MCQOPTIONS
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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.
| 8601. |
Radar principle is used in |
| A. | detection of aircraft |
| B. | burglar alarms |
| C. | garage door openers |
| D. | all of the above |
| Answer» E. | |
| 8602. |
In an optional fiber the refractive index of cladding material should be |
| A. | nearly 1 |
| B. | very low |
| C. | less than that of core |
| D. | more than that of core |
| Answer» D. more than that of core | |
| 8603. |
Assertion (A): Microprocessor 8085 has on-chip oscillator with inbuilt crystal.Reason (R): For frequency stability crystal oscillator is preferred. |
| 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 correct R is wrong |
| D. | A is wrong R is correct |
| Answer» E. | |
| 8604. |
In a microprocessor |
| A. | all instructions need only one machine cycle |
| B. | some instructions need only one machine cycle while some other instructions need more than one machine cycle |
| C. | all instructions need only fraction of one machine cycle |
| D. | some instructions need less than one machine cycle |
| Answer» C. all instructions need only fraction of one machine cycle | |
| 8605. |
Consider the following program in Pascal X = 2.57X = (X + 0.06) * 10I = TRUNC (X)X = IX = X / 10.0 The final value of X would be |
| A. | 2 |
| B. | 2.6 |
| C. | 2.63 |
| D. | 26.3 |
| Answer» C. 2.63 | |
| 8606. |
Assertion (A): If source and destination addresses are made implicit the length of instruction is reduced.Reason (R): 8085 has only 3 addressing modes. |
| 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 correct R is wrong |
| D. | A is wrong R is correct |
| Answer» D. A is wrong R is correct | |
| 8607. |
Consider the following The first letter of a Java variable is lower case.Each successive word in Java variable begins with a capital letter.All other letters are lower case.A Java variable can have a digit as first character. Which of the above are correct? |
| A. | All |
| B. | 1, 2, 3 only |
| C. | 1, 2, 4 only |
| D. | 2, 3, 4 only |
| Answer» C. 1, 2, 4 only | |
| 8608. |
Most of the memory chips in static RAM |
| A. | do not require any supply |
| B. | need 2 V supply |
| C. | need 5 V supply |
| D. | need 12 V supply |
| Answer» D. need 12 V supply | |
| 8609. |
Which of the following real variable names is not valid in Fortran? |
| A. | BETA |
| B. | ALPHA |
| C. | A |
| D. | AB * 2 |
| Answer» E. | |
| 8610. |
Temporary register in 8085 is a 16 bit register. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8611. |
The size of cache memory in most microcomputers is about |
| A. | a few bytes |
| B. | a few kilobytes |
| C. | a few megabytes |
| D. | a few gigabytes |
| Answer» C. a few megabytes | |
| 8612. |
In which computer language is 'break' statement used |
| A. | Fortran 77 |
| B. | Pascal |
| C. | C |
| D. | none of the above |
| Answer» D. none of the above | |
| 8613. |
Computer virus can hide itself in a diskette but not in a hard disk. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8614. |
The interface chip for 8086 and 16 bit ADC is |
| A. | 8259 |
| B. | 8255 |
| C. | 8253 |
| D. | 8251 |
| Answer» C. 8253 | |
| 8615. |
Which of the following computer memories is fastest? |
| A. | Cache |
| B. | Primary |
| C. | Mass storage |
| D. | Off line back up |
| Answer» B. Primary | |
| 8616. |
