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.
| 951. |
To convert SR latch to D latch |
| A. | connect both S and R to D |
| B. | connect D to S directly and D to R through inverter |
| C. | connect D to R directly and D to S through inverter |
| D. | connect S to D and leave R open |
| Answer» C. connect D to R directly and D to S through inverter | |
| 952. |
D/A converters are generally |
| A. | weighted resistor network |
| B. | binary ladder network |
| C. | either (a) or (b) |
| D. | neither (a) nor (b) |
| Answer» C. either (a) or (b) | |
| 953. |
Assuming accumulator contain A 64 and the carry is set (1). What will accumulator (A) and carry (CY) contain after ANA A? |
| A. | A 6 H, 1 |
| B. | A 6 H, 0 |
| C. | 00 H, 0 |
| D. | 00 H, 1 |
| Answer» C. 00 H, 0 | |
| 954. |
A voltage DAC is generally slower than current DAC |
| A. | because of more accuracy |
| B. | because of higher resolution |
| C. | because of response time of op-amp current to voltage converter |
| D. | none of the above |
| Answer» D. none of the above | |
| 955. |
Available multiplexer IC package can have a maximum of 8 inputs. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 956. |
A counter displays a sequence of numbers. If a reading corresponds to the hexadecimal number F52E, the next two readings are respectively |
| A. | F52F, F520 |
| B. | F530, F531 |
| C. | F52F, F530 |
| D. | F52F, F52G |
| Answer» D. F52F, F52G | |
| 957. |
The digit F in hexadecimal system is equivalent to number __________ in decimal system. |
| A. | 16 |
| B. | 15 |
| C. | 17 |
| D. | 8 |
| Answer» C. 17 | |
| 958. |
Which device changes serial data to parallel data? |
| A. | Counter |
| B. | Multiplexer |
| C. | Demultiplexer |
| D. | Flip flop |
| Answer» D. Flip flop | |
| 959. |
A 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000). Then, what will be input, if the output register shows 100111 at the end of conversion. |
| A. | 5.85 V |
| B. | 6 V |
| C. | 5 V |
| D. | 10 V |
| Answer» B. 6 V | |
| 960. |
The number of accumulators in 6800 are |
| A. | 2 |
| B. | 3 |
| C. | 1 |
| D. | 4 |
| Answer» B. 3 | |
| 961. |
Out of SAM and RAM |
| A. | access time in both does not depend on address location |
| B. | in SAM access time depends on address location but not in RAM |
| C. | in RAM access time depends on address location but not in SAM |
| D. | in both the access time depends on storage location |
| Answer» C. in RAM access time depends on address location but not in SAM | |
| 962. |
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) | |
| 963. |
An 8 bit transistor register has output voltage of low-high-low-high-low-high-low-high. The decimal number stored is |
| A. | 105 |
| B. | 95 |
| C. | 85 |
| D. | 75 |
| Answer» D. 75 | |
| 964. |
A counter has a modulus of 10. The number of flip flops is |
| A. | 10 |
| B. | 5 |
| C. | 4 |
| D. | 3 |
| Answer» D. 3 | |
| 965. |
A digital system is required to amplify a binary encoded audio signal. The user should be able to control the gain of the amplifier from a minimum to a maximum in 100 increments. The minimum number of bits required to encode, in straight binary is, |
| A. | 8 |
| B. | 6 |
| C. | 5 |
| D. | 7 |
| Answer» E. | |
| 966. |
Which has the lowest propagation delay time? |
| A. | ECL |
| B. | TTL |
| C. | CMOS |
| D. | PMOS |
| Answer» B. TTL | |
| 967. |
A universal shift register can shift left or right. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 968. |
Which of the following is not a specification of D/A and A/D converters? |
| A. | Gain |
| B. | Drift |
| C. | Speed |
| D. | Accuracy |
| Answer» B. Drift | |
| 969. |
Computer virus is a piece of rough software of unknown origin that |
| A. | copies itself like a breeding germ |
| B. | spreads from one machine to another |
| C. | eats away processing power |
| D. | all of the above |
| Answer» E. | |
| 970. |
Using 2's complement, the largest positive and negative number which can be stored with 8 bits are |
| A. | +128 and -127 |
| B. | +128 and -128 |
| C. | +127 and -128 |
| D. | +127 and -127 |
| Answer» D. +127 and -127 | |
| 971. |
What will be FSV in 2 bit BCD D/A converter is a weighted resistor type with ER = 1V, R = 1 MΩ and Rf = 10KΩ |
| A. | 0.99 V |
| B. | 0.9 V |
| C. | 0.1 V |
| D. | 0 |
| Answer» B. 0.9 V | |
| 972. |
In a 4 bit ripple counter using flip flops with tpd = 40 ns, the maximum frequency can be |
| A. | 1.25 MHz |
| B. | 3.25 MHz |
| C. | 6.25 MHz |
| D. | 12.5 MHz |
| Answer» D. 12.5 MHz | |
| 973. |
