MCQOPTIONS
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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.
| 351. |
Assertion (A): In C a character constant is either a single alphabet or digit or special symbol enclosed within single inverted commas.Reason (R): In C the maximum length of a character constant can be 2 characters. |
| 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 | |
| 352. |
Which data transfer scheme is used when large block of data is to be transferred in a computer? |
| A. | Either (a) or (b) |
| B. | Neither (a) nor (b) |
| Answer» B. Neither (a) nor (b) | |
| 353. |
The use of microprocessor control in automobiles results in |
| A. | improved fuel economy |
| B. | improved car control |
| C. | advanced information system for driver |
| D. | all of the above |
| Answer» E. | |
| 354. |
In 8086 the flag which enables or disables external interrupts is |
| A. | TF |
| B. | CF |
| Answer» B. CF | |
| 355. |
Which of the following statements is written in plain English in 8085? |
| A. | Data definition |
| B. | Assignment |
| C. | Conditional |
| D. | Repetitive |
| Answer» B. Assignment | |
| 356. |
The initial contents of ACC and CY in 8085 are CY = 1ACC = 10000001 After instruction RAL is executed once the contents of CY and ACC respectively will be |
| A. | 1 and 00000001 |
| B. | 0 and 00000001 |
| Answer» B. 0 and 00000001 | |
| 357. |
Which of the following is not a special purpose peripheral? |
| A. | Programmable Hard disc controller |
| B. | Programmable CRT controller |
| Answer» B. Programmable CRT controller | |
| 358. |
The function to Calculate the maximum value in the specified field of a database is |
| A. | DM |
| B. | DMAX |
| C. | MAX |
| D. | DBMAX |
| Answer» C. MAX | |
| 359. |
In which of the following 8085 instructions are all condition flags except CY affected? |
| A. | INR r |
| B. | SEE M |
| C. | ACI data |
| D. | ADC r |
| Answer» B. SEE M | |
| 360. |
Which of the following 8085 instructions does not belong to arithmetic group? |
| A. | SHLD addr |
| B. | SUI data |
| C. | ADCM |
| D. | INR r |
| Answer» B. SUI data | |
| 361. |
Which of the following array names is invalid in Fortran 77? |
| A. | B(2, 4) |
| B. | B(M, 3) |
| C. | B(M, R) |
| D. | B(3, 6) |
| Answer» D. B(3, 6) | |
| 362. |
8085 needs + 10 V supply. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 363. |
Consider the instructions MOV M, BOUT 4LDAX Which of the above require memory write cycle? |
| A. | 1, 2, 3 |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» D. 2 and 3 only | |
| 364. |
Almost all high level languages have provision for logical operations. |
| A. | 1 |
| B. | |
| C. | CMA |
| D. | CMC |
| Answer» B. | |
| 365. |
Which of the following is not an internal DOS command? |
| A. | MEM |
| B. | DATE |
| C. | TRAP and RST lines are high |
| D. | TRAP and RST lines are not high |
| Answer» D. TRAP and RST lines are not high | |
| 366. |
If I = J = K = 13, then in Fortran 1 = 10 - (1 / 10) * 10 + (J / 5) * 4 + K ** (- 2) is equal to |
| A. | 6 |
| B. | 5 |
| C. | 1 |
| D. | |
| Answer» B. 5 | |
| 367. |
The memory hierarchy in microprocessor based system is |
| A. | register, cache, primary, mass, off line back up |
| B. | cache, register, primary, mass, off line back up |
| C. | cache, register, mass, primary, off line back up |
| D. | register, cache, mass, primary, off line back up |
| Answer» B. cache, register, primary, mass, off line back up | |
| 368. |
The port of PC to which mouse is connected is called |
| A. | serial port |
| B. | parallel port |
| C. | input port |
| D. | scanner port |
| Answer» B. parallel port | |
| 369. |
The chip 8254 is a 40 pin programmable interval timer. The number of its independent 16 bit counters is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 370. |
