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MCQOPTIONS
This section includes 883 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics & Communication Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 651. |
E-mail can be used to send text, graphics, and video. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 652. |
Assertion (A): In 8085, the zero flag is set when ALU operation results in 0. If the result is not 0, this flag is reset.Reason (R): In 8085 the S flag is set when the contents of accumulator become negative during execution of an instruction. |
| 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. | |
| 653. |
Which of the following methods does not cause any reduction in instruction length? |
| A. | Using program counter |
| B. | Common source and destination address |
| C. | Implicit source and destination address |
| D. | Machine language programming |
| Answer» E. | |
| 654. |
Parity means the same as positive or negative number. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 655. |
For decimal numbe'r 13.5, the floating point representation in 4 byte excess 128 code is |
| A. | 01101100 00000000 00000000 10000100 |
| B. | 00000000 01101100 00000000 10000100 |
| C. | 00000000 01101100 10000100 00000000 |
| D. | 01101100 00000000 10000100 00000000 |
| Answer» B. 00000000 01101100 00000000 10000100 | |
| 656. |
In 8086 the word address is |
| A. | the address of the least significant byte |
| B. | the address of most significant byte |
| C. | either (a) or (b) depending on the word |
| D. | neither (a) nor (b) |
| Answer» B. the address of most significant byte | |
| 657. |
Which of the following 8085 instructions do not effect CY flag? |
| A. | SEE M |
| B. | SEE R |
| C. | DCRM |
| D. | ADC M |
| Answer» D. ADC M | |
| 658. |
Consider the following features of 'structures' in C? The values of a structure variable can be assigned to another structure variable of the same type using the assignment operator.One structure can be nested within another structure.A variable structure can also be passed to a function. Which of the above are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» B. 1 and 2 only | |
| 659. |
For an accurate clock period in 8085 it is preferable to use |
| A. | Crystal |
| B. | Crystal or LC resonant circuit |
| C. | Crystal or RC circuit |
| D. | LC or RC circuit |
| Answer» B. Crystal or LC resonant circuit | |
| 660. |
Contents of RAM cannot be altered. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 661. |
A mP contains 2 MHz crystal. The time taken to complete instructions with 1000 cycles is |
| A. | 2 ms |
| B. | 1 ms |
| C. | 2 nx |
| D. | 1 ns |
| Answer» C. 2 nx | |
| 662. |
Consider the following program in Basic 10 READ X, Y, Z15 DATA 20, 30, 1020 S = X + Y + Z30 A = S/335 PRINT S, A, X, Y, Z40 END The output will be |
| A. | 60, 20, 20, 30, 10 |
| B. | 10, 30, 20, 20, 60 |
| C. | 60, 20, 30, 10, 20 |
| D. | 60, 30, 10, 20, 20 |
| Answer» B. 10, 30, 20, 20, 60 | |
| 663. |
In direct addressing mode of 8085 |
| A. | All instructions are 3 bytes long |
| B. | All instructions are 3 bytes long except IN instruction which is 2 bytes long |
| C. | All instructions are 3 bytes long except IN and OUT instructions which are 2 bytes long |
| D. | All instructions are 2 bytes long |
| Answer» D. All instructions are 2 bytes long | |
| 664. |
Consider the following part of a C program float a, b b = (a > 4 ? 2 : 9);Assuming that a has values of 3 and 6, the values stored respectively will be |
| A. | 2 and 9 |
| B. | 2.0 and 9.0 |
| C. | 2.0 and 2.0 |
| D. | 9.0 and 2.0 |
| Answer» E. | |
| 665. |
A computer program is used to read M and print the sum 2 + 4 + 6 + 8 +.........+ 2M. If M = 9 , the print out will show the number |
| A. | 9 |
| B. | 18 |
| C. | 90 |
| D. | 100 |
| Answer» D. 100 | |
| 666. |
Which of the following is a valid real constant? |
| A. | -81.56 |
| B. | 73 |
| C. | 10254,1 |
| D. | 42 |
| Answer» B. 73 | |
| 667. |
