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?
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 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
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