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. This keyword creates a new object in Java.
methods
main()
new
outside entity

2. Invoking a method for a specific object.
real-world storage data
object.method();
main()
class

3. An arrangement of data inside a computers memory or a disk.
real-world modeling
variable
data structure
constructor

4. Data structure storage that describes physical entities external to the computer. Accessed by a programs user.
outside entity
real-world storage data
methods
linked lists

5. 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.
variable
methods
instance
constructor

6. A special method that is called automatically whenever a new object is created. It prepares the object for use.
real-world modeling
methods
constructor
parse.Int()

7. Data structures that directly model real-world situations...think graphs.
object
real-world modeling
real-world storage data
algorithms

8. A software bundle of variables and related methods.
real-world modeling
variable
object
class

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

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10. Other parts of your program interact with objects by interacting with an __________
objects methods
programmer's tools
data structure
algorithms

11. An object is often referred to as _____ of a class.
real-world storage data
instance
methods
new

12. Any ___________ that wants to access data in a class can do so by using a method of that class.
algorithms
main()
real-world modeling
outside entity

13. A blueprint that defines an objects variables and methods.
class
algorithms
throws IOException
main()

14. Converts the string type into an integer.
object
parse.Int()
objects methods
constructor

15. Manipulate the data in data structures in various ways such as sorting.
algorithms
main()
throws IOException
new

16. 5 data types - BLASH: binary trees - _______ - arrays - stacks - hash tables
class
object
linked lists
throws IOException

17. Returns a character at the specific position in the string object.
algorithms
outside entity
charAt()
programmer's tools

18. A field of method that is private can only be accessed by _________ that are apart of the same class.
real-world modeling
variable
methods
programmer's tools

19. Must be added to all input methods for them to work
outside entity
objects methods
real-world modeling
throws IOException

20. Execution of the program starts here
linked lists
main()
outside entity
methods

21. The constructor has the same name as the ______ it resides in.
outside entity
constructor
class
real-world modeling