Prepare for ISRO ICRB examinations with verified solutions covering Algorithms, Theory of Computation, Compiler Design, Computer Architecture, OS, Discrete Mathematics, and Computer Networks.
Marking scheme: +3.00 positive, -0.75 negative (ICRB Standard).
Which of the following statements with reference to a generic microprocessor is correct?
An electric iron designed for 110V AC supply was rated at 500W. It was put across a 220V supply. Assuming that at 110V it supplied 500W output (i.e no losses) at the new voltage it will supply
A very lossy, $\lambda/4$ long, 50 ohm transmission line is open circuited at the load end. The input impedance measured at the other end of the line is approximately.
For the 2N338 transistor, the manufacturer specifies $P_{\max} = 100\text{mW}$ at $25^\circ\text{C}$ free air temperature and the maximum junction temperature, $T_{j\max} = 125^\circ\text{C}.$ Its thermal resistance is
In a Class AB amplifier, the current flows through the active device for
Which of the following is not true regarding a preemptive kernel
The solution of differential equation $dy/dx = e^{x-y} + x^2 e^{-y}$ is
The intermediate frequency of a super-heterodyne receiver is 450 KHz. If it is tuned to 1200 KHz, the image frequency will be
The bandwidth of a 'N' bit binary coded PCM signal for modulating a signal having bandwidth of 'f' Hz is
Go-stationary satellites are placed in equatorial orbits at the height approximately
For a single mode optical cable with 0.25dB/km loss, the optical power 100km from a 0.1mW source will be
The function of a strobe function in digital system is
The impulse response of a linear time invariant system is $h(n) = \{1, \underline{2}, 1, -1\}$. The response for the input signal $x(n) = \{\underline{1}, 2, 3, 1\}$ is
Which of the following statement regarding a constant is not true
In a 8085 microprocessor system with memory mapped I/O
The Thevenin and Norton circuits are
A broadside array operating at 100 cm wavelength consist of 4 half wave dipoles spaced 50 cm apart. Each element carries radio frequency current in the same phase and of magnitude 0.5A. The radiated power will be _____ if the radiation resistance is 146 ohm.
An NPN transistor has a beta cut off frequency $f_\beta$ of 1MHz, and a common emitter short circuit low frequency current gain $\beta_0$ of 200. its unity gain frequency $f_T$ and the alpha cut-off frequency $f_\alpha$ respectively are
For a class B amplifier providing a 20V peak signal to 16 ohm load and a power supply of $V_{cc} = 30\text{V}$ the efficiency will be.
When a microprocessor interfaces with a peripheral or memory device, the normal timing of the microprocessor may need to be altered by introducing
$$\int_{0}^{\pi/2} (\cos^3 x) \, dx =$$
In phase modulated signal, the frequency deviation is proportional to
For a fast communication which of the following requirements have to be met
For an earth station transmitter input power of 40dBW (10,000W), with a back off loss of 3dB, a total branching and feeder loss of 3dB, and a transmit antenna gain of 40 dB, determine the EIRP.
_____ is used to describe the light gathering or light collecting ability of an optical fiber