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.
| 1101. |
Which of the following operations will give the result 2 in C? |
| A. | 5 / 2 |
| B. | 4.0 / 2 |
| C. | 4.0 / 2.0 |
| D. | 4 / 2.0 |
| Answer» B. 4.0 / 2 | |
| 1102. |
Diskette can be used for primary storage as well as secondary storage in a computer. |
| A. | True |
| B. | False |
| Answer» C. | |
| 1103. |
Read the following statements Magnetic tape is a sequential device.Magnetic disc is a direct access device.Magnetic tape and disc are both sequential devices.Magnetic tape and disc are both direct access devices. Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 4 only |
| D. | 1, 2 and 3 only |
| Answer» B. 1 and 3 only | |
| 1104. |
Let JCOKE = 3 and LPEPSI = 5. Consider the statement IF (3 * JCOKE. EQ. LPESPSI)JCOKE = JCOKE + 2 JCOKE = JCOKE + 5 What will be the final value of JCOKE after the above statement is executed? |
| A. | 8 |
| B. | 1 |
| C. | 15 |
| D. | 10 |
| Answer» B. 1 | |
| 1105. |
A memory chip has 65536 cells in it. Then |
| A. | time required to access cell is same as that to access cell 65536 |
| B. | time required to access cell is less than that required to access cell 65536 |
| C. | time required to access cell is more than that required to access cell 65536 |
| D. | either (a) or (b) |
| Answer» B. time required to access cell is less than that required to access cell 65536 | |
| 1106. |
A computer program is used to read N and compute N !. IF N = 6, the result will be |
| A. | 6 |
| B. | 12 |
| C. | 720 |
| D. | 1040 |
| Answer» D. 1040 | |
| 1107. |
The port of PC to which mouse is connected is called |
| A. | serial port |
| B. | parallel port |
| C. | input port |
| D. | scanner port |
| Answer» B. parallel port | |
| 1108. |
Consider the following statement in Basic 15 INPUT X, Y, Z20 IF Y > X THEN 2521 IF Z > Y THEN 3025 PRINT Y30 PRINT Z, X35 END IF X, Y, Z are 150, 200, 250 then the output will be |
| A. | 200, 250, 150 respectively |
| B. | 150, 200, 250 respectively |
| C. | 250, 200, 150 respectively |
| D. | 200, 150, 250 respectively |
| Answer» B. 150, 200, 250 respectively | |
| 1109. |
FORTRAN expression for 3b2-5a2 is |
| A. | SQRT (3 * B ** 2 - 5 * A ** 2) |
| B. | SQRT 3 * B ** 2 - 5 * A ** 2 |
| C. | SQRT (3 * b ** 2 - 5 * a ** 2) |
| D. | SQRT (3 * B ** 2) - SQRT (5 * A **2) |
| Answer» B. SQRT 3 * B ** 2 - 5 * A ** 2 | |
| 1110. |
IC 74181 is a 4 bit device. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1111. |
Assertion (A): Microprocessor 8085 has an 8 bit register called accumulator which stores intermediate answers during a computer operation.Reason (R): Accumulator can send or receive data. |
| 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» C. A is correct R is wrong | |
| 1112. |
Assertion (A): Interfacing means synchronisation of digital information transmission between input output devices and computer.Reason (R): A computer with higher bit word size executes programs at a faster rate. |
| 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» C. A is correct R is wrong | |
| 1113. |
Which of the following instructions in 8085 does not belong to data transfer group? |
| A. | <code>L X I <i>rp</i>, data 16</code> |
| B. | <code>MOV M, <i>r</i></code> |
| C. | <code>MVIM, data</code> |
| D. | <code>ADC M</code> |
| Answer» E. | |
| 1114. |
Both ROM and RAM can be accessed randomly. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1115. |
Windows have a user friendly program called 'Front Page Express' for creating web pages. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1116. |
The number of pins in microprocessor 8086 is |
| A. | 30 |
| B. | 40 |
| C. | 50 |
| D. | 60 |
| Answer» C. 50 | |
| 1117. |
The input to ALU are the contents of accumulator and temporary register. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1118. |
Each cell of static RAM contains |
| A. | 4 MOS transistors |
| B. | 4 MOS transistors and 1 capacitor |
| C. | 2 MOS transistors |
| D. | 4 MOS transistors and 2 capacitors |
| Answer» B. 4 MOS transistors and 1 capacitor | |
| 1119. |
Which group of instructions is used to change sequence of operations in a computer program? |
| A. | Data transfer group |
| B. | Branch group |