Assertion (A): In 8085 when RESET OUT goes low processing begins. Reason (R): CPU remains reset till RESET IN signal goes high. |
| 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 | |
| 371. |
Read the following statements about time and space requirements of microprocessors Space requirement is also known as memory requirement.Space requirement is expressed in terms of bytes.Time requirement is expressed in terms of states.Time requirement is expressed in terms of μ- s. Which of the above statements are correct? |
| A. | 1, 2 and 3 only |
| B. | 1, 2 and 4 only |
| C. | 2 and 3 only |
| D. | 1 and 4 only |
| Answer» B. 1, 2 and 4 only | |
| 372. |
Consider the following statements about 'Functions' in C A function can be called any number of times.A function gets called when the function name is followed by a semicolon.The order in which functions are defined in a program and the order in which they are called must be the same. 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 | |
| 373. |
In Pascal if I = 45, I div 10 * 10 = |
| A. | 45 |
| B. | 40 |
| C. | 0.45 |
| D. | 0.4 |
| Answer» C. 0.45 | |
| 374. |
In a 3 byte instruction of 8085, the first, second and third byte respectively indicate |
| A. | operation code, low order byte of data/address and high order byte of data / address |
| B. | low order byte of data / address, high order byte of data / address and operation code |
| C. | high order byte of data / address, low order byte of data / address and operation code |
| D. | high order byte of data / address, operation code and low order byte of data / address |
| Answer» B. low order byte of data / address, high order byte of data / address and operation code | |
| 375. |
The combination of registers in 8085 is B-C, D-E, H-L only. |
| A. | 1 |
| B. | |
| C. | data transfer |
| D. | arithmetic |
| Answer» B. | |
| 376. |
Consider the following DO statement in Fortran 77 DO 12 A = 1.0, 5.5, 0.5 The number of DO loop executions in the above statement is |
| A. | 1 |
| B. | 11 |
| C. | 10 |
| D. | 4 |
| Answer» D. 4 | |
| 377. |
Consider the following statements about data structures in Pascal Arrays and files are types of data structures.List structure is not a data structure in Pascal.Each element of a binary tree is called a node of the tree. Which of the above are statements correct? |
| A. | All |
| B. | 1, and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» D. 2 and 3 only | |
| 378. |
A PC has typically |
| A. | Intel 8080 was the ancestor of Intel 8085 |
| B. | Intel 8080 was the ancestor of Intel Z 80 |
| C. | Intel 8080 was the ancestor of both Intel 8085 and Z 80 |
| D. | Intel 8085 was the ancestor of Intel 8085 |
| Answer» E. | |
| 379. |
Assertion (A): Microprocessor 8085 can address 65536 memory locations.Reason (R): Microprocessor 8085 has 16 address lines. |
| 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 | |
| 380. |
Which addressing mode is suitable only for these instructions in which there is only one operand? |
| A. | Direct |
| B. | Immediate |
| C. | Both A and R are correct and R is correct explanation of A |
| D. | Both A and R are correct but R is not correct explanation of A |
| Answer» B. Immediate | |
| 381. |
Which of the following characters is allowed in variable names in C? |
| A. | comma |
| B. | dot |
| C. | blank |
| D. | underscore |
| Answer» E. | |
| 382. |
Which of the following is not a valid logical expression in Pascal? |
| A. | A > = B |
| B. | A < = B |
| C. | A = < B |
| D. | A < > B |
| Answer» D. A < > B | |
| 383. |
Assume that x = 7, the Java operation x = x - means that final value of x is |
| A. | 6 |
| B. | -6 |
| C. | 10 ns |
| D. | 60 ns |
| Answer» C. 10 ns | |
| 384. |
Binary storage of decimal number 44 in 8 bits is |
