AP Computer Science - Java Programming CH 7 Quiz and Solutions

Java Programming CH 7 Quiz

True/False:

____ 1. To initialize a new array we can use: int[] list = new int[4];
____ 2. A single array variable can reference a large set of data.
____ 3. int[] list = new int[4] has elements list[1], list[2], list[3], list[4].
____ 4. Double [] myList = {2.0, 4.5, -6.3}; myList.add(3.5,2); // New array {2.0, 4.5, 3.5, -6.3}
____ 5. myList[i] - -; is equivalent to myList[i] = myList[i] – 1;
____ 6. You can print a list using System.out.print(myList);
____ 7. char[][] charArray = new char[3][5] makes an array with 3 columns and 5 rows.
____ 8. A for loop can contain a colon in it (:) to loop through rows.
____ 9. In the array below mat[2] = {1, 6, 3, 4}
1 7 -8 9
1 6 3 4
3 -5 7 2
____ 10. String[][] strs = new String[2][5] could look like this:
“Hello” “Nope” “Hello” “Nope” “Goodbye”
“Goodbye” “Nope” “Hello” “Goodbye” “Hansen”

Short Answer

Short Answer:

1. What does this section of code do?
   
2. If I were to enter the numbers 4 3 2.5 -6, what would the code above print?

Solutions

1. True
2. True
3. False
4. False
5. True
6. False
7. False
8. True
9. False
10. True

---

1. It takes an array of length 4 from the user and prints it.
2. 4.0 3.0 2.5 -6.0 // They all have a decimal point because they are doubles (Rational numbers).
   

All SteemitEducation Posts

Physics

Kinematics Video, Circular Motion Video, Forces in 1 & 2 Dimensions Videos, Kinematics Full Lesson, Circular Motion and Gravitation Full Lesson, Kinematics and Forces Quiz, Forces in 1-Dimension, Forces in 2-Dimensions, Basic Physics, Kinematics, and Forces Review, AP Physics Midterm Exam, AP Physics Midterm Exam Solutions

Computer Science

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17

SAT

Asymptotes, Composite Functions, Contest 1 - Area, Contest 1 – Winners and Solution, PEMDAS, Systems of Equations, Functions, Exponents, Contest 2 - More Functions, Contest 2 – Winners and Solution, Percents, The Interest Equation, All About Division, Contest 3 - Factoring, Contest 3 – Winners and Solution, Fractional and Negative Exponents, Basic Trig, Contest 4 - Math Vocab, Contest - 5, Contest 5 – Winners and Solution, Contest 6, Contest 6 – Winners and Solution

General Math

Basics of Algebra, Trigonometry Video, Proof of Quadratic Formula, Factoring Video, Unions and Intersections, Surface Area of a Cylinder, Substitution Video, Combinatorics Basics

Graphing from Algebra to Calculus

Algebra 1, Algebra 2, Pre-Calculus, Calculus

Piloting Airplanes

Introduction, Preflight, Requirements, Instruments, Take-Offs and Landings, Why a Plane Can Fly, Reading the Runway, Maneuvers

Other

Engineering (Isometric) Drawing, Pressure & SCUBA Diving

Learn much my friends! Best wishes to the fellow Steemers!