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.
| 751. |
The operator precedence in Java is in the order |
| A. | arithmetic operation, increment and decrement operation, comprassion, logical operation and assignment operation. |
| B. | increment and decrement operation, arithmetic operation, comparison, logical operation and assignment operation. |
| C. | comparison, arithmetic operation, increment and decrement operation, logical operation and assignment operation. |
| D. | arithmetic operation, comparison operation, increment and decrement operation, logical operation and assignment operation. |
| Answer» C. comparison, arithmetic operation, increment and decrement operation, logical operation and assignment operation. | |
| 752. |
Which has volatile memory? |
| A. | Magnetic tape |
| B. | RAM |
| C. | Diskette |
| D. | Hard disk |
| Answer» C. Diskette | |
| 753. |
Assertion (A): The variable name 5KING is not valid in Fortran 77.Reason (R): In Fortran 77 the first character of a variable name must be an alphabet. |
| 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 | |
| 754. |
Which of the following integer expressions is correct in Pascal? |
| A. | #NAME? |
| B. | A div B * mod C |
| C. | A - 4.0 |
| D. | A / B + D |
| Answer» B. A div B * mod C | |
| 755. |
Cache memory size is about |
| A. | a few KB |
| B. | about 500 KB |
| C. | about 1 MB |
| D. | about 50 MB |
| Answer» B. about 500 KB | |
| 756. |
DMA stands for direct memory access. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 757. |
Assertion (A): Mnemonics are used in assembly level program. Reason (R): Computer cannot understand mnemonics. |
| 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 | |
| 758. |
Consider the following rules in Fortran A signed or unsigned real variable name or a real constant is a real expression.Two real expressions connected by an arithmetic operator is a real expression.A real variable or constant exponential by an integer constant or integer variable is not valid 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 | |
| 759. |
Which of the following is not a valid variable name in C? |
| A. | p o, t |
| B. | p o t |
| C. | po_t |
| D. | p_ot |
| Answer» B. p o t | |
| 760. |
Which of the following expressions is invalid in Fortran? |
| A. | IA + IB |
| B. | IB * IC / ID |
| C. | IA * B |
| D. | #NAME? |
| Answer» D. #NAME? | |
| 761. |
ALU 1C 74181 can accept two words each having |
| A. | 2 bits |
| B. | 4 bits |
| C. | 8 bits |
| D. | 16 bits |
| Answer» C. 8 bits | |
| 762. |
Which of the following is not a valid integer constant in C (for 16 bit)? |
| A. | 321 |
| B. | -162 |
| C. | -65321 |
| D. | 1 |
| Answer» D. 1 | |
| 763. |
An instruction using immediate addressing mode in 8085 is |
| A. | 2 bytes long |
| B. | 3 bytes long |
| C. | 2 or 3 bytes long |
| D. | 1 or 2 or 3 bytes long |
| Answer» E. | |
| 764. |
Assuming that k is an integer what would the result of following expression in Ck = 2* 3 / 5 + 4 / 4 + 8 - 2 - 4 / 8 |
| A. | 8 |
| B. | 7 |
| C. | 7.5 |
| D. | zero |
| Answer» B. 7 | |
| 765. |
Consider the following program in Pascal X = 2.57X = (X + 0.06) * 10I = TRUNC (X)X = IX = X / 10.0 The final value of X would be |
| A. | 2 |
| B. | 2.6 |
| C. | 2.63 |
| D. | 26.3 |
| Answer» C. 2.63 | |
| 766. |
Incompatibility between memory and I/O device may be due to |
| A. | timing according to which data transfer is to take place |
| B. | electrical characteristics of the two devices |
| C. | format of data transfer |
| D. | all of the above |
| Answer» E. | |
| 767. |
If the absolute value of a number is less than decimal 1, the sign of exponent in floating point representation is |
| A. | zero |
| B. | negative |
| C. | zero or negative |
| D. | positive |
| Answer» D. positive | |
| 768. |
