Question 1

Which of the following statements is false?

Accepted Answer

A)  If a class does not define constructors, the compiler provides a default constructor with no parameters. 
B)  If you declare a constructor for a class, the compiler will not create a default constructor for that class. 
C)  The UML models constructors in the third compartment of a class diagram. 
D)  To distinguish a constructor from a class's operations, the UML places the word "constructor" between double quotes before the constructor's name. 
A)  If a class does not define constructors, the compiler provides a default constructor with no parameters. 
B)  If you declare a constructor for a class, the compiler will not create a default constructor for that class. 
C)  The UML models constructors in the third compartment of a class diagram. 
D)  To distinguish a constructor from a class's operations, the UML places the word "constructor" between double quotes before the constructor's name.

Question 2

Which of the following statements is false?

Accepted Answer

A)  Variables declared in the body of a particular method are local variables and can be used only in that method. 
B)  A method's parameters are local variables of the method. 
C)  Every method's body is delimited by left and right braces ({ and }). 
D)  Keyword null indicates that a method will perform a task but will not return any information. 
A)  Variables declared in the body of a particular method are local variables and can be used only in that method. 
B)  A method's parameters are local variables of the method. 
C)  Every method's body is delimited by left and right braces ({ and }). 
D)  Keyword null indicates that a method will perform a task but will not return any information.

Question 3

If a class does not define constructors, the compiler provides a default constructor with no parameters, and the class's instance variables are initialized to ________.

Accepted Answer

A)  zero 
B)  null 
C)  their default values. 
D)  false 
A)  zero 
B)  null 
C)  their default values. 
D)  false

Question 4

Which of the following statements is false?

Accepted Answer

A)  The javac command can compile multiple classes at once; simply list the source-code filenames after the command with each filename separated by a comma from the next. 
B)  If the directory containing the app includes only one app's files, you can compile all of its classes with the command javac *.java. 
C)  The asterisk (*) in javac *.java indicates that all files in the current directory ending with the filename extension ".java" should be compiled. 
D)  All of the above are true. 
A)  The javac command can compile multiple classes at once; simply list the source-code filenames after the command with each filename separated by a comma from the next. 
B)  If the directory containing the app includes only one app's files, you can compile all of its classes with the command javac *.java. 
C)  The asterisk (*) in javac *.java indicates that all files in the current directory ending with the filename extension ".java" should be compiled. 
D)  All of the above are true.

Question 5

The format specifier ________ is used to output values of type float or double.

Accepted Answer

A)  %f 
B)  %d 
C)  %fd 
D)  %r 
A)  %f 
B)  %d 
C)  %fd 
D)  %r

Question 6

An import declaration is not required if you always refer to a class with its ________ name, which includes its package name and class name.

Accepted Answer

A)  compile-time 
B)  default package 
C)  paired 
D)  fully qualified name 
A)  compile-time 
B)  default package 
C)  paired 
D)  fully qualified name

Question 7

Which of the following statements is false?

Accepted Answer

A)  Most classes you'll use in Java programs must be imported explicitly. 
B)  There's a special relationship between classes that are compiled in the same directory. By default, such classes are considered to be in the same package-known as the default package. 
C)  Classes in the same package are implicitly imported into main. 
D)  An import declaration is not required when one class in a package uses another in the same package. 
A)  Most classes you'll use in Java programs must be imported explicitly. 
B)  There's a special relationship between classes that are compiled in the same directory. By default, such classes are considered to be in the same package-known as the default package. 
C)  Classes in the same package are implicitly imported into main. 
D)  An import declaration is not required when one class in a package uses another in the same package.

Which of the following statements is false?

Which of the following statements is false?

If a class does not define constructors, the compiler provides a default constructor with no parameters, and the class's instance variables are initialized to ________.

Which of the following statements is false?

The format specifier ________ is used to output values of type float or double.

An import declaration is not required if you always refer to a class with its ________ name, which includes its package name and class name.

Which of the following statements is false?

Introduction to Computers and Java

Introduction to Java Applications

Control Statements

Control Statements

Methods

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Gui Components

Graphics and Java 2D

Fundamentals of Characters and Strings

Files, Streams and Object Serialization

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

GUI

Concurrency

Accessing Databases With JDBC

JavaFX

Filters

Exam 7: Introduction to Classes and Objects

Which of the following statements is false?

Which of the following statements is false?

If a class does not define constructors, the compiler provides a default constructor with no parameters, and the class's instance variables are initialized to ________.

Which of the following statements is false?

The format specifier ________ is used to output values of type float or double.

An import declaration is not required if you always refer to a class with its ________ name, which includes its package name and class name.

Which of the following statements is false?

Introduction to Computers and Java

Introduction to Java Applications

Control Statements

Control Statements

Methods

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Gui Components

Graphics and Java 2D

Fundamentals of Characters and Strings

Files, Streams and Object Serialization

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

GUI

Concurrency

Accessing Databases With JDBC

JavaFX

Filters