In Java which operator can be used even if there is a single operand |
| A. | + |
| B. | - |
| C. | * |
| D. | % |
| Answer» C. * | |
| 668. |
A 37 bit mantissa has an accuracy of |
| A. | 6 decimal places |
| B. | 8 decimal places |
| C. | 10 decimal places |
| D. | 11 decimal places |
| Answer» E. | |
| 669. |
Which of the following is not correct in C? |
| A. | 6 / 4 = 1 |
| B. | 2 / 5 = 0 |
| C. | 2.0 / 5 = 0 |
| D. | 2.0 / 5.0 = 0.4 |
| Answer» D. 2.0 / 5.0 = 0.4 | |
| 670. |
Let JCOKE = 20 and LPEPSI =15. Consider the statement IF(2* JCOKE. LE. LPEPSI)JCOKE = JCOKE + 5 JCOKE = JCOKE + 3 The value of JCOKE after the execution of above statement will be |
| A. | 25 |
| B. | 23 |
| C. | 15 |
| D. | 17 |
| Answer» C. 15 | |
| 671. |
Which 8085 instruction causes exchange of contents of stack pointer with the contents of H L register pair? |
| A. | XTHL |
| B. | PCHL |
| C. | LHLD |
| D. | MVIA |
| Answer» B. PCHL | |
| 672. |
A microprocessor is generally |
| A. | single chip SSI |
| B. | single chip MSI |
| C. | single chip LSI |
| D. | any of the above |
| Answer» D. any of the above | |
| 673. |
Assertion (A): An instruction cycle consists of fetch and execute cycles.Reason (R): Fetch cycle has one machine cycle but execute cycle may have one or more machine cycles depending on length of instruction. |
| 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 | |
| 674. |
If it is desired to tabulate number of students in a class in Fortran language, a proper variable name is |
| A. | ST |
| B. | STUD |
| C. | NSTUD |
| D. | STD |
| Answer» D. STD | |
| 675. |
In C the range of real constants expressed in exponential form is |
| A. | -2.3 e 37 to + 2.3 e 37 |
| B. | -3.4 e 38 to + 3.4 e 38 |
| C. | -3.4 e 37 to + 3.4 e 37 |
| D. | -2.3 e 38 to + 2.3 e 38 |
| Answer» D. -2.3 e 38 to + 2.3 e 38 | |
| 676. |
Assertion (A): Structures are useful in DBMS.Reason (R): Structures are very large numbers of applications besides DBMS. |
| 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 | |
| 677. |
Consider the directive T : DS105. This directive |
| A. | directs the assembler to reserve a sequence of 105 bytes in the memory |
| B. | directs the assembler to reserve a sequence of 105 bits in the memory |
| C. | directs the assembler to reserve a sequence of consecutive 105 bytes in the memory |
| D. | directs the assembler to reserve a sequence of consecutive 105 bits in the memory |
| Answer» D. directs the assembler to reserve a sequence of consecutive 105 bits in the memory | |
| 678. |
Consider the following statements EEPROM has the problem of high write time.EEPROM has the problem of limited number of write cycles.Shadow RAM has the problem of high write time. Which of the above statements are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» C. 1 and 3 only | |
| 679. |
Which characteristic of a memory chip is called ac characteristics? |
| A. | Power consumption |
| B. | Bus loading |
| C. | Timing characteristic |
| D. | All of the above |
| Answer» D. All of the above | |
| 680. |
Read the following rules for scanning Boolean expressions in Pascal The expressions are scanned from left to right.The operations are scanned in the order NOT, AND, OR.All operators (i.e., NOT, AND and OR) are scanned together.In one scanning all the operators of only one type are scanned. Which of the above are correct? |
| A. | All |
| B. | 1, 2 and 3 only |
| C. | 1, 2 and 4 only |
| D. | 2, 3 and 4 only |
| Answer» D. 2, 3 and 4 only | |
| 681. |
Which of the following is not a legal subscript? |
| A. | J + 2 |
| B. | JA - 4 |
| C. | -3 |
| D. | 3* IA - 2 |
| Answer» D. 3* IA - 2 | |
| 682. |
Consider the following statement in Fortran 77 READ *, (X.(I), I = 0, 4) Which of the following is correct? |
| A. | 3 values would be read and stored in X (0), X (1), X (2) |
| B. | 4 values would be read and stored in X (0), X (1), X (2), X (3) |
| C. | 5 values would be read and stored in X (0), X (1), X (2), (3)(4) |
| D. | 5 values would be read and stored in X (I), X (2), X (3), X (4), X (5) |
