What does code optimization mean?

Program optimization or software optimization is the process of adapting a software system to make some facet of it work more professionally or use less resource. In general, a computer program may be improved so that it performs more quickly, or is accomplished of operating with fewer memory storage or other resources, or draw less power.

VU Current Paper Solutions

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Write SQL statements/queries for each of individual scenario given below from the given tables on the next page. 15 marks (3+4+4+4)

1. Create a  simple view showing the names of employees whose designation is ”Instructor”

SELECT EmployeeName, Designation, FROM Employees

WHERE Designation = 'Instructor'

2. Create a view to list down employees name and designation  of Computer sciences Department

SELECT EmployeeName, Designation, DepartmentID, FROM Employees

WHERE DepartmentID = '1'

3. Update view to change designation from instructor to lecturer of employee “Ali hassan”

SELECT EmployeeName, Designation, FROM Employees

WHERE Designation = 'instructor' OR Designation= 'lecturer')

4. Create a view to show number of courses student “VU001” is studying.

SELECT CourseID, StudentID, FROM Employees

WHERE StudentID IN (' VU001')

In your point of view which one is better “Go back n” or “Selective Reject”? Give reasons to support your opinion.Maximum 8 lines.

The Selective-Reject ARQ protocol leads to the highest throughput of the three ARQ protocols. Here, the radio channel has a data rate of v = 6Mbit/s, a packet data size of n = 1514 byte and an unlimited window size is assumed, and the round trip delay trd, is 1 ms. ARQ protocols result in a high system throughput under good channel quality and a very low residual bit error ratio can be guaranteed. The major drawback is the need for a feedback channel and the overhead needed for signaling ACKS. The throughput degrades at low channel quality and packet delay jitter increases with increasing packet error ratio.

CS201 - Introduction to Programming

TOPIC: You have learnt all the important concepts related to programming in C++ in this course. C++ is used for System (Embedded Programming) at a large scale although there are other languages as well available for this purpose. Here you are required to give your 5 -7 strong arguments in the favor or against this statement that C++ is good for Embedded programming or not. A concise, coherent and to the point comment is preferred over lengthy comment having irrelevant details. Your comment must not be more than 5-7 lines. Comments, posted on regular Lesson's MDB or sent through email will NOT be considered. Any request about such an acceptance will not be catered. Best of Luck