03-10-2012, 05:17 PM
Microprocessor, Microcomputer and Associated Languages Questions
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1. On which model is based the basic architecture of a digital computer?
Ans. The basic architecture of a digital computer is based on Von Neumann model.
2. What is meant by distributed processing?
Ans. Distributed processing involves the use of several microprocessors in a single computer
system. For example, for such a system, the first microprocessor may control keyboard
activities, the second controls storage devices like disk drives, the third controls input/
output operations, while the fourth may act as the main system processor.
3. When was the first microprocessor developed?
Ans. The first microprocessor was developed by BUSICOM of Japan and INTEL of USA in the
year 1971.
4. What is a microprocessor?
Ans. A microprocessor may be thought of as a silicon chip around which a microcomputer is
built.
5. What is the technology used in microprocessors?
Ans. NMOS technology is used in microprocessors.
6. What are the three main units of a digital computer?
Ans. The three main units of a digital computer are: the central processing unit (CPU), the
memory unit and the input/output devices.
7. How does the microprocessor communicate with the memory and input/output
devices?
Ans. The microprocessor communicates with the memory and the Input/Output devices via
the three buses, viz., data bus, address bus and control bus.
8. What are the different jobs that the CPU is expected to do at any given point of
time?
Ans. The CPU may perform a memory read or write operation, an I/O read or write operation
or an internal activity.
9. What is a mnemonic?
Ans. It is very difficult to understand a program if it is written in either binary or hex code.
Thus the manufacturers have devised a symbolic code for each instruction, called a
mnemonic.
10. What is machine language programming?
Ans. Programming a computer by utilising hex or binary code is known as machine language
programming.
11. What is meant by assembly language programming?
Ans. Programming a microcomputer by writing mnemonics is known as assembly language
programming.
12. What are meant by low level and high level languages?
Ans. Programming languages that are machine dependent are called low level languages. For
example, assembly language is a low level language.
On the other hand, programming languages that are machine independent are called
high level languages. Examples are BASIC, FORTRAN, C, ALGOL, COBOL, etc.
13. What is meant by ‘word length’ of a computer?
Ans. The number of bits that a computer recognises and can process at a time is known as
its ‘word length’.
14. What is meant by instruction?
Ans. An instruction is a command which asks the microprocessor to perform a specific task
or job.
15. How many different instructions mP 8085 has? What is an instruction set?
Ans. 8085 microprocessor has a total of 74 different instructions for performing different
operations or tasks.
The entire different instructions that a particular microprocessor can handle is
called its instruction set