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This module contains review questions and answers keyed to the module titled Java4210: Getting Started with Generics

Revised: Wed May 11 17:31:29 CDT 2016

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This module contains review questions and answers keyed to the module titled Java4210: Getting Started with Generics .

The questions and the answers are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back again.


Question 1 .

True or False: When Java version 1.5 was released, it contained many new language features, including:

  • Generics
  • Enhanced for Loop
  • Autoboxing/Unboxing
  • Collections
  • Typesafe Enums
  • Varargs
  • Static Import
  • Metadata

Answer 1

Question 2

True or False: Using Java version1.7, the code shown in Listing 1 will compile without warnings, errors, or other messages being generated by thecompiler.

Listing 1 - Question 2
/*File Q02.java ************************************************/import java.util.*; public class Q02{ArrayList var1 = new ArrayList();void runIt(){ var1.add(new Date());//Note the required cast in the following // statement.System.out.println( ((Date)var1.get(0)).getTime());}//runIt public static void main(String[]args){ new Q02().runIt();}//end main}//end class Q02 //=============================================//

Answer 2

Question 3

Generics was introduced in Java v1.5 to provide which of the following:

  • A. Code simplicity
  • B. Compile-time type safety
  • C. A clear and straightforward code syntax.
  • D. None of the above.

Answer 3

Question 4

True or False: The use of generics is limited to the Java Collections framework.

Answer 4

Question 5

True or False: The Java v1.7 compiler produces an error message when an attempt is made to compile the code shown in Listing 1 .

Answer 5

Question 6

True or False: When the code in Listing 1 is compiled using the -Xlint:unchecked switch with Java v1.7, the compiler produces:

  • A. An error message
  • B. A warning
  • C. None of the above

Answer 6

Question 7

True or False: The program code shown in Listing 2 will compile and execute successfully to produce an output similar to that shownin Figure 1 .

Listing 2 - Question 7.
/*File Q07.java ************************************************/import java.util.*; public class Q07{ArrayList var1 = new ArrayList();void runIt(){ var1.add(new Date());System.out.println( (var1.get(0)).getTime());}//runIt public static void main(String[]args){ new Q07().runIt();}//end main}//end class Q07 //=============================================//
Figure 1 - Question 7.

Answer 7

Question 8

What modification must be made to the code shown in Listing 2 to cause it to compile and execute successfully?

Questions & Answers

what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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