A device which converts electrical energy in the form of a current into optical energy is called as ___________
a) Optical source
b) Optical coupler c) Optical isolator d) Circulator
a) Optical source
b) Optical coupler c) Optical isolator d) Circulator
Anonymous Quiz
42%
A
37%
B
21%
C
0%
D
The frequency of the absorbed or emitted radiation is related to difference in energy E between the higher energy state E2 and the lower energy state E1. State what h stands for in the given equation?
E = E2 - E1 = hf
E = E2 - E1 = hf
Anonymous Quiz
18%
Gravitation constant
67%
Planck's constant
6%
Permittivity
9%
Attenuation constant
The radiation emission process (emission of a proton at frequency) can occur in __________ ways.
a) Two
b) Three c) Four d) One
a) Two
b) Three c) Four d) One
Anonymous Quiz
40%
A
34%
B
11%
C
14%
D
Which process gives the laser its special properties as an optical source?
a) Dispersion
b) Stimulated absorption c) Spontaneous emission d) Stimulated emission
a) Dispersion
b) Stimulated absorption c) Spontaneous emission d) Stimulated emission
Anonymous Quiz
9%
A
23%
B
29%
C
40%
D
The lower energy level contains more atoms than upper level under the conditions of ________________
a) Isothermal packaging
b) Population inversion c) Thermal equilibrium d) Pumping
a) Isothermal packaging
b) Population inversion c) Thermal equilibrium d) Pumping
Anonymous Quiz
10%
A
29%
B
48%
C
13%
D
__________________ in the laser occurs when photon colliding with an excited atom causes the stimulated emission of a second photon.
a) Light amplification
b) Attenuation c) Dispersion d) Population inversion
a) Light amplification
b) Attenuation c) Dispersion d) Population inversion
Anonymous Quiz
45%
A
16%
B
23%
C
16%
D
A semiconductor laser crystal of length 5 cm, refractive index 1.8 is used as an optical source. Determine the frequency separation of the modes.
a) 2.8 GHz
b) 1.2 GHz c) 1.6 GHz d) 2 GHz
a) 2.8 GHz
b) 1.2 GHz c) 1.6 GHz d) 2 GHz
Anonymous Quiz
30%
A
26%
B
41%
C
4%
D
Longitudinal modes contribute only a single spot of light to the laser output.
a) True
b) False
a) True
b) False
Anonymous Quiz
95%
A
5%
B
Which memory storage is widely used in PCs and Embedded Systems?
a) EEPROM
b) Flash memory c) SRAM d) DRAM
a) EEPROM
b) Flash memory c) SRAM d) DRAM
Anonymous Quiz
25%
A
39%
B
28%
C
8%
D
How is the protection and security for an embedded system made?
a) Security chips
b) Memory disk security c) IPR d) OTP
a) Security chips
b) Memory disk security c) IPR d) OTP
Anonymous Quiz
25%
A
11%
B
50%
C
14%
D
Which of the following task swapping method is a better choice in the embedded systems design?
a) time slice
b) RMS c) cooperative multitasking d) pre-emptive
a) time slice
b) RMS c) cooperative multitasking d) pre-emptive
Anonymous Quiz
23%
A
12%
B
42%
C
23%
D
Which type of memory is suitable for low volume production of embedded systems?
a) Non-volatile
b) RAM c) Volatile d) ROM
a) Non-volatile
b) RAM c) Volatile d) ROM
Anonymous Quiz
32%
A
18%
B
39%
C
11%
D
Which activity is concerned with identifying the task at the final embedded systems?
a) scheduling
b) task-level concurrency management c) high-level transformation d) compilation
a) scheduling
b) task-level concurrency management c) high-level transformation d) compilation
Anonymous Quiz
19%
A
42%
B
23%
C
15%
D
How an embedded system communicate with the outside world?
a) Memory
b) Output c) Peripherals d) Input
a) Memory
b) Output c) Peripherals d) Input
Anonymous Quiz
7%
A
11%
B
68%
C
14%
D
Which level simulates the algorithms that are used within the embedded systems?
a) algorithmic level
b) switch level c) gate level d) circuit level
a) algorithmic level
b) switch level c) gate level d) circuit level
Anonymous Quiz
39%
A
29%
B
14%
C
18%
D
Which of the following helps in reducing the energy consumption of the embedded system?
a) emulator
b) debugger c) simulator d) compilers
a) emulator
b) debugger c) simulator d) compilers
Anonymous Quiz
22%
A
25%
B
41%
C
13%
D
What does MESI stand for?
a) modified exclusive system input
b) modifies embedded shared invalid c) modified exclusive shared invalid d) modified exclusive stale invalid
a) modified exclusive system input
b) modifies embedded shared invalid c) modified exclusive shared invalid d) modified exclusive stale invalid
Anonymous Quiz
37%
A
37%
B
17%
C
9%
D
Which of the following is the pin efficient method of communicating between other devices?
a) memory port
b) peripheral port c) parallel port d) serial port
a) memory port
b) peripheral port c) parallel port d) serial port
Anonymous Quiz
11%
A
47%
B
21%
C
21%
D
What is approximate data access time of SRAM?
a) 2ns
b) 10ns c) 60ns d) 4ns
a) 2ns
b) 10ns c) 60ns d) 4ns
Anonymous Quiz
28%
A
41%
B
15%
C
15%
D