Question 1

Given the following two lines of code, what can be said about s1 and s2? String s1 = "testing" + "123";
String s2 = new String("testing 123");

Accepted Answer

A)  s1 and s2 are both references to the same String object. 
B)  the line declaring s1 is legal in Java; the line declaring s2 will produce a syntax error. 
C)  s1 and s2 are references to different String objects. 
D)  s1 and s2 will compare "equal." 
E)  None of the above 
A)  s1 and s2 are both references to the same String object. 
B)  the line declaring s1 is legal in Java; the line declaring s2 will produce a syntax error. 
C)  s1 and s2 are references to different String objects. 
D)  s1 and s2 will compare "equal." 
E)  None of the above

Question 2

In Java, the symbol "=" and the symbol "==" are used interchangeably.

Accepted Answer

A) True 
 B)False

Question 3

The printf method within System.out is designed to ease the conversion of legacy C code into Java.

Accepted Answer

A) True 
 B)False

Question 4

If you need to import not only the top-level of a package, but all its secondary levels as well, you should use the following:
import package.*.*;

Accepted Answer

A) True 
 B)False

Question 5

Only difficult programming problems require a pseudocode solution before the programmer creates the program itself.

Accepted Answer

A) True 
 B)False

Question 6

Java.text's NumberFormat class includes methods that

Accepted Answer

A)  allow you to format currency 
B)  allow you to format percentages 
C)  round their display during the formatting process 
D)  truncate their display during the formatting process 
E)  A, B, C, but not D 
A)  allow you to format currency 
B)  allow you to format percentages 
C)  round their display during the formatting process 
D)  truncate their display during the formatting process 
E)  A, B, C, but not D

Question 7

The advantages of the DecimalFormat class compared to the NumberFormat class include

Accepted Answer

A)  precise control over the number of digits to be displayed 
B)  control over the presence of a leading zero 
C)  the ability to truncate values rather than round them 
D)  the ability to display a percent sign (%) automatically at the beginning of the display 
E)  only A and B 
A)  precise control over the number of digits to be displayed 
B)  control over the presence of a leading zero 
C)  the ability to truncate values rather than round them 
D)  the ability to display a percent sign (%) automatically at the beginning of the display 
E)  only A and B

Question 8

In Java, instantiation means

Accepted Answer

A)  noticing the first time something is used 
B)  creating a new object of the class 
C)  creating a new alias for an existing object 
D)  launching a method 
E)  none of these 
A)  noticing the first time something is used 
B)  creating a new object of the class 
C)  creating a new alias for an existing object 
D)  launching a method 
E)  none of these

Question 9

When comparing any primitive type of variable, the == operator should always be used to test if two values are equal.

Accepted Answer

A) True 
 B)False

Given the following two lines of code, what can be said about s1 and s2? String s1 = "testing" + "123"; String s2 = new String("testing 123");

In Java, the symbol "=" and the symbol "==" are used interchangeably.

The printf method within System.out is designed to ease the conversion of legacy C code into Java.

If you need to import not only the top-level of a package, but all its secondary levels as well, you should use the following: import package..;

Only difficult programming problems require a pseudocode solution before the programmer creates the program itself.

Java.text's NumberFormat class includes methods that

The advantages of the DecimalFormat class compared to the NumberFormat class include

In Java, instantiation means

When comparing any primitive type of variable, the == operator should always be used to test if two values are equal.

Introduction

Data and Expressions

Writing Classes

Conditionals and Loops

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters

Exam 3: Using Classes and Objects

Given the following two lines of code, what can be said about s1 and s2? String s1 = "testing" + "123"; String s2 = new String("testing 123");

In Java, the symbol "=" and the symbol "==" are used interchangeably.

The printf method within System.out is designed to ease the conversion of legacy C code into Java.

If you need to import not only the top-level of a package, but all its secondary levels as well, you should use the following: import package.*.*;

Only difficult programming problems require a pseudocode solution before the programmer creates the program itself.

Java.text's NumberFormat class includes methods that

The advantages of the DecimalFormat class compared to the NumberFormat class include

In Java, instantiation means

When comparing any primitive type of variable, the == operator should always be used to test if two values are equal.

Introduction

Data and Expressions

Writing Classes

Conditionals and Loops

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters

If you need to import not only the top-level of a package, but all its secondary levels as well, you should use the following: import package..;