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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.
| 701. |
Microprocessor 386SX is a 16/32 bit microprocessor. It has |
| A. | 16 bit registers and 32 bit data bus |
| B. | 16 bit registers and 16 bit data bus |
| C. | 32 bit registers and 32 bit data bus |
| D. | 32 bit register and 16 bit data bus |
| Answer» E. | |
| 702. |
Which of the following identifiers is invalid in Pascal? |
| A. | BETA |
| B. | MAX 40 |
| C. | 2ND |
| D. | A MAX |
| Answer» D. A MAX | |
| 703. |
In a computer the instructions, data, intermediate and final results during processing are held in ALU. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 704. |
The number of operator to accomplish basic arithmetic in Java is |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» C. 6 | |
| 705. |
In FORTRAN 77 the total number of characters in a variable can be a maximum of |
| A. | 6 |
| B. | 1 |
| C. | 8 |
| D. | 9 |
| Answer» B. 1 | |
| 706. |
A microprocessor uses 3 MHz oscillator. The duration of one T state is |
| A. | 1 μs |
| B. | 0.666 μs |
| C. | 0.333 μs |
| D. | 3 μs |
| Answer» D. 3 Œºs | |
| 707. |
In Java it is possible to have An array of integersAn array of string objectsAn array of arraysAn array on integer and strings Which of the above are correct? |
| A. | All |
| B. | 1, 2 and 3 only |
| C. | 1 and 2 only |
| D. | 1, 3 and 4 only |
| Answer» C. 1 and 2 only | |
| 708. |
Which of the following is not valid integer variable in FORTRAN 77? |
| A. | MBR |
| B. | LOTS |
| C. | JAMMU |
| D. | BRG |
| Answer» E. | |
| 709. |
A colour monitor usign 16 bits at a resolution of 600 x 400 pixels needs a memory of |
| A. | 240000 B |
| B. | 9600 B |
| C. | 6400 B |
| D. | 480000 B |
| Answer» E. | |
| 710. |
Which of the following is not an interrupt line in 8085? |
| A. | TRAP |
| B. | RST 5.5 |
| C. | RST 7.5 |
| D. | RST 9.5 |
| Answer» E. | |
| 711. |
Assertion (A): Microprocessor 8085 has on-chip oscillator with inbuilt crystal.Reason (R): For frequency stability crystal oscillator is preferred. |
| 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. | |
| 712. |
When .4546 E 5 and .5433 E 7 are to be added in normalized floating point mode |
| A. | none of the numbers is changed to any other form |
| B. | .4546 E 5 is changed .004546 E 7 and .5433 E 7 is not changed |
| C. | .5433 E 7 is changed to 54.33 E 5 and .4546 E 5 is not changed |
| D. | both the numbers are changed and their exponents are made equal to 6 |
| Answer» C. .5433 E 7 is changed to 54.33 E 5 and .4546 E 5 is not changed | |
| 713. |
The power requirements of a DRAM in active and stand by modes is about |
| A. | 350 mW and 5 mW respectively |
| B. | 350 mW each |
| C. | 5 mW each |
| D. | 350 mW and 100 mW respectively |
| Answer» B. 350 mW each | |
| 714. |
The signals in 8086 are classified into |
| A. | minimum mode and maximum mode |
| B. | decrement mode and increment mode |
| C. | low mode and high mode |
| D. | none of the above |
| Answer» B. decrement mode and increment mode | |
| 715. |
IC 7485 cannot be cascaded. |
| A. | 1 |
| B. | |
| C. | cache memory and I/O devices |
| D. | main memory and I/O devices |
| Answer» C. cache memory and I/O devices | |
| 716. |
Assertion (A): In C it is possible for functions to call themselves.Reason (R): C makes use of 'Pointers'. |
| 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 | |
| 717. |
MS Excel is an application software for financial planning. |
| A. | 1 |
| B. | |
| 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. | |
| 718. |
Which of the following is not a library string function in C? |
| A. | strlen |
| B. | strcpy |
| C. | strdup |
| D. | strbig |
| Answer» E. | |
