Question 1

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 nameE) A) and C)
F) C) and D)

Question 2

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

Accepted Answer

A)   %f
B)   %d
C)   %fd
D)   %rE) B) and C)
F) None of the above

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)   falseE) C) and D)
F) None of the above

Question 4

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.E) A) and D)
F) None of the above

Question 5

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.E) A) and B)
F) None of the above

Question 6

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.E) All of the above
F) A) and B)

Question 7

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.E) A) and D)
F) B) and C)

Exam 7: Introduction to Classes and Objects

Which of the following statements is false?

Correct Answer
verified

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

Correct Answer
verified

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 ________.

Correct Answer
verified

Which of the following statements is false?

Correct Answer
verified

Which of the following statements is false?

Correct Answer
verified

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

Correct Answer
verified

Which of the following statements is false?

Correct Answer
verified

Exam 7: Introduction to Classes and Objects

Which of the following statements is false?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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 ________.

Correct AnswerverifiedShow Answer

Which of the following statements is false?

Correct AnswerverifiedShow Answer

Which of the following statements is false?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following statements is false?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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