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. An object is often referred to as _____ of a class.
parse.Int()
variable
instance
methods

2. A software bundle of variables and related methods.
object
new
charAt()
parse.Int()

3. A field of method that is private can only be accessed by _________ that are apart of the same class.
class
throws IOException
methods
instance

4. This keyword creates a new object in Java.
constructor
objects methods
programmer's tools
new

5. Converts the string type into an integer.
main()
parse.Int()
class
variable

6. Returns a character at the specific position in the string object.
variable
main()
charAt()
programmer's tools

7. Data structure storage that describes physical entities external to the computer. Accessed by a programs user.
class
real-world modeling
real-world storage data
main()

8. A blueprint that defines an objects variables and methods.
methods
class
variable
outside entity

9. Execution of the program starts here
main()
charAt()
object.method();
object

10. The constructor has the same name as the ______ it resides in.
objects methods
class
parse.Int()
object

11. Must be added to all input methods for them to work
parse.Int()
throws IOException
class
object

12. Other parts of your program interact with objects by interacting with an __________
outside entity
programmer's tools
objects methods
throws IOException

13. Data structures that directly model real-world situations...think graphs.
algorithms
real-world modeling
methods
instance

14. 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.
outside entity
class
object
variable

15. 5 data types - BLASH: binary trees - _______ - arrays - stacks - hash tables
objects methods
variable
linked lists
instance

16. Manipulate the data in data structures in various ways such as sorting.
object
class
real-world modeling
algorithms

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

18. A special method that is called automatically whenever a new object is created. It prepares the object for use.
instance
objects methods
charAt()
constructor

19. An arrangement of data inside a computers memory or a disk.
real-world modeling
class
data structure
outside entity

20. Invoking a method for a specific object.
outside entity
object.method();
class
class

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