| C. | Arithmetic group |
| D. | Logic group |
| Answer» C. Arithmetic group | |
| 1120. |
Read the following statements about Java It is well suited to design software which works in conjunction with internet.It is cross platform language.Java is close to programming language C, C ++ etc.It is an object oriented. Which of the above are correct? |
| A. | All |
| B. | 1, 2 and 3 only |
| C. | 1, 2 and 4 only |
| D. | 2, 3, 4 only |
| Answer» B. 1, 2 and 3 only | |
| 1121. |
The expression A2 + B2 - 3 AB when written is Pascal should be written as |
| A. | <code>A * A + B * B - 3 A * B</code> |
| B. | <code>A * A + B * B - 3.0 A * B </code> |
| C. | <code>A * A + B * B - 3.0 * A * B</code> |
| D. | <code>A * A + B * A - 3 * A * B </code> |
| Answer» D. <code>A * A + B * A - 3 * A * B </code> | |
| 1122. |
Read the following statements about Excel It supports many arithmetic functions like SUM, ABS, EXP, INT, MOD etc.It supports many trigonometric functions.It supports IRR function to calculate interest rate.It supports PV function to calculate the present value of future receipts. Which of the above are correct? |
| A. | All |
| B. | 1, 2 and 3 only |
| C. | 1, and 2 only |
| D. | 1 only |
| Answer» B. 1, 2 and 3 only | |
| 1123. |
If PRIN = 200.0 and BINT = 0.0525 the result of expression INCOME = PRIN * (1 + BINT) will be |
| A. | 210 |
| B. | 210.5 |
| C. | 210.5000 |
| D. | 210.50 |
| Answer» B. 210.5 | |
| 1124. |
Parabolic and lens antenna used at |
| A. | microwave frequency |
| B. | medium frequency |
| C. | low frequency |
| D. | high frequency |
| Answer» B. medium frequency | |
| 1125. |
Which of the following statement regarding waveguides is incorrect? |
| A. | At waveguide can be coupled to a coaxial cable |
| B. | At frequencies below the cut off value the wave progresses across the waveguide after total reflections |
| C. | Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves |
| D. | Waveguides can handle large power at UHF and microwaves |
| Answer» B. At frequencies below the cut off value the wave progresses across the waveguide after total reflections | |
| 1126. |
The potential that appears at a point in space due to the current which caused it is called potential |
| A. | accelerating |
| B. | retardation |
| C. | oscillating |
| D. | lagging the current |
| Answer» C. oscillating | |
| 1127. |
It is desired to reduce the reflection at an air porcelain by use of 7/4 plate (for Porcelain = 40, and r = 7). The thickness of the polystyrene plate required at 10 GHz will be |
| A. | 5.039 cm |
| B. | 50.39 cm |
| C. | 0.5039 cm |
| D. | 0.05039 cm |
| Answer» D. 0.05039 cm | |
| 1128. |
The useful magnetic flux obtainable from any closed surface is |
| A. | unity |
| B. | constant |
| C. | both (a) and (b) |
| D. | none of the above |
| Answer» E. | |
| 1129. |
The voltage and current distributions on a grounded /4 dipole (Marconi antenna) are similar to those of a half wave dipole in space. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1130. |
The equation . J = 0 is called |
| A. | Poisson's equation |
| B. | Kirchoff's node equation |
| C. | Continuity equation for static currents |
| D. | Continuity equation for sampling currents |
| Answer» D. Continuity equation for sampling currents | |
| 1131. |
Which of the following impedance inversion is obtained? |
| A. | Short-circuited stub |
| B. | A quarter wave line |
| C. | Balun transformer |
| D. | A half wave line |
| Answer» C. Balun transformer | |
| 1132. |
In case of surface waves the field strength at a point is directly proportional to |
| A. | antenna height |
| B. | wave frequency |
| C. | current of the antenna |
| D. | distance of the point from the antenna |
| Answer» E. | |
| 1133. |
The radiation pattern of a parabola antenna is |
| A. | omnidirectional |
| B. | a figure of directional |
| C. | highly directional |
| D. | none of the above |
| Answer» D. none of the above | |
| 1134. |
In microwave communication links, when fading due to rain attenuation occurs then technique adopted for solving the problem would include |
| A. | antenna replacement and feed correction |
| B. | amplitude timing and phase correction |
| C. | polarization shifting and code diversity |
