MCQOPTIONS
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MCQOPTIONS
This section includes 2171 Mcqs, each offering curated multiple-choice questions to sharpen your ENGINEERING SERVICES EXAMINATION (ESE) knowledge and support exam preparation. Choose a topic below to get started.
| 1001. |
268₁₀ = __________ . |
| A. | 10A₁₆ |
| B. | 10B₁₆ |
| C. | 10C₁₆ |
| D. | 10D₁₆ |
| Answer» D. 10D₁₆ | |
| 1002. |
In a ring counter for N clock pulses the scale for the counter is |
| A. | N : 1 |
| B. | N : 2 |
| C. | N : 10 |
| D. | N : 100 |
| Answer» B. N : 2 | |
| 1003. |
A clock pulse is fed into 3 bit binary down count. The signal at B output is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 1004. |
In the circuit shown below, the outputs Y1 and Y2 for the given initial condition Y1 = Y2 = 1 and after four input pulses will be |
| A. | Y1 = 1, Y2 = 0 |
| B. | Y1 = 0, Y2 = 0 |
| C. | Y1 = 0, Y2 = 1 |
| D. | Y1 = 1, Y2 = 1 |
| Answer» E. | |
| 1005. |
In a 4 bit counter the output of 3 JK FFs from MSB downward are connected to the NAND gate whose O/P is connected to CLR |
| A. | it is a MOD-14 counter |
| B. | it is MOD-13 counter |
| C. | it is divided by 13 counter |
| D. | it is divide by 10 counter |
| Answer» B. it is MOD-13 counter | |
| 1006. |
In a three variable K map four adjacent cells give |
| A. | single variable term |
| B. | two variable term |
| C. | three variable term |
| D. | either (a) or (b) |
| Answer» B. two variable term | |
| 1007. |
What is the result for following expression (map method)? |
| A. | A + D + B̅C |
| B. | A + D |
| C. | A̅ D + B̅ C |
| D. | A + D̅ + B̅C |
| Answer» C. A̅ D + B̅ C | |
| 1008. |
What is the memory word size of 8085 μp? |
| A. | 6 bits |
| B. | 8 bits |
| C. | 12 bits |
| D. | 16 bits |
| Answer» C. 12 bits | |
| 1009. |
Symmetrical square wave of time period 100 μs can be obtained from square wave of time period 10 μs by using |
| A. | divide by 5 circuit |
| B. | divide by 2 circuit |
| C. | divide by 5 circuit followed by divide by 2 circuit |
| D. | BCD counter |
| Answer» D. BCD counter | |
| 1010. |
If the switch is thrown to the START position, Q and Y will be equal to |
| A. | Q = 0, Y = 0 |
| B. | Q= 1, Y= 1 |
| C. | Q = 1, Y = CLK |
| D. | Q = 0, Y = CLK |
| Answer» D. Q = 0, Y = CLK | |
| 1011. |
Status register in the 8156 is read with |
| A. | IN 20 H |
| B. | OUT 20 H |
| C. | either (a) or (b) |
| D. | none of the above |
| Answer» B. OUT 20 H | |
| 1012. |
In RAM, all the information can be obtained at the output with |
| A. | minimum time delay |
| B. | unequal time delay |
| C. | nearly identical time delay |
| D. | maximum time delay |
| Answer» D. maximum time delay | |
| 1013. |
Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after SBI 0B7H? |
| A. | 12 H, 0 |
| B. | 12 H, 1 |
| C. | DDH, 0 |
| D. | DDH, 1 |
| Answer» E. | |
| 1014. |
The amplifier used in miller voltage sweep should have a gain of |
| A. | -∞ |
| B. | +1 |
| C. | +∞ |
| D. | -1 |
| Answer» B. +1 | |
| 1015. |
The value of program counter of 6800 at power on are after reset is |
| A. | 000 |
| B. | FFFE |
| C. | User Programmable |
| D. | FFFF |
| Answer» C. User Programmable | |
| 1016. |
If a microcomputer has a 64 K memory; what is the hexadecimal notations for the first memory location? |
| A. | AAAA |
| B. | FFFF |
| C. | AAA0 |
| D. | 0000 |
| Answer» E. | |
| 1017. |
Read the following statements 1. The circuitry of ripple counter is more complex than that of synchronous counter.2. The maximum frequency of operation of ripple counter depends on the modulus of the counter.3. The maximum frequency of operation of synchronous counter does not depend on the modulus of the counter. Which of the above statements are correct? |
| A. | 1 only |
| B. | 1, 2 |
