Questions Chapter 1

Question 1

In many data structures you can _______ a single record, ________ it, and _________ it.

Answer 1

input, search, delete.

Question 2

Rearranging the contents of a data structure into a certain order is called _______.

Answer 2

sorting

Question 3

In a database, a field is:

a. specific data item
b. a specific object
c. part of a record
d. part of an algorithm

Answer 3

part of the record

Question 4

The field used when searching for a particular record is the _________ _______.

Answer 4

search key

Question 5

In object-oriented programming, an object:

a. is a class
b. may contain data and methods
c. is a program
d. part of an algorithm

Answer 5

may contain data and methods

Question 6

A class:

a. is a blueprint for many objects
b. may contain data and methods
c. is a program
d. may contain classes

Answer 6

is a blueprint for many objects

Question 7

In Java, a class specification:

a. creates objects
b. requires the keyword new
c. creates references
d. none of the above

Answer 7

none of the above

Question 8

When an object wants to do something, it uses a _________.

Answer 8

method

Question 9

In Java, accessing an object’s methods requires the ____ operator.

Answer 9

dot

Question 10

In Java, boolean and byte are __________ ________ __________.

Answer 10

primitive data types

Question 11

a data structure is:

Answer 11

the organization of data in a computer’s memory or in a disk file.

Question 12

a key is:

Answer 12

a field in a record that’s used to carry out some operation on the data.