Microprocessor and PC Hardware-Sem 3-B.C.A-Sep-2019
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SAINTGITS COLLEGE OF APPLIED SCIENCES
INTERNAL
ASSESSMENT EXAMINATION, SEPTEMBER 2019
Department of
B.C.A, Semester 3
Microprocessor and PC Hardware (Answer
key)
Total : 80 marks Time:
3 Hours
Section
A
Answer any 10 questions.
Each question carries 2 marks.
1. What is
microprocessor? Give the power supply and clock frequency of 8085.
A microprocessor is a
multipurpose, programmable logic device that reads binary instructions from a
storage device called memory accepts binary data as input and processes data
according to those instructions and provides result as output. The power supply of 8085 is +5V and clock frequency in 3MHz.
2. Explain the signals
HOLD and READY.
HOLD indicates
that a peripheral such as DMA controller is requesting the use of address bus,
data bus and control bus. READY is used to delay the microprocessor read or
write cycles until a slow responding peripheral is ready to send or accept
data. SID is used to accept serial data bit by bit
3. What is the function
of program counter?
A program counter is a register
in a computer processor that contains the address (location) of the instruction
being executed at the current time. As each instruction gets fetched, the program counter increases its
stored value by 1.
4. Define ROM.
ROM is an acronym for Read-Only Memory. It refers to
computer memory chips containing permanent or semi-permanent data. Unlike RAM, ROM is non-volatile; even after you turn off your computer,
the contents of ROM will remain.
5. What is AGP?
AGP is an
advanced port designed for video cards and 3D accelerators
6.
Differentiate between recirculating and breather filter.
The recirculating filter that is permanently installed inside the HDA is
designed to filter only the small particles of media scraped off the
platters during head takeoffs and landings (and possibly any other small
particles dislodged inside the drive). The breather filter is used to
stabilize the temperature maintained inside the system.
7. Define Form
factor.
HDD form factor (hard disk drive form factor) is the size or geometry of a data storage device equipped with
one or more magnetic-coated spinning platters and one or more moving actuator
arms with magnetic heads to read and write information
8.What is Upper
Memory Area?
In
DOS memory management, the upper memory area refers to memory between the
addresses of 640 KB and 1024 KB in an IBM PC or compatible. IBM reserved the
uppermost 384 KB of the 8088 CPU's 1024 KB address space for ROM, RAM on
peripherals, and memory-mapped input/output.
9. What is the
function of an accumulator?
he accumulator is an 8-bit
register that is a part of arithmetic/logic unit (ALU). This register is used
to store 8-bit data and to perform arithmetic and logical operations. The
result of an operation is stored in the accumulator
10. What is
T-State?
T-state is defined as
one subdivision of operation performed in one clock. period. These subdivisions
are internal states synchronized
with the system clock, and each T-state is precisely
equal to one clock period
11. What is the
function of IO/M signal in 8085.
It
is a status signal. It is used to differentiate between memory locations and
I/O operations. When this signal is low (IO/M = 0) it denotes the memory related operations.
12. What is
MCA?
M.C.A
stands for micro channel architecure (10 X 2 = 20)
Section B
Answer any six of the following. Each question
carries 5 marks.
13. Briefly explain
different types of interrupts in 8085.
Definition - 1 mark
Types - 1 mark
Explanation - 3 marks
14. Explain the
criteria’s to be followed while selecting a motherboard.
Motherboard chipset., processor socket, memory, form
factor, bus slots, bios features etc
Detailed explanation – 5 marks
15. With the help of a
timing diagram explain Memory Read and Memory Write machine cycle.
Explanation - 3
marks
Diagram - 2
marks
16. Explain disk geometry
of HDD.
Hard disk drives are composed of one or more disks or platters
on which data is stored. The geometry of a hard drive is the
organization of data on these platters. Geometry determines
how and where data is stored on the surface of each platter, and thus the
maximum storage capacity of the drive
17. Write a note on
various flag registers in 8085.
Flag registers -2
marks
Detailed explanation -
3 marks
18. Define Bus. Explain
different bus in microprocessor with its uses.
A bus is, in short,
a group of wires, required to transfer information in parallel binary data
form. ... Different segments of a microprocessor is connected
with internal connections called the internal bus. Microprocessor also have
address bus which is required to fetch data from external memory - 2 marks
Explanation of types of
buses -
3 marks
19. Write a note on
evolution of microprocessor.
Explanation -5 marks
20. Explain in detail
arithmetic instructions with an example and proper syntax.
Instruction list -1
mark
Definition -2 marks
Examples -2 marks
21. Write a note on
interleave with proper examples.
Definition & explanation -3 marks
Example -
2marks
(6 X 5 = 30)
Section C.
Answer any two of the
following.
Each question carries
15 marks
22.
Explain in detail various memory modules.
SIMM, DIMM, RIMM etc.
Explanation – 5 marks
23.
Briefly explain various components of motherboard in detail.
Explanation – 15 marks
24.
What is an expansion slot? Explain its various types.
Definition
– 5 marks
Types
explanation – 12 marks
25.
Explain various types of addressing modes in 8085 microprocessors.
Explanation – 15 marks
(2
X 15 = 30)
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