Match the following: List I List II A.Zener diode1.used in seven segment displayB.Tunnel diode2.used in voltage regulator circuitsC.LED3.used is solar energy utilizationD.Photovoltaic cell4.used in digital circuits |
| A. | A-1, B-3, C-2, D-4 |
| B. | A-2, B-3, C-1, D-4 |
| C. | A-2, B-4, C-1, D-3 |
| D. | A-3, B-2, C-4, D-1 |
| Answer» D. A-3, B-2, C-4, D-1 | |
| 8617. |
Match the following: List I List II A.VOH(min)1.2.4 VB.VIH(min)2.1.5 VC.VOL(max)3.0.4 V 4.2.0 V 5.0.8 V |
| A. | A-1, B-3, C-4 |
| B. | A-1, B-4, C-3 |
| C. | A-5, B-4, C-3 |
| D. | A-1, B-5, C-2 |
| Answer» C. A-5, B-4, C-3 | |
| 8618. |
Match the following: List I List II A.shift Register1.Frequency divisionB.Counter2.Addressing in memory chipsC.Decoder3.Serial to parallel Data conversion |
| A. | A-3, B-2, C-1 |
| B. | A-3, B-1, C-2 |
| C. | A-2, B-1, C-3 |
| D. | A-1, B-2, C-2 |
| Answer» C. A-2, B-1, C-3 | |
| 8619. |
Match the following: List I (Instrument) List II (Parameters) A.Moving coil galvanometer1.High inertia, soft spring controlB.Ballistic galvanometer2.No control, high dampingC.Vibration galvanometer3.Soft spring control, critical dampingD.Moving coil flux meter4.Low inertia, tuned spring control |
| A. | A-4, B-2, C-3, D-1 |
| B. | A-1, B-3, C-2, D-4 |
| C. | A-2, B-1, C-4, D-3 |
| D. | A-3, B-1, C-4, D-2 |
| Answer» E. | |
| 8620. |
Match the following: List I (Operator) List II (Description) A.& &1.AssignmentB.| |2.Logical ANDC.=3.Logical OR |
| A. | A-1, B-2, C-3 |
| B. | A-2, B-3, C-1 |
| C. | A-3, B-2, C-1 |
| D. | A-1, B-3, C-2 |
| Answer» C. A-3, B-2, C-1 | |
| 8621. |
Z flag is reset if an ALU operation results in 0. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8622. |
Match the following: List I List II A.n Channel JFET1.B.p Channel JFET2.C.Depletion MOSFET3.D.Enhancement MOSFET4. |
| A. | A-4, B-3, C-2, D-1 |
| B. | A-1, B-3, C-4, D-2 |
| C. | A-3, B-4, C-1, D-2 |
| D. | A-2, B-4, C-3, D-1 |
| Answer» D. A-2, B-4, C-3, D-1 | |
| 8623. |
Match the following: List I List II A.Reactance theorem1.FosterB.Driving point impedance2.BartlettC.Continued fraction expansion3.CauerD.Bisection Theorem4.Positive real function |
| A. | A-1, B-4, C-3, D-2 |
| B. | A-1, B-2, C-3, D-4 |
| C. | A-2, B-3, C-1, D-4 |
| D. | A-3, B-4, C-2, D-1 |
| Answer» B. A-1, B-2, C-3, D-4 | |
| 8624. |
Match the following: List I List II A.Ring modulator1.Clock recoveryB.VCO2.Demodulation of FMC.Foster Seeley discriminator3.Frequency conversionD.Mixer4.Summing of two points 5.Generation of FM 6.Generation of DSB-SC |
| A. | A-1, B-3, C-2, D-4 |
| B. | A-6, B-5, C-2, D-3 |
| C. | A-6, B-1, C-3, D-2 |
| D. | A-5, B-6, C-1, D-3 |
| Answer» C. A-6, B-1, C-3, D-2 | |
| 8625. |
Match the following: List I List II A.Zener diode1.B.Tunnel diode2.C.Schottky diode3.D.Diode4. |
| A. | A-1, B-3, C-2, D-4 |
| B. | A-2, B-3, C-1, D-4 |
| C. | A-4, B-3, C-2, D-1 |
| D. | A-3, B-2, C-4, D-1 |
| Answer» E. | |
| 8626. |
Match the following: List I List II A.Serial Binary adder1.(2n - 1)tpdB.Ripple carry adder2.(n - 1)tpdC.Carry look ahead binary adder3.Operation time independent of size 4.6tpd for 4 bit carry look ahead adder |
| A. | A-2, B-1, C-3 |
| B. | A-2, B-1, C-4 |
| C. | A-1, B-2, C-4 |
| D. | A-1, B-2, C-3 |
| Answer» B. A-2, B-1, C-4 | |
| 8627. |
Match the following: List I (Logic family) List II (Characteristic of logic family) A.TTL1.Maximum power ConsumptionB.ECL2.Highest Packing DensityC.NMOS3.Least Power ConsumptionD.CMOS4.Saturated Logic |
| A. | A-1, B-4, C-2, D-3 |
| B. | A-1, B-4, C-3, D-2 |
