2015 MC Practice

• Score: 32/29
• Corrections:
  • Question 4
  • Question 9
  • Question 13
  • Question 10
  • Question 16
  • Question 18
  • Question 25
  • Question 37

Score: 32/29

Corrections:

Question 4

Topic 6.4: Developing Algorithms Using Arrays

The correct answer is C: The largest value in arr is negative. maxVal is initialized to be greater than all other values in the array. Negative will not allow this

Question 9

Topic 2.9: Using the Math Class

The correct answer is E: 2 + (int) (Math.random() * 6) + (int) (Math.random() * 6). Math.random() produces a decimal between 0 and 1, including 0. Therefore multiplying it by 6 will produce a value 0-5. The dice are 1-6 so you need to add 2.

Question 13

Topic 6.4: Developing Algorithms Using Arrays

The correct answer is A: {17, 20, 21, 42, 45, 69, 48, 51, 39}. Only the first 3 values are changed. Updates the numbers at indexes 1, 4, and 7.

Question 10

Topic 2.6: String Objects - Concatenation, Literals, and More

The correct answer is D: 0008. The first line initialized str as 0. Then the second adds 008 to what the string already had to result in 0008.

Question 16

Topic 8.2: Traversing 2D Arrays

The correct answer is E: The column index of an element with the largest value in the two-dimensional array. Iterates through all rows and columns and finds the largest value.

Question 18

Topic 1.3: Expressions and Assignment Statements

The correct answer is D: 401. Problem uses integer rounding so 404/10=40.

Question 25

Topic 5.6: Writing Methods

The correct answer is E: 1 2 3 4 5 6 blackboard. All original values and names are printed. Changes made to arr and word do not affect the actual parameters num and name

Question 37

Topic 6.4: Developing Algorithms Using Arrays

The correct answer is E: II and III. Both II and III iterate through all the elements and order them in reverse.