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

2. Returns a character at the specific position in the string object.
methods
instance
charAt()
constructor

3. A field of method that is private can only be accessed by _________ that are apart of the same class.
constructor
object
main()
methods

4. 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.
class
class
variable
instance

5. This keyword creates a new object in Java.
throws IOException
linked lists
new
programmer's tools

6. Converts the string type into an integer.
instance
linked lists
parse.Int()
throws IOException

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

8. An object is often referred to as _____ of a class.
instance
outside entity
class
main()

9. A software bundle of variables and related methods.
outside entity
parse.Int()
object
programmer's tools

10. Must be added to all input methods for them to work
object.method();
throws IOException
programmer's tools
data structure

11. Execution of the program starts here
object.method();
programmer's tools
main()
class

12. Any ___________ that wants to access data in a class can do so by using a method of that class.
outside entity
object
programmer's tools
real-world modeling

13. A blueprint that defines an objects variables and methods.
programmer's tools
class
real-world modeling
variable

14. The constructor has the same name as the ______ it resides in.
charAt()
data structure
class
throws IOException

15. Data structure storage that describes physical entities external to the computer. Accessed by a programs user.
outside entity
real-world storage data
linked lists
object.method();

16. An arrangement of data inside a computers memory or a disk.
data structure
charAt()
object.method();
real-world storage data

17. Invoking a method for a specific object.
variable
main()
linked lists
object.method();

18. A special method that is called automatically whenever a new object is created. It prepares the object for use.
class
linked lists
charAt()
constructor

19. Other parts of your program interact with objects by interacting with an __________
main()
objects methods
parse.Int()
data structure

20. Manipulate the data in data structures in various ways such as sorting.
programmer's tools
algorithms
linked lists
charAt()

21. 5 data types - BLASH: binary trees - _______ - arrays - stacks - hash tables
programmer's tools
object.method();
linked lists
objects methods