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Chopped shi
27. Least likely to introduce bias?
53. Steps 4-5 for duplicate detection?
Chopped shi
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1
53. Steps 4-5 for duplicate detection?
C) Repeat until count>2, check position≥n
B) Repeat until position>n, check count≥position
A) Repeat until position>n, then check count≥2
D) Repeat until count>n, check count≥n
2
27. Least likely to introduce bias?
A) Reward heavy users
B) Random sample for feedback
C) Only teens get feature
D) Test with local users
3
4. Which best explains the relationship between Internet and World Wide Web?
C) Internet=local networks; WWW=global connector
D) Internet=network of networks; WWW=linked pages accessed via Internet
A) They refer to the same network
B) Internet=data servers; WWW=user devices
4
69. When is metadata preferred over pixel data?
D) Identify same-location photos
A) Determine photo chronology
C) Check B&W suitability
B) Count clouds in photo
5
14. Which is a true statement about Moore’s Law?
D) Internet speed grows linearly
A) Storage doubles yearly
B) Transistors on chips double roughly every 2 years
C) Processing speed halves yearly
6
35. Which CAN'T be answered from ticket database?
B) Nonmoving violations on weekends?
C) Months with more moving violations?
D) Years with >1M moving violations?
A) Annual ticket increase?
7
46. Sequence to find top-rated credit card restaurant?
D) Filter payment → filter ratings → sort
C) Sort → filter ratings → filter payment
A) Filter ratings → filter payment → sort
B) Filter ratings → sort → filter payment
8
67. What does an API do?
C) Runs machine learning models
D) Encrypts server data
B) Connects programs to external services
A) Designs user interfaces
9
65. Which activity is NOT crowdsourcing?
A) Voting for a product feature
D) Public reports potholes via app
C) Company survey with hired analysts
B) Forum answering tech questions
10
18. True statement about the network?
A) A to D uses ≤2 paths
B) A to I passes ≤4 devices
C) If B/F fail, A can't reach G
D) If C/F fail, D can't reach H
11
63. What is phishing?
B) Downloading viruses
D) Viewing encrypted emails
C) Bypassing firewalls
A) Fake messages to steal info
12
60. [RunRoutr question: Why does the app not work as intended?]
D) Loop doesn’t iterate
B) Missing update to list
C) Data type mismatch
A) Incorrect comparison operator
13
38. When is simulation LEAST suitable?
C) Too costly/dangerous for real world
D) Needs continual real-world inputs
A) Many quick trials needed
B) Accepts simplifying assumptions
14
22. Which robot code moves to gray square?
A) First segment shown
C) Third segment shown
D) Fourth segment shown
B) Second segment shown
15
68. Which lists fail duplicate removal?
D) [50,50,50,50,50,50]
B) [30,30,30,10,20,20]
A) [10,10,20,20,10,10]
C) [30,50,40,10,20,40]
16
11. Which algorithm sorts numbers from smallest to largest?
D) Check if each number is prime
B) Swap adjacent if out of order, repeat
A) Find max, place at end, repeat
C) Choose pivot, sort left and right, combine
17
19. How weak passwords enable unauthorized access?
C) Exploit encryption flaws
D) Data mining to guess passwords
A) Denial of service attacks
B) Exploit compression flaws
18
51. Best citizen science project?
B) Monitor lab cell growth
D) 3D scan complex proteins
C) Simulate chemical impacts
A) Collect global bird pictures
19
29. What value is displayed (j=3, k=4)?
D) 12
C) 10
B) 9
A) 7
20
6. Which exemplifies multifactor authentication?
B) Shared account with unique usernames
D) Frequent password changes
C) Password + texted code
A) Entering new password twice
21
15. Which is a benefit of open-source software?
D) Only available to companies
B) License fees required
A) Hidden source code
C) Developers can modify and share code
22
37. Which vegetable is NOT displayed?
A) "artichoke"
D) "daikon"
C) "carrot"
B) "broccoli"
23
39. Minimum bits for 75-100 items?
D) 8
C) 7
A) 5
B) 6
24
13. Which problem is least likely to be solvable by an algorithm?
D) Calculating average
A) Searching a database
C) Recognizing irony in a poem
B) Sorting a list
25
43. Keylogging example?
B) Guessing common passwords
C) Viewing unencrypted transmissions
A) Unauthorized input-recording program
D) Fake bank website
26
20. Which of the following is NOT a possible value displayed by the program?
D) "daikon"
C) "carrot"
A) "artichoke"
B) "broccoli"
27
61. What is a digital divide?
D) Digital error in transmission
A) Separation between networks
B) Gap in access to tech
C) Firewall between computers
28
56. Which spreadsheets to compare GPA vs sports?
B) I and IV (multi-sport)
D) III and IV
C) II and III (GPA>3.5)
A) I (all students) and II (sports players)
29
50. Symmetric encryption?
C) Two secret keys
A) Single secret key for both
B) Single public key for both
D) Public encrypt, private decrypt
30
25. What does the procedure return?
D) Sum of integers 1 to n
C) n!
