McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering , Electronics and Communication Engineering .
| 1. |
The minimum number of transistors required to implement a two input AND gate is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 2. |
Using DeMorgan’s Theorem we can convert any AND-OR structure into |
| A. | NAND-NAND |
| B. | OR-NAND |
| C. | NAND-NOR |
| D. | NOR-NAND |
| Answer» A. NAND-NAND | |
| 3. |
For a memory with a 16-bit address space, the addressability is |
| A. | 16 bits |
| B. | 8 bits |
| C. | 2^16 bits |
| D. | Cannot be determined |
| Answer» D. Cannot be determined | |
| 4. |
Because we wish to allow each ASCII code to occupy one location in memory, most memories are _____ addressable. |
| A. | BYTE |
| B. | NIBBLE |
| C. | WORD (16 bits) |
| D. | DOUBLEWORD (32 bits) |
| Answer» A. BYTE | |
| 5. |
Circuit A is a 1-bit adder; circuit B is a 1 bit multiplier. (Hint: Construct the truth table for the adder and the multiplier) |
| A. | Circuit A has more gates than circuit B |
| B. | Circuit B has more gates than circuit A |
| C. | Circuit A has the same number of gates as circuit B |
| D. | none |
| Answer» A. Circuit A has more gates than circuit B | |
| 6. |
When the write enable input is not asserted, the gated D latch ______ its output. |
| A. | can not change |
| B. | clears |
| C. | sets |
| D. | complements |
| Answer» A. can not change | |
| 7. |
A structure that stores a number of bits taken “together as a unit” is a |
| A. | gate |
| B. | mux |
| C. | decoder |
| D. | register |
| Answer» D. register | |
| 8. |
We say that a set of gates is logically complete if we can build any circuit without using any other kind of gates. Which of the following sets are logically complete |
| A. | set of {AND,OR} |
| B. | set of {EXOR, NOT} |
| C. | set of {AND,OR,NOT} |
| D. | None of the above |
| Answer» C. set of {AND,OR,NOT} | |
| 9. |
Of the following circuits, the one which involves storage is |
| A. | RS Latch |
| B. | mux |
| C. | nand |
| D. | decoder |
| Answer» A. RS Latch | |
| 10. |
If m is a power of 2, the number of select lines required for an m-input mux is: |
| A. | m |
| B. | 2^m |
| C. | log2 (m) |
| D. | 2*m |
| Answer» C. log2 (m) | |
| 11. |
For the number A[15:0] = 0110110010001111, A[14:13] is ______ A[3:2]. |
| A. | less than |
| B. | greater than |
| C. | the same as |
| D. | cannot be determined |
| Answer» C. the same as | |
| 12. |
Which of the following conditions is not allowed in an RS latch? |
| A. | R is asserted, S is asserted |
| B. | R is asserted, S is negated |
| C. | R is negated, S is asserted |
| D. | R is negated, S is negated |
| Answer» A. R is asserted, S is asserted | |
| 13. |
Which of the following pair of gates can form a latch? |
| A. | a pair of cross coupled OR |
| B. | a pair of cross copled AND |
| C. | a pair of cross coupled NAND |
| D. | a cross coupled NAND/OR |
| Answer» C. a pair of cross coupled NAND | |
| 14. |
‘Burst refresh’ in DRAM is also called |
| A. | Concentrated refresh |
| B. | Distributed refresh |
| C. | Hidden refresh |
| D. | None of the above |
| Answer» A. Concentrated refresh | |
| 15. |
The number of interrupt lines in 8085 is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 16. |
A real number consists of |
| A. | integer part |
| B. | integer part and fraction part |
| C. | integer part, fraction part along with positive or negative sign |
| D. | none of the above |
| Answer» C. integer part, fraction part along with positive or negative sign | |
| 17. |
Assertion (A): Negative values of incremental operator in DO loop are allowed in Fortran 77 but not in earlier versions of Fortran. Reason (R): Fortran 77 has better array facilities than earlier versions of Fortran. |
| 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» B. Both A and R are correct but R is not correct explanation of A | |
| 18. |
Which of the following is not treated as hexadecimal constant by assembler in 8085? |
| A. | 45 H |
| B. | 6 AFH |
| C. | 234 |
| D. | 64 H |
| Answer» C. 234 | |
| 19. |
IC 7485 cannot be cascadeD. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» B. False | |
| 20. |
An I/O processor controls the flow of information between |
| A. | cache memory and I/O devices |
| B. | main memory and I/O devices |
| C. | two I/O devices |
| D. | cache and main memory |
| Answer» B. main memory and I/O devices | |
| 21. |
MS Access is a DBMS software. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 22. |
When .9432 E – 4 is subtracted from .5452 E – 3 in normalized floating point mode |
| A. | none of the numbers is changed |
| B. | .9432 E – 4 is changed to .09432 E – 3 and .5452 E – 3 is not changed |
| C. | .5452 E – 3 is changed to 5.452 E – 4 but .9432 E – 4 is not changed |
| D. | both Ihe numbers are changed and their exponents are, made equal to -5 |
| Answer» B. .9432 E – 4 is changed to .09432 E – 3 and .5452 E – 3 is not changed | |
| 23. |
DS directive in 8085 |
| A. | forces the assembler to reserve one byte of memory |
| B. | forces the assembler to reserve a specified number of bytes in the memory |
| C. | forces the assembler to reserve a specified number of consecutive bytes in the memory |
| D. | none of the above |
| Answer» C. forces the assembler to reserve a specified number of consecutive bytes in the memory | |
