# Week 3 Graded Quiz: Presentations, Databases & Networks ## Q1: Slide Design Scenario 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? A. Remove all images and keep only the text so people can read it B. Split the content across multiple slides — one idea per slide — using visuals to support key points C. Make the font smaller so everything fits without scrolling D. Add a background video to make the slide more dynamic **Answer:** B **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. ## Q2: Database Design 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? A. Put all information in one big table with columns for book title, member name, and checkout date B. Create three separate tables (Books, Members, Checkouts) linked by ID fields C. Create a separate database for each book in the library D. Store everything in a spreadsheet with one row per book **Answer:** B **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. ## Q3: Network Troubleshooting 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? A. Her WiFi router is completely broken B. DNS is not working — her computer can't translate domain names to IP addresses C. Her laptop's network card has failed D. Google's servers are down worldwide **Answer:** B **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. ## Q4: Query Scenario 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? A. Select all records, then manually scan for matching students B. Query where Major = "Computer Science" AND EnrollmentYear > 2023 AND GPA > 3.0 C. Query where Major = "Computer Science" OR EnrollmentYear > 2023 OR GPA > 3.0 D. Sort the table by GPA and pick the top results **Answer:** B **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. ## Q5: Presentation Delivery During a team presentation, Anaya reads every word directly from her slides while facing the projector screen. What are TWO problems with this approach? A. She should use more animations and transitions to keep the audience engaged B. Reading slides word-for-word and not facing the audience reduces engagement and makes the slides redundant C. The problem is that she should have memorized the slides completely D. She should have printed the slides as handouts instead of presenting them **Answer:** B **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. ## Q6: Network Architecture 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? A. LAN — since they're all part of the same company B. PAN — it's a personal network for the CEO C. WAN — it connects multiple locations across large geographic distances D. WiFi — all modern offices use wireless **Answer:** C **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. ## Q7: Data Integrity 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? A. Making the CustomerID column auto-increment B. Input validation and duplicate-checking rules, along with good data entry procedures C. Deleting the CustomerID column since names should be the primary key D. Using a smaller database that only allows 100 records **Answer:** B **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. ## Q8: Router Scenario 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? A. The laptop's WiFi adapter is broken B. The router is not properly connected to the modem — the WAN/internet port has no signal C. Carlos needs to buy a switch to connect the router to the modem D. The laptop needs a static IP address assigned manually **Answer:** B **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. ## Q9: Database vs Spreadsheet 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? A. Databases have prettier formatting than spreadsheets B. Databases handle large datasets, concurrent multi-user access, and data validation better than spreadsheets C. Spreadsheets cannot store more than 100 rows D. Databases are free while spreadsheet software costs money **Answer:** B **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. ## Q10: Network Security Basics A coffee shop offers free WiFi with no password. Why should customers be cautious when using it? A. Free WiFi is always slower than paid WiFi B. Unencrypted public WiFi lets attackers potentially intercept data transmitted between your device and the router C. The coffee shop can see what you're buying online and charge you extra D. Public WiFi networks automatically install viruses on your device **Answer:** B **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.