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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.
| 2501. |
Which of the following is susceptible to race condition? |
| A. | R-S latch |
| B. | D latch |
| C. | Both R - S and D latches |
| D. | None of the above |
| Answer» B. D latch | |
| 2502. |
An exponential amplifier has diode in feedback path. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2503. |
A transistor with a = 0.9 and ICBO = 10 A is biased so that IBQ = 90 A. Then ICQ will be |
| A. | 910 mA |
| B. | 5 mA |
| C. | 5.25 mA |
| D. | 4.95 mA |
| Answer» B. 5 mA | |
| 2504. |
It is desired to reduce distortion in an amplifier from 8% to 2% by using 5% negative feedback. The open and closed loop gains respectively are |
| A. | 60 and 15 |
| B. | 15 and 60 |
| C. | 6 and 1.5 |
| D. | 1.5 and 6 |
| Answer» B. 15 and 60 | |
| 2505. |
A bridge rectifier circuit has a dc load current of 10 mA and a filter capacitance of 1000 F. The peak to peak ripple voltage is |
| A. | 0.01 V |
| B. | 0.05 V |
| C. | 0.1 V |
| D. | 0.5 V |
| Answer» D. 0.5 V | |
| 2506. |
For an ideal noise free transistor amplifier the noise factor is |
| A. | zero |
| B. | zero dB |
| C. | 1 dB |
| D. | depends on other factors |
| Answer» C. 1 dB | |
| 2507. |
An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. What percentage of feedback will cause oscillations? |
| A. | 0.1% |
| B. | 0.5% |
| C. | 1% |
| D. | 2% |
| Answer» E. | |
| 2508. |
Class A and Class B power amplifiers predominate at |
| A. | audio frequencies |
| B. | radio frequencies |
| C. | all frequencies |
| D. | audio and radio frequency |
| Answer» B. radio frequencies | |
| 2509. |
Which of the following is not valid in case of FETs? |
| A. | It has low voltage gain |
| B. | It has high input impedance |
| C. | It has fast switching time |
| D. | It is voltage controlled device |
| Answer» D. It is voltage controlled device | |
| 2510. |
Which of the following configuration has low thermal stability? |
| A. | CB |
| B. | CC |
| C. | CE |
| D. | All have identical thermal stability |
| Answer» B. CC | |
| 2511. |
Occasionally a discrete amplifier user RF chokes instead of collector resistors. Such amplifiers are inherently |
| A. | low pass amplifiers |
| B. | high pass amplifiers |
| C. | band pass amplifiers |
| D. | none of the above |
| Answer» C. band pass amplifiers | |
| 2512. |
A capacitor input filter relies on |
| A. | average detection |
| B. | peak detection |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» C. both (a) and (b) | |
| 2513. |
Examine the circuit of figure and the following statements Vs is more than the zener breakdown voltage.IL = I1 - I2.Rs is less than zener nominal resistance. Which of the above statements are correct? |
| A. | 1, 2, 3 |
| B. | 1, 2 |
| C. | 1 only |
| D. | 2 and 3 |
| Answer» C. 1 only | |
| 2514. |
Which amplifier has the higher power gain? |
| A. | Common emitter |
| B. | Common collector |
| C. | Common base |
| D. | Both CC and CE |
| Answer» B. Common collector | |
| 2515. |
Which class of amplifiers operates with least distortion? |
| A. | Class A |
| B. | Class B |
| C. | Class C |
| D. | Class AB |
| Answer» B. Class B | |
| 2516. |
The main drawback in the performance of shunt peaked wide band amplifier is |
| A. | two low gain at low frequency |
| B. | poor phase response |
| C. | reduce frequency at middle frequency |
| D. | that the maximum gain of the stage is small |
| Answer» C. reduce frequency at middle frequency | |
| 2517. |
For the circuit of figure the input and output Miller resistances are |
| A. | 5 kΩ each |
| B. | 1 ohm and 5 kΩ respectively |
| C. | 5 kΩ and 1 ohm respectively |
| D. | 1 ohm each |
| Answer» C. 5 kΩ and 1 ohm respectively | |
| 2518. |
When microprocessor processes both positive and negative numbers, the representation used is |
| A. | l's complement |
| B. | 2's complement |
| C. | signed binary |
| D. | any of the above |
| Answer» C. signed binary | |
| 2519. |
A compiler is a software programme which |
| A. | change high level Programming language into low level machine language |
| B. | change the program into binary form |
| C. | assembles the program |
| D. | executes the program |
| Answer» B. change the program into binary form | |
| 2520. |
How many JK flip-flops are needed to make a 4-bit shift register? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 2521. |
