Unit 6 Review APCS

Unit 6 Review APCS

9th - 12th Grade

•

18 Qs

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Unit 6 Review APCS

Unit 6 Review APCS

Assessment

Quiz

•

Mathematics

•

9th - 12th Grade

•

Practice Problem

•

Medium

•
CCSS
6.SP.B.5C

Standards-aligned

Created by

Erin Thompson

Used 7+ times

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18 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Easy: Which index is the last element in an array called nums at?

nums.length

nums.length - 1

Answer explanation

Since the first element in an array is at index 0 the last element is the length minus 1.

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Easy: Which of the following declarations will cause a compile time error?

int[] scores = null;

int[] scoreArray = {50,90,85};

String[] nameArray = new String[10];

String[] nameArray = {5, 3, 2};

int[] scores = new int[5];

Answer explanation

You can not put integers into an array of String objects.

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Easy: What is returned from arr[3] if arr={6, 3, 1, 2}?

1

2

3

6

4

Answer explanation

This returns the value in arr at index 3. Remember that the first item in an array is at index 0.

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

Easy: What is returned from mystery when it is passed {10, 30, 30, 60}?

17.5

30.0

130

32

32.5

Answer explanation

This sums all the values in the array and then returns the sum divided by the number of items in the array. This is the average.

Tags

CCSS.6.SP.B.5C

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

Easy: Given the following values of a and the method doubleLast what will the values of a be after you execute: doubleLast()?

{-20, -10, 2, 8, 16, 60}

{-20, -10, 2, 4, 8, 30}

{-10, -5, 1, 8, 16, 60}

{-10, -5, 1, 4, 8, 30}

Answer explanation

It loops from the middle to the end doubling each value. Since there are 6 elements it will start at index 3.

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

Easy: What are the values in a after multAll(3) executes?

{1, 3, -5, -2}

{3, 9, -15, -6}

{2, 6, -10, -4}

The code will never stop executing due to an infinite loop

Answer explanation

This code multiplies each value in a by the passed amt which is 3 in this case.

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

Easy: What are the values in a after mult(2) executes?

{1, 3, -5, -2}

{3, 9, -15, -6}

{2, 6, -10, -4}

The code will never stop executing due to an infinite loop

Answer explanation

The value of i is initialized to 0 and then never changes inside the body of the loop, so this loop will never stop. It is an infinite loop.

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