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.
| 551. |
A is even or B is true. Negation of above statement is |
| A. | A is odd or B is false |
| B. | A is odd and B is false |
| C. | A is even or B is false |
| D. | A is even and B is false |
| Answer» C. A is even or B is false | |
| 552. |
9's complement of 12₁₀ is |
| A. | 21₁₀ |
| B. | 87₁₀ |
| C. | 78₁₀ |
| D. | 76₁₀ |
| Answer» C. 78₁₀ | |
| 553. |
BCD equivalent of - 8₁₀ is |
| A. | 00110 |
| B. | 10110 |
| C. | 11000 |
| D. | 01000 |
| Answer» D. 01000 | |
| 554. |
A current tracer responds to |
| A. | steady current only |
| B. | pulsating current only |
| C. | both pulsating and steady current |
| D. | none of the above |
| Answer» C. both pulsating and steady current | |
| 555. |
Registers and counters are similar in the sense that they both |
| A. | count pulses |
| B. | store binary information |
| C. | are made from an array of flip-flops and gates integrated on a single chip |
| D. | are shift registers |
| Answer» D. are shift registers | |
| 556. |
Schmitt trigger is used for wave shaping. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 557. |
A binary adder has |
| A. | one half adder |
| B. | one half adder and 2 full adders |
| C. | two half adders |
| D. | one half adder and many full adders |
| Answer» E. | |
| 558. |
Which of the following binary numbers is equivalent to decimal 10? |
| A. | 1000 |
| B. | 1100 |
| C. | 1010 |
| D. | 1001 |
| Answer» D. 1001 | |
| 559. |
Consider the following statements: 1. In the 2's complement representation, negative numbers are stored in sign magnitude form.2. Taking 2's complement is equivalent to sign change.3. In a 4 bit complement representation of a binary number A.4. In the 2's complement representation the most significant bit (MSB) is zero for a positive number. Of these, the only true statements are |
| A. | (I) and (III) |
| B. | (I) and (IV) |
| C. | (II) and (III) |
| D. | (II) and (IV) |
| Answer» E. | |
| 560. |
The binary number 101100.110 in octal number will be |
| A. | 152.6 |
| B. | 154.6 |
| C. | 145.6 |
| D. | 174.6 |
| Answer» C. 145.6 | |
| 561. |
A master slave flip-flop has the characteristics that |
| A. | change in the I/P immediately reflected in the O/P |
| B. | change in the O/P occurs when the state of the master is affected |
| C. | change in the output occurs when the state of the slave is affected |
| D. | both the master and the slave states are affected at the same time |
| Answer» D. both the master and the slave states are affected at the same time | |
| 562. |
Semiconductor ROM's are sometimes preferred to semiconductor RAM's because |
| A. | ROM's are cheaper than RAMs |
| B. | ROMs are faster |
| C. | ROMs do not require power supply for their operations |
| D. | Programs stored in ROMs cannot be altered either by the power failure or by the user |
| Answer» E. | |
| 563. |
In a four variable K map eight adjacent cells give |
| A. | single variable term |
| B. | two variable term |
| C. | three variable term |
| D. | four variable term |
| Answer» B. two variable term | |
| 564. |
The content of which of the following determines the state of the CPU at the end of the execute cycle (when the interrupt is recognized)? 1. Program counter2. Processor register3. Certain status conditions Select the correct answer using the codes given below : |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 1 and 3 |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |
| 565. |
