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.
| 851. |
In 8085 |
| A. | RST 6.5 and RST 5.5 are high level sensitive interrupts |
| B. | RST 6.5 and RST 5.5 are low level sensitive interrupts |
| C. | RST 5.5 is low level sensitive interrupt but RST 5.5 is high level-sensitive interrupt |
| D. | RST 5.5 is low level sensitive interrupt but RST 6.5 is high level sensitive interrupt |
| Answer» B. RST 6.5 and RST 5.5 are low level sensitive interrupts | |
| 852. |
In which group of 8085 instructions condition flags are not affected? |
| A. | Data transfer group |
| B. | Arithmetic group |
| C. | Logical group |
| D. | Both (a) and (c) |
| Answer» B. Arithmetic group | |
| 853. |
For Disk partitioning th DOS command is |
| A. | F DISK |
| B. | H DISK |
| C. | A DISK |
| D. | D DISK |
| Answer» B. H DISK | |
| 854. |
Consider the following program in C int k;float a, b, c;k = a* b* c / 100 + 2.5 / 2 - 0.3 * 9 if a - 5.0, b = 2.0 and c = 3.0 the final result k = |
| A. | 1 |
| B. | -1 |
| C. | 1.15 |
| D. | -1.15 |
| Answer» C. 1.15 | |
| 855. |
In 8085, which instructions are useful for writing and using subroutines? |
| A. | CALL |
| B. | RET |
| C. | CALL and RET |
| D. | none of the above |
| Answer» D. none of the above | |
| 856. |
IC 74181 has two select lines. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 857. |
Which of the following is a valid real constant in FORTRAN 77? |
| A. | 1.2 E 231 |
| B. | 3 E - 2 |
| C. | -3.2 E 2.3 |
| D. | 1.2 E 23 |
| Answer» B. 3 E - 2 | |
| 858. |
When the mains supply is switched off the contents of primary computer memory are lost. |
| A. | 1 |
| B. | |
| Answer» B. | |
| 859. |
Most of the memory chips in static RAM |
| A. | do not require any supply |
| B. | need 2 V supply |
| C. | need 5 V supply |
| D. | need 12 V supply |
| Answer» D. need 12 V supply | |
| 860. |
For a 16 bit computer the range of integer constants in C is |
| A. | -32768 to + 32767 |
| B. | -32767 to + 32768 |
| C. | -65536 to + 65535 |
| D. | -65535 to + 65536 |
| Answer» B. -32767 to + 32768 | |
| 861. |
If A = 20 and B = - 7 in PASCAL, A mod B = |
| A. | 6 |
| B. | 2 |
| C. | -1 |
| D. | 3 |
| Answer» B. 2 | |
| 862. |
Consider the following rules about integer constant in C An integer constant must have at least one digit.An integer constant must not have a decimal point.An integer constant may be positive or negative.The default sign is positive.A maximum of one comma or blank is allowed. Which of the above are correct? |
| A. | All |
| B. | 1, 2, 3, 4 only |
| C. | 1, 2, 3, 5 |
| D. | 2, 3, 4, 5 only |
| Answer» C. 1, 2, 3, 5 | |
| 863. |
Assertion (A): In 8085 WR and RD signals are active high.Reason (R): LOW WR means write operation and low RD means read operation. |
| 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. | |
| 864. |
JCOKE = 3JCOKE = JCOKE + 1GO TO (5, 8, 9, 11, 15, 16 18, 20) JCOKE.After the execution of above statement, the control is transferred to statement number |
| A. | 8 |
| B. | 11 |
| C. | 16 |
| D. | 20 |
| Answer» C. 16 | |
| 865. |
Which of the following is a valid integer constant? |
| A. | 127 |
| B. | 127 |
| C. | 127 |
| D. | 125 + 3 |
| Answer» B. 127 | |
| 866. |
Z flag is reset if an ALU operation results in 0. |
| A. | 1 |
| B. | |
| C. | 350 mW and 5 mW respectively |
| D. | 350 mW each |
| Answer» C. 350 mW and 5 mW respectively | |
| 867. |
In ALU 1C 74181 the addition and subtraction is in |
| A. | 2's complement |
| B. | 1's complement |
| C. | binary |
| D. | none of the above |
| Answer» B. 1's complement | |
| 868. |
Assertion (A): A PROM is a user programmable ROM.Reason (R): After programming PROM behaves like ROM. |
| 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 | |
| 869. |
Which of the following is not an integer constant? |
| A. | 0 |
| B. | -8 |
| C. | 1074 |
| D. | -8.1 |
| Answer» E. | |
| 870. |
The proper exponential form of - 0.0032 in FORTRAN 77 is |
| A. | -3.2 E - 3 |
| B. | -0.0032 |
| C. | -0.00032 EI |
| D. | -0.032 E - 1 |
| Answer» B. -0.0032 | |
| 871. |
Computer virus can hide itself in a diskette but not in a hard disk. |
| A. | 1 |
| B. | |
| C. | a few bytes |
| D. | a few kilobytes |
| Answer» C. a few bytes | |
| 872. |
Read the following statements about Java It is well suited to design software which works in conjunction with internet.It is cross platform language.Java is close to programming language C, C ++ etc.It is an object oriented. Which of the above are correct? |
| A. | All |
| B. | 1, 2 and 3 only |
| C. | 1, 2 and 4 only |
| D. | 2, 3, 4 only |
| Answer» B. 1, 2 and 3 only | |
| 873. |
Consider the following DO statement in Fortran 77 DO 52 N = 1, 10, 3 The number of DO loop executions in the above statement is |
| A. | 1 |
| B. | 10 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 874. |
MICR stands for |
| A. | Magnetic Ink Chart Receipt |
| B. | Magnetic Ink Character Recognition |
| C. | Magnetic Ink Chart Recognition |
| D. | Magnetic Ink Character Receipt |
| Answer» C. Magnetic Ink Chart Recognition | |
| 875. |
Assertion (A): Microprocessor 8085 has 16 address bus lines and 8 data bus lines.Reason (R): Address bus in 8085 is unidirectional. |
| 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 | |
| 876. |
Binary number 1101.101 is equivalent to decimal number? |
| A. | 13.5 |
| B. | 13.75 |
| C. | 13.625 |
| D. | 13.875 |
| Answer» D. 13.875 | |
| 877. |
Expression ++i is equivalent to |
| A. | i = i + 2 |
| B. | i = i + 1 |
| C. | i = i - 1 |
| D. | i = i + i + i |
| Answer» C. i = i - 1 | |
| 878. |
The number of computer viruses is some thousands. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | 2 |
| Answer» B. | |
| 879. |
In a microprocessor |
| A. | all instructions need only one machine cycle |
| B. | some instructions need only one machine cycle while some other instructions need more than one machine cycle |
| C. | all instructions need only fraction of one machine cycle |
| D. | some instructions need less than one machine cycle |
| Answer» C. all instructions need only fraction of one machine cycle | |
| 880. |
8085 has 6 sign flags. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 881. |
Which of the following is a valid logical expression in Pascal? |
| A. | 2.5 : = A |
| B. | (A + B) < < (C + D) |
| C. | A = < B |
| D. | A > = B |
| Answer» E. | |
| 882. |
In a microprocessor the clock signal |
| A. | is always generated internally |
| B. | is always supplied externally |
| C. | may be generated internally or supplied externally |
| D. | is mostly supplied externally |
| Answer» D. is mostly supplied externally | |
| 883. |
Which of the following can be accessed only sequentially? |
| A. | Floppy disk |
| B. | Hard disk |
| C. | Magnetic tape |
| D. | ROM |
| Answer» D. ROM | |