The from: operator locates tweets from a specified Twitter account and the ________ operator specifies a date in the format yyyy-mm-dd—tweets before that date will not appear in the search results.

In a call by reference using pointers the argument is passed to the function using the address operator. What is used when passing an argument a call by reference using reference parameters?

A. You need the address operator and variable. B. You just use the variable name. C. You must declare a separate pointer first. D. You can’t do this.

Assume a cohort in the two-phase commit protocol crashes in each of the following situations. When it restarts later, explain what it does and why.

(a) Before receiving the prepare message. (b) After receiving the prepare message but before it votes (c) After sending its vote message saying it is ready to commit (d) After receiving the commit message but before it completes its commit processing