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Terms in this set (8)
The manage stage of the data life cycle is when a business decides what kind of data it needs, how the data will be handled, and who will be responsible for it.
False
Question 2
A data analyst has finished an analysis project that involved private
company data. They erase the digital files in order to keep the information secure. This describes which stage of the data life cycle?
X Archive
Plan
Manage
* Destroy
In the analyze stage of the data life cycle, what might a data analyst do? Select all that apply.
Use spreadsheets to aggregate data
Use a formula to perform calculations
Describe how the data life cycle differs from data analysis.
The data life cycle deals with the stages that data goes through during its useful life; data analysis is the process of analyzing data.
What actions might a data analytics team take in the act phase of the data analysis process? Select all that apply.
Finalizing a strategy based on the analysis
Validating insights provided by analysts
What is the main difference between a formula and a function?
A formula is a set of instructions used to perform a specified calculation; a function is a preset command that automatically performs a specified process.
Data analysts use queries to request, retrieve, and update information within a database.
True
Fill in the blank: Structured query language (SQL) enables data analysts to _____ the information in a database. Select all that apply.
update
retrieve
visualize
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Verified questions
computer science
A recursive function _______________. a. calls a different function b. abnormally halts the program c. calls itself d. can only be called once
Verified answer
computer science
For each function f(n) and time t in the following table, determine the largest size n of a problem that can be solved in time t, assuming that the algorithm to solve the problem takes f(n) microseconds.
Verified answer
computer science
Consider a file system on a disk that has both logical and physical block sizes of 512 bytes. Assume that the information about each file file is already in memory. For each of the three allocation strategies (contiguous, linked, and indexed), answer these questions: a. How is the logical-to-physical address mapping accomplished in this system? (For the indexed allocation, assume that a file is always less than 512 blocks long.) b. If we are currently at logical block 10 (the last block accessed was block 10) and want to access logical block 4, how many physical blocks must be read from the disk?
Verified answer
computer science
Design and implement an application that reads an integer value representing a year input by the user. The purpose of the program is to determine if the year is a leap year (and therefore has 29 days in February) in the Gregorian calendar. A year is a leap year if it is divisible by 4, unless it is also divisible by 100 but not 400. For example, the year 2003 is not a leap year, but 2004 is. The year 1900 is not a leap year because it is divisible by 100, but the year 2000 is a leap year because even though it is divisible by 100, it is also divisible by 400. Produce an error message for any input value less than 1582 (the year the Gregorian calendar was adopted).
Verified answer
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