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.
variable
data structure
main()
real-world modeling

2. Must be added to all input methods for them to work
outside entity
main()
throws IOException
data structure

3. Data structure storage that describes physical entities external to the computer. Accessed by a programs user.
object
class
throws IOException
real-world storage data

4. 5 data types - BLASH: binary trees - _______ - arrays - stacks - hash tables
data structure
new
linked lists
main()

5. The constructor has the same name as the ______ it resides in.
programmer's tools
class
real-world modeling
throws IOException

6. Invoking a method for a specific object.
real-world modeling
object.method();
class
outside entity

7. A software bundle of variables and related methods.
class
object
outside entity
variable

8. A blueprint that defines an objects variables and methods.
real-world modeling
methods
instance
class

9. Execution of the program starts here
main()
class
data structure
charAt()

10. Data structures that directly model real-world situations...think graphs.
constructor
real-world storage data
real-world modeling
parse.Int()

11. A field of method that is private can only be accessed by _________ that are apart of the same class.
algorithms
charAt()
methods
constructor

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

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

14. A special method that is called automatically whenever a new object is created. It prepares the object for use.
programmer's tools
outside entity
constructor
instance

15. An object is often referred to as _____ of a class.
real-world modeling
instance
objects methods
object.method();

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

17. This keyword creates a new object in Java.
new
charAt()
algorithms
object

18. Manipulate the data in data structures in various ways such as sorting.
outside entity
constructor
algorithms
class

19. Returns a character at the specific position in the string object.
class
charAt()
variable
outside entity

20. Converts the string type into an integer.
parse.Int()
object.method();
charAt()
linked lists

21. Other parts of your program interact with objects by interacting with an __________
variable
objects methods
object
linked lists