Question 1

Which of the following println statements will display the last myScores element in an array of 10?

Accepted Answer

A)  System.out.println(vals[0]); 
B)  System.out.println(vals[1]); 
C)  System.out.println(vals[9]); 
D)  System.out.println(vals[10]); 
A)  System.out.println(vals[0]); 
B)  System.out.println(vals[1]); 
C)  System.out.println(vals[9]); 
D)  System.out.println(vals[10]); C

Question 2

When using an array with all elements used, why would a programmer use a loop control variable from 0 to one less than the size of the array? Give an example.

Accepted Answer

When an application contains an array and you want to use every element of the array in some task, it is common to perform loops that vary the loop control variable from 0 to one less than the size of the array. For example, if you get input values for the elements in the array, alter every value in the array, sum all the values in the array, or display every element in the array, you need to perform a loop that executes the same number of times as there are elements.

Question 3

When working with arrays, why is it beneficial to use a loop with a declared symbolic constant equal to the size of the array?

Accepted Answer

It is convenient to declare a symbolic constant equal to the size of the array and use the symbolic constant as a limiting value in every loop that processes the array. That way, if the array size changes in the future, you need to modify only the value stored in the symbolic constant, and you do not need to search for and modify the limiting value in every loop that processes the array.

Question 4

When you create an array variable, memory space is automatically reserved.

Accepted Answer

A) True 
 B)False

Question 5

When any primitive type is passed to a method, the ____________________ is passed.

Accepted Answer

The answer of When any primitive type is passed to...

Question 6

Match each term with the correct statement below.
-Hold memory addresses where values are stored

Accepted Answer

A) array variable 
B) reference type 
C) elements 
D) int 
E) Java object names
F)length
G)foreach loop
H)reference types
I)return 
A) array variable 
B) reference type 
C) elements 
D) int 
E) Java object names
F)length
G)foreach loop
H)reference types
I)return

Question 7

When a method returns an array reference, you include ____ with the return type in the method header.

Accepted Answer

A)  { } 
B)  ( ) 
C)   
D)  [ ] 
A)  { } 
B)  ( ) 
C)   
D)  [ ]

Question 8

It is a good programming practice to ensure that a subscript to an array does not fall below zero, causing a(n) ____.

Accepted Answer

A)  array dump 
B)  runtime error 
C)  conundrum 
D)  compiling error 
A)  array dump 
B)  runtime error 
C)  conundrum 
D)  compiling error

Question 9

In Java, boolean array elements automatically are assigned the value ____.

Accepted Answer

A)  null 
B)  '\u0000' 
C)  true 
D)  false 
A)  null 
B)  '\u0000' 
C)  true 
D)  false

Question 10

Many programmers feel that breaking out of a for loop early disrupts the loop flow and makes the code harder to understand.

Accepted Answer

A) True 
 B)False

Question 11

When you create an array of objects, each reference is assigned the value ____.

Accepted Answer

A)  null 
B)  '\u0000' 
C)  true 
D)  false 
A)  null 
B)  '\u0000' 
C)  true 
D)  false

Question 12

In which of the following statements is the value of myVals null?

Accepted Answer

A)  int myVals = "" 
B)  int [] myVals; 
C)  myVals = int[null] 
D)  int[null] = myVals 
A)  int myVals = "" 
B)  int [] myVals; 
C)  myVals = int[null] 
D)  int[null] = myVals

Question 13

public class CostArray
{
public static void main(String[] args)
{
double[] costs = new double[3];
costs[0] = 5.00;
costs[1] = 7.00;
costs[2] = 9.00;
System.out.println(costs[3]);
}
}
Once the above code is compiled and executed, an error message is generated. Explain the error message that will result and explain the reason for the error.

Accepted Answer

An out-of-bounds error is generated when

Question 14

When returning an array reference, square brackets are included with the return type in the method header.

Accepted Answer

A) True 
 B)False

Question 15

What is different about passing an array to a method rather than passing a primitive type to a method?

Accepted Answer

The outcome is quite different when you

Question 16

A ____ array is one with the same number of elements as another, and for which the values in corresponding elements are related.

Accepted Answer

A)  cloned 
B)  parallel 
C)  property 
D)  two-dimensional 
A)  cloned 
B)  parallel 
C)  property 
D)  two-dimensional

Question 17

An instance variable or object field is also called a(n) ____________________ of the object.

Accepted Answer

The answer of An instance variable or object field is...