A half adder adds __________ bits and a full adder adds __________ bits. |
| A. | two, three |
| B. | three, four |
| C. | four, six |
| D. | two, four |
| Answer» B. three, four | |
| 2522. |
A 555 timer can be used as |
| A. | an astable multivibrator |
| B. | monostable multivibrator |
| C. | frequency Divider only |
| D. | any of the above |
| Answer» E. | |
| 2523. |
In a Karnaugh map for an expression having 'don't care terms' the don't cares can be treated as |
| A. | 0 |
| B. | 1 |
| C. | 1 or 0 |
| D. | none of the above |
| Answer» D. none of the above | |
| 2524. |
Which of the following is coincidence logic circuit? |
| A. | <img src="/_files/images/electronics-and-communication-engineering/digital-electronics/22-260-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/digital-electronics/22-260-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/digital-electronics/22-260-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/digital-electronics/22-260-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/digital-electronics/22-260-2.png"> | |
| 2525. |
The circuit in the given figure is |
| A. | half adder |
| B. | full adder |
| C. | half subtractor |
| D. | full subtractor |
| Answer» B. full adder | |
| 2526. |
7483 is a TTL binary adder. It can add |
| A. | two 4-bit binary numbers |
| B. | four 6-bit binary numbers |
| C. | four 8-bit binary numbers |
| D. | any number of 4-bit numbers |
| Answer» B. four 6-bit binary numbers | |
| 2527. |
Mark the false statement: |
| A. | since wave-shape of a digital signal is unimportant, linear amplifiers are not required |
| B. | the precise amplitude of a digital signal is also unimportant provided two voltage levels (0 and 1) are quite different |
| C. | the leading and trailing edges of a digital signal need not be sharp |
| D. | actual digital waves have rise and fall times of the order of a few nano seconds |
| Answer» D. actual digital waves have rise and fall times of the order of a few nano seconds | |
| 2528. |
The address to which a software or hardware restart branches is known as |
| A. | Vector location |
| B. | SID |
| C. | SOD |
| D. | TRAP |
| Answer» B. SID | |
| 2529. |
Consider the following digital circuits: MultipliersRead only memoriesD-latchCircuits as shown Which of these come under the class of combinational circuit? |
| A. | 1 and 2 |
| B. | 3 and 4 |
| C. | 1, 2 and 3 |
| D. | 1, 2, 3 and 4 |
| Answer» B. 3 and 4 | |
| 2530. |
What is the maximum output voltage from the 741 op-amp? |
| A. | Zero |
| B. | Approximately 1 V |
| C. | Approximately 3 V |
| D. | Approximately 5 V |
| Answer» E. | |
| 2531. |
Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after ACI 0 A4 H? |
| A. | 4 AH, 0 |
| B. | 4 AH, 1 |
| C. | 4 BH, 0 |
| D. | 4 BH, 1 |
| Answer» E. | |
| 2532. |
Consider the following Maximum energy of electrons liberated photoelectrically is independent of light intensityMaximum energy of electrons liberated photoelectrically varies nonlinearly with frequency of incident light. |
| A. | (1) is true and (2) is false |
| B. | (1) and (2) both are true |
| C. | (1) is false and (2) is true |
| D. | (1) and (2) both are false |
| Answer» B. (1) and (2) both are true | |
| 2533. |
What are the values of Emax and Emin displayed on the oscilloscope, when a 1 kV P-P carries is modulated to 50%? |
| A. | 2 kV, 0.5 kV |
| B. | 1 kV, 0.5 kV |
| C. | 0.75 kV, 0.25 kV |
| D. | 0.5 kV, 1.5 kV |
| Answer» D. 0.5 kV, 1.5 kV | |
| 2534. |
The equation sin (z) = 10 has |
| A. | no real or complex solution |
| B. | exactly two distinct complex solutions |
| C. | a unique solution |
| D. | an infinite number of complex solutions |
| Answer» B. exactly two distinct complex solutions | |
| 2535. |
The logic function f(A B, C) = m(0, 2, 4, 5, 6) represented by |
| A. | i |
| B. | i, ii |
| C. | i, iii |
| D. | i, ii, iii |
| Answer» C. i, iii | |
| 2536. |
In the given figure.The damping coefficient for the given circuit is __________ . |
| A. | 1/2 |
| B. | 1/4 |
| C. | 2 |
| D. | 1 |
| Answer» B. 1/4 | |
| 2537. |
For the network shown below, if VD = 12 V and VGSQ = - 2 V value of RS will be |
| A. | 13.35 k |
| B. | 3.35 k |
| C. | 33.31 k |
| D. | 3.95 k |
| Answer» C. 33.31 k | |
| 2538. |
A parallel plate capacitor has surface density of rs C/m2. The dielectric inside capacitor is air. The electric field intensities outside and inside the capacitor are |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-04-50-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-04-50-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-04-50-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-04-50-4.png"> |
