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!