MULTIPROCESSOR 

Definition

A multiprocessor system is one that has two or more processors ( CPUs) in the same computer that share memory, the system bus, and input/output (I/O). As a result, multiple processes can run together , and these systems are dependable because the failure of one processor does not impact the performance of other processors. There are two types of  multiprocessors Distributed memory  and Shared memory. In shared memory all the processor(CPU) shares a comman memory RAM and in Distributed memory every processor (CPU) has its own personal memory. The main purpose of using multiprocessor is to increase the system speed , futher it is also used for Fault tolerance and Application matching.

Benifits Of using a Multiprocessor:

• Improves Performance
• Multiple uses.
• Using many tabs when using an app
• Excellent response time and efficiency
• Hardware sharing among CPUs

Advantages 

1.  Since more processors may be added to a multiprocessor system to handle increasing workloads, multiprocessor systems works faster than single-processor systems.

2. Because these technologies provide more performance at lower energy, they are energy-efficient. Writing simultaneous code adds extra expenses, which creates problems in this case.
3. Multipe tasks can be executed at a time .
4. It only requires a little amount of complicated setup.

Disadvantages 

1. In order to ensure exact and effective task completion, multiprocessor systems need processor coordination, which can introduce more complexity and expense.

2. It has more traffic

Multicore

Definition

A single processing unit (CPU) that has two or more different processing units called cores, that can read and carry out instructions from a programme are known as Multicore system.It executes single program faster. But multicore system is not as reliable as multiprocessor system . In simple words a multi-core processor is made up of many processing units, or "Cores," on a single chip, each of which is capable of doing a different job. For example, while you are multitasking, like watching a movie and using WhatsApp, one core will take care of the movie viewing while the other would take care of other duties like WhatsApp.

Benifits

• Low energy consumption 
• Data takes less time to reach its destination
• The speed can be increased.
•  Has the potential of doing more tasks.

Advantages 

1. Performance:It can do more work as compared to single core processor .
2. Reliability:If a core fails the software is always assigned to different core .
3. Multitasking:Runs 2 or more processes at a same time.

Disadvantages

1. Dual processors cannot operate at double the speed of one. Only 60–80% greater speed is obtained.
2. A single core CPU is still used by some operating systems.