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# Programming Help

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1. a) Consider a database with objects A, B, and C, and the following two transactions T₁ and T₂ involving those objects: T₁ T₂ begin_transaction begin_transaction read(A) read(A) read(B) read(B) read(C) read(C) If A = 13, B := B + B if B = 13, A := A + 1 C := C + 3 C := C + 2 write(B) write(A) write(C) write(C) Commit commit Let the initial values of A and B be 13, and the initial value of C be 10. Also let the consistency requirement be: either A = 13 or B = 13 Show the values that A, B and C would have after the (serial) execution of transaction T₁ followed by the execution of T₂. Show the values of A, B and C if the transactions were executed in the reverse order instead, that is, first T₂ was executed, and then T₁. b) Describe what Database consistency means and using the two findings in part(a) above, show that every serial execution of these two transactions T₁ and T₂ preserves the consistency of the database. (Limit your answer to 60 words) c) This question assumes the following relation schema: Employees(employeeNumber, lastName, firstName, DOB, HireDate, Position, Salary, DeptID) Primary Key: employeeNumber Foreign Key: DeptID refers to DeptID in Departments Departments(DeptID, DeptName, DeptLocation) Primary Key: DeptID Given the following expression in the Relational Algebra: employeeNumber, lastName, firstName, DeptName((Position = 'Manager' Employees) Departments) Show the corresponding SQL query.
2. A function is declared: void bazz(long A[], long B[], int n) { /* …. */ } The compiler, given -Og option, generates the following code: movl \$0, %eax .L2: cmpl %edx, %eax jge .L4 movslq %eax, %rcx movq (%rsi, %rcx, 8), %r8 addq %r8, (%rdi, %rcx, 8) addl \$1, %eax jmp .L2 .L4: ret (Note: the movslq instruction moves and sign-extends the low-order 32 bits of a register to the full 64-bit destination register.) Write the C code for the body of this function.
3. Task 2: Submission Format:  A step by step record of the development and debugging of a program from an algorithm with demonstrations of the running code.  The running (compiled/interpretable) code in executable form.  An evaluation report (500 words +/- 100) on using or not using an IDE for software Development.  An evaluation of the debugging process.  An explanation of coding standards and a critical evaluation of the necessity for their use both by individuals and teams.
5. Write the definition of an algorithm, along with a clear outline of the process of developing and building an application.
6. write a program that calculates the occupancy rate of a hotel. The program should start by asking the user how many floors the hotel has. a loop should then iterate once for each floor. In each iteration, the loop should ask the user the number of rooms on the floor and how many of them are occupied. After all the iterations, the program should display how many rooms the hotel has, how many of them are occupied, how many of them are unoccupied, and the percentage of rooms that are occupied. The percentage may be calculated by dividing the number of rooms occupied by the number of rooms. INPUT VALIDATION: do not accept a value less than 1 for the number of floors.

## Coding homework help

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What is Programming

Programming is a set of instructions given to the computer that is written in computing languages that are processed by the CPU. The aim is to find the set of instructions that will automatically enable the task. Programming is mostly used by software developers, engineers, security hackers, etc.

Programming assignment help makes it easier for the students to understand the way to write clean codes that are easy to read and execute. The most widely used computer languages are C++, Java, Python, and HTML/CSS. Following is the overview of each language that Desklib’s programming assignment help will cover.

### The subjects that the programming coursework covers:

C++

C++ is one of the most widely used languages among programmers. C++ is efficient in running machine-level programs to sophisticated applications, hence, it is called a middle-level language. The basic syntax of C and C++ are the same. It is an object-oriented programming language, which makes it more efficient and easy-to-use than C.

Java:

Java is a high-level language, in which the code is compiled to a byte-code and then Java Virtual Machines (JVM) is used for running the compiled code, making it platform-independent. Java is an object-oriented language and is suitable for developing high-quality web applications and software because of it’s a robust exception and error handling support.

Python :

Python is a high-level language and provides immense support to developers, programmers, and researchers with ample amounts of libraries making it one of the most used languages for web development and machine learning. Python syntax is based on indentations which makes it much more readable than java. Python supports object-oriented programming as well.

HTML/ CSS :

HTML stands for HyperText Markup Language, it is used to develop web-pages by defining the set of structures using tags. HTML is generally used along with CSS and JavaScript. CSS makes the HTML content more presentable by modifying the appearance using attributes and JavaScript is used to change the static behavior of HTML content using Data Object Models (DOM).

Desklib provides students with an in-depth understanding of programming so that they understand the importance of it and make a prosperous career out of it.

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