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4

Which of the following control expressions are valid for an if statement?

A. an integer expression

B. a Boolean expression

C. either A or B

D. Neither A or B

Correct Answer :

B. a Boolean expression


Related Questions

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4

What is java -g used for?

A. Using the jdb tool

B. Executing a class with optimization turned off

C. To provided information about deprecated methods

D. Non of the above

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4

Java is fully object oriented programme.

A. true

B. false

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4

All the bitwise operators have the same level of precedence in Java.

A. True

B. False

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4

The programmer must explicitly create the system .in and system .out objects.

A. True

B. False

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4

The import statement is always the first no comment statement in a Java program files.

A. True

B. False

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4

Which of the following methods can be used to change the size of a
size() *
resize()

A. component

B. dimension()

C. setSize()

D. size()

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4

One the features of is that an array can store many different types of values.

A. True

B. False

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4

Which of the following string can be used as mode string for creating a RandomAccessFile object?

A. "rw"

B. "wr"

C. "0"

D. 'w''

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4

Message-Driven beans act as a listener for the Java Message Service API, processing messages synchronously

A. True

B. False

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4

The default case is always required in the switch selection structure.

A. True

B. False

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4

DriverManager.getConnection("jdbc:odbc:dsn_name") method does not depend on the class.forName(...) method.

A. True.

B. False.

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4

The break statement is required in the default case of a switch selection structure.

A. True

B. False

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4

When we implement the Runnable interface, we must define the method

A. start()

B. init()

C. runnable()

D. run()

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4

Which of the following will produce a value of 22 if x=22.9:

A. Ceil(x)

B. Round(x)

C. Rint(x)

D. Abs(x)

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4

JSP files creates ________________

A. html files

B. html files and java files

C. java files and class files

D. None of the above.

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4

Which of the following methods can be used to remove a component from the display?

A. remove()

B. desappear()

C. hide()

D. move()

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4

The use of protected keyword to a member in a class will restrict its visibility as follows:

A. Visibility only in the class and its subclasses in the same package.

B. Visibility only inside the same package.

C. Visibility in all classes in the same package and subclasses in other packages.

D. Visibility only in the class where it is declared.

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4

A Java monitor must either extend thread class or implement Runnable interface.

A. True

B. False

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4

Given the code
String s = new String("abc");
Which of the following calls are valid?

A. s.toUpperCase()

B. s.append("xyz")

C. s.setCharAt(1<'A')

D. all of the above

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4

The keywords reserved but not used in the initial version of Java re:

A. Synchronized

B. Boolean

C. union

D. goto

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4

The methods wait() and noify() are defined in

A. java.lang.Thread

B. java.lang.Runnable

C. java.lang.Object

D. java.lang.ThreadGroup

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4

If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.

A. True

B. False

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4

Which of the following represent legal flow control statements?

A. break;

B. break();

C. continue(inner);

D. all of the above

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4

A static class method can be invoked by simply using the name of the method alone.

A. True

B. False

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4

The expression (x == y && a<b) is true If either x == y is true or a<b is true.

A. True

B. False

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4

It is perfectly legal to refer to any instance variable inside of a static method.

A. True

B. False

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4

A method declared as static can not access non-static class members.

A. True

B. False

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4

Give file is a file object, which of the following are legal statements to create a new file.

A. file.create();

B. FileOutputStream fos=new FileOutputStream(file);

C. FileInputStream fis=new FileInputStream(file);

D. all of the above

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4

With javadoc, which of the following denotes a javadoc comment?

A. //#

B. /*

C. /**

D. //**

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4

Which of the following control expressions are valid for an if statement?

A. an integer expression

B. a Boolean expression

C. either A or B

D. Neither A or B