Answer:
B. Balanced depending and the type of questions
Answer:
def course_grader(student_to_grades, course_prefix):
student_grades = dict()
for key, value in student_to_grades.items():
grade_score = 0
for course,grade in value.items():
if course_prefix == course:
grade_score += grade
student_grades[key] = grade_score / len(value.keys())
return student_grades
Explanation:
The course_grader function is a python program that accepts two arguments, the student dictionary and the course prefix. The function returns a dictionary of the student id as the key and the average grade of the student as the value.
Solution:
The process of transaction can guarantee the reliability of business applications. Locking resources is widely used in distributed transaction management (e.g; two phase commit, 2PC) to keep the system consistent. The locking mechanism, however, potentially results in various deadlocks. In service oriented architecture, the deadlock problem becomes even worse because multiple transactions try to lock shared resources in the unexpectable way due to the more randomicity of transaction requests, which has not been solved by existing research results. In this paper, we investigate how to prevent local deadlocks, caused by the resource competition among multiple sub-transactions of a gl obal transaction, and global deadlocks from the competition among different global transactions. We propose a replication based approach to avoid the local deadlocks, and a timestamp based approach to significantly mitigate the global deadlocks. A general algorithm is designed for both local and global deadlock prevention. The experimental results demonstrate the effectiveness and efficiency of our deadlock prevention approach. Further, it is also proved that our approach provides higher system performance than traditional resource allocation schemes.
This is the required answer.
r packages include sample datasets. they also include reusable r functions and documentation about how to use the functions.
The above statement is <u>True</u>.
What are R packages?
<u>The statistical programming language R has extensions </u>known as R packages. Users of R can install R packages by <u>accessing a centralized software repository like CRAN</u>, which often contains code, data, and documentation in a common collection format.
The "library" directory is <u>where R </u><u>packages </u><u>are kept in the R environment</u>. During installation, R automatically install a number of packages. Later, when additional packages are required for a particular task, they are added.
To learn more about R packages, use the link given
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Answer: D technical skills
