Test your basic knowledge |

Data Structures And Algorithms Java

Subject : it-skills

Instructions:

Answer 21 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. To create an object in Java you must do two things: 1. Use the keyword "new" 2. Store a reference to the object in a ______ that is the same type as the class.
data structure
linked lists
object.method();
variable

2. Converts the string type into an integer.
methods
new
parse.Int()
data structure

3. Returns a character at the specific position in the string object.
class
data structure
charAt()
object

4. A blueprint that defines an objects variables and methods.
programmer's tools
throws IOException
main()
class

5. Manipulate the data in data structures in various ways such as sorting.
programmer's tools
objects methods
throws IOException
algorithms

6. An arrangement of data inside a computers memory or a disk.
methods
algorithms
data structure
instance

7. The constructor has the same name as the ______ it resides in.
programmer's tools
methods
object.method();
class

8. 5 data types - BLASH: binary trees - _______ - arrays - stacks - hash tables
class
linked lists
data structure
real-world modeling

9. Execution of the program starts here
instance
main()
methods
programmer's tools

10. This keyword creates a new object in Java.
new
instance
class
objects methods

11. Any ___________ that wants to access data in a class can do so by using a method of that class.
throws IOException
main()
object.method();
outside entity

12. An object is often referred to as _____ of a class.
data structure
real-world modeling
instance
new

13. Invoking a method for a specific object.
object.method();
instance
real-world modeling
class

14. A field of method that is private can only be accessed by _________ that are apart of the same class.
outside entity
throws IOException
methods
object.method();

15. Must be added to all input methods for them to work
class
programmer's tools
parse.Int()
throws IOException

16. A software bundle of variables and related methods.
object
data structure
main()
real-world storage data

17. A special method that is called automatically whenever a new object is created. It prepares the object for use.
main()
new
constructor
throws IOException

18. Data structure storage that describes physical entities external to the computer. Accessed by a programs user.
methods
main()
outside entity
real-world storage data

19. Data structures that directly model real-world situations...think graphs.
class
data structure
instance
real-world modeling

20. Data structure storage that is accessed by the program itself. Ex - stacks and queues.

21. Other parts of your program interact with objects by interacting with an __________
algorithms
real-world storage data
methods
objects methods