Download CUSTOMER_CODE SMUDE DIVISION_CODE SMUDE

CUSTOMER_CODE
SMUDE
DIVISION_CODE
SMUDE
EVENT_CODE
APR2016
ASSESSMENT_CODE MIT101_APR2016
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
8498
QUESTION_TEXT
Briefly explain star topology.
SCHEME OF
EVALUATION
A star topology is designed with each node connected directly to a
central network nub or concentrator.
Data on a star network passes through the nub or concentrator before
continuing to its destination
The nub or concentrator manages and controls all functions of the
network.
It also acts as a repeater for the data flow. This configuration is
common with twisted pair cable.(2 Marks)
Advantages:Easy to install and wire (1 mark)
No disruptions to the network then connecting or removing
devices. (1 mark)
Easy to detect faults and then remove faulty parts. (1 mark)
Has the advantage of minimum data traffic along the cables. (1
mark)
Disadvantages:It requires more cable length than a linear topology (1 mark)
If the nub or concentrator fails, nodes attached are disabled. (1
mark)
Star topology is more expensive than linear bus topology because
of the cost of concentrators. (1 mark)
It requires an extremely powerful file server, plus additional
cable. (1 mark)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
72915
QUESTION_TEXT
Briefly explain the Characteristics of the computer
1.
SCHEME OF
EVALUATION
Speed
The computer is a very high speed electronic device. Computer can
perform millions of billions of operations on the data in one second.
2. Arithmetic and Logical Operations.
In arithmetic operations, it performs the addition, subtraction, multiplication
and division on the numeric data. In logical operation it compares the
numerical data as well as alphabetical data.
3. Accuracy
Computer is very accurate device. It gives accurate output result provided
that the correct input data and the set of instructions are given to the
computer. It means that output is totally depended on the given instructions
and input data.
4. Reliability
The modern computer can perform very complicated calculations without
creating any problem and produce s reliable results.
5. Storage
A computer has internal storage as well as external or secondary storage.
In secondary storage, a large amount of data and programs can be stored for
future use.
6. Retrieving data and programs
The data and program stored on the storage media can be retrieved very
quickly for further processing.
7. Automation
A computer can be automatically performs operations without interfering
the user during the operations. It controls automatically different devices
attached with the computer.
8. Versatility
Versatile means flexible. Modern computer can perform different kind of
tasks one by one of simultaneously.
9. Communications
Today the computer is mostly used to exchange messages or data through
computer networks all over the world.
10. Diligence. A computer can continually work for hours without creating
any errors.
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
119777
QUESTION_TEXT
Explain different types of O. S.
1.
Windows
2.
Unix
SCHEME OF EVALUATION 3.
Linux
4.
Mac OS
5.
Solaris
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
168495
QUESTION_TEXT
SCHEME OF
EVALUATION
Explain the Following
1. Random Access Memory (RAM)
2. Cache Memory
Random Access Memory (RAM)
Main memory of a computer system is used to store programs and data.
RAM provides temporary read/write storage while hard disks offer semipermanent storage. All programs must be run through RAM before they
can be used. The term random derives from the fact that the CPU can
retrieve data from any individual location, or address, within RAM.
RAM is volatile, which means that it requires a steady flow of electricity
to maintain its contents. As soon as the power is turned off, whatever
data was in RAM is lost. The volatile memory typically comprises
random access memory (RAM) and is considered the main memory for
the computer system.
To enable quick access for processing, a typical modern computer has a
main memory connected by a memory bus directly to the processor.
Random access memory is much faster to read from and write to than the
other kinds of storage devices in a computer such as the hard disk,
floppy disk, and CD-ROM. In contrast to the relatively slow storage
memory, the main memory is generally comprised of fast, expensive
volatile random access memory (RAM) with access times generally less
than 100 nanoseconds.
Volatile random access memory (RAM) devices may be further divided
into two categories, including static random access memory (SRAM)
and dynamic random access memory (DRAM). Static random access
memory (SRAM) consists of flip-flop latches, which each retain one bit
of data for as long as power is maintained. In dynamic random access
memory (DRAM), each memory cell is made up from one transistor and
a capacitor.
Cache Memory
A cache memory and a main memory are used for a large scale
integration circuit having a central processing unit. Memory caching is a
widespread technique used to improve data access speed in computers
and other digital systems. The speed at which processors can execute
instructions has typically outpaced the speed at which memory systems
can supply the instructions and data to the processors.
Due to this discrepancy in the operating speeds of the processors and
system memory, the system memory architecture plays a major role in
determining the actual performance of the system. Most current memory
hierarchies utilize cache memory in an attempt to minimize memory
access latencies. A cache is a small, fast memory that acts as a buffer
between a device that uses a large amount of memory and a large, slower
main memory. The cache's purpose is to reduce average memory-access
time.
Caches are effective because of two properties of software programs:
spatial and temporal locality. Cache memory is used to provide faster
access to frequently used instructions and data, which helps improve the
overall performance of the system