| D. | path diversity and frequency diversity |
| Answer» E. | |
| 1135. |
The Q of a resonant transmission line is |
| A. | <img src="/_files/images/electronics-and-communication-engineering/electromagnetic-field-theory/207-494-1.png"> |
| B. | <img src="/_files/images/electronics-and-communication-engineering/electromagnetic-field-theory/207-494-2.png"> |
| C. | <img src="/_files/images/electronics-and-communication-engineering/electromagnetic-field-theory/207-494-3.png"> |
| D. | <img src="/_files/images/electronics-and-communication-engineering/electromagnetic-field-theory/207-494-4.png"> |
| Answer» C. <img src="/_files/images/electronics-and-communication-engineering/electromagnetic-field-theory/207-494-3.png"> | |
| 1136. |
The wave in wave guide has |
| A. | group velocity inversely proportional to wavelength |
| B. | larger frequency than in the free space |
| C. | diminishing wavelength than in the free space |
| D. | larger wavelength than in the free space |
| Answer» E. | |
| 1137. |
The power gain of a half-wave dipole with respect to an isotropic radiator is |
| A. | 2.15 db |
| B. | 3 db |
| C. | 4.15 db |
| D. | 6 db |
| Answer» B. 3 db | |
| 1138. |
In an impedance smith chart, a clockwise movement along a constant resistance circle gives rise to |
| A. | decrease in the value of reactance |
| B. | an increase in the value of reactance |
| C. | no change in the reactance value |
| D. | no change in the impedance value |
| Answer» C. no change in the reactance value | |
| 1139. |
A T.V. station works at 300 MHz and radiates 100 kW of power. This signal received at a distance of 200 km will be |
| A. | a few V/m due to attenuation by atmosphere |
| B. | 1-5 mV due to ionospheric reflection |
| C. | nil since propagation is line of sight |
| D. | nil because signal fades completely at 300 MHz |
| Answer» D. nil because signal fades completely at 300 MHz | |
| 1140. |
Which of the following can be accessed only sequentially? |
| A. | Floppy disk |
| B. | Hard disk |
| C. | Magnetic tape |
| D. | ROM |
| Answer» D. ROM | |
| 1141. |
When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ . |
| A. | reflection |
| B. | refraction |
| C. | transmission |
| D. | none of the above |
| Answer» C. transmission | |
| 1142. |
Radiation intensity in a given direction is the |
| A. | energy radiated per square metre |
| B. | power radiated per square metre |
| C. | power radiated per unit solid angle in that direction |
| D. | none of the above |
| Answer» D. none of the above | |
| 1143. |
Tropospheric scatter is used with frequencies in the |
| A. | HF |
| B. | VHF |
| C. | UHF |
| D. | VLF |
| Answer» D. VLF | |
| 1144. |
A Yagi antenna has a driven antenna |
| A. | only |
| B. | with a reflector |
| C. | with one or more directors |
| D. | with a reflector and one or more directors |
| Answer» E. | |
| 1145. |
An electric charge Q is placed in a dielectric medium which of the following quantities are independent of the dielectric constant of the medium |
| A. | electric potential V and electric field intensity E |
| B. | displacement density D and displacement |
| C. | electric field intensity E and displacement |
| D. | electric potential V and displacement |
| Answer» C. electric field intensity E and displacement | |
| 1146. |
The minimum height of outer atmosphere is |
| A. | 100 km |
| B. | 150 km |
| C. | 200 km |
| D. | 400 km |
| Answer» E. | |
| 1147. |
A square corner reflector is used in |
| A. | radio astronomy |
| B. | tv broadcast |
| C. | point to point communication |
| D. | all of the above |
| Answer» E. | |
| 1148. |
A TEM wave incident obliquely on a dielectric boundary with r1 = 2 and r2 = 1, the angle of incidence for total reflection is |
| A. | 30 |
| B. | 60 |
| C. | 45 |
| D. | 90 |
| Answer» D. 90 | |
| 1149. |
Zoning is used with a dielectric antenna in order to |
| A. | permit pin-point focusing |
| B. | reduce the bulk of the lens |
| C. | increase the bandwidth of the lens |
| D. | correct the curvature of the wavefront from a horn that is too short |
| Answer» B. reduce the bulk of the lens | |
| 1150. |
For aeroplane and navigation frequency band is |
| A. | VLF |
| B. | UHF |
| C. | VHF |
| D. | EHF |
| Answer» C. VHF | |