Cybersecurity: Programming Fundamentals

How can we improve the following program?

function start() {

          move();

          move();

          move();

          move();

          move();

          move();

          move();

          move();

          move();

}

• Break down this program into more functions

• Use a for loop to repeat the move command

• Use a while loop to repeat the move command

• Fix the indentation of this program

What keyword do you need to use to define a variable in JavaScript?

• variable

• var

• const

• x

What will be printed as a result of the following code segment?

var firstPlace = "Dylan";

var secondPlace = "Jacob";

firstPlace = "Jacob";

secondPlace = "Julia";

println(firstPlace);

println(secondPlace);

• Dylan/Jacob

• Jacob/ Dylan

• Jacob/ Julia

• Julia/ Jacob

Which of these is a valid Karel command?

• move;

• MOVE

• move();

• move()

Why do we use while loops in JavaScript?

• To break out of some block of code

• To do something if a condition is true

• To repeat some code while a condition is true

• To repeat something for a fixed number of times

Which general while loop definition is written correctly?

A

while (x is true) {

       // code

}

B

if (i<5) {

     //code

}

C

while (var i = 0; i < count; i++) {

      //code

}

D

while (condition) {

      //code

}

• A

• B

• C

• D

What does an if/else statement look like in JavaScript?

A

if (condition) {

      //code

}

B

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

     //code

} 

C

if (condition) {

     //code }

if (condition) {

      //code

}

D

if (condition) {

      //code

} else {

       //code

}

• A

• B

• C

• D

Why do we use if/else statements in JavaScript?

• To repeat something for a fixed number of times

• To do something if a condition is true and do something else if the condition is false

• To break out of some block of code

• To repeat something while a condition is true

We want to make a grocery list in our program. Which of the following is the correct way to make an array/list?

• var groceries = "milk, sugar, eggs, cake";

• var groceries = ["milk, sugar, eggs, cake"];

• var groceries = ["milk" "sugar" "eggs" "cake"];

• var groceries = ["milk", "sugar", "eggs", "cake"];

Suppose we’ve created an object phonebook that contains our friends’ names (keys) associated with their phone numbers (values). How can we get the phone number for Jenny?

• var number = phonebook["Jenny"];

• var number = phonebook{"Jenny"};

• var number = phonebook.indexOf("Jenny");

• var number = phonebook.number("Jenny");