Question 18

Match each term with the correct statement below.
-A primitive type

Accepted Answer

A) array variable 
B) reference type 
C) elements 
D) int 
E) Java object names
F)length
G)foreach loop
H)reference types
I)return 
A) array variable 
B) reference type 
C) elements 
D) int 
E) Java object names
F)length
G)foreach loop
H)reference types
I)return

Question 19

How would a programmer perform a range match when writing an application that takes into consideration different discount rates for customers? Give an example.

Accepted Answer

Create two corresponding arrays and perf

Question 20

When any ____ type (boolean, char, byte, short, int, long, float, or double) is passed to a method, the value is passed.

Accepted Answer

A)  array 
B)  dummy 
C)  element 
D)  primitive 
A)  array 
B)  dummy 
C)  element 
D)  primitive

Which of the following println statements will display the last myScores element in an array of 10?

When using an array with all elements used, why would a programmer use a loop control variable from 0 to one less than the size of the array? Give an example.

When working with arrays, why is it beneficial to use a loop with a declared symbolic constant equal to the size of the array?

When you create an array variable, memory space is automatically reserved.

When any primitive type is passed to a method, the ____________________ is passed.

Match each term with the correct statement below. -Hold memory addresses where values are stored

When a method returns an array reference, you include ____ with the return type in the method header.

It is a good programming practice to ensure that a subscript to an array does not fall below zero, causing a(n) ____.

In Java, boolean array elements automatically are assigned the value ____.

Many programmers feel that breaking out of a for loop early disrupts the loop flow and makes the code harder to understand.

When you create an array of objects, each reference is assigned the value ____.

In which of the following statements is the value of myVals null?

When returning an array reference, square brackets are included with the return type in the method header.

What is different about passing an array to a method rather than passing a primitive type to a method?

A ____ array is one with the same number of elements as another, and for which the values in corresponding elements are related.

An instance variable or object field is also called a(n) ____________________ of the object.

Match each term with the correct statement below. -A primitive type

How would a programmer perform a range match when writing an application that takes into consideration different discount rates for customers? Give an example.

When any ____ type (boolean, char, byte, short, int, long, float, or double) is passed to a method, the value is passed.

Creating Java Programs

Using Data

Using Methods, Classes, and Objects

More Object Concepts

Making Decisions

Looping

Characters, Strings, and the Stringbuilder

Advanced Array Concepts

Introduction to Inheritance

Advanced Inheritance Concepts

Exception Handling

File Input and Output

Introduction to Swing Components

Advanced Gui Topics

Graphics

Applets, Images, and Sound

Filters

Exam 8: Arrays

Which of the following println statements will display the last myScores element in an array of 10?

When using an array with all elements used, why would a programmer use a loop control variable from 0 to one less than the size of the array? Give an example.

When working with arrays, why is it beneficial to use a loop with a declared symbolic constant equal to the size of the array?

When you create an array variable, memory space is automatically reserved.

When any primitive type is passed to a method, the ____________________ is passed.

Match each term with the correct statement below. -Hold memory addresses where values are stored

When a method returns an array reference, you include ____ with the return type in the method header.

It is a good programming practice to ensure that a subscript to an array does not fall below zero, causing a(n) ____.

In Java, boolean array elements automatically are assigned the value ____.

Many programmers feel that breaking out of a for loop early disrupts the loop flow and makes the code harder to understand.

When you create an array of objects, each reference is assigned the value ____.

In which of the following statements is the value of myVals null?

When returning an array reference, square brackets are included with the return type in the method header.

What is different about passing an array to a method rather than passing a primitive type to a method?

A ____ array is one with the same number of elements as another, and for which the values in corresponding elements are related.

An instance variable or object field is also called a(n) ____________________ of the object.

Match each term with the correct statement below. -A primitive type

How would a programmer perform a range match when writing an application that takes into consideration different discount rates for customers? Give an example.

When any ____ type (boolean, char, byte, short, int, long, float, or double) is passed to a method, the value is passed.

Creating Java Programs

Using Data

Using Methods, Classes, and Objects

More Object Concepts

Making Decisions

Looping

Characters, Strings, and the Stringbuilder

Advanced Array Concepts

Introduction to Inheritance

Advanced Inheritance Concepts

Exception Handling

File Input and Output

Introduction to Swing Components

Advanced Gui Topics

Graphics

Applets, Images, and Sound

Filters