Answered: How to answer the following question in…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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How to answer the following question in java

The equals method for Circle objects defined in the text determines equality of two circles using their radii. What is the output of the following code sequence?

Circle c1 = new Circle(5);

Circle c2 = new Circle(5);

System.out.println(c1 == c2);

System.out.println(c1.equals(c2));

A. true true

B. true false

C. false true

D. false false

Suppose we start with an empty SortedArrayCollection<String> object and add the elements "bat", "ant" "dog" "cat" and "eel" to the collection in that order. We then remove "cat". The element held in array index 2 will be:

A. null

B. "bat"

C. "ant"

D. "dog"

E. "eel"

Retrieval of an element from a collection is based on using:

A. the equals method.

B. the == operator.

C. aliases

D. all attributes being equal.

Suppose we start with an empty SortedArrayCollection<String> object and add the elements "bat", "ant" "dog" "cat" and "eel" to the collection in that order. The element held in array index 2 will be:

A. "bat"

B. "ant"

C. "dog"

D. "cat"

E. "eel"

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