Allfon Edge Technical and Electronics Questions
- It is required to construct a counter to count up to 100 (decimal). The minimum number of flip-flops required to construct the counter is:
(a) 8
(b) 7
(c) 6
(d) 5
(Ans: A) - A highly stable resonance characteristic is the property of a ____ oscillator:
(a) Hartley
(b) Colpitts
(c) Crystal
(d) Weinbridge
(Ans: C) - The width of the depleted region of a PN junction is of the order of a few tenths of a ___________:
(a) millimeter
(b) micrometer
(c) meter
(d) nanometer
(Ans: B) - In negative feedback, the return ratio is ___________:
(a) 0
(b) 1
(c) greater than 0
(d) greater than 1
(Ans: C)Explanation: In a negative feedback circuit, the return ratio will always be in the range of 0 to 1.
- A phase shift oscillator uses __________________:
(a) LC tuning
(b) Piezoelectric crystal
(c) Balanced bridge
(d) Variable frequency operation
(Ans: C) - Transistor is a:
(a) Current controlled current device
(b) Current controlled voltage device
(c) Voltage controlled current device
(d) Voltage controlled voltage device
(Ans: A)Explanation: The output current depends on the input current.
- A bistable multivibrator is a:
(a) Free running oscillator
(b) Triggered oscillator
(c) Saw tooth wave generator
(d) Crystal oscillator
(Ans: B)
Sample Test Paper
- What is big-endian?
(a) MSB at lower address, LSB at higher address
(b) LSB at lower address, MSB at higher address
(c) Memory management technique
(d) None of the above
(Ans: A)