| C. | 1, 2, 3 |
| D. | 2, 3 |
| Answer» E. | |
| 1018. |
An encoder converts decimal numbers to binary and other codes. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 1019. |
Assuming accumulator contain A 64 and the carry is set (1).What will register A and (CY) contain after RAR? |
| A. | 4 DH, 0 |
| B. | D 3H, 0 |
| C. | 4 DH, 1 |
| D. | 53 H, 0 |
| Answer» C. 4 DH, 1 | |
| 1020. |
The logic operations of the two circuits given below are |
| A. | complementary |
| B. | identical |
| C. | entirely different |
| D. | none of these |
| Answer» D. none of these | |
| 1021. |
In a four variable Karnaugh map, eight adjacent cells give a |
| A. | two variable term |
| B. | single variable term |
| C. | three variable term |
| D. | four variable term |
| Answer» C. three variable term | |
| 1022. |
Two 2's complement number having sign bits X and Y are added and the sign bit of the result is Z. then, the occurrence of overflow is indicated by the Boolean function. |
| A. | XYZ |
| B. | X̅ Y̅ Z̅ |
| C. | X̅ Y̅Z + XY Z̅ |
| D. | XY + YZ + ZX |
| Answer» E. | |
| 1023. |
The accuracy of A/D conversion is generally |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 1024. |
A three state switch has three outputs. These are |
| A. | low, low and high |
| B. | low, high, high |
| C. | low. floating, low |
| D. | low, high, floating |
| Answer» E. | |
| 1025. |
In 8085 microprocessor, how many lines are there in data bus? |
| A. | 6 |
| B. | 8 |
| C. | 2 |
| D. | 16 |
| Answer» C. 2 | |
| 1026. |
In level clocking the output can change |
| A. | on rising edge of clock cycle |
| B. | on falling edge of clock cycle |
| C. | during entire half cycle of the clock |
| D. | none of the above |
| Answer» D. none of the above | |
| 1027. |
The microprograms provided by a manufacturer to be used on his microprogrammed computer are generally called |
| A. | software |
| B. | network |
| C. | firmware |
| D. | hardware |
| Answer» D. hardware | |
| 1028. |
By placing an inverter between both inputs of an S-R flip-flop, the resulting flip-flop becomes |
| A. | J-K flip-flop |
| B. | D-flip-flop |
| C. | T-flip-flop |
| D. | Master salve JK flip-flop |
| Answer» C. T-flip-flop | |
| 1029. |
In case of static storage elements |
| A. | information is permanently stored |
| B. | information is to be periodically refreshed |
| C. | information is to be intermittently refreshed |
| D. | information is lost in case power is removed |
| Answer» E. | |
| 1030. |
The minimum number of NAND gates required to implement the Boolean function A +AB̅ + AB̅C is equal to |
| A. | 0 |
| B. | 1 |
| C. | 4 |
| D. | 7 |
| Answer» B. 1 | |
| 1031. |
Direct-memory-access channel facilitates data to move into and out of the system. |
| A. | without subroutine |
| B. | with equal time delay |
| C. | without programme intervention |
| D. | on first come first serve basis |
| Answer» D. on first come first serve basis | |
| 1032. |
As compared to TTL, CMOS logic has |
| A. | higher speed of operation |
| B. | higher power dissipation |
| C. | smaller physical size |
| D. | all of the above |
| Answer» D. all of the above | |
| 1033. |
The number of flip-flops needed to divide the input frequency by 32 is |
| A. | 2 |
| B. | 4 |
| C. | 5 |
| D. | 16 |
| Answer» D. 16 | |
| 1034. |
The noise margin of a TTL gate is about |
| A. | 0.2 V |
| B. | 0.4 V |
| C. | 0.6 V |
| D. | 0.8 V |
| Answer» C. 0.6 V | |
| 1035. |
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 | |
| 1036. |
In a one pole active low pass filter, the cut off frequency is fc. Then |
| A. | gain decreases at the rate of 20 dB per decade increase in frequency above fc |
| B. | gain decreases at the rate of 20 dB per decade decrease in frequency below fc |
