Maharashtra State Board of Technical Education 2008 Diploma Electronics and Communication Computers Applications & Architecture - Question Paper

Subject: Computers Applications & Architecture
Third Year: Semester 5
3 Hours / 80 Marks
November 2008



Instructions:
1) All ques. are compulsory
2) Answer every next main ques. on a new page
3) Illustrate your answers with neat sketches wherever necessary
4) Figures to the right shows full marks
5) Assume suitable data, if needed


1. Attempt any FOUR: [Marks: 16]

a) What is AGP? State any 6 features of AGP.
b) State the meaning of subsequent terms related to Hard Disk:
i) Track
ii) Sector
iii) Cylinder
iv) Clustor
c) Describe the use of logic probe and logic pulser for maintenance.
d) List out any 4 electrical characteristics of RS232 interface standard.
e) Draw block diagram of UPS. List out kinds of UPS.
f) List out any 4 specifications of
i) Laserjet Printer
ii) Dot-matrix Printer

2. Attempt any THREE: [Marks: 12]

a) Sketch and tag block diagram of CRT monitor.
b) Which are major components of LCD? State functions of every component.
c) Which devices can be interface using firewire? List out any 6 features of firewire.
d) What is SCSI? Which are various standards for SCSI? Compare SCSI cables on the basis of no. of bits, no. of pins, cable length and noise immunity.

3. Attempt any THREE: [Marks: 12]

a) State the meaning and 1 characteristic of every kind of subsequent memory
i) SDRAM
ii) DDR
iii) L₁ Cache
iv) L₂ Cache

b) What is “POWER GOOD SIGNAL”? What is its use? State colour of power good connection cable for ATX power supply.
c) How is Hard Disk formatted? What is partitioning of Disk Drive?
d) Describe subsequent characteristics of CRT monitor.
i) DOT PITCH
ii) RESOLUTION
iii) Video bandwidth
iv) Horizontal Scanning Frequency

4. Attempt any TWO: [Marks: 16]

a) What is MODEM? Sketch and tag block diagram of external MODEM. elaborate status indicating LEPs available on the MODEM Panel?
b) Describe FM and MFM magnetic recording technique. Sketch signal for both techniques if data trend is one 1 0 0 one 0 to be recorded.
c) What is preventive maintenance? List out any 4 PC peripheral and their preventive maintenance kind. State any 6 general precautions while doing maintenance.

5. Attempt any THREE: [Marks: 12]

a) Sketch and tag block diagram of SMPS. define the function of PWM in SMPS.
b) State the diagnosis steps when pc user provide complaint that “Dead System, No Booting and No Display”.
c) What is BIOS? State functions of BIOS.
d) List out any 4 features of ISA and PCI bus.

6. Attempt any THREE: [Marks: 12]

a) Sketch internal diagram of an optomechanical mouse. define mouse operation.
b) List our physical components of Hard disk drive sub-assembly. define head actuator mechanism.
c) Sketch block diagram of dot matrix printer sub-assembly.
d) Compare DVD and CD on the basis of no. of layer, capacity and track pitch.

Earning:   Approval pending.