Bharathiar University 2008-2nd Sem B.C.A Computer Application Bachelor of , - - Microprocessors and Assembly Language Programming - Question Paper

Bachelor of Computer Application (BCA), APR - 2008

Microprocessors and Assembly Language Programming (Sem 2)

1. _____________ is a medium that stores binary info.
a. Input
b. Output
c. Memory
d. ALU
1.0 Mark(s)
2. _____________ register is used to sequence the execution of instructions.
a. Stack pointer
b. Accumulator
c. Flag
d. Program counter
1.0 Mark(s)
3. The different ways of specifying data are called _____________.
a. addressing modes
b. data input
c. data specifications
d. data modes
1.0 Mark(s)
4. LDAX B/D means _____________.
a. Load Register Pair Immediate
b. Load Accumulator
c. Store Accumulator
d. Load Accumulator Indirect
1.0 Mark(s)
5. In ADC _____________ is described as the total time needed to convert an analog signal into its digital output.
a. speed
b. conversion time
c. transformation
d. delay time
1.0 Mark(s)
6. Mode two of 8254 is called _____________.
a. rate generator
b. square-wave generator
c. software-triggered strobe
d. interrupt on terminal counter
1.0 Mark(s)
7. In choose port A in 8255A, the signals equals to _____________.
a. 001
b. 1XX
c. 011
d. 000
1.0 Mark(s)
8. In _____________ transmission, data are transmitted in both ways simultaneously.
a. duplex
b. half duplex
c. full duplex
d. simplex
1.0 Mark(s)
9. To decode 2048 locations, in memory _____________ address lines are needed.
a. 10
b. 11
c. 12
d. 1024
1.0 Mark(s)
10. DMA stands for _____________.
a. Digital Memory Address
b. Digital Mobile Access
c. Direct Mapping ALU
d. Direct Memory Access
1.0 Mark(s)

11. a. Write short notes on 8085 registers.

Or

b. elaborate the basic concepts in memory interfacing?
5.0 Mark(s)

12. a. discuss the functions of the 4 rotation instructions.

Or

b. define BCD-to-Seven-Segment-LED code conversion.
5.0 Mark(s)

13. a. discuss the basic circuit of a D/A converter.

Or

b. Write about the priority modes, EOI command on 8259A.
5.0 Mark(s)

14. a. explain about the keyboard with key check subroutine.

Or

b. discuss the serial I/O lines of 8085 with their instructions.
5.0 Mark(s)

15. a. Illustrate the interfacing circuit of scanned display.

Or

b. Write a note on single-chip microcontroller.
5.0 Mark(s)

16. a. Draw a block diagram of a microprocessor based system and discuss the functions of every component.

Or

b. define the functions of different pins of the 8085 microprocessor.
8.0 Mark(s)

17. a. Write a note on instruction classification and instruction format.

Or

b. Write short notes on subroutines.
8.0 Mark(s)

18. a. discuss about the concepts behind A/D converters.

Or

b. List the operating modes of 8254 timer. Write instructions to set up the timer in the different modes.
8.0 Mark(s)

19. a. discuss the mode O operation of 8255 PPI.

Or

b. discuss how data transfer occurs in the serial I/O mode.
8.0 Mark(s)

20. a. Write short notes on memory design.

Or

b. define important features of 16-bit microprocessors.
8.0 Mark(s)

Earning:   Approval pending.