| Answer» E. | |
| 2539. |
One of a loss-less transmission line having the characteristic impedance of 75 and length of 1cm is short-circuit. At 3 GHz, the input impedance at the other end of the transmission line is |
| A. | 0 |
| B. | resistive |
| C. | capacitance |
| D. | inductive |
| Answer» E. | |
| 2540. |
In the circuit shown, all the transmission line sections are lossless. The Voltage Standing Wave Ration (VSWR) on the 60W line is |
| A. | 1.00 |
| B. | 1.64 |
| C. | 2.50 |
| D. | 3.00 |
| Answer» C. 2.50 | |
| 2541. |
Total electric field intensity is given as (V/m). The maximum value of will occur; if and only if |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-41-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-41-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-41-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-41-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/3-03-41-3.png"> | |
| 2542. |
Which of the following algorithms design techniques is used in quick sort algorithm? |
| A. | Dynamic programming |
| B. | Backtracking |
| C. | Divide and conquer |
| D. | Greedy |
| Answer» D. Greedy | |
| 2543. |
The cross section of a JFET is shown in the following figure. Let Va be - 2 V and let Vp be the initial pinch-off voltage. If the width W is doubled (with other geometrical parameters and doping levels remaining the same), then the ratio between the mutual transconductances of the initial and the modified JFET is |
| A. | 4 |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-07-52-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-07-52-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-07-52-4.png"> |
| Answer» D. <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/5-07-52-4.png"> | |
| 2544. |
Consider the following statements regarding registers and latches: Registers are made of edge-triggered FFs, whereas latches are made from level-triggered FFs. Registers are temporary storage devices whereas latches are not. A latch employs cross-coupled feedback connections. A register stores a binary word whereas a latch does not. Which of the above statements is/are correct? |
| A. | 1 only |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 3 and 4 |
| Answer» C. 2 and 3 | |
| 2545. |
Which one of the following is a regulated power supply? |
| A. | IC 555 |
| B. | IC 844 |
| C. | IC 3080 |
| D. | IC 723 |
| Answer» E. | |
| 2546. |
Which of the following materials in not an insulator? |
| A. | Diamond |
| B. | Graphite |
| C. | Bakelite |
| D. | Lucite |
| Answer» C. Bakelite | |
| 2547. |
Which are of the following oscillators is well suited for the generation of wide range audio-frequency sine waves? |
| A. | RC phase-shift oscillator |
| B. | Wien-bridge oscillator |
| C. | Colpitts oscillator |
| D. | Hartley oscillator |
| Answer» C. Colpitts oscillator | |
| 2548. |
Which of the following is/are correct statement(s)? Bus is a group of wires carrying information.Bus is needed to achieve reasonable speed of operation.Bus can carry data or address.A bus can be shared by more than one device. Select the correct answer from the codes given below |
| A. | 1 only |
| B. | 1 and 2 only |
| C. | 2, 3 and 4 only |
| D. | 1, 2, 3 and 4 |
| Answer» E. | |
| 2549. |
The input to a binary communication system, denoted by a random variable x, takes on one of the two values 0 or 1 with probabilities and . The behaviour of the communication system is modelled byP(Y = 1 |x = 1|) = and P(Y = 0|x = 0) = Find P(Y = 1) |
| A. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-04-44-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-04-44-2.png"> |
| C. | 1 |
| D. | <img src="/_files/images/electronics-and-communication-engineering/exam-question-papers/11-04-44-4.png"> |
| Answer» C. 1 | |
| 2550. |
A certain network has two ideal voltages sources and a large number of ideal resistances. The power consumed in one of the resistances is 4 W when either of two sources is active and the other source is active and the other source is short circuited. When both sources is short circuited.When both sources are active, the power consumed in the same resistor would be |
| A. | zero or 16 W |
| B. | 4 W or 8 W |
| C. | zero or 8 W |
| D. | 8 W or 16 W |
| Answer» B. 4 W or 8 W | |