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CUSTOMER_CODE
SMUDE
DIVISION_CODE
SMUDE
EVENT_CODE
APR2016
ASSESSMENT_CODE BCA3030_APR2016
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
18009
QUESTION_TEXT
What are the different types of packages styles?
1.Dual inline package
2.Single inline
3.Small-outline “j” lend
SCHEME OF EVALUATION
4.Thin, small-outline package
5.Chip scale package
(2 marks for each)
QUESTION_TYPE DESCRIPTIVE_QUESTION
QUESTION_ID
74020
QUESTION_TEXT Describe the working of serial port functioning.
Serial Port Functioning
(3 marks)
Serial port performs many important functions- Some of them are:

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EVALUATION
Parallel data needs to be converted into a series of serial bits;
appropriate framing bits needs to be added and the data line is to
be provided with those bits at the proper rate.
o
It must also work in the reverse process is the serial data
must be accepted at a known rate; framing bit must be
removed and the serial data converted to bus form

The key component part of serial port is a single
chip which is known as universal asynchronous
receiver/transmitter (UART). It is the controller that
takes bytes of data and transmits each data bit in a
sequential fashion. At the destination end there is
another UART controller which reassembles the
individual bits into complete byte. UART is used in
modems as well as for non-networked
communication between computers, terminals and
other devices.
DTE vs DCE
(3 marks)
DTE stands for data terminal equipment and is
considered to be a dumb terminal or a serial port of
a computer DOE stands for data carrier
communication and is normally a modem or any
other piece of data Communication equipment
There is an important distinction between DTE and
DCE because data and handshaking signals are
swapped at the DCE end. For example, the transmit
pin which exists on the 3rd pin of a DTE cannot be
directly connected to the same pin of the DCE.
Rather, it must be routed through receive pin. DCE
is responsible for such swaps so that the 3rd pin on
the transmit pin connector gets connected to
related pin on the transmit receive pin. Two DTEs
cannot be connected with a straight-through cable.
However null modem is used to swap the signals
and connect the transmit lines between the two
DTE.
Serial Port Signals
(4 marks)
Serial post signals are very helpful in easily turning
on and off by a switch. Signals can also be sued to
monitor external devices without exchanging the
serial data. Signals provide messages like loss of
power, battery low alarm and status information
with the help of power supply model.
Serial port uses either 25-pin connector or 9-pin
subminiature D-type connector to be used in the
PC.. Serial cables are identical at both the ends.
Like parallel port, serial connections also have
three types of signals namely, data lines, control
lines, and ground lines. Data signals are the
conductors that information from the serial port to
or from the modem or other peripheral. Control
signals are bidirectional protocol used between
sender and receiver, to acknowledge the sender
that the data is received Ground signal is used to
reduce the noise effects in the signal. The data
signals and control are bipolar in nature. Bipolar
signals are also called as bipolar transmission. It is
a method of sending binary data over cable or wire.
These signals are represented by 2 logic states
high and low and denoted by logic 1 and logic 0.
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
119570
QUESTION_TEXT
Give the advantages and disadvantages of switching power circuits.
Advantages of switching power circuit
When the switching transistor is on, the current is drawn in the
primary circuit. Therefore, power wastage is very less in the primary
circuit.
The secondary circuit provides just enough power to keep the load
voltage regulated. Therefore, power wastage is very less in the
secondary rectifier, filter and switching circuit.
This concept can reach a higher efficiency than linear supplies.
Components are small in size and packed tightly.
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EVALUATION
Disadvantages
It acts as radio transmitters and causes problems in radio and
television reception.
The shield on the switching circuit needs to be replaced very often,
whenever power supply is repaired.
Strong electromagnetic spectrum can easily disturb the working of the
logic circuit.
There is not enough noise in the circuit to interfere with the load as
all the noise has been removed by the filter which is designed with
care. The output voltage will always have some amount of high
frequency ripple.
Troubleshooting is very difficult as it contains many components
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
119571
QUESTION_TEXT
Give a note on Flash Memory Drivers.
Flash drive consists of four parts. They are,
SCHEME OF
EVALUATION
Male type-A USB connector: this connector is used to connect the flash
drive to any computer available in the computer world. Male type-A
USB connector provides a physical interface to the host computer. This
is similar to the contact shown in the figure 8.6
USB mass storage controller: This controller implements the USB host
controller. USB mass storage controller contains a small microcontroller
along with a small amount of on-chip ROM and RAM.
NAND flash memory chip: is a nonvolatile data storage medium that
requires no power to retain the stored data. These are mostly used in
digital cameras, memory cards, USB flash drives, etc. it is shown in the
figure 8.6 labeled as NAND EEPROM and bonding wires.
Crystal oscillator: .A crystal oscillator is an electronic oscillator circuit
that uses the mechanical resonance of a vibrating crystal of electric
material to create an electrical signal with a very precise frequency.It is
a very important part of the device.
LEDs: These are small lights that indicate the data transfers.
The other components are jumpers, write-protect switches
and USB connector cover or cap.
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
167290
QUESTION_TEXT
Discuss briefly configuring the standard CMOS setup.
Computer hardware specification gathering:you need to gather necessary information
needed to configure the CMOS.
-You need to select the second screen to set the parameters for the booting and disk
drives.
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EVALUATION
-In order to set the video characteristics you need to set the shadow memory and
disable the video on-board memory.
-When you create a setting on the computer you need to enter legacy products that
don’t detect the PnP details.
-You can re-enter the CMOS settings program and check for any errors if your
system don’t boot and rectify them.
Entries found commonly in the CMOS standard setup menu list
-Date and Time:you can change the date and time of the system clock using these
settings.
-Error halt: if an error is detected in the initial stage of the PC start, to ensure whether
the PC will stop, this entry is used. There are some more similar entries which help in
handling the halt.
-Floppy drive A:this setting is used to know the type of the floppy of the floppy drive
installed for drive A.
-Halt on: whenever you need to skip the errors during the POST, you can use this
entry.
-Hard disk C: you can auto-detect the hard drive attributes by setting the SCSI drive
setting the position as none.
-Like floppy disk drive hard disk drive also has two drives C and D.
-Daylight savings: this entry helps in allowing the RTC to activate the daylight
saving scheme.
-HDD Delay: When the BOOT is very fast then there may not be enough time to
initiate itself properly therefore this setting helps in prompting delay in the boot up
and identify the hard disk drive.
-Keyboard: this setting helps to identify whether a keyboard is attached to the system.
-Memory: this setting is used to choose the kind of memory elements to be displayed
in the start time. Based on the following types the content is distinguished by the
BIOS POST:
Base memory
Extended memory
Other memory
Total memory
-Primary display: this setting is used to identify the type of display used in the
system.
-Quick Power-on-Self-Test: you can speed up your booting time by selecting Quick
POST.
(10 marks)
QUESTION_TYPE
DESCRIPTIVE_QUESTION
QUESTION_ID
167293
QUESTION_TEXT
Explain any FIVE common issues in configuration of parallel port device
under windows.
SCHEME OF
EVALUATION
1.
Cabling problems
2.
port disabled
3.
Port configured improperly
4.
Disable any status monitors
5.
Wrong mode set for parallel port device
(10 marks)