D684 Introduction to Computer Science - Set 3 - Part 3

Correct Answer: Noise filtering

Noise filtering removes unwanted background sounds using frequency analysis, isolating user voice commands for accurate recognition processing.
Option b is incorrect because signal amplification increases volume of all sounds including noise, not helping distinguish commands.
Option c is incorrect because audio compression reduces file size but doesn't separate voice commands from background noise.
Option d is incorrect because format conversion changes audio encoding but doesn't distinguish between noise and commands.

Correct Answer: Strong consistency

Strong consistency ensures all replicas immediately reflect modifications, preventing users from seeing different file versions across servers.
Option a is incorrect because eventual consistency allows temporary inconsistencies, causing users to see outdated file versions temporarily.
Option c is incorrect because weak consistency provides minimal guarantees, potentially showing very different file versions to users.
Option d is incorrect because no consistency allows replicas to diverge permanently, making the file system unreliable.

Correct Answer: Prototype development

Prototype development creates testable versions quickly, allowing player feedback before committing resources to full feature implementation.
Option a is incorrect because waterfall development completes each phase fully before testing, too late for player interaction feedback.
Option c is incorrect because formal development uses mathematical proofs for correctness, not suitable for testing player interactions.
Option d is incorrect because reverse development analyzes existing systems, not creating new features for player testing.

Correct Answer: Dynamic routing

Dynamic routing automatically discovers and adapts to network changes including link failures, maintaining efficient packet forwarding paths.
Option a is incorrect because static routing uses fixed paths that don't adapt when network links fail unexpectedly.
Option c is incorrect because default routing sends packets to predetermined gateways, not adapting to find efficient paths.
Option d is incorrect because source routing embeds paths in packets, preventing adaptation to network failures.

Correct Answer: False positives and negatives

False positives accept unauthorized users while false negatives reject authorized ones, key metrics for biometric system effectiveness.
Option a is incorrect because speed and accuracy are general metrics not specific to the security trade-offs in biometrics.
Option c is incorrect because throughput and latency measure system performance, not security effectiveness of biometric authentication.
Option d is incorrect because precision and recall are information retrieval metrics, not specific to biometric security trade-offs.

Correct Answer: Publish-subscribe pattern

Publish-subscribe pattern pushes updates to subscribers when data changes, eliminating polling delays for immediate interface updates.
Option a is incorrect because request-response requires apps to request updates, not receiving automatic notifications of changes.
Option c is incorrect because polling pattern repeatedly checks for changes, wasting resources and causing update delays.
Option d is incorrect because batch pattern accumulates changes before sending, causing delays in user interface updates.

Correct Answer: Open standards

Open standards ensure future systems can read data without proprietary software that may become unavailable over decades.
Option a is incorrect because proprietary formats require specific software that may not exist decades later for reading data.
Option c is incorrect because compressed formats may use algorithms that become obsolete or unsupported over long periods.
Option d is incorrect because encrypted formats require keys and algorithms that might be lost or broken over decades.

Correct Answer: Lockstep synchronization

Lockstep synchronization ensures all players process the same game state simultaneously, maintaining fairness despite latency differences.
Option b is incorrect because client prediction allows temporary inconsistencies between players, potentially creating unfair advantages.
Option c is incorrect because server reconciliation corrects discrepancies after they occur, allowing temporary unfair states.
Option d is incorrect because peer validation verifies actions but doesn't ensure synchronized game states across players.

Correct Answer: Language server

Language servers provide intelligent code analysis understanding project context and patterns for accurate completion suggestions beyond simple matching.
Option a is incorrect because static analysis finds bugs and issues but doesn't provide context-aware code completion suggestions.
Option c is incorrect because text matching only finds similar strings without understanding code context or patterns.
Option d is incorrect because file indexing speeds searches but doesn't provide intelligent context-aware code completions.

Correct Answer: Environmental isolation

Environmental isolation through extreme cooling prevents external interference from destroying fragile quantum states required for quantum computation.
Option a is incorrect because power efficiency relates to energy consumption, not the temperature requirements for quantum state preservation.
Option b is incorrect because processing speed depends on quantum gate operations, not temperature-based environmental isolation requirements.
Option d is incorrect because memory capacity relates to qubit count, not the temperature isolation preventing quantum decoherence.