Quiz Questions

Q. 1 ) Which of the following are true?

A) The Void class extends the Class class

B) The Float class extends the Double class.

C)The System class extends the Runtime class.

D)The Integer class extends the Number class.

E)None Of These

Q. 2 ) Exceptions can be caught or rethrown to a calling method.

A)True

B)False

C)

D)

E)

Q. 3 ) Because finalize () belongs to the java.lang.Object class, it is present in all ___.

A)objects

B)classes

C)methods

D)

E)

Q. 4 ) The this reference is used in conjunction with ___methods.

A)static

B)non-static

C)

D)

E)

Q. 5 ) Which of the following statements can be used to describe a public method?

A)It is accessible to all other classes in the hierarchy

B)It is accessablde only to subclasses of its parent class

C)It represents the public interface of its class

D)The only way to gain access to this method is by calling one of the public class methods

E)Both A,C

Q. 6 ) The switch statement does not require a break.

A)True

B)False

C)

D)

E)

Q. 7 ) Character literals are stored as unicode characters.

A)True

B)False

C)

D)

E)

Q. 8 ) Strings are instances of the class String.

A)True

B)False

C)

D)

E)

Q. 9 ) What is default layout manager for panels and applets?

A)Flowlayout

B)Gridlayout

C)BorderLayout

D)

E)

Q. 10 ) Which one of the following does not extends java.awt.Component

A) CheckBox

B)Canvas

C)CheckbocGroup

D)Label

E)

Q. 11 ) Which one does not have a valueOf(String) method

A)Integer

B)Boolean

C)Character

D)Long

E)Short

Q. 12 ) Which of the following are Java reserved words? 1. run 2. import 3. default 4. implement

A)1 and 2

B)2 and 3

C)3 and 4

D)2 and 4

E)1,2,3 and 4

Q. 13 ) You need to store elements in a collection that guarantees that no duplicates are stored. Which one of the following interfaces provide that capability?

A)Java.util.Map

B)Java.util.List

C)Java.util.Collection

D)None of the above

E)

Q. 14 ) What allows the programmer to destroy an object x?

A)x.delete()

B)x.finalize()

C)Runtime.getRuntime().gc()

D)Only the garbage collection system can destroy an object.

E)

Q. 15 ) Which of the following are valid calls to Math.max? 1. Math.max(1,4) 2. Math.max(2.3, 5) 3. Math.max(1, 3, 5, 7) 4. Math.max(-1.5, -2.8f)

A)1, 2 and 4

B)2, 3 and 4

C)1, 2 and 3

D)2, 3 and 4

E)

Q. 16 ) Which will contain the body of the thread?

A)run();

B)start();

C)stop();

D)main();

E)

Q. 17 ) Which two of the following methods are defined in class Thread? 1. start() 2. wait() 3. notify() 4. run() 5. terminate()

A)1 and 4

B)2 and 3

C)3 and 4

D)2 and 4

E)

Q. 18 ) Which is true about a method-local inner class?

A)It must be marked final.

B)It can be marked abstract.

C)It can be marked public.

D)It can be marked static.

E)

Q. 19 ) What is the numerical range of a char?

A)-128 to 127

B)-215to 215

C)0 to 32767

D)0 to 65535

E)

Q. 20 ) Which is a valid keyword in java?

A)unsigned

B)interface

C)string

D)Float

E)