The main advantage of magnetic core memory over semiconductor RAM memory is that it is non-volatile, meaning that it retains its data even when power is turned off. This makes it ideal for applications where data needs to be stored even in the event of a power outage, such as in computers and other electronic devices.
Semiconductor RAM memory, on the other hand, is volatile, meaning that it loses its data when power is turned off. This makes it less suitable for applications where data needs to be stored permanently.
A. More compact and smaller: Magnetic core memory is larger and more bulky than semiconductor RAM memory. This is because magnetic core memory is made up of small, doughnut-shaped ferrite cores that are arranged in a matrix. Semiconductor RAM memory, on the other hand, is made up of tiny transistors that are etched onto a silicon wafer.
B. More economical: Magnetic core memory is more expensive than semiconductor RAM memory. This is because magnetic core memory is a more complex technology to manufacture. Semiconductor RAM memory is a relatively simple technology to manufacture, which is why it is more economical.
C. A bit does not have to write after reading: This is not an advantage of magnetic core memory. In fact, it is a disadvantage. Magnetic core memory is a destructive read technology, which means that the data in a core is erased when it is read. This means that the data must be rewritten after it is read. Semiconductor RAM memory, on the other hand, is a non-destructive read technology, which means that the data in a memory cell is not erased when it is read. This means that the data can be read multiple times without having to be rewritten.
D. Non-volatile: This is the main advantage of magnetic core memory over semiconductor RAM memory. Magnetic core memory is non-volatile, meaning that it retains its data even when power is turned off. This makes it ideal for applications where data needs to be stored even in the event of a power outage, such as in computers and other electronic devices. Semiconductor RAM memory, on the other hand, is volatile, meaning that it loses its data when power is turned off. This makes it less suitable for applications where data needs to be stored permanently.
E. None of the above: None of the other options are advantages of magnetic core memory over semiconductor RAM memory.