about accessibility of members?
Anonymous Quiz
36%
Private members are always accessible from within the same package
36%
Private members can only be accessed by code from within the class of the member
14%
member with default accessibility can be accessed by any subclass of the class in which it is define
7%
Private members cannot be accessed at all
7%
Package/default accessibility for a member can be declared using the keyword default.
Which of the following is true about the use of modifiers?
(a)
If no accessibility modifier (public, protected, and private) is specified for a member declaration, the member is only accessible for classes in the package of its class and subclasses of its class anywhere
(b)
You cannot specify accessibility of local variables. They are only accessible within the block in which they are declared
(c)
Subclasses of a class must reside in the same package as the class they extend
(d)
Local variables can be declared static
(e)
None of the above.
(a)
If no accessibility modifier (public, protected, and private) is specified for a member declaration, the member is only accessible for classes in the package of its class and subclasses of its class anywhere
(b)
You cannot specify accessibility of local variables. They are only accessible within the block in which they are declared
(c)
Subclasses of a class must reside in the same package as the class they extend
(d)
Local variables can be declared static
(e)
None of the above.