Question and Answer

1.  Which transistor is used in each cell of EPROM?

Floating?gate Avalanche Injection MOS (FAMOS) transistor is used in each cell of EPROM.

2.   What is called Scratch pad of computer?

Cache Memory is scratch pad of computer.

3.     What is cache memory?

Cache memory is a small high-speed memory. It is used for temporary storage of data & information between the main memory and the CPU (center processing unit). The cache memory is only in RAM.

Cache memory is random access memory (RAM) that a computer microprocessor can access more quickly than it can access regular RAM. As the microprocessor processes data, it looks first in the cache memory and if it finds the data there.

4.    What is interrupt?

Interrupt is a signal send by external device to the processor so as to request the processor to perform a particular.

5.      Difference between static and dynamic RAM?

Static RAM: No refreshing, 6 to 8 MOS transistors are required to form one memory cell, Information stored as voltage level in a flip flop.

 Dynamic RAM: Refreshed periodically, 3 to 4 transistors are required to form one memory cell, Information is stored as a charge in the gate to substrate capacitance.

6.      What is difference between primary & secondary storage device?

Primary Storage device the storage capacity is limited. It has a volatile memory.

Secondary storage device the storage capacity is larger. It is a nonvolatile memory. 

Primary devices are: RAM / ROM. 

Secondary devices are: Floppy disc / Hard disk. 

7.        What are the static and dynamic hazards in logic circuits?

If for a short period of time circuits goes to some different logic level then it is 

supposed to have then it is called static hazard.e.g. If the final logic value of output of a

given circuit becomes one even if it is supposed to be zero then it is called Static-0

 Hazard and vice versa. Dynamic Hazard is the one in which the circuit output goes to some other logic

 level more than once then finally settling down to some appropriate level.

8.        What is the difference between microprocessor and microcontroller?

Microprocessor: more op-codes, few bit handling instructions.

Microcontroller: fewer op-codes, more bit handling Instructions, and also it is defined as a device that includes micro processor, memory, & input / output signal lines on a single chip.the basic architectural difference is that microcontroller has an programmable memory while it is not the case with microprocessors. 

9.          What is the disadvantage of microprocessor?

          It has limitations on the size of data. Most Microprocessor does not support floating-point operations. 

10.         Explain Compiler?

Compiler is used to translate the high-level language program into machine code at a time. It doesn?t require special instruction to store in a memory, it stores automatically. The Execution time is less compared to Interpreter.

A compiler is a program that translates a source program written in some high-level programming language (such as Java) into machine code for some computer architecture (such as the Intel Pentium architecture).