| 719. |
Assertion (A): In register indirect addressing mode of 8085, the address of operand is in the specified register.Reason (R): An example of register indirect addressing mode is MOV, A, M.. |
| 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 | |
| 720. |
Consider the following The first letter of a Java variable is lower case.Each successive word in Java variable begins with a capital letter.All other letters are lower case.A Java variable can have a digit as first character. Which of the above are correct? |
| A. | All |
| B. | 1, 2, 3 only |
| C. | 1, 2, 4 only |
| D. | 2, 3, 4 only |
| Answer» C. 1, 2, 4 only | |
| 721. |
Consider the following ON GO TO statement in Basic 45 ON C GO TO 10, 20, 30 If the values of C are 1, 2, 3, 2.6 the control will be transferred to statement number |
| A. | 10, 20, 30, 20 respectively |
| B. | 10, 20, 20, 30 respectively |
| C. | 20, 30, 20, 10 respectively |
| D. | 10, 30, 20, 20 respectively |
| Answer» B. 10, 20, 20, 30 respectively | |
| 722. |
Which of the following conditional statements is not valid in Pascal? |
| A. | If A > = B then B : = C + D + X |
| B. | If (N = 45) THEN X : = X + 2 ELSEX : = 0 |
| C. | If A < = B then A : = C * D |
| D. | If (A > = B) X : Y else X : = Z |
| Answer» E. | |
| 723. |
Which of the following can not be used as a variable name in C? |
| A. | else |
| B. | coal |
| C. | ram |
| D. | vendy |
| Answer» B. coal | |
| 724. |
Which of the following real variable names is not valid in Fortran? |
| A. | BETA |
| B. | ALPHA |
| C. | A |
| D. | AB * 2 |
| Answer» E. | |
| 725. |
Which of the following has unique representation of 0? |
| A. | sign magnitude |
| B. | 1's complement |
| C. | 2's complement |
| D. | both (b) and (c) |
| Answer» D. both (b) and (c) | |
| 726. |
Consider the following program for 8085 MOV A, DRALMOV D, A If initial contents of register D is decimal number 20, the final content of register D is |
| A. | decimal 20 |
| B. | decimal 40 |
| C. | decimal 10 |
| D. | none of the above |
| Answer» C. decimal 10 | |
| 727. |
While selecting a memory chip the feature which should be examined is |
| A. | capacity |
| B. | ac characteristics |
| C. | dc characteristics |
| D. | all of the above |
| Answer» E. | |
| 728. |
As compared to operating current, the current drawn by a memory chip in stand by mode is |
| A. | about the same |
| B. | about one-eighth |
| C. | about 1 / 64 |
| D. | about 1 / 500 |
| Answer» C. about 1 / 64 | |
| 729. |
Zip floppy has a capacity of |
| A. | 50 MB |
| B. | 500 MB |
| C. | 25 MB |
| D. | 100 MB or 250 MB |
| Answer» E. | |
| 730. |
In 8085 the data is stored in the stack on |
| A. | First in First Out basis |
| B. | Last in First Out basis |
| C. | First in Last Out basis |
| D. | Last in Last Out basis |
| Answer» C. First in Last Out basis | |
| 731. |
Which of the following real expressions is correct in Pascal? |
| A. | #NAME? |
| B. | (X + Y) (A + B) |
| C. | Z ** M |
| D. | Z P * M |
| Answer» B. (X + Y) (A + B) | |
| 732. |
The programming language in which Excel records the macro code is |
| A. | basic |
| B. | visual basic |
| C. | video basic |
| D. | basic 2 |
| Answer» C. video basic | |
| 733. |
'Burst refresh' in DRAM is also called |
| A. | Concentrated refresh |
| B. | Distributed refresh |
| C. | Hidden refresh |
| D. | None of the above |
| Answer» B. Distributed refresh | |
| 734. |
Assertion (A): C has a large number of library functions classified as arithmetic functions, data conversion functions, character classified functions, string manipulation functions, searching and sorting functions etc.Reason (R): 8086 uses a segment : offset addressing scheme. |
| 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 | |
