review_q_from_practice

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

review_q_from_practice_exam

Who are you? *

1. Which of the following would be the best use of citizen science? *

1 point

(A) An experiment that requires all participants to be working in the same laboratory

(B) An experiment that requires expensive equipment to conduct

(D) An experiment that requires specialized knowledge and training to conduct

2. Which of the following best characterizes a high-level programming language? *

1 point

(A) A language comprised entirely of hardware logic gates

(B) A language in which each instruction corresponds directly to an instruction in a computer’s machine code

(D) A language that uses multiple abstractions to manage complexity

3. The researchers noticed that the total number of registered users appears to be increasing at about a constant rate. If this pattern continues, which of the following best approximates the total number of registered users, in millions, in year 12 (two years after the last entry in the table) ? *

1 point

(A) 30.6

(B) 31.2

(D) 32.4

4. An application program interface (API) provides a procedure Max, which returns the greater of its two integer arguments.A programmer would like to find the greatest of three integer values a, b, and c. Which of the following expressions will produce the desired result in every case? *

1 point

(A) Max (Max (a, b), c)

(B) Max (a, b) - Max (b, c)

(D) (Max(a,b)+Max(b,c))/2

5. *

1 point

(A) counter < 0.5 * total

(B) counter > 0.5 * total

(D) total > 0.5 * counter

6. *

1 point

(A)

(B)

(C)

(D)

7. *

1 point

(A) A=true, B=false,C=false,D=false

(B) A=true, B=true, C=false,D=false

(D) A=false,B=false,C=false,D=true

8. *

1 point

(A) The number of mice increases by 1 each day.

(B) The number of mice does not change from day to day.

(D) The number of predators does not change from day to day.

9. A musician is creating a song using audio samples. Which of the following actions will minimize the risk of a copyright violation when creating sample-based music? *

1 point

(A) Using samples found on popular music-streaming sites

(B) Using samples found on peer-to-peer networks

(D) Using samples published with a no-rights-reserved Creative Commons license

10. *

1 point

(A) Code segment I displays the correct average, but code segment II does not.

(B) Code segment II displays the correct average, but code segment I does not.

(C) Both code segments display the correct average, but code segment I requires more arithmetic operations than code segment II.

(D) Both code segments display the correct average, but code segment II requires more arithmetic operations than code segment I.

11. Which of the following explains a benefit of using open standards and protocols for Internet communication? *

1 point

(A) Open standards and protocols allow different manufacturers and developers to build hardware and software that can communicate with hardware and software on the rest of the network.

(B) Open standards and protocols provide ways for users to eliminate the latency of messages they send on the Internet.

(C) Open standards and protocols allow users to freely share or reuse material found on the Internet for noncommercial purposes.

(D) Open standards and protocols prevent developers from releasing software that contains errors.

12. A student wants to create an algorithm that can determine, given any program and program input, whether or not the program will go into an infinite loop for that input. The problem the student is attempting to solve is considered an undecidable problem. Which of the following is true? *

1 point

(A) It is possible to create an algorithm that will solve the problem for all programs and inputs, but the algorithm can only be implemented in a low-level programming language.

(B) It is possible to create an algorithm that will solve the problem for all programs and inputs, but the algorithm requires simultaneous execution on multiple CPUs.

(C) It is possible to create an algorithm that will solve the problem for all programs and inputs, but the algorithm will not run in reasonable time.

(D) It is not possible to create an algorithm that will solve the problem for all programs and inputs.

13. In public key cryptography, the sender uses the recipient’s public key to encrypt a message. Which of the following is needed to decrypt the message? *

1 point

(A) The sender’s public key

(B) The sender’s private key

(D) The recipient’s private key

14. *

1 point

(A)

(B)

(C)

(D)

15. Which of the following describes how a distributed denial-of-service (DDoS) attack is most likely to compromise an online store’s Web site? *

1 point

(A) By causing incorrect information about services to be displayed

(B) By making it difficult for the site to safeguard customer login information

(D) By preventing the store from filling previously placed orders

16. *

1 point

(A) The program displays the sum of the even integers from 0 to 10.

(B) The program displays the sum of the even integers from 0 to 20.

(D) The program displays the sum of the odd integers from 1 to 19.

17. Which of the following expressions can be used to generate the string "Happy" ? *

1 point

(A) Concat (Substring ("Harp", 1, 1), Substring ("Puppy", 2, 4))

(B) Concat (Substring ("Harp", 1, 2), Substring ("Puppy", 3, 3))

(D) Concat (Substring ("Harp", 2, 2), Substring ("Puppy", 4, 2))

18. Which of the following statements accurately describe the hierarchy of the Web pages example.org and about.example.org ?Select two answers. *

2 points

(A) The Web page about.example.org is a subdomain of about.org.

(B) The Web page about.example.org is a subdomain of example.org.

(D) The Web page example.org is a domain under the top-level domain example.

Required

19. Which of the following are ways in which a programmer can use abstraction to manage the complexity of a program?Select two answers. *

2 points

(A) Replacing each instance of repeated code with a call to a procedure

(B) Replacing longer variable names with shorter variable names to reduce typing errors

(D) Replacing the string variables name1, name2, name3, and name4 with a list of strings called names

Required

20. *

2 points

(A)

(B)

(C)

(D)

Required

21. *

1 point

(A) Program A and program B display identical values.

(B) Program A and program B display the same values in different orders.

(D) Program A and program B display a different number of values.

22. *

1 point

(A) 1 hour

(B) 2 hours

(D) 5 hours

23. A color is often represented by a 6-digit hexadecimal number that describes how the colors red, green, and blue are mixed to create the desired color. From left to right, the first two digits represent the amount of red, the second two digits represent the amount of green, and the last two digits represent the amount of blue. Which of the following hexadecimal numbers represents the color with the greatest amount of blue in it? *

1 point

(A) 0099A1

(B) A10099

(D) FFA100

24. The latency of a network connection is most appropriately measured with which of the following units? *

1 point

(A) Bits per byte

(B) Bits per second

(D) Milliseconds

25. *

1 point

(A) The algorithm runs in reasonable time.

(B) The algorithm runs, but not in reasonable time.

(D) The algorithm attempts to find an approximate solution whenever it fails to find an exact solution.

26. A NAND gate is a type of logic gate that produces an output of false only when both of its two inputs are true. Otherwise, the gate produces an output of true. Which of the following Boolean expressions correctly models a NAND gate with inputs P and Q ? *

1 point

(A) (NOT P) AND (NOT Q)

(B) (NOT P) AND Q

(D) NOT (P OR Q)

Submit

Clear form

Never submit passwords through Google Forms.

This form was created inside of Sandwich Public Schools K12. Report Abuse

Forms