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MCQOPTIONS
This section includes 9294 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 4751. |
The clear data and present input of the JK flip-flop are known as |
| A. | direct inputs |
| B. | synchronous inputs |
| C. | indirect inputs |
| D. | either direct inputs or synchronous inputs |
| Answer» E. | |
| 4752. |
The advantages of high density IC are |
| A. | more circuits on chip |
| B. | high operating speed |
| C. | low power consumption |
| D. | both (a) and (b) |
| Answer» E. | |
| 4753. |
The initial state of MOD-16 down counter is 011. After 37 clock pulses, the state of the counter will be |
| A. | 1011 |
| B. | 0110 |
| C. | 0101 |
| D. | 0001 |
| Answer» D. 0001 | |
| 4754. |
In a 4 bit weighted resistor D/A converter, resistor value corresponding to LSB is 32 k ohm. The resistor value corresponding to MSB is |
| A. | 32 k ohm |
| B. | 16 k ohm |
| C. | 8 k ohm |
| D. | 4 k ohm |
| Answer» E. | |
| 4755. |
In 8085 microprocessor, how many lines are there in address bus? |
| A. | 6 |
| B. | 8 |
| C. | 12 |
| D. | 16 |
| Answer» E. | |
| 4756. |
The code used to reduce the error due to ambiguity in reading of a binary optical encoder is |
| A. | Octal code |
| B. | Excess-3 code |
| C. | gray code |
| D. | BCD code |
| Answer» D. BCD code | |
| 4757. |
A transistor is operated as non-saturated switch to eliminate |
| A. | turn on time |
| B. | turn off time |
| C. | storage time |
| D. | delay time |
| Answer» C. storage time | |
| 4758. |
In a clocked latch, clock drives |
| A. | R NAND gate |
| B. | S NAND gate |
| C. | both R and S NAND gates |
| D. | either R or S NAND gates |
| Answer» D. either R or S NAND gates | |
| 4759. |
Vectored interrupt is an interrupt that takes the program to a vector location. TRAP vectors to 0024 FI, RST 7.5 to 003 CH, RST 6.5 to 0034 H and |
| A. | RST 5.5 |
| B. | RST 6.5 |
| C. | 24 H to 48 H |
| D. | RST 5.5 to 002 CH |
| Answer» E. | |
| 4760. |
The SID data received is |
| A. | LSB first |
| B. | LSB last |
| C. | 1 |
| D. | none of these |
| Answer» B. LSB last | |
| 4761. |
Which has the lowest propagation delay time? |
| A. | ECL |
| B. | TTL |
| C. | CMOS |
| D. | PMOS |
| Answer» B. TTL | |
| 4762. |
Programmable logic array uses |
| A. | RAM matrices |
| B. | ROMs matrices |
| C. | PROM matrices |
| D. | Silo memory |
| Answer» C. PROM matrices | |
| 4763. |
A Schottky diode has |
| A. | no minority carriers and very low voltage drop in forward direction |
| B. | no minority carriers and very high voltage drop in forward direction |
| C. | large number of minority carriers and very high voltage drop in forward direction |
| D. | large number of minority carriers and very low voltage drop in forward direction |
| Answer» B. no minority carriers and very high voltage drop in forward direction | |
| 4764. |
Boolean algebra obeys |
| A. | commutative law |
| B. | associative law |
| C. | distributive law |
| D. | commutative, associative and distributive law |
| Answer» E. | |
| 4765. |
The figure of merit for a logic family is |
| A. | gain band width product |
| B. | (propagation delay time) (power dissipation) |
| C. | (fan out) (power dissipation) |
| D. | (noise margin) (power dissipation) |
| Answer» C. (fan out) (power dissipation) | |
| 4766. |
A universal register |
| A. | accepts serial input |
| B. | accepts Parallel input |
| C. | gives serial and Parallel output |
| D. | all of the above |
| Answer» E. | |
| 4767. |
The abbreviation DTL stands for |
| A. | Digital Timing Logic |
| B. | Diode Transistor Logic |
| C. | Dynamic Transient Logic |
| D. | Delayed Tracking Logic |
| Answer» C. Dynamic Transient Logic | |
| 4768. |
Which one of the following is a D to A conversion technique? |
| A. | Successive approximation |
| B. | Weighted resistor |
