Question
What type of high-performance and costly computer can
process data for hundreds or thousands of users at the same time?Solution
Mainframes  are a type of computer that generally is known for their large size, amount of storage, processing power and high level of reliability.
• They are primarily used by large organizations for mission-critical applications requiring high volumes of data processing.
• All mainframes can run or host multiple operating systems.
• They are designed to handle very high-volume input and output (I/O) and emphasize throughput computing.
• A single mainframe can replace dozens or even hundreds of smaller servers.
What does the following list comprehension produce?
result = [x**2 for x in range(5) if x % 2 == 0]
print(result)
In Python, which of the following functions in the Pandas library is used to merge two DataFrames df1 and df2 on a common column id?
Which of the following is the main characteristic that differentiates random sampling from non-random sampling techniques?
Which of the following is the best approach for presenting data-driven insights to a non-technical audience?
In healthcare, how can trend analysis most effectively enhance patient care?
Which of the following SQL commands is classified as a Data Definition Language (DDL) command?
Which sampling technique is most suitable when a population has distinct subgroups that should be represented proportionally?
Which of the following R functions is most appropriate for fitting a linear regression model?
In the context of metadata for data management, which of the following examples best illustrates descriptive metadata?
Which of the following cryptographic algorithms is an example of symmetric encryption and employs a block cipher with a key size of up to 256 bits?
