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.
| 601. |
Machine cycle is always the same as instruction cycle. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 602. |
Assertion (A): To add 8 bit words, two 1C 74181 can be cascaded.Reason (R): In 1C 74181 a sum greater than 15 leads to high carry out. |
| 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 | |
| 603. |
Which is not a software? |
| A. | DOS |
| B. | Windows |
| C. | MS WORD |
| D. | Hard disk |
| Answer» E. | |
| 604. |
In 8086 the instruction ADD AL, CH means |
| A. | the two 8 bit values in registers AL and CH are added and result placed in register AL |
| B. | the two 8 bit values in registers AL and CH are added and result placed in register CH |
| C. | the two 16 bit values in registers AL and CH are added and result placed in register AL |
| D. | the two 16 bit values in registers AL and CH are added and result placed in register CH |
| Answer» B. the two 8 bit values in registers AL and CH are added and result placed in register CH | |
| 605. |
Read the following statements: A μP generally interfaced to several memory chips and I/O devicesAddress space provided by μP is partitioned into sub sets of addressesAddress map and address partition refer to different terms in address space Which of the above are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 1, 3 only |
| Answer» C. 2 and 3 only | |
| 606. |
Consider the following statements about Java variables Java variable must start with a letter or underscore or dollor sign.Java variable can not start with a digit.After the first character the variable can have any combination of letters or numbers.Capitalization of letters must be consistent. Which of the above are correct? |
| A. | All |
| B. | 1, 2 and 3 only |
| C. | 2, 3, 4 only |
| D. | 1, 2 and 4 only |
| Answer» B. 1, 2 and 3 only | |
| 607. |
Accumulator is an 8 bit register and is also known as register B. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 608. |
Read the following statements about files in Pascal A file can grow or shrink dynamically.A file which consists of only characters is called text file.Text files may be read and written using standard Pascal READ and WRITE procedures.Every file must have a beginning but may or may not have an end. Which of the above are correct? |
| A. | All |
| B. | 1, 2, 3 only |
| C. | 2, 3, 4 only |
| D. | 1, 2 and 4 only |
| Answer» C. 2, 3, 4 only | |
| 609. |
Consider the following statement in Basic 15 INPUT X, Y, Z20 IF Y > X THEN 2521 IF Z > Y THEN 3025 PRINT Y30 PRINT Z, X35 END IF X, Y, Z are 150, 200, 250 then the output will be |
| A. | 200, 250, 150 respectively |
| B. | 150, 200, 250 respectively |
| C. | 250, 200, 150 respectively |
| D. | 200, 150, 250 respectively |
| Answer» B. 150, 200, 250 respectively | |
| 610. |
The chip 8259 is a |
| A. | programmable interrupt controller |
| B. | programmable peripheral interface |
| C. | I/O device |
| D. | memory chip |
| Answer» B. programmable peripheral interface | |
| 611. |
An 8 bit wide 4 word sequential memory has |
| A. | Eight 4 bit shift registers |
| B. | Eight 8 bit shift registers |
| C. | Four 8 bit shift registers |
| D. | Foui 4 bit shift registers |
| Answer» B. Eight 8 bit shift registers | |
| 612. |
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» E. | |
| 613. |
In 8085 stack pointer is |
| A. | 4 bit register |
| B. | 8 bit register |
| C. | 16 bit register |
| D. | 32 bit register |
| Answer» D. 32 bit register | |
| 614. |
Windows have a user friendly program called 'Front Page Express' for creating web pages. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 615. |
