Cs170 Cumulative Final

Front 1

If your Java source code program showns no "yellow error message" when you click the compile button in DrJava, you can be sure that it contains no

Back 1

syntax Errors

Front 2

A megabyte is roughly

Back 2

1000 (or 1024) kilobytes

Front 3

All data must be brought into ____ before a program can manipulate it.

Back 3

main memory

Front 4

Which one of the following memory types provides storage that persists without electricity?

Back 4

secondary storage

Front 5

In the DrJava IDE, the editor you will use when you create the source code for your Java programs is contained in the:

Back 5

Definitions pane

Front 6

Consider the following statements regarding computers:
--
I. Computers can execute a large number of instructions in a fraction of a second.
II. Computer application areas mainly target the research and scientific communities.
III. The physical components of a computer constitute its hardware.
IV. Unlike humans, a computer never gets bored or exhausted on performing repetitive tasks.

Which one of the following options is correct?

Back 6

I, III, and IV

Front 7

A user interface that you can manipulate using different visual components is called a:

Back 7

GUI or graphical user interface

Front 8

To lessen the burden of repetition, and to increase productivity, programmers create ______________ of code that perform common tasks.

Back 8

libraries

Front 9

In a main method definition, the word void is called:

Back 9

method return type

Front 10

The person who invented the stored program concept, that is, the idea of controlling an electronic computer using instructions stored in memory, was _____________________

Back 10

John Von Neuman

Front 11

The object System.out is a(n) ______________ of the class PrintStream.

Back 11

instance

Front 12

The class body is where the _______________ and _________________ are defined.

Back 12

attributes and methods

Front 13

Java identifiers must:

Back 13

start with a letter or an underscore

Front 14

One of the first high-level programming languages was designed to allow bankers and clerks to write programs to process checks and accounts in businesses. That language was named

Back 14

COBOL

Front 15

When use a method name to perform a predefined set of actions, we say you are _____________ a method.

Back 15

invoking

Front 16

Variables created outside of a method are officially called ________________.

Back 16

fields

Front 17

Often, when writing a program, a single grammar mistake will lead the compiler to produce a series of misleading error messages. The lesson calls these ________________ errors.

Back 17

cascading errors

Front 18

The Syntax Errors section lists several categories of compile-time errors. Trying to use a real or floating-point number when an integer or whole number is required, is an example of a:

Back 18

type error

Front 19

________________ methods are designed to accomplish a single, simple task, and help to make your programs more flexible and easier to understand.

Back 19

User Defined

Front 20

The strategy of iterative development, where you make simple changes (so you don't get confused), and then make additional changes as needed is called:

Back 20

step-wise refinement

Front 21

Developing a program by simply listing the individual steps you want to take inside the main method (before writing the details needed to carry out the actions) is known as __________________.

Back 21

top down design

Front 22

A _______________ consists of a variable type, followed by a variable name. When defining your method, each one must have its own type.

Back 22

formal parameter

Front 23

What is created for each input parameter when a method is called?

Back 23

parameter variable

Front 24

Which of the following must be provided when defining a method?

Back 24

A name for the method, a name and type for each parameter, and a type for the return value

Front 25

Which of the following words indicates an object’s reference to itself?

Back 25

this

Front 26

How many constructors can a class have?

Back 26

any number

Front 27

The (invisible) reference to an object that is passed to every object’s instance methods is called the ____.

Back 27

this reference

Front 28

You are ____ required to write a constructor method for a class.

Back 28

never

Front 29

When is a finally{} block executed?

Back 29

Always after the execution of a try block, regardless of whether or not an exception is thrown

Front 30

Which class of exceptions is NOT checked?

Back 30

RuntimeExceptions

Front 31

The compiler determines which version of a method to call by the method’s ____.

Back 31

signature

Front 32

The toString() method is automatically inherited from the __________________ class.

Back 32

object

Front 33

Constructor chaining means that:

Back 33

subclass constructors call super class constructors.

Front 34

Assume that you have an ArrayList variable named a containing 4 elements, and an object named element that is the correct type to be stored in the ArrayList. Which of these statements replaces the first object in the collection with element?

Back 34

a.set(element, 0);

Front 35

Assume that you have an ArrayList variable named a containing 4 elements, and an object named element that is the correct type to be stored in the ArrayList. Which of these statements assigns the first object in the collection to the variable element?

Back 35

element = a.get(0);

Front 36

The members of an enumerated type are _______________.

Back 36

constants

Front 37

Implementation inheritance is also known as __________________________:

Back 37

contraction

Front 38

The ____________ relationship occurs when members of one class form a subset of another class, like the Animal, Mammal, Rodent example we discussed in the online lessons.

Back 38

composition

Front 39

___________________ is one of the primary mechanisms that we use to understand the natural world around us. Starting as infants we begin to recognize the difference between categories like food, toys, pets, and people. As we mature, we learn to divide these general categories or classes into subcategories like siblings and parents, vegetables and dessert.

Back 39

classification