| C. | gain decreases at the rate of 40 dB per decade increase in frequency above fc |
| D. | gain decreases at the rate 40 dB per decade decrease in frequency below fc |
| Answer» B. gain decreases at the rate of 20 dB per decade decrease in frequency below fc | |
| 1037. |
Consider the following rectifier circuits : 1. half-wave rectifier without filter2. full-wave rectifier without filter3. full-wave rectifier with series inductance filter4. full-wave rectifier with capacitance filter. The sequence of these rectifier circuits in decreasing order of their ripple factor is |
| A. | 1, 2, 3, 4 |
| B. | 3, 4, 1, 2 |
| C. | 1, 4, 3, 2 |
| D. | 3, 2, 1, 4 |
| Answer» B. 3, 4, 1, 2 | |
| 1038. |
For high frequency response of a transistor amplifier, suitable model to use is |
| A. | Kelvin network |
| B. | Lattice network |
| C. | Hybrid π |
| D. | T-network |
| Answer» D. T-network | |
| 1039. |
A dc amplifier can operate |
| A. | at zero frequency |
| B. | only at low frequency |
| C. | only at high frequencies |
| D. | both at low and high frequencies |
| Answer» B. only at low frequency | |
| 1040. |
A radio frequency choke permits an easy flow of __________ current and at the same time it offers a very impedance to __________ currents. |
| A. | A.C., low frequency |
| B. | A.C., high frequency |
| C. | D.C., low frequency |
| D. | D.C. high frequency |
| Answer» E. | |
| 1041. |
For a transistor if αdc = 0.98 and emitter current IE is 2 mA, then collector current will be |
| A. | 0.44 mA |
| B. | 0.88 mA |
| C. | 1.96 mA |
| D. | 3.32 mA |
| Answer» C. 1.96 mA | |
| 1042. |
A limiter circuit can be built using a diode and resistance. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | can't say |
| Answer» B. False | |
| 1043. |
The properties of FETs closely resemble those of a |
| A. | thermionic valve |
| B. | P-N-P transistor |
| C. | N-P-N transistor |
| D. | UJT |
| Answer» B. P-N-P transistor | |
| 1044. |
At high frequencies the output circuit of transistor amplifier reduces to |
| A. | a lead network |
| B. | a lag network |
| C. | either (a) or (b) |
| D. | neither (a) nor (b) |
| Answer» C. either (a) or (b) | |
| 1045. |
Lower chip area requirements of MOS is advantage in |
| A. | low power circuits |
| B. | high power circuits |
| C. | repetitive operation circuits |
| D. | large scale integration |
| Answer» E. | |
| 1046. |
Assertion (A): Class A and Class B amplifier predominate in audio applications.Reason (R): Class C amplifier is used at radio frequencies. |
| A. | Both A and R are correct and R is correct explanation for A |
| B. | Both A and R are correct but R is not correct explanation for A |
| C. | A is correct R is wrong |
| D. | A is wrong R is correct |
| Answer» C. A is correct R is wrong | |
| 1047. |
For the high-pass circuit to act as a differentiator, the time constant must be |
| A. | small |
| B. | very small in comparison to the time period of the input signal |
| C. | very high in comparison to the time period of the input signal (that is low pass circuit) |
| D. | moderate value |
| Answer» C. very high in comparison to the time period of the input signal (that is low pass circuit) | |
| 1048. |
For the circuit shown in figure low cut-off frequency is |
| A. | 1.59 Hz |
| B. | 159 Hz |
| C. | 1.59 kHz |
| D. | 1.59 MHz |
| Answer» B. 159 Hz | |
| 1049. |
A Ge diode operated at a junction temperature of 27°C. For a forward current of 10 mA, VD is found to be 0.3 V. If VD = 0.4 V then forward current will be |
| A. | 400 mA |
| B. | 475 mA |
| C. | 477 mA |
| D. | 480 mA |
| Answer» D. 480 mA | |
| 1050. |
In a series regulated power supply circuit, the voltage gain Av, of the 'pass' transistor satisfies the condition |
| A. | Av → ∞ |
| B. | 1 << Av < ∞ |
| C. | Av ≈ 1 |
| D. | Av << 1 |
| Answer» D. Av << 1 | |