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ASSIGNMENT DRIVE - SPRING 2017
PROGRAM - Bachelor of Computer Application
– BCA
SEMESTER - I
SUBJECT CODE & NAME - BCA215 –
Computer Organization
BK ID B1642 NUMBER OF ASSIGNMENTS,
CREDITS & MARKS 2, 4 Credits, 30 marks each
Assignment
Set -1 Questions
Q1
What do you mean by addressing modes? List the different types of addressing
modes. 3+7
Answer:-
Addressing
Modes
In general, a program operates on data
that reside in the computer’s memory. These data can be organized in a variety
of ways. If we want to keep track of students’ names, we can write them in a
list. If we want to associate information with each name, for example to record
telephone numbers or marks in various courses, we may organize this
Q2
Explain the programmer’s model of 8086. 10
Answer:-
The programmer’s model of 8086 is the
most important concept to study in the 8086 model. Figure below shows the
register organisation of 8086. This is termed as the Programmer’s model of
8086. The registers shown in the
Q3
Explain the process of fetching a word from the memory. 10
Answer:-
To fetch a word of information from the
memory CPU must specify the address of the memory location where this word is
located and request a read operation. This includes whether the information to
be fetched represents an instruction in a program or an operand
Assignment
Set -2 Questions
Q1
Write a note on replacement algorithms. 10
Answer:-
When a new block is to be brought into the cache and all the positions
that it may occupy are full, then the cache controller must decide which of the
old blocks to overwrite. Because the programs usually stay in localized areas
for a reasonable period of time, there is high probability that the blocks that
have been referenced recently will be referenced
Q2
How CPU responds to an interrupt? 10
Answer:-
The CPU checks periodically to determine
if an interrupt signal is pending. This check is usually done at the end of
each instruction, although some modern machines allow for interrupts to be
checked for several times during the execution of very long instructions. When
the CPU detects an interrupt, it then saves its current state (at least the PC
and the Processor Status Register containing condition codes); this state
information is usually saved in memory. After the interrupt has been serviced,
this state information is restored in the CPU and the
Q3
Explain the concept of coprocessor. Also explain its functions. 4+6
Answer:-
Coprocessor
Coprocessor is a relatively new concept
in the area of multiprocessing. A coprocessor refers to a computer processor
which is utilised as an addition to the functions of the cpu (the primary
processor). A coprocessor is also known as a math
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