| 24. |
Which of the following is a valid integer constant? |
| A. | 127 |
| B. | 127.0 |
| C. | 127 |
| D. | 125 + 3 |
| Answer» A. 127 | |
| 25. |
The five flags in 8085 are designated as |
| A. | Z, CY, S, P and AC |
| B. | D, Z, S, P, AC |
| C. | Z, C, S, P, AC |
| D. | Z, CY, S, D, AC |
| Answer» A. Z, CY, S, P and AC | |
| 26. |
In 8085 which addressing mode is also called inherent addressing? |
| A. | Direct |
| B. | Register |
| C. | Implicit |
| D. | Immediate |
| Answer» C. Implicit | |
| 27. |
It is possible to copy a file in the same directory. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 28. |
In a computer the data transfer between hard disk and CPU is nearly the same as that between diskette and CPU. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» B. False | |
| 29. |
The timing difference between a slow memory and fast processor can be resolved if |
| A. | processor is capable of waiting |
| B. | external buffer is used |
| C. | either (a) or (b) |
| D. | neither (a) nor (b) |
| Answer» C. either (a) or (b) | |
| 30. |
In 8086 the number of bytes which can be addressed directly is about |
| A. | 1000 |
| B. | 10000 |
| C. | 100000 |
| D. | one million |
| Answer» D. one million | |
| 31. |
In Fortran 77 a variable name can contain special characters. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» B. False | |
| 32. |
Which of the following is not a general purpose peripheral? |
| A. | I/O port |
| B. | Programmable interrupt controller |
| C. | Programmable CRT controller |
| D. | Programmable interval timer |
| Answer» C. Programmable CRT controller | |
| 33. |
In one’s complement 8 bit representation 11111111 represents |
| A. | +0 |
| B. | -0 |
| C. | +1 |
| D. | -1 |
| Answer» B. -0 | |
| 34. |
The operating modes of 8255 A are called |
| A. | mode 0 and mode 1 |
| B. | mode 0, mode 1 and mode 2 |
| C. | mode 0 and mode 2 |
| D. | mode 0, mode 2 and mode 3 |
| Answer» B. mode 0, mode 1 and mode 2 | |
| 35. |
Which of the following is type declaration statement in C? |
| A. | int bar |
| B. | s = s + 1 |
| C. | king = horse + 1 |
| D. | prin = prin * prin |
| Answer» A. int bar | |
| 36. |
Internet is a worldwide network of computers where most of the information is freely available. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 37. |
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» D. 11 decimal places | |
| 38. |
In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is |
| A. | assignment, relational, arithmetic |
| B. | relational, assignment, arithmetic |
| C. | arithmetic, assignment, relational |
| D. | arithmetic, relational, assignment |
| Answer» D. arithmetic, relational, assignment | |
| 39. |
In 8085, the pins for SID and SOD are |
| A. | 4 and 5 respectively |
| B. | 5 and 4 respectively |
| C. | 3 and 4 respectively |
| D. | 4 and 3 respectively |
| Answer» B. 5 and 4 respectively | |
| 40. |
Assertion (A): Each memory chip has its own address latch. Reason (R): ALE signal comes out of microprocessor 8085 and goes to memory chip. |
| 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» D. A is wrong R is correct | |
| 41. |
An e-mail message can be sent to many recipients. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 42. |
In C the keywords are also called |
| A. | special words |
| B. | reserved words |
| C. | class words |
| D. | character words |
| Answer» B. reserved words | |
| 43. |
The character set of Fortran 77 includes lower case alphabets a to z. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» B. False | |
| 44. |
Which memory has read operation, byte erase, byte write and chip erase? |
| A. | RAM |
| B. | UVEPROM |
| C. | EEPROM |
| D. | both (b) and (c) |
| Answer» C. EEPROM | |
| 45. |
The forms of IF statements in FORTRAN 77 are called |
| A. | logical IF and Block IF |
| B. | logical IF, block IF and arithmetic IF |
| C. | logic IF, block IF, arithmetic IF and negate IF |
| D. | logical IF and arithmetic IF |
| Answer» B. logical IF, block IF and arithmetic IF | |
| 46. |
In 8085 |
| A. | P flag is set when the result has even parity |
| B. | P flag is set when the result has odd parity |
| C. | P flag is reset when the result has odd parity |
| D. | P flag is reset when the result has even parity |
| Answer» A. P flag is set when the result has even parity | |
| 47. |
If the sign bit of mantissa is 0 and the exponent is increased from a positive to a more negative number the result is |
| A. | a larger floating point number |
| B. | a smaller floating point number |
| C. | either (a) or (b) depending on the actual number |
| D. | a negative floating point number |
| Answer» A. a larger floating point number | |
| 48. |
A microprocessor is a chip integrating all the functions of a CPU of a computer. |
| A. | multiple |
| B. | single |
| C. | double |
| D. | triple |
| Answer» B. single | |
| 49. |
Microprocessor is a/an circuit that functions as the CPU of the compute |
| A. | electronic |
| B. | mechanic |
| C. | integrating |
| D. | processing |
| Answer» A. electronic | |
| 50. |
Microprocessor is the of the computer and it perform all the computational tasks |
| A. | main |
| B. | heart |
| C. | important |
| D. | simple |
| Answer» B. heart | |
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