MCQOPTIONS
Saved Bookmarks
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.
| 451. |
Consider the following in C Arithmetic operations can be performed on ints.Arithmetic operations can be performed on floats.Arithmetic operation can be performed on chars 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 | |
| 452. |
Assertion (A): C has 32 keywords like auto, if, do, float etc.Reason (R): Key words can not be used as variable names in C. |
| A. | A is correct R is wrong |
| B. | A is wrong R is correct |
| C. | 1, 2, 3, 4 are correct |
| D. | 1, 3, 4 are correct |
| Answer» C. 1, 2, 3, 4 are correct | |
| 453. |
A high level language is less efficient than machine language. |
| A. | 1 |
| B. | |
| C. | 2500 |
| D. | 100000 |
| Answer» B. | |
| 454. |
Consider the following about 'return' statement in C On executing the return statement, it immediately transfers the control back to the calling program.There is no restriction on the number of 'return' statements present in a function.The 'return' statement must be present at the end of called 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» C. 1 and 3 only | |
| 455. |
Which of the following is not a valid character constant in C? |
| A. | 'A' |
| B. | '2' |
| C. | '=' |
| D. | 2 |
| Answer» E. | |
| 456. |
The organisatioion of Intel memory chip 127256 is |
| A. | 32 K x 8 |
| B. | 16 K x 8 |
| C. | 32 K x 4 |
| D. | 16 K x 4 |
| Answer» B. 16 K x 8 | |
| 457. |
The box on the external left of the title bar of menu is called control menu box. |
| A. | 1 |
| B. | |
| C. | 4 |
| D. | 8 |
| Answer» B. | |
| 458. |
Both ROM and RAM can be accessed randomly. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 459. |
Internally the two distinct units of 8086 are called |
| A. | bus interface unit and execution unit |
| B. | command unit and follow unit |
| C. | master unit and slave unit |
| D. | memory unit and operation unit |
| Answer» B. command unit and follow unit | |
| 460. |
Consider the following logical IF statement in FORTRAN 77 IF (SALT. EQ. PEPPER) GO TO 11GOTO 13 The above statement using arithmetic IF statement would be |
| A. | IF (SALT - PEPPER) 13, 11, 13 |
| B. | IF (SALT - PEPPER) 11, 11, 13 |
| C. | IF (SALT - PEPPER) 11, 13, 13 |
| D. | IF (SALT - PEPPER) 13, 11, 11 |
| Answer» B. IF (SALT - PEPPER) 11, 11, 13 | |
| 461. |
If CS = A15 A14 A13 is used as chip select logic of a 4 K RAM in 8085 system, its memory range is |
| A. | 3000 H - 3 FFF H |
| B. | 7000 H - 7 FFFH |
| C. | 5000 H - 5 FFF H and 6000 H - 6 FFF H |
| D. | 6000 H - 6 FFF H and 7000 H - 7 FFF H |
| Answer» E. | |
| 462. |
Some words like READ, WRITE, STOP etc. cannot be used as variable names in Fortran 77. |
| A. | 1 |
| B. | |
| C. | SEE M |
| D. | SEE R |
| Answer» B. | |
| 463. |
Which of the following is a valid real variable in FORTRAN 77? |
| A. | KPR |
| B. | LINE |
| C. | JOB |
| D. | RATE |
| Answer» E. | |
| 464. |
Which of the following is correct in FORTRAN 77? |
| A. | PARAMETER PMOS = 9.8, NMOS = X |
| B. | PARAMETER (PMOS = 9.8, NMOS = X) |
| C. | PARAMETER PMOS = 9.8, NMOS = X |
| D. | PARAMETER PMOS, NMOS = 9.8, X |
| Answer» C. PARAMETER PMOS = 9.8, NMOS = X | |
| 465. |
Consider the following statements about 8085 The instruction LDA uses direct addressing mode.The instruction MVI uses direct addressing mode.The instruction MVI uses immediate addressing mode.The instruction LDA uses immediate addressing mode. Which of the above are correct? |
| A. | 1 and 3 only |
| B. | 3 and 4 only |
| C. | 1 and 2 only |
| D. | 2 only |
| Answer» B. 3 and 4 only | |
| 466. |
Windows can run several tasks simultaneously. |
| 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 | |
| 467. |
Which of the following produces very wide drifts in clock frequency? |
