Answer: Denormalize is the mechanism is carried out by addition of the redundant bits in the already normalized database.The data is attached in the form of attributes,adding new tables.
This technique is used in the case of previously normalized data collection which requires improvement in the performance by reducing the errors.The improvement is made by making database readable ,adding group of data in redundant form etc.
When data is to be retrieved quickly then also denormalization is used as by grouping or collecting information into a single table.
Please provide photos for your question.
Answer:
There are way in separating mixtures of chlorides salts such as that of sodium chloride and ammonium chloride. It can be done by crystallization, filtration or sublimation. If we want to separate the mixture, we have to heat up to 330-350 degrees Celsius and collect the gas that will be produced.
Keira is using the software development life cycle to create a new app. She has the pseudocode for her program. The next stage for Keira is CODING.
Explanation :
- SDLC or the Software Development Life Cycle is a process that produces software with the highest quality and lowest cost in the shortest time. SDLC includes a detailed plan for how to develop, alter, maintain, and replace a software system.
- SDLC involves several distinct stages, including planning, design, building, testing, and deployment. Popular SDLC models include the waterfall model, spiral model, and Agile model.
- The steps of the SDLC are given below :
- Identify the current problems. “What don’t we want?”
- Plan. “What do we want?”
- Design. “How will we get what we want?”
- Build. “Let’s create what we want.” This SDLC stage develops the software by generating all the actual code. If the previous steps have been followed with attention to detail, this is actually the least complicated step.
- Build is the phase which Keira should move onto in the SDLC
- SDLC done right can allow the highest level of management control and documentation. Developers understand what they should build and why. All parties agree on the goal up front and see a clear plan for arriving at that goal. Everyone understands the costs and resources required.
Answer: Hepatitis
Explanation: According to the center for disease control and prevention (CDC) HIV, hepatitis B and Hepatitis C are the most common bloodborne pathogens which workers are more susceptible to contract. According to CDC's the estimated risk of an HIV infection is 0.3 percent, 1 from 300 people. Hepatitis B has from 6 to 30 percent causing serious liver damage. And Hepatitis C has a risk between 2 and 4 percent
