Question 1

Java provides a set of ____ classes whose objects contain primitive-type values.
A) boolean
B) instance
C) wrapper
D) char

Accepted Answer

Java provides wrapper classes for each of the primitive data types, allowing them to be treated as objects.

Question 2

____ are program errors that occur during the execution of a program.
A) Packages
B) Tokenizers
C) Streams
D) Exceptions

Accepted Answer

Exceptions are errors that occur during the execution of a program, disrupting the normal flow of the program's instructions.

Question 3

Data fields are also called ____.
A) escape sequences
B) control structures
C) primitive data types
D) instance variables

Accepted Answer

Data fields are often referred to as instance variables because they are variables that store data specific to an instance of a class.

Question 4

If you define one or more constructors for a class, you must also explicitly define the ____, or it will be undefined for that class.
A) visibility
B) no-parameter constructor
C) data type
D) escape sequence

Accepted Answer

When you define one or more constructors for a class in many programming languages, such as Java, the default no-parameter constructor is not automatically provided by the compiler. You must explicitly define it if you need it.

Question 5

A Java array has a length data field that can be used to determine the array's ____.
A) contents
B) size
C) data type
D) visibility

Accepted Answer

The length data field in a Java array is used to determine the size of the array, indicating how many elements it can hold.

Quiz 11: Introduction to Java

Java provides a set of ____ classes whose objects contain primitive-type values.

____ are program errors that occur during the execution of a program.

Data fields are also called ____.

If you define one or more constructors for a class, you must also explicitly define the ____, or it will be undefined for that class.

A Java array has a length data field that can be used to determine the array's ____.