| 735. |
Read the following statements about files in Pascal A file is a data structure which consists of a sequence of components of the same type.The number of components in a file is variable.The components in a file can be accessed only sequentially starting from the beginning of the file. Which of the above are correct? |
| A. | All |
| B. | 1 and 2 only |
| C. | 2 and 3 only |
| D. | 1 and 3 only |
| Answer» B. 1 and 2 only | |
| 736. |
The chip 8257 is a |
| A. | programmable interrupt controller |
| B. | programmable DMA controller |
| C. | programmable peripheral interface |
| D. | none of the above |
| Answer» C. programmable peripheral interface | |
| 737. |
Which of the following is operating system? |
| A. | MS WORD |
| B. | Ventura |
| C. | Java |
| D. | Windows |
| Answer» E. | |
| 738. |
The signal in 8086 are in minimum mode when |
| A. | MN / Mx pin is tied to Vcc |
| B. | MN / Mx pin is grounded |
| C. | MN / MX pin is left open |
| D. | none of the above |
| Answer» B. MN / Mx pin is grounded | |
| 739. |
The correct way of writing the expression in Pascal is |
| A. | N * V * V / 2 + G * H / 3D |
| B. | N * V * V / 2.0 + G * H / (3.0 *D) |
| C. | N * V * V / 2 + G * H / 3.0 * D |
| D. | N * V * V / 2.0 + G * H / 3.0 * D |
| Answer» C. N * V * V / 2 + G * H / 3.0 * D | |
| 740. |
Consider the following statements about constants in 8085 The assembler treats 64 H as hexadecimal constant.The assembler treats 154 as binary constant.The assembler treats 540 as octal constant.The assembler treats 138 as decimal constant. Which of the above are correct? |
| A. | 1, 2 and 3 only |
| B. | 1, 3 and 4 only |
| C. | 1 and 3 only |
| D. | 2 and 4 only |
| Answer» C. 1 and 3 only | |
| 741. |
Assertion (A): In C arithmetic operations are pemiissible on ints, floats and chars.Reason (R): In C every arithmetic operator must be written explicitly. |
| 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 | |
| 742. |
Computers 'Basic input output system' is generally stored in RAM chips. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 743. |
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» B. D, Z, S, P, AC | |
| 744. |
Temporary register in 8085 is a 16 bit register. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 745. |
Internet is a worldwide network of computers where most of the information is freely available. |
| A. | 1 |
| B. | |
| C. | 6 decimal places |
| D. | 8 decimal places |
| Answer» B. | |
| 746. |
Consider the following statement in FORTRAN 77 READ*, [X(I) Y(I) = 0, 3, 2] Which of the following is correct? |
| A. | 2 values could be read and stored asX (0), Y (0) |
| B. | 4 values could be read and stored asX (0), Y (0), X (2), Y (2) |
| C. | 6 values could be read and stored as X (0), Y (0), Y (2), X (3), Y (3) |
| D. | none of the above |
| Answer» C. 6 values could be read and stored as X (0), Y (0), Y (2), X (3), Y (3) | |
| 747. |
A microprocessor can understand instruction written in |
| A. | machine language only |
| B. | mnemonics operation codes only |
| C. | high language only |
| D. | both machine language and mnemonics operation codes |
| Answer» B. mnemonics operation codes only | |
| 748. |
In a typical microcomputer data transfer takes place between |
| A. | μP and memory |
| B. | μP and I/O devices |
| C. | memory and I/O devices |
| D. | all of the above |
| Answer» E. | |
| 749. |
The interface chip for 8086 and 16 bit ADC is |
| A. | 8259 |
| B. | 8255 |
| C. | 8253 |
| D. | 8251 |
| Answer» C. 8253 | |
| 750. |
To multiply a number by 8 in 8085 we have to use RAL instruction |
| A. | once |
| B. | twice |
| C. | thrice |
| D. | four times |
| Answer» D. four times | |