B) n²
A) Never terminates
31
49. True about algorithmic problem solving?
B) Any solvable (may need parallel devices)
D) Some problems unsolvable algorithmically
C) Any solvable (may need storage)
A) Any problem solvable (may need validation)
32
41. Crowdsourcing example for gaming?
B) Eliminate chat by default
C) Software monitors all chats
A) Players endorse courteous players
D) Update content guidelines
33
42. What value is displayed?
A) 3
C) 9
B) 4
D) 12
34
66. What is an IP address used for?
B) Encrypt messages
D) Open browser tabs
A) Secure communications
C) Route data on the internet
35
52. Max elements examined in binary search of 128?
C) 64
D) 128
B) 8
A) 2
36
65. Which display true when hot = true and humid = false?
D) Fourth IF
B) Second IF
C) Third IF
A) First IF
37
48. Rogue access point example?
C) Pose as admin to trick users
B) Physically disconnect router
A) Connect to insecure router to view traffic
D) Overwhelm router with traffic
38
17. Minimum connections to break before B can't communicate with C?
A) Three
D) Six
B) Four
C) Five
39
12. What is an example of a heuristic solution in computer science?
D) Perfect image rendering
A) Exact solution to sudoku
C) Approximate solution to traveling salesperson
B) Binary search
40
2. Which expression evaluates to true (age ≥ 12 and height 50-80 inches)?
B (age ≥ 12) AND (height ≤ 50) AND (height ≥ 80)
A) (age ≥ 12) AND ((height ≥ 50) AND (height ≤ 80))
D (age ≥ 12) OR (height ≥ 50) AND (height ≤ 80)
C) (age ≥ 12) AND ((height ≤ 50) OR (height ≥ 80))
41
40. Greatest potential to increase digital divide?
C) Discount devices for low-income
A) Library tech programs
D) Build remote area infrastructure
B) Require online job applications
42
44. Cause of imprecise account balances?
D) Unlimited bits → round-off
A) Fixed bits → overflow
B) Fixed bits → round-off
C) Unlimited bits → overflow
43
8. Which describes a DDoS attack?
D) Intercepting unencrypted emails
B) Unwanted software installation
C) Spamming a server with requests to shut it down
A) A phishing attempt to steal passwords
44
16. What is metadata?
A) Raw input from user
B) Data about data (e.g., file size, date)
D) Code that generates content
C) Final processed result
45
21. Why did video count show negative number?
D) Sampling error in analog conversion
C) Failed during high simultaneous usage
A) Exceeded maximum value for data type
B) Rounding error in calculations
46
47. Expression for restaurants ($≤30 and rating≥4.0)?
B) (rating≥4) AND ((price="lo") OR (price="med"))
A) (rating≥4) AND ((price="lo") AND (price="med"))
D) (rating≥4) OR ((price="lo") OR (price="med"))
C) (rating≥4) OR ((price="lo") AND (price="med"))
47
23. True statement about Internet?
A) Uses proprietary protocols
C) Requires encrypted communications
D) Uses centralized routing system
B) Designed to scale for more users
48
45. Which moves robot to gray square?
A) botStepper 2 then 3
D) botStepper 3 + move then 4
C) botStepper 2 + move then 3
B) botStepper 3 then 4
49
64. What is a heuristic?
A) Guaranteed optimal solution
C) Approximate method for large problems
D) Simulation of physical processes
B) Trial-and-error guess
50
31. Binary 11101 → 11101000 relationship?
C) 8× original
B) 4× original
D) 1000× original
A) 3× original
51
32. True about public key encryption?
D) Uses single secret key
C) Only works for text documents
B) Not secure because public key interceptable
A) Enables secure open-channel communication
52
9. Which describes how information is transmitted on the Internet?
B) Packets sent in fixed size, independently routed
D) Data copied to satellite then beamed
C) Encrypted images streamed in sequence
A) Packets sent in order over direct line
53
70. What is an advantage of open source software?
C) Allows community contributions
A) More expensive
B) Slower performance
D) Requires proprietary license
54
55. Which moves last list item to front?
D) Remove last, store, insert at 1
B) Remove last, store, append
A) Remove last, append
C) Store last, remove, insert at 1
55
7. Which best describes how a DNS server works?
D) Directs packets through the fastest path
B) Matches domain names to IP addresses
A) Encrypts data before sending
C) Prevents unauthorized access
56
69. What does compression do?
B) Makes files smaller
C) Duplicates files
D) Splits files into chunks
A) Encrypts files
57
68. Which scenario involves a logic error?
D) Syntax missing
A) Code doesn’t compile
C) Runs but gives wrong output
B) Infinite loop crash
58
36. Why is personal info hard to remove?
C) Automated data collection
D) Authentication protects data
A) Users redistribute copies
B) Extremely large number of devices
59
3. What are first and second executing: first is 100; second ← 200; temp ← first; second ← temp; first ← second
C) first=200, second=100
B) first=100, second=200
A) first=100, second=100
D) first=200, second=200
60
26. Challenge in parallel computing?
D) Searching documents for keywords
A) Steps require previous output
B) Same formula on many elements
C) Hard to break into small tasks
61
10. What is the purpose of using an API in software development?
C) To allow programs to interact with external systems
B) To automatically encrypt user data
A) To monitor network traffic
D) To store data permanently
62
62. Which is NOT metadata?
B) Resolution
D) Song lyrics
C) Date created
A) File size
63
34. Which change fixes the simulation?
A) Replace line 9 with IF(RANDOM(1,4)≥2)
D) Swap lines 7 and 11
B) Replace line 9 with ELSE
C) Swap lines 5 and 9
