CSP Unit 7 Parameters, Return, and Libraries Assessment

Which code segment results in "true" being returned if a number is even? Replace "MISSING CONDITION" with the correct code segment.

function isEven(num){

if(MISSING CONDITION){

return true;

} else {

return false;

}

}

num % 2 == 0;

Here is the API for a robot library.

// moves the robot forward

function moveForward();

// turns the robot to the left

function rotateLeft();

// turns the robot to the right

function rotateRight();

// checks if a robot can move in any direction

// direction {string} - the direction to be checked

// return {Boolean} - true if the robot can move in that direction, otherwise returns false

function canMove(direction);

Which code segment will guarantee that the robot makes it to the gray square without hitting a wall or a barrier (black square)?

function solveMaze(){

moveForward();

moveForward();

rotateRight();

while(canMove("forward")){

moveForward();

}

rotateLeft();

moveForward();

}

What will be printed to the console after this program runs?

var numbers = [2, 5, 3, 1, 6]

function changeNums(numList, addNum, subtractNum){

for(var i=0; i

[0, 3, 6, -1, 9]

Which function calls would provide the most helpful test of this function?

Remember: With tests, you are attempting to figure out all the possible ways the function could be broken.

function findMin(num1, num2){

if(num1 < num2){

return num1;

} else {

return num2;

}

}

findMin(-1, 1)

findMin(1, -1)

findMin(1, 1)

You have imported a library with the birthMonth() function. Based on the API, how many strings are inputed to calculate the birth month?

// calculate birth month based on the day of the month, day of the week, and the birth year

// dayMonth {number} - a day of a month from 1 to 31

// dayWeek {string} - the name of the day of the week

// year {number} - the birth year

// return {string} - the month you were born

BirthdayLibrary.birthMonth(dayMonth, dayWeek, year);

1

listAverage() returns the average number in a list. Which of these functions does this correctly?

function listAverage(list) {

var sum = 0;

for (var i = 0; i < list.length; i++) {

sum = sum + list[i];

}

return sum / list.length;

}

What is printed to the console?

console.log(15 % 4);

3

Which of the following is not true about procedural abstraction?

Procedural abstraction improves the speed at which a program executes.

This function checks if a character is a vowel. If it is, it returns true. Otherwise, it returns false.

Where should return false; be written in the code?

function checkVowel(character){

var vowels = ["a", "e", "i", "o", "u"];

for(var i=0; i

OPTION C

This function finds the minimum number in a list. What should be replaced with in order for this function to operate as expected?

function min(numList){

var min = numList[0];

for(var i=0; i

}

}

return min;

}

min = numList[i];

Algorithms can be created in all the following ways except:

Removing sequencing, selection, and iteration from an algorithm.

Using existing algorithms as building blocks for new algorithms has all the following benefits except:

Removes procedural abstraction.

What is one of the benefits of using a library in a program?

Simplifies creating a complex program.

Which call of the function correctly follows the instructions laid out in the API?

// moves a given element on the screen

// id (string) - the element ID for the item to be moved

// direction (string) - the direction the element should be moved

// amount (number) - the amount of pixels the element should be moved

function moveElement(id, direction, amount) {

var xPosition = getXPosition(id);

var yPosition = getYPosition(id);

if (direction == "left") {

setProperty(id, "x", xPosition - amount);

} else if ((direction == "right")) {

setProperty(id, "x", xPosition + amount);

} else if ((direction == "up")) {

setProperty(id, "y", yPosition - amount);

} else {

setProperty(id, "y", yPosition + amount);

}

}

moveElement("button1", "down", 25);

Dividing a program into separate subprograms (such as libraries) is known as:

Modularity.