Which of the following keywords are used to control access to a class member?
default
protected
interface
None of the above
Correct Answer :
B. protected
Related Questions
JSP files creates ________________
html files
html files and java files
java files and class files
None of the above.
It is an error if a class with one or more abstract methods is not explicitly declared abstract.
True
False
In order to connect to a database through java program we must create _______-
Connection, Statement, ResultSet
Connection, ResultSet
Statement< ResultSet
Connection, Statement
executeUpdate(------------) returns ___________
Nothing
Returns a ResultSet object
Returns an integer value to show the no. of updated rows
None of the above.
Consider the following code snippet:
try
{
int x=0; int y=50/x;
System.out.println("Division by zero");
}
catch(ArithmeticException e)
{
System.out.println("catch block");
}
What will be the output?
{
int x=0; int y=50/x;
System.out.println("Division by zero");
}
catch(ArithmeticException e)
{
System.out.println("catch block");
}
Error. Won't compile
Division by zero
Catch block
Division by zero catch block
executeUpdate automatically updates data because___________
auto commit is on, by default
It performs a hidden commit statement as well
Does not commit
None of the above.
A class may be both abstract and final.
True
False
An individual array element that is passed to a method and modified in that method will contain the modified value when the called method completes execution.
True
False
A catch can have comma-separated multiple arguments.
True
False
Consider the following statements:
int x = 10, y = 15;
x = ((x < y) ? (y + x) : (y - x);
What will be the value of x after executing these statements?
x = ((x < y) ? (y + x) : (y - x);
25
15
5
Error can't be executed.
Which of the following classes are available in the java.lang package?
Random
Stack
String Buffer
Vector
A Java monitor must either extend thread class or implement Runnable interface.
True
False
In a single Servlet class we can use____________
doGet(...) method only
doPost(...) method only
doGet(...) method and doPost(...) method both at a time.
Either 'a' or 'b'
A JSP file can be stored_________________
With the extension .jsp in servlets folder of the jws
With the extension .html in public_html folder of the jws
With the extension .jsp in public_html folder of the jws
None of the above.
The name of a Java program file must match the name of the class with the extension Java.
True
False
Which are the valid ways to create DataInputStream streams?
new DataInputStream(new File("in.dat"));
new DataInputStream(new FileInputStream("in.dat"));
new DataInputStream("in.dat");
new DataInputStream("in.data","r");
Every method of a final in class is implicitly final.
True
False
Which of the following string can be used as mode string for creating a RandomAccessFile object?
"rw"
"wr"
"0"
'w''
In RMI before running the client program we must start RMI Registry.
True.
False.
DataInput is
An abstract class defined is java.io.
A class we can use to read primitive data types.
An interface that defines methods to open files.
An interface that defines methods to read primitive data types.
Every call to wait has a corresponding call to notify that will eventually end the wafting.
True
False
Which of the following methods can be used to remove a component from the display?
remove()
desappear()
hide()
move()
The default case is always required in the switch selection structure.
True
False
Consider the following class definition.
Class Student extends String
{
}
What happens when we try to compile this class?
Will not compile because class body is not defined
Will not compile because class is not declared public
Will compile successfully.
Will not compile because String is abstract
The expression (x == y && a<b) is true If either x == y is true or a<b is true.
True
False
One the features of is that an array can store many different types of values.
True
False
When the string objects are compared with ==, the result is true If the strings contain the same values.
True
False
The length of a string object 's1' can be obtained using the expression s1.length.
True
False
Submit button always fires doPost(...)
True
False
Which of the following will produce a value of 22 if x=22.9:
Ceil(x)
Round(x)
Rint(x)
Abs(x)