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.
class
instance
data structure
variable

2. 5 data types - BLASH: binary trees - _______ - arrays - stacks - hash tables
variable
charAt()
linked lists
new

3. Other parts of your program interact with objects by interacting with an __________
variable
object.method();
objects methods
class

4. This keyword creates a new object in Java.
charAt()
new
methods
variable

5. An arrangement of data inside a computers memory or a disk.
data structure
algorithms
new
real-world modeling

6. A software bundle of variables and related methods.
object
object.method();
objects methods
programmer's tools

7. Returns a character at the specific position in the string object.
variable
instance
main()
charAt()

8. The constructor has the same name as the ______ it resides in.
new
algorithms
outside entity
class

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

10. Data structure storage that describes physical entities external to the computer. Accessed by a programs user.
object.method();
real-world storage data
objects methods
parse.Int()

11. Invoking a method for a specific object.
object.method();
programmer's tools
methods
object

12. A special method that is called automatically whenever a new object is created. It prepares the object for use.
real-world storage data
real-world modeling
constructor
objects methods

13. A blueprint that defines an objects variables and methods.
data structure
objects methods
real-world storage data
class

14. Manipulate the data in data structures in various ways such as sorting.
algorithms
class
methods
charAt()

15. A field of method that is private can only be accessed by _________ that are apart of the same class.
real-world modeling
linked lists
throws IOException
methods

16. Converts the string type into an integer.
throws IOException
new
parse.Int()
methods

17. Must be added to all input methods for them to work
instance
throws IOException
data structure
variable

18. Any ___________ that wants to access data in a class can do so by using a method of that class.
object.method();
programmer's tools
outside entity
parse.Int()

19. Data structures that directly model real-world situations...think graphs.
parse.Int()
real-world modeling
outside entity
constructor

20. Execution of the program starts here
algorithms
parse.Int()
object
main()

21. 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.
real-world modeling
outside entity
variable
constructor