Unit 5 quiz code.org

A school is developing a program to keep track of information about students and their class schedules. In which of the following instances would a data abstraction be most helpful?

• The program includes individual variables to store the names of each student rather than a single list of students.

• A program includes repeated code that could be moved inside a function.

• A program includes multiple comments that could be combined into a single comment

• A program includes repeated programming statements that could be moved inside a loop

What will be displayed when this program finishes running?

var numbersList = [20, 10, 5]

appendItem(numbersList, 50)

appendItem(numbersList,100)

removeItem(numbersList,1)

insertItem(numbersList, 0, 30)

console.log(numbersList.length)

(a)  

What will be displayed after the program?

for(var i = 0; i < 4; i++){

console.log(i);

}

(a)  

What will the following program display in the console?

var sum = 0;

for(var i = 0; i < 5; i++){

sum = sum + i;

}

console.log(sum);

(a)  

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A program is designed to determine the minimum value in a list of positive numbers called numList. The following program was written

var minimum = <MISSING CODE>

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

if (numList[i] < minimum){

minimum = numList[i];

}

}

console.log("The minimum is" + minimum);

Fill in the missing code

(a)  

A restaurant knows from historical data that 60 out of 100 of its customers purchase a full meal while 40 out of 100 only order a side dish. The program below is intended to simulate the orders of 1000 customers.

fullMeal 0

sideDish 0

REPEAT 1000 TIMES{

IF (<MISSING CODE>)

{ fullMeal fullMeal + 1}

ELSE { sideDish sideDish + 1 }}

DISPLAY (fullMeal)

DISPLAY ("full meals were ordered,")

DISPLAY (sideDish)

DISPLAY ("side dishes were ordered.")

(a)  

A job placement agency helps match job seekers with potential employers. The agency would like to design a simulation in order to help predict the likely job placement outcomes for job seekers based on historical trends and patterns. Which of the following is most likely to be a benefit of the simulation?

• The computer simulation will be able to include more details and complexity than the real-world job placement process.

• The computer simulation could be used to test hypotheses about patterns in the job placement process that are costly or time consuming to observe in reality.

• The computer simulation will remove the bias that may arise in the real-world job placement process.

• The computer simulation will be able to precisely predict the real-world outcomes for each job seeker.

• Step 1: Keep moving forward, one square at a time, until the square to the right of the robot is black. Step 2:Turn right and move one square forward. Step 3:Repeat steps 1 and 2 three more times.

• Step 1:Move forward three squares. Step 2:Turn right and move one square forward. Step 3:If the square to the right of the robot is not black, repeat steps 1 and 2.

• Step 1:Keep moving forward, one square at a time, until the square to the right of the robot is no longer black.Step 2: Turn right and move one square forward Step 3: Repeat steps 1 and 2 three more times.

Which of the following algorithms display all integers between 1 and 20, inclusive, that are not divisible by 3 ?

Select two answers.

• Step 1:Set x to 0. Step 2: Increment x by 1. Step 3: If x is not divisible by 3, then display x. Step 4: Repeat steps 2 and 3 until x is 20.

• Step 1:Set x to 1.Step 2: If x is divisible by 3, then do nothing; otherwise display x. Step 3:Increment x by 1.Step 4: Repeat steps 2 and 3 until x is greater than 20.

• Step 1: Set x to 0. Step 2: If x is divisible by 3, then display x. Step 3: Increment x by 1. Step 4: Repeat steps 2 and 3 until x is greater than 20.

• Step 1:Set x to 1. Step 2: If x is divisible by 3, then do nothing; otherwise display x. Step 3:Increment x by 1. Step 4: Repeat steps 2 and 3 until x is 20.