| A. | Crystal |
| B. | RC circuit |
| C. | LC resonant circuit |
| D. | Crystal and RC circuit |
| Answer» C. LC resonant circuit | |
| 468. |
Which of the following 8 bit microprocessors has maximum addressing modes? |
| A. | 8085 |
| B. | Z 80 |
| C. | 6800 |
| D. | 6809 |
| Answer» E. | |
| 469. |
ALE stands for |
| A. | Address Latch Enable |
| B. | Accumulator Latch Enter |
| C. | Address Latch Enter |
| D. | Accumulator Latch Enable |
| Answer» B. Accumulator Latch Enter | |
| 470. |
Which of the following instruction modes does not exist in microprocessor 8085? |
| A. | Inherent |
| B. | Immediate |
| C. | Absolute |
| D. | Indirect |
| Answer» E. | |
| 471. |
The maximum number of alphabets/digits or special symbots for character constants in C is |
| A. | 4 |
| B. | 8 |
| C. | 1 |
| D. | |
| Answer» B. 8 | |
| 472. |
An arithmetic statement in C must be |
| A. | integer mode arithmetic statement |
| B. | real mode arithmetic statement |
| C. | mixed mode arithmetic statement |
| D. | any of the above |
| Answer» E. | |
| 473. |
In Pascal an array declaration provides information to the Pascal processor to enable it to |
| A. | identify the variable as an array name |
| B. | reserve memory locations to store all the components of array |
| C. | check the values computed for subscripts expressions during program execution with the specified lower and upper limits of subscripts |
| D. | all of the above |
| Answer» E. | |
| 474. |
Assertion (A): A good algorithm should be fast, require minimal computer memory and time.Reason (R): Many times an algorithm is prepared in the form of a flow chart. |
| A. | A is correct R is wrong |
| B. | A is wrong R is correct |
| C. | registers |
| D. | cache memory |
| Answer» C. registers | |
| 475. |
The two orientations of worksheet page are called |
| A. | portrait and landscape |
| B. | auto text and auto correct |
| C. | font and footer |
| D. | header and footer |
| Answer» B. auto text and auto correct | |
| 476. |
In computers the size of secondary memory is usually much larger than that of primary memory. |
| A. | 1 |
| B. | |
| C. | all operations are on 8 bit data |
| D. | majority of operations are on 8 bit data |
| Answer» B. | |
| 477. |
Consider the following statements An assembler is a program having assembly language program as input and machine language program as output.A macro assembler is an assembler with additional macro facilities.A cross assembler for a μP X is an assembler which executes on source microcomputer with a different CPU than X bit generates code for X.Assemblers generally do not provide macro facilities. Of the above statement |
| A. | All are correct |
| B. | only 1, 2, 3 are correct |
| C. | only 1, 2, 4 are correct |
| D. | only 1, 3, 4 are correct |
| Answer» C. only 1, 2, 4 are correct | |
| 478. |
The range of floating point numbers in Java is |
| A. | 1.4 E - 45 to 3.4 E + 38 |
| B. | 3.4 E - 45 to 1.4 E + 38 |
| C. | 1.4 E - 38 to 3.4 E + 45 |
| D. | 3.4 E - 38 to 1.4 E + 45 |
| Answer» B. 3.4 E - 45 to 1.4 E + 38 | |
| 479. |
In 8086 the number of bytes which can be addressed directly is about |
| A. | 1000 |
| B. | 10000 |
| C. | 100000 |
| D. | one million |
| Answer» E. | |
| 480. |
Which of the following is not an application software? |
| A. | MS Word |
| B. | DBMS |
| C. | Worksheet |
| D. | Lisp |
| Answer» E. | |
| 481. |
A memory system has a 9 chips. If MTBF of one clip is 900 000 hours, MTBF of complete memory system is |
| A. | 900000 hours |
| B. | 100000 hours |
| C. | 8100000 hours |
| D. | 1800000 hours |
| Answer» C. 8100000 hours | |
| 482. |
In windows the middle button of mouse is not used. |
| A. | 1 |
| B. | |
| C. | 16 bit registers and 16 bit data bus |