An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if |
| A. | A = 1, B = 1, S = 1 |
| B. | A = 1, B = 1, S = 0 |
| C. | A = 1, B = 0, S = 1 |
| D. | A = 1, B = 0, S = 0 |
| Answer» C. A = 1, B = 0, S = 1 | |
| 974. |
Which of them contains an organic fluid? |
| A. | LED |
| B. | LCD |
| C. | Both LED and LCD |
| D. | Neither LED nor LCD |
| Answer» C. Both LED and LCD | |
| 975. |
In TTL the transistors are driven into and out of saturation. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 976. |
Which memory does not require programming equipment? |
| A. | RAM |
| B. | EPROM |
| C. | EEPROM |
| D. | UVPROM |
| Answer» B. EPROM | |
| 977. |
The number FF in hexadecimal system is equivalent to number __________ in decimal system. |
| A. | 256 |
| B. | 255 |
| C. | 240 |
| D. | 239 |
| Answer» C. 240 | |
| 978. |
110.11₂ x 110₂ = __________ ₁₀ |
| A. | 40.5 |
| B. | 30.5 |
| C. | 20.5 |
| D. | 10.5 |
| Answer» B. 30.5 | |
| 979. |
If number of information bits is 4, the parity bits in Hamming code are located at bit positions __________ from the LSB. |
| A. | 1, 2, 5 |
| B. | 1, 2, 4 |
| C. | 1, 2, 3 |
| D. | 1, 2 |
| Answer» C. 1, 2, 3 | |
| 980. |
Which are the pending interrupts? |
| A. | 5.5 |
| B. | 6.5 |
| C. | 7.5 |
| D. | None |
| Answer» D. None | |
| 981. |
For a 4096 x 8 EPROM, the number of address lines is |
| A. | 14 |
| B. | 12 |
| C. | 10 |
| D. | 8 |
| Answer» C. 10 | |
| 982. |
Figure shows an 8-bit LED display. A light circle means that a LED is ON (binary 1) and a dark circle means a LED is OFF (binary 0). What is the decimal equivalent of the binary number displayed? |
| A. | 100 |
| B. | 121 |
| C. | 144 |
| D. | 172 |
| Answer» E. | |
| 983. |
The logic circuit of the given figure realizes the function |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 984. |
The binary equivalent of 4096.90625 is |
| A. | 1000000000000.11101 |
| B. | 10000000000001.10101 |
| C. | 1000000000001.10001 |
| D. | 1000000000000.10011 |
| Answer» B. 10000000000001.10101 | |
| 985. |
For wired AND connection we should use |
| A. | TTL gates with active pull up |
| B. | TTL gates with open collector |
| C. | TTL gates without active pull up and with open collector |
| D. | any of the above |
| Answer» D. any of the above | |
| 986. |
For a depletion type NMOS, Vp = - 4 volts. For VGS = 0, 1D = 16 mA in the pinch off region of VDS. For VGS = - 2, the value of ID in the pinch off region of VDS is given by |
| A. | 64 mA |
| B. | 32 mA |
| C. | 16 mA |
| D. | 4 mA |
| Answer» E. | |
| 987. |
The logic performed by the high-noise immunity logic circuit shown below is |
| A. | OR |
| B. | AND |
| C. | NOR |
| D. | NAND |
| Answer» E. | |
| 988. |
(1001-10) is equal to |
| A. | 7 |
| B. | (8)₈ |
| C. | (7)₄ |
| D. | (8)₄ |
| Answer» B. (8)₈ | |
| 989. |
A(A̅ + B) = |
| A. | A |
| B. | A̅ B |
| C. | AB |
| D. | AB̅ |
| Answer» D. AB̅ | |
| 990. |
Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is |
| A. | TTL |
| B. | CMOS |
| C. | ECL |
| D. | TTLLS |
| Answer» D. TTLLS | |
| 991. |
In parallel in-parallel out shift register all bits are loaded and read simultaneously. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 992. |
A ripple counter has propagation delay. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 993. |
The total number of input words for 4 input OR gate is |
| A. | 20 |
| B. | 16 |
| C. | 12 |
| D. | 8 |
| Answer» C. 12 | |
| 994. |
Which memory requires periodic recharging? |
| A. | All ROMS |
| B. | All RAMS |
| C. | Static RAM |
| D. | Dynamic RAM |
| Answer» E. | |
| 995. |
A binary with a digits, all of which are unity has the value |
| A. | n² - 1 |
| B. | 2ⁿ |
| C. | 2ⁿ‾¹ |
| D. | 2ⁿ - 1 |
| Answer» E. | |
| 996. |
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. | |
| 997. |
Assume that only x and y logic inputs are available. What is the minimum number of 2-input NAND gates required to implement x Ꚛ y? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 998. |
In the assembler, which one of the following is required for variable name in symbol table? |
| A. | Addresses |
| B. | Values |
| C. | Registers |
| D. | Storage |
| Answer» D. Storage | |
| 999. |
How many interrupts are there in 8085 microprocessor? |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 1000. |
What will be conversion rate for a counter type A/D converter contains a 4 bit binary ladder and a counter driven by a 2 MHz clock. Then conversion time |
| A. | 125 |
| B. | 125 x 10³ |
| C. | 125 x 10⁶ |
| D. | None |
| Answer» C. 125 x 10⁶ | |