Legal Metrology ā¢ Paper-III
A pulse train can be delayed by a finite number of clock periods using
A)
A serial-in-serial-out shift register
B)
A serial-in-parallel-out shift register
C)
A parallel-in-serial-out shift register
D)
A parallel-in-parallel-out shift register
Correct option: A ā A serial-in-serial-out shift register. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
In TM mode, if the direction of wave propagation is in āzā direction, then:
A)
H = 0
B)
E = 0
C)
H = 0 (in Y Z plane)
D)
E = 0 (in Z Y plane)
A TM mode has no longitudinal magnetic-field component, so Hz=0.
Legal Metrology ā¢ Paper-III
Quantization process used in analog to digital conversion process is a
A)
One-to-many mapping which causes loss of information
B)
Many -to-one mapping which causes loss of information
C)
One-to-one mapping
D)
Many-to-one mapping where the loss of information at the transmitter cannot be recovered at the receiver
Correct option: B ā Many -to-one mapping which causes loss of information. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
8085 has five flags they are designated as
A)
Z, CY, S, P and AC
B)
CY, D, Y, S and P
C)
CY, AC, D, E, and P
D)
S, P, D, E and Y
TRAP is the highest-priority 8085 interrupt.
Legal Metrology ā¢ Paper-III
A semiconductor ROM is preferred to a semiconductor RAM because
A)
ROM is cheaper than RAM
B)
ROM is faster
C)
Rom does not require power supply for their operations
D)
Programme stored in the ROM cannot be altered
Correct option: A ā ROM is cheaper than RAM. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
Microwave signal propagating along the curvature of earth is known as
A)
Faraday effect
B)
Ducting
C)
Ionosphere reflection
D)
Tropospheric scatter
Correct option: B ā Ducting. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
Modulation is primarily accomplished to
A)
Produce sidebands
B)
Mix two waves of different frequencies
C)
Transmit audio-frequency signals over long distances
D)
Improve transmission efficiency
Correct option: C ā Transmit audio-frequency signals over long distances. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
Medium waves travel as
A)
Space waves
B)
Surface waves
C)
Sky waves
D)
None of these
Correct option: B ā Surface waves. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
The distortion in the transmission of carrier frequencies in an underground cable can be eliminated by using
A)
Inductive loading
B)
Resistive loading
C)
Capacitive loading
D)
Shielding
Correct option: A ā Inductive loading. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
Four memory chips of 16 x 4 sizes have their address bus connected together. This system will be of size
A)
64Ć4
B)
16Ć16
C)
32Ć8
D)
256Ć1
Correct option: B ā 16Ć16. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
Frequency bands under microwave frequency are
A)
SHF and EHF
B)
VHF and SHF
C)
VLF, LF and EHF
D)
UHF, SHF and EHF
Correct option: D ā UHF, SHF and EHF. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
Processors of all computers, whether micro, mini or mainframe must have
A)
Control unit
B)
Primary storage
C)
ALU
D)
All of the above
Correct option: D ā All of the above. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
How many distinct binary trees can be constructed using three nodes?
A)
1
B)
2
C)
3
D)
5
Correct option: D ā 5. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
In a computer, set of electrical paths which is used to transfer data is called
A)
Ports
B)
Monitors
C)
Bus
D)
Computer clock
Every path is a trail because a path does not repeat vertices and therefore cannot repeat edges.
Legal Metrology ā¢ Paper-III
Which of the following is not a kind of register?
A)
Math processor
B)
Flag
C)
Accumulator
D)
Segment
Correct option: A ā Math processor. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-III
Convert the following number system: (743)8 = (?)10
A)
483
B)
773
C)
373
D)
479
7Ć64 + 4Ć8 + 3 = 483.
Legal Metrology ā¢ Paper-III
The initial content of a four bit register is 1000. What is the register content after it is shifted four times to the right, with the serial input being 111100?
A)
1111
B)
1100
C)
1000
D)
0011
12 is greater than 9, so A>B=1 while A<B=0 and A=B=0.
Legal Metrology ā¢ Paper-III
In 8085, if the clock frequency is 5 MHz, the time required to execute an instruction of 18 T-states is
A)
3.0 Āµs
B)
3.6 Āµs
C)
4.0 Āµs
D)
6.0 Āµs
TRAP is the highest-priority 8085 interrupt.
Legal Metrology ā¢ Paper-III
Convert the following number system: (101101)2 = (?)10
A)
35
B)
25
C)
45
D)
55
Binary 101101 equals 32+8+4+1=45.
Legal Metrology ā¢ Paper-III
In 8085 microprocessor system with memory mapped I/O, which of the following is true?
A)
Devices have 8-bit address line
B)
Devices are accessed using IN and OUT instructions
C)
There can be maximum of 256 input devices and 256 output devices
D)
Arithmetic and logic operations can be directly performed with the I/O data
TRAP is the highest-priority 8085 interrupt.
Legal Metrology ā¢ Paper-III
An 8085 microprocessor based system uses a 4K x 8-bit RAM whose starting address is AA00H. The address of the last byte in this RAM is
A)
0FFFH
B)
1000H
C)
B9FFH
D)
BA00H
TRAP is the highest-priority 8085 interrupt.
Legal Metrology ā¢ Paper-II
For an electric field E = E0 Sin wt, what is the phase difference between the conduction current and the displacement current?
A)
30Ā°
B)
45Ā°
C)
60Ā°
D)
90Ā°
Correct option: D ā 90Ā°. This matches the standard definition/result for the stated question.
Legal Metrology ā¢ Paper-II
The emitter resistor RE is bypassed by a capacitor in order to
A)
Stabilize the Q point
B)
Cause thermal runaway
C)
Increase the voltage gain
D)
Reduce the voltage gain
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Increase the voltage gain' (Option C).
Legal Metrology ā¢ Paper-II
The Boolean function Y= AB + CD is to be realized using only 2 input NAND gates. The minimum number of gates required is
A)
2
B)
3
C)
4
D)
5
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '2' (Option A).
Legal Metrology ā¢ Paper-II
Which of the following is an example of volatile memory?
A)
ROM
B)
RAM
C)
PROM
D)
E2PROM
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'ROM' (Option A).