Consider the following DO statement in Fortran 77 DO 23 X = 10.0, 2.0 The number of DO loop executions in the above statement is |
| A. | 10 |
| B. | 2 |
| C. | 5 |
| D. | zero |
| Answer» E. | |
| 616. |
Each instruction in assembly language program has the following fields: Lable fieldMnemonic fieldOperand fieldComment field The correct sequence of these fields is? |
| A. | 1, 2, 3, 4 |
| B. | 1, 2, 4, 3 |
| C. | 2, 1, 3, 4 |
| D. | 2, 1, 4, 3 |
| Answer» B. 1, 2, 4, 3 | |
| 617. |
Let the initial contents of ACC and CY in 8085 be CY = 1ACC = 10000001 After the instruction RAL is executed twice the contents of CY and ACC respectively will be |
| A. | 1 and 00000011 |
| B. | 0 and 00000111 |
| C. | 1 and 00000111 |
| D. | 0 and 00000011 |
| Answer» C. 1 and 00000111 | |
| 618. |
- 56 is not a valid real constant in Fortran. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 619. |
Consider the following in C int k float a ;k = 4.2a = 300 The values stored in computer memory for k and a are respectively |
| A. | 4.2 and 300 |
| B. | 4 and 300 respectively |
| C. | 4.2 and 300.00 respectively |
| D. | 4 and 300.00 respectively |
| Answer» E. | |
| 620. |
Consider the following library functions EXP (i.e., ex)ARCTAN (i.e. tan-1 x)SQRT (i.e., x)AES (i.e. |x|) Which of the above are allowed in Pascal? |
| A. | All |
| B. | 1 and 3 only |
| C. | 1, 3, 4 only |
| D. | 1, 2 and 3 only |
| Answer» B. 1 and 3 only | |
| 621. |
The sign of a floating point number depends on |
| A. | only the sign of mantissa |
| B. | only the sign of exponent |
| C. | the sign of both mantissa and exponent |
| D. | either (a) or (b) |
| Answer» B. only the sign of exponent | |
| 622. |
DOS has a command named ' DIRECTORY '. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 623. |
A modem is connected to PC at |
| A. | serial port |
| B. | parallel port |
| C. | SCSI port |
| D. | input port |
| Answer» B. parallel port | |
| 624. |
In 8085, which of the following registers cannot be paired? |
| A. | A |
| B. | E |
| C. | C |
| D. | both (b) and (c) |
| Answer» B. E | |
| 625. |
Which of the following identifiers is valid in Pascal? |
| A. | THETA |
| B. | NUM |
| C. | 1 ST |
| D. | $ BETA |
| Answer» B. NUM | |
| 626. |
If word length is 16 bits the decimal equivalent of largest number which can be stored is |
| A. | 32767 |
| B. | 32766 |
| C. | 16383 |
| D. | 16384 |
| Answer» B. 32766 | |
| 627. |
The stack pointer holds the address of the desired memory location. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 628. |
Which of the following is a valid FORTRAN assignment statement? |
| A. | 10 = N |
| B. | X + 2.1 = 5.6 |
| C. | A = B |
| D. | A = B = 1 |
| Answer» D. A = B = 1 | |
| 629. |
Mouse is a very suitable input device for computers. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 630. |
In microprocessor 8088 |
| A. | 8 data bits are multiplexed with 8 least significant bits of address bus |
| B. | 8 data bits are multiplexed with 8 most significant bits of address bus |
| C. | 16 data bits are multiplexed with 16 bits of address bus |
| D. | none of the above |
| Answer» B. 8 data bits are multiplexed with 8 most significant bits of address bus | |
| 631. |
In Java 31% gives an answer |
| A. | 3 |
| B. | 4 |
| C. | 43558 |
| D. | 43528 |
| Answer» C. 43558 | |
| 632. |
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» C. 3 and 4 respectively | |
| 633. |
Which of the following is a valid expression in FORTRAN 77? |
| A. | B * - 3 |
| B. | B * (- 3) |
| C. | B * * - 3 |
| D. | B * + 2 |
| Answer» C. B * * - 3 | |
| 634. |