A 6 bit DAC uses binary weighted resistors. If MSB resistor is 20 k ohm, the value of LSB resistor is |
| A. | 20 k ohm |
| B. | 80 k ohm |
| C. | 320 k ohm |
| D. | 640 k ohm |
| Answer» E. | |
| 566. |
The multiplication time for 10-bit numbers with 1 MHz clock will be |
| A. | 32 μ sec |
| B. | 20 μ sec |
| C. | 21 μ sec |
| D. | 22 μ sec |
| Answer» E. | |
| 567. |
With four Boolean variables, how many Boolean expressions can be performed? |
| A. | 16 |
| B. | 256 |
| C. | 1024 (1 K) |
| D. | 64K (64 x 1024) |
| Answer» E. | |
| 568. |
In a flip-flop with RS latch a high S and a low R set the output to __________ and a low S and a high R set the output __________ . |
| A. | low, low |
| B. | high, high |
| C. | low, high |
| D. | high, low |
| Answer» D. high, low | |
| 569. |
For edge triggering in flip flops, manufacturers use |
| A. | RC circuit |
| B. | direct coupled design |
| C. | either RC circuit or direct coupled design |
| D. | none of the above |
| Answer» C. either RC circuit or direct coupled design | |
| 570. |
The hexadecimal number 64 AC is equivalent to decimal number |
| A. | 25727 |
| B. | 25722 |
| C. | 25772 |
| D. | 25777 |
| Answer» D. 25777 | |
| 571. |
The circuit shown below is functionally equivalent to |
| A. | NOR gate |
| B. | OR gate |
| C. | EX-OR gate |
| D. | NAND gate |
| Answer» D. NAND gate | |
| 572. |
In JK flip flop toggle state exists if |
| A. | J = 0, K = 1 |
| B. | J = 1, K = 0 |
| C. | J = 0, K = 0 |
| D. | J = 1, K = 1 |
| Answer» E. | |
| 573. |
Without any addition circuitry, an 8:1 MUX can be used to obtain. |
| A. | some but not all Boolean functions of 3 variables |
| B. | all functions of 3 variables but none of 4 variables |
| C. | all functions of 3 variables and some but not all of 4 variables |
| D. | all functions of 4 variables |
| Answer» C. all functions of 3 variables and some but not all of 4 variables | |
| 574. |
Which of the following parameters is not specified for digital ICs? |
| A. | Gate dissipation |
| B. | Propagation delay |
| C. | Noise margin |
| D. | Bandwidth |
| Answer» E. | |
| 575. |
A JK flip flop can be converted to D flip flop by |
| A. | Connecting both J and K terminals to D |
| B. | Connecting J terminal to D and leaving K open |
| C. | Connecting K terminal to D and leaving J open |
| D. | Connecting J terminal to D and K terminal to D through an inverter |
| Answer» E. | |
| 576. |
If memory chip size is 256 x 1 bits, the number of chips required to make 1 k byte memory is |
| A. | 8 |
| B. | 12 |
| C. | 24 |
| D. | 32 |
| Answer» E. | |
| 577. |
The circuit shown in figure converts |
| A. | BCD to binary code |
| B. | binary to excess-3 code |
| C. | excess-3 to Gray code |
| D. | gray to binary code |
| Answer» E. | |
| 578. |
BCD number 1100111 = __________ ₁₀ |
| A. | 66 |
| B. | 67 |
| C. | 68 |
| D. | 69 |
| Answer» C. 68 | |
| 579. |
The circuit shown in the figure is a |
| A. | positive logic OR circuit |
| B. | negative logic OR circuit |
| C. | positive logic AND circuit |
| D. | negative logic AND circuit |
| Answer» B. negative logic OR circuit | |
| 580. |
The converter whose conversion time is independent of number of bits is |
| A. | dual stope |
| B. | counter type |
| C. | parallel conversion |
| D. | successive approximation |
| Answer» D. successive approximation | |
| 581. |
Which of the following finds application in pocket calculators? |
| A. | TTL |
| B. | CMOS |
| C. | ECL |
| D. | Both (a) and (c) |
| Answer» C. ECL | |
| 582. |
The output of a half adder is |
| A. | SUM |
| B. | CARRY |
| C. | SUM and CARRY |
