Unit 7 Test Review Parameters, return values & libraries

the subdivision of a computer program into separate subprograms.

• API

• procedureal abstraction

• modularity

• library

What is one benefit of using existing algorithms instead of brand new algorithms?

• removes testing

• reduces abstractions in the program

• simplifies a complex program

• increases development time

What is output by the code below?

function Morning(message) {

write("Mom! ", message);

}

Morning("Good morning!");

(a)  

What is output by the code below? (separate answers by a space. Ex 5 6 7)

function doubleIt(number) {

write(number, number);

}

doubleIt("two");

(a)  

What is output by the code below? Write error if there is an error.

function sum(a, b) {

return a + b;

}

write(sum(3,5));

(a)  

What is displayed after running this program? Write error if there is an error.

function greeting(a,b) {

if (a < 0) return "Good Morning";

else {

if ( b < 5) return "Good Afternoon";

else {

if (b > a) return "Good Night";

else return "I'm going to bed";

}

}

}

console.log(greeting(3,7));

(a)  

How would you call the function if width was 5 and height was 10?

function area(width, height) {

console.log( width * height );

}

(a)  

The code checks if a word is in the list. If it is, returns true. Otherwise, it returns false.

Where should return false be written in the code?

function find(list, word) {

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

if ( word == list[i] ) {

return true;

OPTION A

}

OPTION B

}

OPTION C

}

OPTION D

• OPTION A

• OPTION B

• OPTION C

• OPTION D

You have imported a library with a findSubstring function.

Based on the API, how many numbers are input to find the character?

// Return a substring

// stringIn (string) - The full string that you want to find the substring.

// start (number) - starting index for substring (inclusive)

// end (number) - last index for substring (inclusive)

// return (string) - substring

(a)  

You have imported a library with a multiply function.

Based on the API, how many numbers are input to find the product?

// Multiplies three numbers

// num1 (number) - first number to multiply.

// num2 (number) - second number to multiply.

// num3 (number) - third number to multiply.

// return (number) - Returns the product of the 3 numbers.

(a)