Legal Metrology • Paper-I
In which region a transistor acts as an open switch?
A)
cut off region
B)
inverted region
C)
active region
D)
saturated region
A transistor in cutoff carries essentially no current and behaves as an open switch.
Legal Metrology • Paper-I
If the n-MOS and p-MOS of the CMOS inverters are interchanged the output is measured at:
A)
Source of the both transistor
B)
Drains of the both transistor
C)
Drain of n-MOS and source of p-MOS
D)
Source of n-MOS and drain of p-MOS
Correct option: B — Drains of the both transistor. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
DeMorgan’s theorem states that
A)
(AB)’ = A’ + B’
B)
(A + B)’ = A’ * B
C)
A’ + B’ = A’B’
D)
None of these
Correct option: A — (AB)’ = A’ + B’. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
What is the need for a circular queue?
A)
effective usage of memory
B)
easier computations
C)
all of these
D)
none of these
Correct option: A — effective usage of memory. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
A __________ point of a fuzzy set A is a point x X at which µA(x) = 0.5
A)
Core
B)
Support
C)
Cross-over
D)
a-Cut
The crossover point is where membership grade equals 0.5.
Legal Metrology • Paper-I
In a comparator, if we get input as A>B then the output will be
A)
1
B)
0
C)
A
D)
B
12 is greater than 9, so A>B=1 while A<B=0 and A=B=0.
Legal Metrology • Paper-I
The base emitter voltage in a cut off region of silicon transistor is__________
A)
greater than 0.7V
B)
equal to 0.7V
C)
less than 0.7V
D)
cannot be predicted
A transistor in cutoff carries essentially no current and behaves as an open switch.
Legal Metrology • Paper-I
Can a DFA recognize a palindrome number?
A)
Yes
B)
No
C)
Yes, with input alphabet as S*
D)
Can’t be determined
Correct option: B — No. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
Which of the architecture is power efficient?
A)
CISC
B)
RISC
C)
ISA
D)
IANA
Correct option: B — RISC. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
The main advantage of multiple bus organisation over single bus is __________
A)
Reduction in the number of cycles for execution
B)
Increase in size of the registers
C)
Better Connectivity
D)
None of these
Correct option: A — Reduction in the number of cycles for execution. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
QuickSort can be categorized into which of the following?
A)
Brute Force technique
B)
Divide and conquer
C)
Greedy algorithm
D)
Dynamic programming
QuickSort recursively partitions the problem, following divide-and-conquer.
Legal Metrology • Paper-I
Which of the following statements accurately represents the two BEST methods of logic circuit simplification?
A)
Karnaugh mapping and circuit waveform analysis
B)
Boolean algebra and Karnaugh mapping
C)
Actual circuit trial and error evaluation and waveform analysis
D)
Boolean algebra and actual circuit trial and error evaluation
Boolean algebra and Karnaugh maps are the two standard simplification methods.
Legal Metrology • Paper-I
Which of the following is a type of error associated with digital-to-analog converters (DACs)?
A)
nonmonotonic error
B)
incorrect output codes
C)
offset error
D)
nonmonotonic and offset error
Correct option: D — nonmonotonic and offset error. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
Simplify Y = AB’ + (A’ + B)C
A)
AB’ + C
B)
AB + AC
C)
A’B + AC’
D)
AB + A
Correct option: A — AB’ + C. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
Transistor–transistor logic (TTL) is a class of digital circuits built from
A)
Transistors only
B)
Bipolar junction transistors (BJT)
C)
Resistors
D)
Bipolar junction transistors (BJT) and resistors
Unused TTL inputs should not float; they are tied to the appropriate logic level.
Legal Metrology • Paper-I
Which of the following statements apply to CMOS devices?
A)
The devices should not be inserted into circuits with the power on.
B)
All tools, test equipment, and metal workbenches should be tied to earth ground.
C)
The devices should be stored and shipped in antistatic tubes or conductive foam.
D)
All of these
CMOS devices are ESD-sensitive and require antistatic handling; all listed precautions apply.
Legal Metrology • Paper-I
Which of the following summarizes the important features of ECL?
A)
Low noise margin, low output voltage swing, negative voltage operation, fast, and high power consumption
B)
Good noise immunity, negative logic, high frequency capability, low power dissipation, and short propagation time
C)
Slow propagation time, high frequency response, low power consumption, and high output voltage swings
D)
Poor noise immunity, positive supply voltage operation, good low frequency operation, and low power
ECL has low voltage swing, negative supply operation, high speed, and high power dissipation.
Legal Metrology • Paper-I
How many two-input AND and OR gates are required to realize Y = CD+EF+G?
A)
2, 2
B)
2, 3
C)
3, 3
D)
None of these
Correct option: A — 2, 2. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
A BCD counter is a __________.
A)
binary counter
B)
full-modulus counter
C)
decade counter
D)
divide-by-10 counter
Correct option: C — decade counter. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
For an undirected graph G with n vertices and e edges, the sum of the degrees of each vertex is
A)
ne
B)
2n
C)
2e
D)
en
A complete undirected graph has n(n−1)/2 edges.
Legal Metrology • Paper-I
The set of all Equivalence classes of a set A of cardinality C
A)
forms a partition of A
B)
is of cardinality 2C
C)
has the same cardinality as A
D)
none of these
Correct option: A — forms a partition of A. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
A CPU has 24-bit instructions. A program starts at address 300 (in decimal). Which one of the following is a legal program counter (all values in decimal)?
A)
400
B)
500
C)
600
D)
700
Correct option: C — 600. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
A serial in/parallel out, 4-bit shift register initially contains all 1s. The data nibble 0111 is waiting to enter. After four clock pulses, the register contains __________.
A)
0000
B)
1111
C)
0111
D)
1000
After four shifts, the incoming 0111 nibble occupies the register.
Legal Metrology • Paper-I
How many address lines are needed to address each memory locations in a 2048×4 memory chip?
A)
10
B)
11
C)
8
D)
12
Correct option: B — 11. This matches the standard definition/result for the stated question.
Legal Metrology • Paper-I
The switching of power with a PNP transistor is called__________
A)
sourcing current
B)
sinking current
C)
forward sourcing
D)
reverse sinking
Correct option: A — sourcing current. This matches the standard definition/result for the stated question.