| D. | none of the above |
| Answer» D. none of the above | |
| 583. |
In C-language f- = 9 is equivalent to |
| A. | f = -9 |
| B. | f = f - 9 |
| C. | f = 9 - 1 |
| D. | -f = 9 |
| Answer» C. f = 9 - 1 | |
| 584. |
The contents of stack location after the call operation will be |
| A. | 00000111 |
| B. | 00001110 |
| C. | 00001010 |
| D. | 00001111 |
| Answer» B. 00001110 | |
| 585. |
10 in BCD code represent |
| A. | 10100 |
| B. | 1100 |
| C. | 010111 |
| D. | None of the above |
| Answer» E. | |
| 586. |
An 8156 has A₁₅ connected to its CE input. A₁₄ to A₈ are unconnected, and AD₇ to AC₀ are connected.Ignoring shadows, the port addresses |
| A. | 80 H |
| B. | 85 H |
| C. | 82 H, 83 H |
| D. | 80 H to 85 H |
| Answer» E. | |
| 587. |
In a positive edge triggered JK flip flop, J = 1, K = 0 and clock pulse is rising Q will |
| A. | be 0 |
| B. | be 1 |
| C. | show no change |
| D. | toggle |
| Answer» C. show no change | |
| 588. |
Out of SR and JK flip flops, which is susceptible to race condition? |
| A. | SR |
| B. | JK |
| C. | Both SR and JK |
| D. | None of the above |
| Answer» B. JK | |
| 589. |
A transistor is operated as non-saturated switch to eliminate |
| A. | turn on time |
| B. | turn off time |
| C. | storage time |
| D. | delay time |
| Answer» C. storage time | |
| 590. |
DeMorgan's second theorem is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 591. |
The fixed count that should be used so that the output register will represent the input for 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). |
| A. | 000110 |
| B. | 0010 |
| C. | 1111 |
| D. | 011101 |
| Answer» B. 0010 | |
| 592. |
The write cycle time of memory is 200 nsec. The maximum rate of data which can be stored is |
| A. | 200 words/sec |
| B. | 5 x 10³ words/sec |
| C. | 5 x 10⁶ word/sec |
| D. | 5 x 10⁹ words/sec |
| Answer» D. 5 x 10⁹ words/sec | |
| 593. |
The series 54 H/74 H denotes |
| A. | Standard TTL |
| B. | High speed TTL |
| C. | Low Power TTL |
| D. | High Power TTL |
| Answer» C. Low Power TTL | |
| 594. |
Assertion (A): In computers the data is stored in hexadecimal formReason (R): Hexadecimal representation is short as compared to binary representation. |
| 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 true, R is false |
| D. | A is false, R is true |
| Answer» E. | |
| 595. |
To count 1000 bottles in a milk plant, the minimum number of flip flops requires is |
| A. | 12 |
| B. | 10 |
| C. | 8 |
| D. | 6 |
| Answer» C. 8 | |
| 596. |
A 12 bit ADC is used to convert analog voltage of 0 to 10 V into digital. The resolution is |
| A. | 2.44 mV |
| B. | 24.4 mV |
| C. | 1.2 V |
| D. | none of the above |
| Answer» B. 24.4 mV | |
| 597. |
In a 4 bit weighted resistor D/A converter, resistor value corresponding to LSB is 32 k ohm. The resistor value corresponding to MSB is |
| A. | 32 k ohm |
| B. | 16 k ohm |
| C. | 8 k ohm |
| D. | 4 k ohm |
| Answer» E. | |
| 598. |
TTL uses |
| A. | multi-emitter transistors |
| B. | multi-collector transistors |
| C. | multi-base transistors |
| D. | multi-emitter or multi-collector transistors |
| Answer» B. multi-collector transistors | |
| 599. |
Floating gate is fabricated for making MOS |
| A. | ROM |
| B. | PROM |
| C. | EPROM |
| D. | EAROM |
| Answer» D. EAROM | |
| 600. |
Assertion (A): An encoder converts key dips to binary code.Reason (R): An encoder has more inputs than output. |
| 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 true, R is false |
| D. | A is false, R is true |
| Answer» C. A is true, R is false | |