| Answer» D. 5 values would be read and stored in X (I), X (2), X (3), X (4), X (5) | |
| 683. |
To realize the full power of 8086 the pin of 8086 connected to ground is |
| A. | DEN |
| B. | ALE |
| C. | INTR |
| D. | MN / MX |
| Answer» E. | |
| 684. |
Consider the following operation in a computerMultiplication of scalarIversion of matrixPrinting a line of 120 characters on a printer Which of the above is a subroutine? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 1, 2 and 3 |
| D. | 2 only |
| Answer» D. 2 only | |
| 685. |
In Pascal if I = 55, 10 * I div 10 = |
| A. | 55 |
| B. | 50 |
| C. | 5.5 |
| D. | 5 |
| Answer» B. 50 | |
| 686. |
If the mantissa has a sign bit of 0 and the exponent is changed from a negative number to a more positive number the result is |
| A. | a positive number and closer to zero |
| B. | a positive number and away from zero |
| C. | a negative number |
| D. | a negative number and closer to zero |
| Answer» B. a positive number and away from zero | |
| 687. |
One can format a disc using window explorer. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 688. |
Assertion (A): Logical group of instructions contains instructions for logic operations.Reason (R): Data transfer group instruction is basically a copying instruction. |
| 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 | |
| 689. |
In a multi-processor configuration two coprocessors are connected to host 8086 processor. The instruction sets of the two coprocessors |
| A. | must be same |
| B. | may overlap |
| C. | must be disjoint |
| D. | must be the same as that of host |
| Answer» E. | |
| 690. |
In the integer expression - A * B div C + D which operation is done first in Pascal |
| A. | - |
| B. | * |
| C. | div |
| D. | + |
| Answer» B. * | |
| 691. |
The decimal equivalent of binary 1101.11 is |
| A. | 9.75 |
| B. | 13.75 |
| C. | 11.5 |
| D. | 11.75 |
| Answer» C. 11.5 | |
| 692. |
Which of the following is a computer language? |
| A. | MS WORD |
| B. | Page maker |
| C. | MS EXCEL |
| D. | LISP |
| Answer» E. | |
| 693. |
If N = 196, the result of the following program will be INTEGER N, DIGIT 1, DIGIT 2, DIGIT 3, SUMREAD*, NDIGIT 1 = N - (N / 10)* 10 N = N / 10DIGIT 2 = N - (N / 10)* 10 N = N / 10DIGIT 3 = N - (N / 10)* 10SUM = DIGIT 1 + DIGIT 2 + DIGIT 3 |
| A. | 196 |
| B. | 16 |
| C. | 16 |
| D. | 196 |
| Answer» C. 16 | |
| 694. |
If 8085 is required to add two 32 bit numbers, the numbers of addition sequences is |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 8 |
| Answer» D. 8 | |
| 695. |
It is possible to copy a file in the same directory. |
| A. | 1 |
| B. | |
| C. | + |
| D. | - |
| Answer» B. | |
| 696. |
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 | |
| 697. |
In super computers the extra level of primary memory is generally called |
| A. | Solid state device |
| B. | Single stage device |
| C. | Digital state device |
| D. | Surface stage device |
| Answer» B. Single stage device | |
| 698. |
The number of logic or arithmetic operations with ALU 1C 74181 can carry out is |
| A. | 4 |
| B. | 8 |
| C. | 16 |
| D. | 32 |
| Answer» D. 32 | |
| 699. |
If INT = 50 and LOOT = 30, the result of assignment statement SAL = INT + LOOT is |
| A. | 50 |
| B. | 80 |
| C. | 8 |
| D. | 5 |
| Answer» C. 8 | |
| 700. |
Which one is true for writing array variable in Pascal? |
| A. | The general form of an array variable is an integer or a real variable name followed by subscripts enclosed within square brackets. The subscripts are separated by commas |
| B. | The general form of an array variable must be an integer name followed by subscripts enclosed within square brackets. The subscripts are separated by commas |
| C. | The subscripts in array variable must be separated by dots |
| D. | The subscripts must be enclosed within parenthesis |
| Answer» B. The general form of an array variable must be an integer name followed by subscripts enclosed within square brackets. The subscripts are separated by commas | |