| A. | 10101101 |
| B. | 101101 |
| C. | 13 |
| D. | 16 |
| Answer» B. 101101 | |
| 385. |
Which of the following integer expressions is incorrect in Pascal? |
| A. | L div M + P |
| B. | A * * B |
| C. | A div B - C |
| D. | A mod B |
| Answer» C. A div B - C | |
| 386. |
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» C. mode 0 and mode 2 | |
| 387. |
Which of the following is not a proper FORTRAN expression? |
| A. | B + * A / C |
| B. | A ** (B + 2) |
| C. | IAEG |
| D. | I 124 |
| Answer» D. I 124 | |
| 388. |
Consider the following statementsIn 8085 address and data buses are multiplexed.In Z 80 address and data buses are multiplexedIn Z 80 address and data buses are not multiplexed.Z 80 has 16 bit address bus and 8 bit data bus. Which of the above statements are correct? |
| A. | 1, 2 and 4 only |
| B. | 2 and 4 only |
| C. | 1 |
| D. | |
| Answer» D. | |
| 389. |
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» C. A is correct R is wrong | |
| 390. |
MS outlook is a software for DTP. |
| A. | 1 |
| B. | |
| C. | OFH is stored at location 02 and 0 A 5 at location 03 and address of word is 02 |
| D. | OFH is stored at location 03 and 0 A 5 at location 02 and address of word in 02 |
| Answer» C. OFH is stored at location 02 and 0 A 5 at location 03 and address of word is 02 | |
| 391. |
Read the following statements Magnetic tape is a sequential device.Magnetic disc is a direct access device.Magnetic tape and disc are both sequential devices.Magnetic tape and disc are both direct access devices. Which of the above statements are correct? |
| A. | 2 and 4 only |
| B. | 1, 2 and 3 only |
| C. | time required to access cell is same as that to access cell 65536 |
| D. | time required to access cell is less than that required to access cell 65536 |
| Answer» B. 1, 2 and 3 only | |
| 392. |
Assertion (A): Microprocessors 8086 and 8088 are very similar in organisation and have identical instruction sets.Reason (R): If clock speed is same the execution time of 8088 and 8086 are exactly equal. |
| 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 | |
| 393. |
When performing numerical calculations in floating point arithmetic Error may occur due to finite representation of numbers.Error may occur due to rounding.Error may occur due to finite representation of inherently infinite process. Which of the above are correct? |
| A. | 1 and 3 only |
| B. | 2 and 3 only |
| C. | 13 and 5 respectively |
| D. | 9 and 5 respectively |
| Answer» B. 2 and 3 only | |
| 394. |
If RADIUS = 3.0 the result of the following FORTRAN 77 program will be REAL RADIUS, CAREA, SAREA, RATIO PIPI = 3.1416READ *, RADIUS CAREA = PI * RADIUS * RADIUS SAREA = 2 * RADIUS * RADIUS RATIO = CAREA/SAREA |
| A. | 1.5708 |
| B. | 1 |
| C. | 28.2744 |
| D. | 18 |
| Answer» B. 1 | |
| 395. |
The statement ! (b < 5) in C means |
| A. | b > = 5 |
| B. | none of the above |
| C. | DMA |
| D. | Programmed data transfer |
| Answer» D. Programmed data transfer | |
| 396. |
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» B. a smaller floating point number | |
| 397. |
Which of the following array names in Fortran 77 is invalid? |
| A. | A(6) |
| B. | A(R) |
| C. | A(I) |
| D. | A(N) |
| Answer» C. A(I) | |
| 398. |
To add 8 bit words, two IC 74181 can be cascaded. |
| A. | 1 |
| B. | |
| C. | 1 and 00000011 |
| D. | 0 and 00000011 |
| Answer» B. | |
| 399. |
An e-mail message can be sent to many recipients. |
| A. | 1 |
| B. | |
| C. | special words |
| D. | reserved words |
| Answer» B. | |
| 400. |
A string variable in Basic is |
| A. | program counter etc. are being set |
| B. | program counter etc. are being reset |
| C. | either (a) or (b) |
| D. | none of the above |
| Answer» B. program counter etc. are being reset | |