| C. | A-4, B-1, C-2, D-3 |
| D. | A-4, B-1, C-3, D-2 |
| Answer» D. A-4, B-1, C-3, D-2 | |
| 8628. |
Match the following: List I List II A.Penetration frequency1.Lowest frequency at which charged particles spiral in fixed magnetic fieldB.Optimum working frequency2.Same as critical and frequencyC.Gyro frequency3.Highest frequency of radio waves that can be usedD.Maximum usable frequency4.The most effective frequency for ionosphere propagation of radio waves |
| A. | A-2, B-4, C-1, D-3 |
| B. | A-4, B-1, C-3, D-2 |
| C. | A-1, B-3, C-2, D-4 |
| Answer» B. A-4, B-1, C-3, D-2 | |
| 8629. |
Frequency range for satellite communication is |
| A. | 1 kHz to 100 kHz |
| B. | 100 kHz to 10 MHz |
| C. | 10 MHz to 100 MHz |
| D. | 1 GHz to 30 GHz |
| Answer» E. | |
| 8630. |
Match the following: List I (Comm.services) List II (Bandwidth) A.AM broadcast1.10 kHzB.Telephone2.4 kHzC.wide-band FM3.200 kHzD.TV4.7 MHz |
| A. | A-1, B-2, C-3, D-4 |
| B. | A-3, B-4, C-1, D-2 |
| C. | A-1, B-4, C-3, D-2 |
| D. | A-3, B-2, C-1, D-4 |
| Answer» B. A-3, B-4, C-1, D-2 | |
| 8631. |
For a given operating frequency a waveguide has more power handling capacity than a coaxial line. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8632. |
VSWR = Emax/Emin. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8633. |
Match the following: List I List II A.DMA controller1.Interface between computer and video display adapterB.CKT controller2.Used to read data directly from disk into directly memoryC.Interrupt controller3.Supervises the operation of control signal |
| A. | A-1, B-2, C-3 |
| B. | A-2, B-3, C-1 |
| C. | A-3, B-2, C-1 |
| D. | A-2, B-1, C-3 |
| Answer» E. | |
| 8634. |
Power monitor and reflectometer use the principle of |
| A. | directional coupler |
| B. | klystron amplifier |
| C. | Gunn diode |
| D. | TWT |
| Answer» B. klystron amplifier | |
| 8635. |
A line slightly longer than length and short circuited at far end behaves as |
| A. | an inductance |
| B. | a capacitance |
| C. | L and C in series |
| D. | L and C in parallel |
| Answer» C. L and C in series | |
| 8636. |
In a rectangular waveguide cutoff wavelength for TE10 mode is 8 cm. Then cutoff wavelength for TE20 mode is |
| A. | 8 cm |
| B. | 6 cm |
| C. | 4 cm |
| D. | 2 cm |
| Answer» D. 2 cm | |
| 8637. |
In a coaxial line |
| A. | the characteristic impedance is less than that of two wire line |
| B. | the wave velocity is less than that of two wire line |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 8638. |
In rectangular waveguides the ratio of width to height is about |
| A. | 0.5 |
| B. | 1 |
| C. | 2 |
| D. | 4 |
| Answer» D. 4 | |
| 8639. |
If wavelength in free space is 0 wavelength in insulator , r is relative permittivity or insulator and r is relative permittivity or insulator, then |
| A. | <img src="/_files/images/electronics-and-communication-engineering/microwave-communication/11-72-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/microwave-communication/11-72-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/microwave-communication/11-72-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/microwave-communication/11-72-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/microwave-communication/11-72-3.png"> | |
| 8640. |
In the given figure the circuits for input impedance of a microwave device with output ports match terminated. The device is |
| A. | E plane tee |
| B. | H plane tee |
| C. | magic tee |
