112 lines
7.4 KiB
Markdown
112 lines
7.4 KiB
Markdown
# Week 3 Graded Quiz: Presentations, Databases & Networks
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## Q1: Slide Design Scenario
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Tomás is building a presentation for his biology class. He has one slide with 300 words of text, a complex diagram, two photos, and an animated GIF. What is the BEST way to improve this slide?
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A. Remove all images and keep only the text so people can read it
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B. Split the content across multiple slides — one idea per slide — using visuals to support key points
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C. Make the font smaller so everything fits without scrolling
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D. Add a background video to make the slide more dynamic
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**Answer:** B
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**Explanation:** The "one idea per slide" principle keeps presentations focused and readable. Overcrowding a single slide overwhelms the audience. Each slide should support one key point with relevant visuals.
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## Q2: Database Design
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A small library wants to track books, members, and checkouts. They need to know which member checked out which book and when. What is the BEST database design approach?
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A. Put all information in one big table with columns for book title, member name, and checkout date
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B. Create three separate tables (Books, Members, Checkouts) linked by ID fields
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C. Create a separate database for each book in the library
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D. Store everything in a spreadsheet with one row per book
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**Answer:** B
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**Explanation:** Relational database design separates data into related tables to avoid redundancy. A Checkouts table links to both Books and Members via their IDs, so you don't repeat book or member details for every checkout.
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## Q3: Network Troubleshooting
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Lisa's laptop connects to her home WiFi but she can't load any websites. She can't ping google.com but CAN ping 8.8.8.8 (Google's IP address). What is MOST likely the problem?
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A. Her WiFi router is completely broken
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B. DNS is not working — her computer can't translate domain names to IP addresses
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C. Her laptop's network card has failed
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D. Google's servers are down worldwide
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**Answer:** B
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**Explanation:** If she can reach an IP address but not a domain name, the network connection works fine — the issue is DNS resolution. Her DNS server may be down or misconfigured, preventing domain names from being translated to IP addresses.
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## Q4: Query Scenario
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A school database has a Students table with fields: StudentID, Name, Major, GPA, and EnrollmentYear. The registrar wants a list of all Computer Science majors who enrolled after 2023 with a GPA above 3.0. Which approach describes the correct query logic?
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A. Select all records, then manually scan for matching students
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B. Query where Major = "Computer Science" AND EnrollmentYear > 2023 AND GPA > 3.0
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C. Query where Major = "Computer Science" OR EnrollmentYear > 2023 OR GPA > 3.0
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D. Sort the table by GPA and pick the top results
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**Answer:** B
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**Explanation:** Using AND ensures all three conditions must be true simultaneously. Using OR would return any student meeting any one condition (far too many results). Sorting alone doesn't filter — it just reorders.
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## Q5: Presentation Delivery
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During a team presentation, Anaya reads every word directly from her slides while facing the projector screen. What are TWO problems with this approach?
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A. She should use more animations and transitions to keep the audience engaged
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B. Reading slides word-for-word and not facing the audience reduces engagement and makes the slides redundant
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C. The problem is that she should have memorized the slides completely
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D. She should have printed the slides as handouts instead of presenting them
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**Answer:** B
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**Explanation:** Facing away from the audience breaks eye contact and kills engagement. Reading slides verbatim makes the presenter unnecessary — the audience could just read the slides themselves. Slides should prompt the speaker, not replace them.
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## Q6: Network Architecture
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A company has offices in San Francisco, New York, and London, all connected so employees can share files and access the same internal systems. What type of network connects these offices?
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A. LAN — since they're all part of the same company
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B. PAN — it's a personal network for the CEO
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C. WAN — it connects multiple locations across large geographic distances
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D. WiFi — all modern offices use wireless
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**Answer:** C
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**Explanation:** A WAN (Wide Area Network) connects networks across large geographic distances. Each office likely has its own LAN, and the WAN links them together. LAN only covers a single location, and WiFi is a connection method, not a network type.
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## Q7: Data Integrity
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In a Customers database table, the admin accidentally enters the same customer twice with slightly different spellings — "Jon Smith" and "John Smith" — both with different CustomerID values. What database concept would have helped prevent this?
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A. Making the CustomerID column auto-increment
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B. Input validation and duplicate-checking rules, along with good data entry procedures
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C. Deleting the CustomerID column since names should be the primary key
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D. Using a smaller database that only allows 100 records
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**Answer:** B
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**Explanation:** Input validation (standardized formats, required fields) and duplicate-checking can catch potential duplicates before they enter the system. Using names as primary keys wouldn't help since the misspelling would make them look like different records.
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## Q8: Router Scenario
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At home, Carlos has a modem from his internet provider and a separate router. His laptop connects to WiFi but has no internet access. The router's admin page shows the WAN port has no IP address. What is MOST likely the issue?
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A. The laptop's WiFi adapter is broken
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B. The router is not properly connected to the modem — the WAN/internet port has no signal
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C. Carlos needs to buy a switch to connect the router to the modem
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D. The laptop needs a static IP address assigned manually
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**Answer:** B
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**Explanation:** If the router's WAN port has no IP address, it's not receiving a connection from the modem. This usually means the cable between the modem and router's WAN port is disconnected, damaged, or the modem needs a restart.
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## Q9: Database vs Spreadsheet
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A growing business has 50,000 customer records that five employees need to access simultaneously. They're currently using a shared spreadsheet. Why should they consider switching to a database?
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A. Databases have prettier formatting than spreadsheets
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B. Databases handle large datasets, concurrent multi-user access, and data validation better than spreadsheets
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C. Spreadsheets cannot store more than 100 rows
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D. Databases are free while spreadsheet software costs money
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**Answer:** B
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**Explanation:** Databases are designed for large-scale data management with features like multi-user access controls, data validation rules, relationships between tables, and efficient querying. Spreadsheets work well for smaller datasets but struggle with concurrent access and data integrity at scale.
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## Q10: Network Security Basics
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A coffee shop offers free WiFi with no password. Why should customers be cautious when using it?
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A. Free WiFi is always slower than paid WiFi
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B. Unencrypted public WiFi lets attackers potentially intercept data transmitted between your device and the router
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C. The coffee shop can see what you're buying online and charge you extra
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D. Public WiFi networks automatically install viruses on your device
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**Answer:** B
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**Explanation:** On an open (unencrypted) WiFi network, data travels without encryption between your device and the access point. An attacker on the same network could intercept this traffic (a "man-in-the-middle" attack). Using HTTPS sites and a VPN helps mitigate this risk.
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