The command ^C in MS WORD |
| A. | copies the text in clip board |
| B. | copies the text in secondary storage device |
| C. | copies the text in file |
| D. | None of the above |
| Answer» B. copies the text in secondary storage device | |
| 635. |
Which of these are 16 bit microprocessors? |
| A. | 80286 |
| B. | MC68000 |
| C. | Z8000 |
| D. | All |
| Answer» E. | |
| 636. |
The statement IMPLICIT INTEGER (A - F) in FORTRAN identifies |
| A. | all variable names which begin with A, B, C, D, E or F as being of integer type |
| B. | all character names which begin with A, B, C, D, E, or F as being of integer type |
| C. | all variable names which begin with A and have 6 characters |
| D. | none of the above |
| Answer» B. all character names which begin with A, B, C, D, E, or F as being of integer type | |
| 637. |
Which of these are allowed in Basic? |
| A. | Arithmetic operators +, -, *, / etc. |
| B. | Logical operators AND, OR, NOT |
| C. | Relational operators =, <, > etc. |
| D. | All of the above |
| Answer» E. | |
| 638. |
Which of the following is not a classification of programmed data transfer? |
| A. | Synchronous transfer |
| B. | Hand shaking |
| C. | Interrupt driver transfer |
| D. | Direct transfer |
| Answer» E. | |
| 639. |
In Fortran 77 negation is a unary operation. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 640. |
In the expression b = 2.1 / 1.2 * 3.1 + 3 / 7.1 * 6 which operation would have the first priority in C? |
| A. | 2.1 / 1.2 |
| B. | 1.2 * 3.1 |
| C. | 2.1 / 1.2 * 3.1 |
| D. | 3 / 7.1 |
| Answer» B. 1.2 * 3.1 | |
| 641. |
The contents of F register in 8085 are 01010001. This means |
| A. | S = 0, Z = 1, AC = 1, P = 0 and CY=1 |
| B. | S = 1, Z = 1, AC = 1, P = 0 and CY=1 |
| C. | S = 1, Z = 0, AC = 1, P = 0 and CY=1 |
| D. | S = 1, Z = 0, AC = 0, P = 0 and CY=1 |
| Answer» B. S = 1, Z = 1, AC = 1, P = 0 and CY=1 | |
| 642. |
Consider the following in object oriented programming An object is a self contained element of a computer program which represents a related group of interests.Each object has a specific role in a program.All objects can work with other objects in defined ways.Objects are also called instances Which of the above are correct? |
| A. | All |
| B. | 1, 2 and 3 only |
| C. | 1 and 2 only |
| D. | 1, 2 and 4 only |
| Answer» B. 1, 2 and 3 only | |
| 643. |
Consider the instructions MOV M, BOUT 4LDA X Which of the above uses IO/W cycle? |
| A. | 1 only |
| B. | 1 and 2 only |
| C. | 2 only |
| D. | 3 only |
| Answer» D. 3 only | |
| 644. |
In IC 74181 a sum greater than 15 leads to low carry out. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 645. |
Which of the following is not a valid arithmetic statement in C? |
| A. | x = x + 1 |
| B. | x = y * z |
| C. | x * y = z |
| D. | z = y / x |
| Answer» D. z = y / x | |
| 646. |
The operations which occur most frequently in a computer are |
| A. | fetch |
| B. | execute |
| C. | both (a) and (b) |
| D. | none of the above |
| Answer» D. none of the above | |
| 647. |
In computers the secondary memory is faster than primary memory. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 648. |
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» C. .5452 E - 3 is changed to 5.452 E - 4 but .9432 E - 4 is not changed | |
| 649. |
Which memory has read operation, byte erase, byte write and chip erase? |
| A. | RAM |
| B. | UVEPROM |
| C. | EEPROM |
| D. | both (b) and (c) |
| Answer» D. both (b) and (c) | |
| 650. |
Which of the following is not a DTP program? |
| A. | Page maker |
| B. | Coral draw |
| C. | Coral ventura |
| D. | Coral key |
| Answer» E. | |