Microprocessors And Microcontrollers — Part 1 MCQs with Explanations

In the given options, the circuit that involves storage is the RS Latch (Reset-Set Latch). An RS Latch is a basic bistable digital circuit with two stable states that can store a single bit of data. It is commonly used in digital electronics for memory and storage applications. Here's a brief explanation of the options: RS Latch (Option A): As mentioned earlier, it is a fundamental storage element. It has two inputs: the Set (S) input and the Reset (R) input, and two outputs: Q and Q' (complement of Q). It can hold one bit of information. Mux (Option B - Multiplexer): A multiplexer is used to select one of many inputs and route it to a single output. While it can be used to transfer data, it is not primarily designed for storage. Nand (Option C - NAND gate): A NAND gate is a basic logic gate that performs logical conjunction (AND) followed by logical negation (NOT). It is used for various logic operations but is not a storage device. Decoder (Option D): A decoder is used to convert a binary code into a set of output lines. It doesn't store data but is used for addressing and control purposes. So, the correct answer is Option A: RS Latch , which is a circuit involving storage of a single bit of data.

-0 is the correct answer to “In one’s complement 8 bit representation 11111111 represents”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Circuit A has more gates than circuit B is the correct answer to “Circuit A is a 1-bit adder; circuit B is a 1 bit multiplier. [Hint: Construct the truth table for the adder and the multiplier]”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

True is the correct answer to “An e-mail message can be sent to many recipients.”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

The same as is the correct answer to “For the number A[15:0] = 0110110010001111, A[14:13] is ______ A[3:2].”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Z, CY, S, P and AC is the correct answer to “The five flags in 8085 are designated as”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

11 decimal places is the correct answer to “A 37 bit mantissa has an accuracy of”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Forces the assembler to reserve a specified number of consecutive bytes in the memory is the correct answer to “DS directive in 8085”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

BYTE is the correct answer to “Because we wish to allow each ASCII code to occupy one location in memory, most memories are __________ addressable.”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Set of {AND,OR,NOT} is the correct answer to “We say that a set of gates is logically complete if we can build any circuit without using any other kind of gates. Which of the following sets are logically complete”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Arithmetic, relational, assignment is the correct answer to “In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

one million is the correct answer to “In 8086 the number of bytes which can be addressed directly is about”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

False is the correct answer to “In a computer the data transfer between hard disk and CPU is nearly the same as that between diskette and CPU.”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

A pair of cross coupled NAND is the correct answer to “Which of the following pair of gates can form a latch”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

A is wrong R is correct is the correct answer to “Assertion (A): Each memory chip has its own address latch. Reason (R): ALE signal comes out of microprocessor 8085 and goes to memory chip.”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Can not change is the correct answer to “When the write enable input is not asserted, the gated D latch _________ its output.”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Cannot be determined is the correct answer to “For a memory with a 16-bit address space, the addressability is”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

127 is the correct answer to “Which of the following is a valid integer constant”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Option "P flag is set when the result has even parity" is the correct answer for this question under Microprocessors And Microcontrollers.

Implicit is the correct answer to “In 8085 which addressing mode is also called inherent addressing”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

True is the correct answer to “Internet is a worldwide network of computers where most of the information is freely available.”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Integer part, fraction part along with positive or negative sign is the correct answer to “A real number consists of”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

NAND-NAND is the correct answer to “Using DeMorgan’s Theorem we can convert any AND-OR structure into”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

A larger floating point number is the correct answer to “If the sign bit of mantissa is 0 and the exponent is increased from a positive to a more negative number the result is”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Mode 0, mode 1 and mode 2 is the correct answer to “The operating modes of 8255 A are called”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Reserved words is the correct answer to “In C the keywords are also called”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Logical IF, block IF and arithmetic IF is the correct answer to “The forms of IF statements in FORTRAN 77 are called”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

R is asserted, S is asserted is the correct answer to “Which of the following conditions is not allowed in an RS latch”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

log2 (m) is the correct answer to “If m is a power of 2, the number of select lines required for an m-input mux is:”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Either A or B is the correct answer to “The timing difference between a slow memory and fast processor can be resolved if”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

EEPROM is the correct answer to “Which memory has read operation, byte erase, byte write and chip erase”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

False is the correct answer to “The character set of Fortran 77 includes lower case alphabets a to z.”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Register is the correct answer to “A structure that stores a number of bits taken “together as a unit” is a”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

1, 2, 3, 4 is the correct answer to “Each instruction in assembly language program has the following fields: 1. Lable field 2. Mnemonic field 3. Operand field 4. Comment field The correct sequence of these fields is”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

int bar is the correct answer to “Which of the following is type declaration statement in C”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Halves is the correct answer to “If the number of address bits in a memory is reduced by 2 and the addressability is doubled, the size of the memory (i.e., the number of bits stored in the memory)”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

5 is the correct answer to “The number of interrupt lines in 8085 is”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

Both A and R are correct but R is not correct explanation of A is the correct answer to “Assertion (A): Negative values of incremental operator in DO loop are allowed in Fortran 77 but not in earlier versions of Fortran. Reason (R): Fortran 77 has better array facilities than earlier versions of Fortran.”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

6 is the correct answer to “The minimum number of transistors required to implement a two input AND gate is”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.

234 is the correct answer to “Which of the following is not treated as hexadecimal constant by assembler in 8085”. This question is standard in competitive examination syllabi for Microprocessors And Microcontrollers.