Assertion (A): C allows the use of logical operators, AND, OR, NOT.Reason (R): C has logical operators as well as bitwise operators like AND, OR etc. |
| 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 | |
| 769. |
Let JCOKE = 98 and LPEPSI = 42 Consider the statement IF (JCOKE - 3 * LPEPSI) 5, 6, 75 JCOKE = JCOKE + 56 JCOKE = JCOKE + 87 JCOKE = JCOKE + 11 The value of JCOKE after the execution of above statement will be |
| A. | 103 |
| B. | 106 |
| C. | 109 |
| D. | none of the above |
| Answer» B. 106 | |
| 770. |
To evaluate X = (A + B + 1.2) * (A + B - C) the sequence of operation is |
| A. | + + + - * = |
| B. | * + + + - = |
| C. | + + - * + = |
| D. | - + + + * = |
| Answer» B. * + + + - = | |
| 771. |
Fortran 77 has six arithmetic operators. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 772. |
Assertion (A): A dynamic RAM chip has much smaller cell than a static RAM chip.Reason (R): In dynamic RAM one bit of information is stored as the charge on a capacitor. |
| 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 | |
| 773. |
Which of the following is not a valid real constant in C? |
| A. | 1.2 e 2.0 |
| B. | -2.3 e - 2 |
| C. | -2.3 E 2 |
| D. | -2.3 e 2 |
| Answer» D. -2.3 e 2 | |
| 774. |
EEPROM permits |
| A. | read operation only |
| B. | read and byte erase operations |
| C. | read, byte erase and byte write operations |
| D. | read, byte erase, byte write and chip erase operations |
| Answer» E. | |
| 775. |
In 8085 which addressing mode is also called inherent addressing? |
| A. | Direct |
| B. | Register |
| C. | Implicit |
| D. | Immediate |
| Answer» D. Immediate | |
| 776. |
The language PL / I has |
| A. | one character set having 60 characters |
| B. | one character set having 48 characters |
| C. | one character set having 60 characters and another character set having 48 character |
| D. | none of the above |
| Answer» B. one character set having 48 characters | |
| 777. |
For the floating point numbers 1.81 x 10-29 and 0.0152 x 1018 the normalised forms are |
| A. | 0.181 x 10-28 and 0.152 x 1017 respectively |
| B. | 18.1 x 10-30 and 0.152 x 1017 respectively |
| C. | 0.181 x 10-28 and 1.52 x 1016 respectively |
| D. | None of the above |
| Answer» B. 18.1 x 10-30 and 0.152 x 1017 respectively | |
| 778. |
Consider the following expressions in Java int a, b, c, a = 40;b = a++ ;c = ++a ;Now the values of a, b, c are |
| A. | 42, 40, 42 respectively |
| B. | 42, 42, 42 respectively |
| C. | 40, 42, 42 respectively |
| D. | 40, 40, 42 respectively |
| Answer» B. 42, 42, 42 respectively | |
| 779. |
Consider the following statements for 8085 The most significant 8 bits of address are transmitted on the 8 lines on which data is transmitted.Eight pins are dedicated to transmit the most significant 8 bits of memory address.The least significant 8 bits of address are transmitted on the lines on which data is transmitted.The data and leass significant 8 bits are transmitted at different points in time.Which of the above statements are correct? |
| A. | all |
| B. | 1, 2 and 3 only |
| C. | 2, 3 and 4 only |
| D. | 1, 3 and 4 only |
| Answer» D. 1, 3 and 4 only | |
| 780. |
Which of the following is not treated as hexadecimal constant by assembler in 8085? |
| A. | 64 H |
| B. | 5 AFH |
| C. | AFH |
| D. | OCFH |
| Answer» D. OCFH | |
| 781. |
The expression A2 + B2 - 3 AB when written is Pascal should be written as |
| A. | A * A + B * B - 3 A * B |
| B. | A * A + B * B - 3.0 A * B |
| C. | A * A + B * B - 3.0 * A * B |
| D. | A * A + B * A - 3 * A * B |
| Answer» D. A * A + B * A - 3 * A * B | |
| 782. |
The normalised form of 1.81 x 10-11 is |
| A. | 18.1 x 10-12 |
| B. | 18.1 x 10-13 |
| C. | 0.181 x 10-10 |
| D. | 0.0181 x 10-9 |
| Answer» D. 0.0181 x 10-9 | |
| 783. |
In 8085 microprocessor with memory mapped I/O which of the following is true? |
| A. | I/O devices have 16 bit addresses |
