2018 MC Practice
Questions I Got Wrong
13
The average number of characters per message appears to decrease after the mobile app was released.
14
The programs each display ten values, but each value displayed by program B is one greater than the corresponding value from program A.
31
Program I correctly moves the robot to the gray square by repeatedly moving the robot forward, rotating left, moving forward, and rotating right. Program II correctly moves the robot to the gray square by moving the robot forward to the upper-right corner of the grid, rotating left, and moving forward to the upper-left corner of the grid.
37
Both code segments display the correct average. Code segment I requires more arithmetic operations because it performs the operation sum/LENGTH(numList) within the loop, while code segment II performs the same operation only once.
40
The average total points earned per student can be determined using the result of the total points calculation for each student. The average increase in total points per student as a result of the score replacement policy can be determined by calculating the differences between each student score before and after the replacement policy was applied. The proportion of students who improved their total points as a result of the score replacement policy can be determined by comparing the midterm and final scores for each student with the result of the total points calculation.
47
In public cryptography, a message is encrypted with a recipient’s public key and decrypted with the recipient’s private key.
55
60