| D. | 8 bit registers and 8 bit data bus |
| Answer» B. | |
| 483. |
The total number of pins in 8085 are |
| A. | 20 |
| B. | 30 |
| C. | 40 |
| D. | 50 |
| Answer» D. 50 | |
| 484. |
If the resolution of a printer is 1200 dpi, the number of dots per square inch is |
| A. | 1200 |
| B. | 800 |
| C. | 1200 x 1200 |
| D. | either (a) or (b) |
| Answer» D. either (a) or (b) | |
| 485. |
When one operand is real and one integer in Pascal, which of the following operations are not allowed? |
| A. | + and - |
| B. | * |
| C. | / |
| D. | Div and Mod |
| Answer» E. | |
| 486. |
Which of the following is not a valid variable in FORTRAN 77? |
| A. | BRG |
| B. | VS |
| C. | VS 3A |
| D. | 3 VSA |
| Answer» E. | |
| 487. |
Consider the following about 'arrays' in C An array is a collection of similar elements.An array can not have 10 numbers 5 of which are ints and 5 are floats.An array can have ints and chars in the same array. Which of the above 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 | |
| 488. |
Assertion (A): Microprocessor 8085 has an 8 bit register called accumulator which stores intermediate answers during a computer operation.Reason (R): Accumulator can send or receive data. |
| 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 | |
| 489. |
In 8085 the instruction MOV A, M is an example of |
| A. | Direct addressing |
| B. | Immediate addressing |
| C. | Register addressing |
| D. | Register indirect addressing |
| Answer» E. | |
| 490. |
A computer program is used to read N and print the sum 12 + 22 + 32 +.....+ N2. If N = 10, the print out will show the number |
| A. | 100 |
| B. | 10 |
| C. | 385 |
| D. | 285 |
| Answer» D. 285 | |
| 491. |
In a RAM chip with a total of 8096 words, the word addresses range from |
| A. | 1 to 8096 |
| B. | 0 to 8095 |
| C. | 1 to 8095 |
| D. | 0 to 8096 |
| Answer» C. 1 to 8095 | |
| 492. |
In C the keywords are also called |
| A. | special words |
| B. | reserved words |
| C. | class words |
| D. | character words |
| Answer» C. class words | |
| 493. |
Assertion (A): Microprocesspr 8085 has six 8 bit registers B, C, D, E, H L.Reason (R): B - C, D - E, H - L may be combined to form register pairs to hold 16 bits data. |
| 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 | |
| 494. |
If KMT = 100, LITRES = 5.0, PCOST = 28.0 and OPCOST = 70.0 what will be the result of the following FORTRAN 77 program? INTEGER KMTREAL LITRES, PCOST, OPCOST, PKCOST READ *, KMT, LITRES, PCOST, OPCOST, PKCOST KMPL = KMT/LITRES PKCOST = (PCOST * LITRES + OPCOST)/ KMT |
| A. | 2 |
| B. | 2.1 |
| C. | 21 |
| D. | 21 |
| Answer» C. 21 | |
| 495. |
Consider the following program for 8085MVIA, 00HMVIA, 53H CMAThe contents of accumulator at the end of this program will be |
| A. | OACH |
| B. | 53 H |
| C. | OADH |
| D. | 54 H |
| Answer» B. 53 H | |
| 496. |
The read and write cycle times of cache memory are in the range of |
| A. | 1 - 3 ns |
| B. | 25 ns - 45 ns |
| C. | 200 ns - 300 ns |
| D. | 1 μs |
| Answer» C. 200 ns - 300 ns | |
| 497. |
Assertion (A): Most PCs use static RAM for main memory.Reason (R): Static RAM is faster than dynamic RAM. |
| 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. | |
| 498. |
In FORTRAN 77 FLOAT (-28) gives the value |
| A. | 28 |
| B. | -28 |
| C. | -28 |
| D. | none of the above |
| Answer» D. none of the above | |
| 499. |
Which of the following directives in 8085 causes two bytes to be reserved in the memory? |
| A. | D S |
| B. | D B |
| C. | D W |
| D. | E Q U |
| Answer» D. E Q U | |
| 500. |
In which of the following logical group instructions of 8085 do the contents of accumulator remain unchanged? |
| A. | ORA r |
| B. | ORA M |
| C. | ORI data |
| D. | CMP r |
| Answer» E. | |