| D. | hybrid ring |
| Answer» E. | |
| 8641. |
Which of these statements is correct? |
| A. | Ridge guide is essentially a form of capacitively loaded guide. |
| B. | Ridge guide is essentially a form of inductively loaded guide. |
| C. | Ridge guide is essentially a form of resistively loaded guide. |
| D. | Ridge guide has higher power handling capacity than rectangular waveguide. |
| Answer» B. Ridge guide is essentially a form of inductively loaded guide. | |
| 8642. |
A TEM wave is incident normally on a perfect conductor. The E and H fields at boundary will respectively be |
| A. | minimum and maximum |
| B. | minimum and minimum |
| C. | maximum and minimum |
| D. | maximum and maximum |
| Answer» B. minimum and minimum | |
| 8643. |
The scattering matrix of magic tee is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/microwave-communication/15-159-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/microwave-communication/15-159-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/microwave-communication/15-159-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/microwave-communication/15-159-4.png"> |
| Answer» B. <img src="/_files/images/electronics-and-communication-engineering/microwave-communication/15-159-2.png"> | |
| 8644. |
The power requirements of a DRAM in active and stand by modes is about |
| A. | 350 mW and 5 mW respectively |
| B. | 350 mW each |
| C. | 5 mW each |
| D. | 350 mW and 100 mW respectively |
| Answer» B. 350 mW each | |
| 8645. |
Match the following: List I List II A.Output of signal generator1.ModulatedB.Error signal from a synchro2.DigitalC.Output of a JK flip flop3.AnalogD.Signal received by radar4.Stoichastic |
| A. | A-1, B-3, C-2, D-4 |
| B. | A-3, B-1, C-2, D-4 |
| C. | A-3, B-1, C-4, D-2 |
| D. | A-1, B-3, C-4, D-2 |
| Answer» C. A-3, B-1, C-4, D-2 | |
| 8646. |
Match the following: List I (Types of transmission structure) List II (Modes of propagation)A.Strip line1.Quasi TEMB.Hollow rectangular waveguide2.Pure TEMC.Microstrip3.TE/TMD.Corrugated waveguide4.Hybrid |
| A. | A-2, B-1, C-3, D-4 |
| B. | A-4, B-1, C-3, D-2 |
| C. | A-2, B-3, C-1, D-4 |
| D. | A-4, B-3, C-1, D-2 |
| Answer» D. A-4, B-3, C-1, D-2 | |
| 8647. |
Match the following: List I ( P) List II (Number of bits in register) A.80851.32 bitB.80862.16 bitC.680003.8/16 bit |
| A. | A-1, B-2, C-3 |
| B. | A-2, B-3, C-1 |
| C. | A-3, B-2, C-1 |
| D. | A-3, B-1, C-2 |
| Answer» D. A-3, B-1, C-2 | |
| 8648. |
Match the following: List I (DOS commands) List II (Meaning) A.DBLSPACE1.Deletes a director and its sub-directoriesB.MEM2.Displays the amount of used and free memoryC.SYS3.Put a copy of DOS on diskD.DELTREE4.Compresses files to increase the storage capacity of disc |
| A. | A-4, B-3, C-2, D-1 |
| B. | A-2, B-3, C-4, D-1 |
| C. | A-4, B-2, C-3, D-1 |
| D. | A-1, B-2, C-3, D-4 |
| Answer» D. A-1, B-2, C-3, D-4 | |
| 8649. |
Microwaves are used for |
| A. | telephony |
| B. | radio broadcast |
| C. | TV systems |
| D. | all of the above |
| Answer» E. | |
| 8650. |
In a shield helix |
| A. | the spacing between adjacent turns is very large |
| B. | the spacing between adjacent turns approaches zero |
| C. | the spacing between adjacent turns approaches zero and wire thickness approaches zero |
| D. | the spacing between adjacent turns is very large wire thickness approaches zero |
| Answer» D. the spacing between adjacent turns is very large wire thickness approaches zero | |