1: MCQs Flashcards
How many connections are necessary to make a connected packet-switched network with n nodes?
n−1, but a sufficient number will be much larger.
What are the factors that should be taken into account when designing a recommender system?
accuracy,
diversity,
privacy,
persistence (repetitions), demographics,
robustness (to frauds), serendipity (elements of surprise),
trust,
labelling.
Which of the following best describes Groupon’s business model?
- Subscription
- Merchant model
- Affiliate model
- Infomediary model
- Utility model
- Affiliate model.
What is not true about the TCP?
- There is a handshake between sender, receiver
- It is a connectionless protocol
- It is reliable
- The data sent is ordered
- TCP isn’t connectionless.
The Internet Protocol Stack 5-layer model has 4 logical layers (application, transport, network, link) and 1 physical layer.
- TCP provides a reliable connection, heavy.
- UDP is connectionless and quick, light.
Which of the following can be an IP address?
- 143.33.208.45
- 128.3.25.124.87
- 126.25.43.21.35.64
- none of the above
143.33.208.45 (first), as address consists of 4 integers.
IPv6 addresses have colon (:) separators.
Which protocol allows files to be copied from one computer to another across the Internet?
- SMTP
- HTTP
- FTP
- SNMP
FTP (File Transfer Protocol).
Which of the following is an advantage of SEO, compared to sponsored advertising?
- Able to understand customers’ intents better.
- Able to target specific demographic groups.
- Customers are more inclined to click links on search engine result pages.
- Able to improve site traffic immediately.
Customers are more inclined to click links on search engine result pages.
Advertisers A, B, C with:
CTR A = 0.5,
CTR B = 0.2,
CTR C = 0.1
bid for two slots:
bid A = 1.5,
bid B = 2,
bid C = 1 per click.
By the GSP rule which advertiser wins which slot and what are their actual payments per click?
1) A
2) B
3) C
Pa = Bid_B * CTR B/CTR A = 0.4/0.5 = 0.8
Pb = Bid_C * CTR_c/CTR_B = 0.1/0.2 = 0.5
Pc = 0
Which of the following best describes the Brokerage business model?
- B2C
- C2C
- B2B
- All of them
All of them.
What layer of the Internet Protocol 5-layer Stack model contains the TCP and UDP protocols?
Transport layer.
Which can shopbots not do?
- Product search
- Comparison shopping
- Participate in auctions
- Collect data from Flash-based banners
Collect data from Flash-based banners.
In a sealed-bid auction the valuations and bids are:
1) v1 = 5, b1 = 4,
2) v2 = 4, b2 = 2,
3) v3 = 1, b3 = 3.
Who wins in a first-price sealed-bid auction?
1) v1 = 5, b1 = 4
With payoff 5-4=1.
Is the first-price sealed-bid auction truthful?
No.
In a second-price sealed-bid auction the valuations of 3 bidders are:
1) v1 = 5
2) v2 = 4
3) v3 = 1.
If all bidders in this auction bid truthfully, who wins and what is their payoff?
1) v1 = 5 with a bid of b1=4, and a payoff of 5-4=1.
Is the second-price sealed-bid auction truthful?
Yes.