| C. | Dual slope |
| D. | Single slope |
| Answer» C. Dual slope | |
| 4769. |
If modulus is less than 2N, some states of the counter are skipped by using NAND gates. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4770. |
Two 16 : 1 and one 2 : 1 multiplexers can be connected to form a |
| A. | 16 : 1 multiplexer |
| B. | 32 : 1 multiplexer |
| C. | 64 : 1 multiplexer |
| D. | 8 : 1 multiplexer |
| Answer» C. 64 : 1 multiplexer | |
| 4771. |
In order to enable TRAP interrupt, which of the following instructions are needed? |
| A. | El only |
| B. | SIM only |
| C. | El and SIM both |
| D. | None |
| Answer» E. | |
| 4772. |
What are the contents of the accumulator after the RIC has been executed? |
| A. | 40 H |
| B. | 41 H |
| C. | 42 H |
| D. | 43 D |
| Answer» E. | |
| 4773. |
Assertion (A): In a magnitude comparator IC the cascading inputs provide a means to cascade the 4 bit comparators Reason (R): A magnitude comparator has three outputs, A = B, A > B and A < B |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is true, R is false |
| D. | A is false, R is true |
| Answer» C. A is true, R is false | |
| 4774. |
A microcomputer has a 64 K memory. What is the hexadecimal notation for the first memory location? |
| A. | 0000 |
| B. | FFFF |
| C. | 0FFF |
| D. | 3FFF |
| Answer» B. FFFF | |
| 4775. |
Binary 101010 is equivalent to decimal number |
| A. | 24 |
| B. | 42 |
| C. | 44 |
| D. | 64 |
| Answer» C. 44 | |
| 4776. |
How many flag are there in 8085 microprocessor? |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 4777. |
Each cell of a static RAM has |
| A. | 4 MOS transistors |
| B. | 4 MOS transistors and 2 capacitors |
| C. | 2 MOS transistors and two capacitors |
| D. | 1 MOS transistor and 1 capacitor |
| Answer» B. 4 MOS transistors and 2 capacitors | |
| 4778. |
Assertion (A): In a parallel in-serial out shift register data is loaded one bit-at a timeReason (R): A serial in-serial out shift register can be used to introduce a time delay. |
| A. | Both A and R are correct and R is correct explanation of A |
| B. | Both A and R are correct but R is not correct explanation of A |
| C. | A is true, R is false |
| D. | A is false, R is true |
| Answer» E. | |
| 4779. |
In an 8085 microprocessor, the instruction CMP B has been executed while the content of the accumulator is less than that of register B, As a result. |
| A. | carry flag will be set but zero flag will be reset |
| B. | carry flag will be reset but zero flag will be set |
| C. | both carry flag and zero flag will be reset |
| D. | both carry flag and zero flag will be set |
| Answer» B. carry flag will be reset but zero flag will be set | |
| 4780. |
Computers use thousands of flip-flops. To coordinate the overall action, a common signal is sent to all flip-flop known as |
| A. | debug signal |
| B. | toggle signal |
| C. | active signal |
| D. | clock signal |
| Answer» E. | |
| 4781. |
In a D-type latch EN = 1, D = 1, the O/P is |
| A. | 1 |
| B. | 0 |
| C. | don't care |
| D. | blocked |
| Answer» B. 0 | |
| 4782. |
Which has the highest power dissipation per gate? |
| A. | ECL |
| B. | TTL |
| C. | CMOS |
| D. | PMOS |
| Answer» B. TTL | |
| 4783. |
The polar plot for positive frequencies is shown below. The gain margin is |
| A. | - 8.02 dB |
| B. | 6.02 dB |
| C. | 5 dB |
| D. | none of these |
| Answer» E. | |
| 4784. |
Input and output impedance with feedback for voltage series feedback having A = -200, R1 = 10 k&ohm;, R0 = 50 k&ohm; and feedback factor = -0.2 will be |
| A. | 410 kΩ, 2050 kΩ |
| B. | 410 kΩ, 1.219 kΩ |
| C. | 0.243 kΩ, 2050 kΩ |
| D. | 0.24 kΩ, 1.219 kΩ |
| Answer» C. 0.243 kΩ, 2050 kΩ | |
| 4785. |
