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This module contains review questions and answers keyed to the module titled Jb0240: Java OOP: Arrays and Strings.

Revised: Mon Mar 28 16:31:25 CDT 2016

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Table of contents

Preface

This module contains review questions and answers keyed to the module titled Jb0240: Java OOP: Arrays and Strings .

The questions and the answers are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back again.

Questions

Question 1 .

True or false? Arrays and Strings are true objects. If false, explain why.

Answer 1

Question 2

True or false? It is easy to write outsides the bounds of a String or an array. If false, explain why.

Answer 2

Question 3

You must declare a variable capable of holding a reference to an array object before you can use it. In declaring the variable, you must provide two importantpieces of information. What are they?

Answer 3

Question 4

Provide code fragments that illustrate the two different syntaxes that can be used to declare a variable capable of holding a reference to an array objectthat will store data of type int.

Answer 4

Question 5

True or false? When you declare a variable capable of holding a reference to an array object, the memory required to contain the array object is automaticallyallocated. If false, explain why and show how memory can be allocated.

Answer 5

Question 6

True or false? It is required that you simultaneously declare the name of the variable and cause memory to be allocated to contain the array object in a singlestatement. If false, explain why and show code fragments to illustrate your answer.

Answer 6

Question 7

True or false? Array indices always begin with 1. If false, explain why.

Answer 7

Question 8

What is the name of the property of arrays that can be accessed to determine the number of elements in the array? Provide a sample code fragment thatillustrates the use of this property.

Answer 8

Question 9

What types of data can be stored in array objects?

Answer 9

Question 10

True or false? Just as in other languages, when you create a multi-dimensional array, the secondary arrays must all be of the same size. Iffalse, explain your answer. Then provide a code fragment that illustrates your answer or refer to a sample program in Jb0240: Java OOP: Arrays and Strings that illustrates your answer.

Answer 10

Question 11

True or false? Just as in other languages, when declaring a two-dimensional array, it is necessary to declare the size of the secondary dimension when thearray is declared. If false, explain your answer. Then provide a code fragment that illustrates your answer or refer to a sample program in Jb0240: Java OOP: Arrays and Strings that illustrates your answer.

Answer 11

Question 12

True or false? Java allows you to assign one array to another. Explain what happens when you do this. Then provide a code fragment that illustrates youranswer or refer to a sample program in Jb0240: Java OOP: Arrays and Strings that illustrates your answer.

Questions & Answers

explain and give four Example hyperbolic function
Lukman Reply
The denominator of a certain fraction is 9 more than the numerator. If 6 is added to both terms of the fraction, the value of the fraction becomes 2/3. Find the original fraction. 2. The sum of the least and greatest of 3 consecutive integers is 60. What are the valu
SABAL Reply
1. x + 6 2 -------------- = _ x + 9 + 6 3 x + 6 3 ----------- x -- (cross multiply) x + 15 2 3(x + 6) = 2(x + 15) 3x + 18 = 2x + 30 (-2x from both) x + 18 = 30 (-18 from both) x = 12 Test: 12 + 6 18 2 -------------- = --- = --- 12 + 9 + 6 27 3
Pawel
2. (x) + (x + 2) = 60 2x + 2 = 60 2x = 58 x = 29 29, 30, & 31
Pawel
ok
Ifeanyi
on number 2 question How did you got 2x +2
Ifeanyi
combine like terms. x + x + 2 is same as 2x + 2
Pawel
Mark and Don are planning to sell each of their marble collections at a garage sale. If Don has 1 more than 3 times the number of marbles Mark has, how many does each boy have to sell if the total number of marbles is 113?
mariel Reply
Mark = x,. Don = 3x + 1 x + 3x + 1 = 113 4x = 112, x = 28 Mark = 28, Don = 85, 28 + 85 = 113
Pawel
how do I set up the problem?
Harshika Reply
what is a solution set?
Harshika
find the subring of gaussian integers?
Rofiqul
hello, I am happy to help!
Shirley Reply
please can go further on polynomials quadratic
Abdullahi
hi mam
Mark
I need quadratic equation link to Alpa Beta
Abdullahi Reply
find the value of 2x=32
Felix Reply
divide by 2 on each side of the equal sign to solve for x
corri
X=16
Michael
Want to review on complex number 1.What are complex number 2.How to solve complex number problems.
Beyan
yes i wantt to review
Mark
use the y -intercept and slope to sketch the graph of the equation y=6x
Only Reply
how do we prove the quadratic formular
Seidu Reply
please help me prove quadratic formula
Darius
hello, if you have a question about Algebra 2. I may be able to help. I am an Algebra 2 Teacher
Shirley Reply
thank you help me with how to prove the quadratic equation
Seidu
may God blessed u for that. Please I want u to help me in sets.
Opoku
what is math number
Tric Reply
4
Trista
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
Sidiki Reply
can you teacch how to solve that🙏
Mark
Solve for the first variable in one of the equations, then substitute the result into the other equation. Point For: (6111,4111,−411)(6111,4111,-411) Equation Form: x=6111,y=4111,z=−411x=6111,y=4111,z=-411
Brenna
(61/11,41/11,−4/11)
Brenna
x=61/11 y=41/11 z=−4/11 x=61/11 y=41/11 z=-4/11
Brenna
Need help solving this problem (2/7)^-2
Simone Reply
x+2y-z=7
Sidiki
what is the coefficient of -4×
Mehri Reply
-1
Shedrak
the operation * is x * y =x + y/ 1+(x × y) show if the operation is commutative if x × y is not equal to -1
Alfred Reply
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
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Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
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