Computer Science: Programming with a Purpose Week 8 Quiz Answer

In this article i am gone to share Coursera Course Computer Science: Programming with a Purpose Week 8 | Abstract Data Types Quiz Answer with you..

Abstract Data Types

Question 1)

What is an object?

A variable name
Something that holds a data type value
A data type whose representation is hidden
A data type
A data type value

Question 2)

Which of the following do you need to know in order to use a data type in Java? Mark all that apply.

Its name

How to create new objects
How to destroy objects
How objects are represented
How to apply operations to an object

Question 3)

What does the following code fragment print?

String string1 = "hello";

String string2 = string1;

string1 = "world";

Stdout.println(string1 + string2);

worldhello
hellohello
helloworld
worldworld

Question 4)

Consider the following code fragment:

String t = example.substring(5, 8);

Which of the following are true after this code is executed? Mark all that apply.

(s.length() == t.length() is true
s and t refer to the same data-type value
(s == t) is false
s and t refer to different strings
(s.equals(t)) is true

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