An FM transmitter delivers 80W to a load of 30 W when no modulation is present. The carrier is now frequency modulated by a single sinusoidal signal and the peak frequency deviation is so adjusted to make the amplitude of the second sideband is zero in the given output.J0(0, 0) = 1, J0(2, 4) = 0, J0(3.8) = - 0.4, J0(5.1)= - 0.1J1(2, 4) = 0.52, J1((3.8) = 0, J1(5.1) = - 0.33, J2(2.4) = 0.1J2(3.8)= 0.41, J2(5.1) = 0 The power in all the remaining sidebands is : |
| A. | 84 W |
| B. | 97.44 W |
| C. | 100 W |
| D. | 77.44 W |
| Answer» E. | |
| 4786. |
In a JK flip-flop, J is connected to Q and K is connected to Q outputs. The JK FF converts into a |
| A. | RS FF |
| B. | D FF |
| C. | T FF |
| D. | Clocked RS FF |
| Answer» C. T FF | |
| 4787. |
An infinite ladder is constructed with 1 and 2 resistors as shown below. Find i |
| A. | 8.1818 A |
| B. | 0 A |
| C. | 9 A |
| D. | cannot be determined |
| Answer» D. cannot be determined | |
| 4788. |
Consider the matrix The value of ep is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-27-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-27-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-27-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-27-4.png"> |
| Answer» E. | |
| 4789. |
Find current flowing through 1 H inductor at t = 0, at which switch 'S' is opened. |
| A. | 0 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» D. 5 | |
| 4790. |
The probability density function (PDF) of a random variable X is as shown belowThe corresponding cumulative distribution function (CDF) has the form |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-24-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-24-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-24-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-24-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-03-24-2.png"> | |
| 4791. |
The system with given pole-zero diagram is __________ |
| A. | Causal |
| B. | Anti-causal |
| C. | Both sided |
| D. | Cannot be determined |
| Answer» E. | |
| 4792. |
For the waveform shown below, the slew rate and full power bandwidth with respect to op-amp will be respectively |
| A. | 0.02 V/ sec, 1.59 KHz |
| B. | 0.04 V/ sec, 1.59 KHz |
| C. | 0.02 V/ sec, 3.58 KHz |
| D. | 0.02 V/ sec, 1.59 KHz |
| Answer» B. 0.04 V/ sec, 1.59 KHz | |
| 4793. |
In the derivation of expression for peak percent overshoot, , Which one the following conditions is NOT required? |
| A. | System is linear and time invariant |
| B. | The system transfer function has a pair of complex conjugate poles and no zeros. |
| C. | There is no transportation delay in the system. |
| D. | The system has zero initial conditions. |
| Answer» D. The system has zero initial conditions. | |
| 4794. |
In the interconnection of ideal sources shown in the figure, it is known that the 60V source is absorbing powerWhich of the following can be the value of the current source? |
| A. | 10 A |
| B. | 13 A |
| C. | 15 A |
| D. | 18 A |
| Answer» B. 13 A | |
| 4795. |
The causal system given below is __________ |
| A. | minimum phase |
| B. | maximum phase |
| C. | mixed phase |
| D. | none of these |
| Answer» B. maximum phase | |
| 4796. |
Find RL for maximum power transfer. |
| A. | 3 |
| B. | 1.125 |
| C. | 4.1785 |
| D. | None of these |
| Answer» B. 1.125 | |
| 4797. |
Given (224)r = The value of the radix 'r' is : |
| A. | 5 |
| B. | 6 |
| C. | 7 |
| D. | 10 |
| Answer» B. 6 | |
| 4798. |
Which factor determines whether the medium is free space, lossless dielectric, lossy dielectric or good conductor? |
| A. | Attenuation constant |
| B. | Constitutive parameters ( , , ) |
| C. | Loss tangent |
| D. | Reflection coefficient |
| Answer» D. Reflection coefficient | |
| 4799. |
Find RAB |
| A. | 2 |
| B. | 1.5 |
| C. | 3 |
| D. | None of the above |
| Answer» B. 1.5 | |
| 4800. |
Find equivalent capacitance if each capacitance is 1 F. |
| A. | 56 F |
| B. | 6/5 F |
| C. | 6/10 F |
| D. | 5/12 F |
| Answer» C. 6/10 F | |