| B. | I/O devices are accessed during IN and OUT instructions |
| C. | There can be a maximum of 256 input and 256 output devices |
| D. | Logic operations can not be performed |
| Answer» B. I/O devices are accessed during IN and OUT instructions | |
| 784. |
In 8085 the pins for + 5 V input and ground are |
| A. | 20 and 40 respectively |
| B. | 40 and 20 respectively |
| C. | 1 and 2 respectively |
| D. | 1 and 1 respectively |
| Answer» C. 1 and 2 respectively | |
| 785. |
Assertion (A): Static RAMS are used where speed of operation is of primary concern.Reason (R): Dynamic RAM has lower cost per bit than static 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» C. A is correct R is wrong | |
| 786. |
Which of the following is not a general purpose peripheral? |
| A. | I/O port |
| B. | Programmable interrupt controller |
| C. | Programmable CRT controller |
| D. | Programmable interval timer |
| Answer» D. Programmable interval timer | |
| 787. |
The length of character constant P . b b . E . b C . is |
| A. | 9 |
| B. | 6 |
| C. | 10 |
| D. | 7 |
| Answer» D. 7 | |
| 788. |
Which characteristics of a memory chip is called dc characteristics? |
| A. | Organisation |
| B. | Timing characteristics |
| C. | Physical dimensions |
| D. | Power consumption and bus loading |
| Answer» E. | |
| 789. |
It is desired to evaluate the expression F = B cos Y + C cos2 Y + A cos3 Y The Pascal equivalent to ensure minimum computer time should be written as |
| A. | F = B * COS (Y) + C * SQR (COS (Y) + A * COS (Y) * COS (Y) * COS (Y) |
| B. | F = B * COS (Y) + C * SQR [COS (Y)] + A * COS (Y) * SQR [COS (Y)] |
| C. | F = B * COS (Y) + C * COS(Y) * COS (Y) + A * COS (Y) * COS (Y) * COS (Y) |
| D. | X = COS(Y)Z = SQR (X)F = B * X + C * Z + A * X * Z |
| Answer» E. | |
| 790. |
A microprocessor needs memory chips and input-output chip to form a microcomputer. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | 2 |
| Answer» B. | |
| 791. |
If PRIN = 200.0 and BINT = 0.0525 the result of expression INCOME = PRIN * (1 + BINT) will be |
| A. | 210 |
| B. | 210.5 |
| C. | 210.5 |
| D. | 210.5 |
| Answer» B. 210.5 | |
| 792. |
The number of interrupt lines in 8085 is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 793. |
The character set of Fortran 77 includes lower case alphabets a to z. |
| A. | 1 |
| B. | |
| C. | RAM |
| D. | UVEPROM |
| Answer» C. RAM | |
| 794. |
Which of the following is invalid in Basic? |
| A. | A ** B - C |
| B. | 5.2 ** 4.3 |
| C. | 5.2 ** (- 4.3) |
| D. | (- 5.2) ** (4.3) |
| Answer» E. | |
| 795. |
Which of the following is not a valid real constant? |
| A. | -73.1 |
| B. | 10251,3 |
| C. | 10.23 |
| D. | -5.7381 |
| Answer» C. 10.23 | |
| 796. |
Which is not a valid Java variable |
| A. | lot |
| B. | c 1t |
| C. | s $ 2 |
| D. | 2 s $ |
| Answer» E. | |
| 797. |
If X = 2.5 and Y = 2.5, which of the following expressions would give the result as 5/7? |
| A. | X + 2.5 / Y + 3.0 |
| B. | (X + 2.5) / Y + 4.5 |
| C. | (X + 2.5) / (Y + 4.5) |
| D. | (X + 2.5) / Y + 3.5 |
| Answer» D. (X + 2.5) / Y + 3.5 | |
| 798. |
Which of the following is not a valid real variable in FORTRAN 77? |
| A. | ANUT |
| B. | MONEY |
| C. | A MONEY |
| D. | BS |
| Answer» C. A MONEY | |
| 799. |
Consider the following C program int ramfloat alpha, gammaram = 6400alpha = 0.562gamma = alpha * ram + 1Now consider the following statements about this program ram is an integer variablealpha, gamma are real variables*, + are arithmetic operators0.562 may be an integer constant or real constant Which of the above are correct? |
| A. | All |
| B. | 1, 2, 3 only |
| C. | 2, 3, 4 only |
| D. | 1, 2, 4 only |
| Answer» C. 2, 3, 4 only | |
| 800. |
Which of the following is a valid variable in FORTRAN 77? |
| A. | 0.125 |
| B. | ALPHA -3 |
| C. | ALPHA 3 |
| D. | BALPHAC |
| Answer» D. BALPHAC | |