STLD viva questions

STLD II Mid BITS

NOTE: Don't think that these bits only will be repeated in II mid. Prepare concepts well then go through the bits.

STLD

SECOND MID BITS 

UNIT-5(Programmable Logic devices)

1. In programmable logic array [ c ]

(a) AND –array is fixed &OR- array is programmable (b) AND-array is programmable & OR-array is fixed (c) both AND &OR array are programmable (d) both AND &OR array are fixed

2. Total no.of programmable fuses in ‘n’ input ‘m’ output PROM is [ c ]

(a) n (b) nXm (c) 2nXm (d) 2mXn

3. Programming a PLD device means [ b ]

(a) writing software program (b) blowing electronic fuses

(c) writing assembly language program (d) writing C program

4. When power supply of ROM is switched off, its contents [ c]

(a) becomes zero (b) becomes all ones (c) remains same (d) are unpredictable

5. The Programmable Array Logic consists of [ d ]

a) fixed OR and AND gates b) Programmable OR , fixed AND gates

c) Programmable OR and AND gates d) Programmable AND , fixed OR gates

6. Four RAM chips of 16×4 size have their busses connected together. This system will be of size

[ c]

a) 16×4 b) 256×1 c) 16×16 d) 32×8

7. The parameters of a threshold element are [ a]

a) weights assigned to input variable s and T b) output variables

c) weights assigned to input variables d) value of T

8. The address bus with a ROM of size 1024*8 bits is [ b]

a)8 bits b) 10 bits c) 12 bits d) 16 bits

9. The ROM programmed during manufacturing process itself is called [ a ]

a)MROM (b) PROM (c) EPROM (d) EEPROM

10. A memory in which the contents get erased when power failure occurs is [ d ]

a)EAROM (b) PROM (c) ROM (d) RAM

11. A single literal term in SOP expression [ b ]

a)Requires an inverter for PLA implementation

b)Requires an AND gate for PLA implementation

c)Doesn’t requires an AND gate for PLA implementation

d) Doesn’t requires an inverter for PLA implementation

SECTION-II: FILL IN THE BLANKS 

1. In a positive unite function all the variables are only in Un complemented form.

2. Non threshold functions cannot be realized using a single threshold gate.

3. A PLA consists of AND, OR and invert / non invert matrix

4. A ROM has 32K×8 organization. Its capacity in bits is 256 KB

5. The number of outputs of a threshold element is 1

6. A combinational PLD with programmable AND array and programmable OR array is called as PLA

7. The full form of PROM is programmable read only memory.