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Which of the following NOT a good way to choose

Question : Which of the following NOT a good way to choose : 84374

Which of the following is NOT a good way to choose mutually harmonious colors?

Use just black and white, plus a third color for emphasis

Use three colors equally spaced but near each other (analogic)

Use two colors opposite from one another on the color wheel (complementary colors)

Use three or four colors spaced equally around the color wheel (triads and tetrads)

Use every primary and complementary color (universal)

Which of the following refers to the total time between when an operation is initiated and when the operation completes?

Latency

Responsiveness

Scalability

Security rating

Throughput

Reliability

Under what conditions would you use $(“#something”) as part of your code?

There is exactly one item on the page that you want to modify

There are exactly two items on the page that you want to modify

There are items on the page that you want to modify, but you’re unsure how many

All of the above

Which of these is NOT true about jQuery?

jQuery can insert and remove elements from the DOM

jQuery can change the appearance of elements in the DOM

jQuery works even when JavaScript is turned off in the browser

jQuery supports sending and receiving JSON

jQuery supports a range of plug-ins, including some for data validation

Where is it ok to cache information, when trying to improve scalability?

Cache information in the server if feasible; never cache in the client (JS or browser)

Cache information in the client (JS or browser) if feasible; never cache at the server

Cache information in both the client (JS or browser) and the server if feasible

Never cache information in the client (JS or browser) or the server

What is a key benefit of using jQuery, compared to using just JavaScript?

jQuery improves the scalability of your code

jQuery improves the security of your code

jQuery improves the usability of your page

jQuery improves the likelihood your code will work on many browsers

What is a key benefit of caching?

Caching eliminates the need to recompute results

Caching requires no storage to store values

Caching reduces the risk that users will receive 404 (page not found) errors

Caching eliminates the risk of security holes

All of the above

None of the above

When should you AVOID caching information?

When the information is used repeatedly

When the information is expensive to compute or retrieve

When the information changes very frequently and thus requires recomputing

When the information is small and requires little memory to store

How is indexing related to caching?

Indexing is often a good way to organize and find information in a cache (e.g., to retrieve values from an associative array)

Caching is often a good way to ensure that information is kept secure before it is indexed (e.g., by recording its primary keys in content-addressable storage)

Indexing is a useful way of validating data before you cache it

Caching is a useful way of validating data before you index it

Which of the following is true about most database systems?

Most databases will automatically create an index based on your primary key

Most database systems lack support for indexing

Most database systems will automatically delete your data once you add it to the index

Most databases will automatically create an index based on all mediumblob columns

In most databases, creating an index will speed up “insert” operations but slow down “read” (or “select”) operations

 

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Statistics 11 Months Ago 6 Views
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