PrakashNotes

1 Which of the following is a valid Boolean expression for an OR gate?

A⋅B A+B A−B A÷B

2 What is the correct binary representation of the decimal number 45?

101101 110101 111001 100111

3 What is the output of a NAND gate when both inputs are 1?

0 1 Undefined 10

4 Which of the following is a valid Sum-of-Products (SOP) expression?

A+B⋅C A⋅B+C A⋅(B+C) A+(B⋅C)

5 Which Boolean expression represents the product-of-sums (POS) form of the function A⋅B+C?

(A+B)⋅(A+C) (A⋅B)+C (A+C)⋅(B+C) (A⋅C)+(B⋅C)

6 A 4-to-1 multiplexer has how many data input lines?

4 8 16 32

7 Which circuit is used to select one of many inputs based on a binary control signal?

Multiplexer Decoder Encoder Demultiplexer

8 In binary addition, what is the sum of 1 + 1?

0 1 2 10

9 Which of the following is an example of a combinational circuit?

Flip-Flop RS Flip-Flop Adder Counter

10 What is the two’s complement of the binary number 1011?

101 1100 100 1001

11 Which gate is represented by the Boolean expression A+B?

AND OR NAND NOR

12 Which type of flip-flop is edge-triggered?

D Flip-Flop SR Flip-Flop JK Flip-Flop T Flip-Flop

13 How many flip-flops are required to construct a 4-bit register?

1 2 3 4

14 Which of the following is an example of an arithmetic circuit?

Encoder Decoder Adder Multiplexer

15 Which of the following is a valid Karnaugh map?

A 4x4 grid A 2x2 grid A 3x3 grid A 5x5 grid

16 What is the output of a NOR gate when both inputs are 0?

1 0 Undefined 10

17 What is the function of a Demultiplexer?

To combine multiple inputs into one output To distribute one input to multiple outputs To convert parallel signals to serial signals To convert serial signals to parallel signals

18 Which of the following is used to subtract binary numbers?

Adder Subtractor Full Adder Half Adder

19 The complement of a binary number 1010 is

1011 101 1100 100

20 How many states does a 3-bit binary counter have?

2 4 6 8

21 Which of the following is an example of a sequential circuit?

Multiplexer Adder Flip-Flop Decoder

22 Which microprocessor instruction type requires no operand?

Data transfer Arithmetic operation Logical operation Control operation

23 In a microprocessor, what does the control unit do?

Executes instructions Manages data flow Performs arithmetic calculations Directs operations of the processor

24 Which of the following is a characteristic of a microprocessor?

It controls the input devices It handles input/output operations It processes data and executes instructions It stores data permanently

25 Which of the following is a classification of memory devices in a microprocessor system?

RAM I/O devices External hard drives All of the above

26 Which of the following is a type of memory hierarchy?

Cache memory Secondary memory Volatile memory Both A and B

27 What does DMA stand for?

Direct Memory Addressing Direct Memory Access Direct Memory Assignment Data Management Access

28 Which of the following is used in serial communication?

UART I2C SPI All of the above

29 What is the primary purpose of the interrupt service routine (ISR)?

To process an interrupt To enable interrupts To disable interrupts To provide an output response

30 In microprocessor systems, what is an I/O port used for?

Storing data Transmitting data to peripherals Performing arithmetic operations Executing instructions

31 Which microprocessor component manages the transfer of data between the CPU and memory?

Control unit ALU Register Bus

32 Which of the following is a feature of a synchronous transmission?

Data is sent one bit at a time Data is sent in the form of packets Data is synchronized with a clock Data is sent in parallel

33 Which of the following is used to handle interrupts in a microprocessor?

Interrupt Service Routine Control Unit ALU Data Bus

34 What is the primary function of a microprocessor's ALU?

Arithmetic and logical operations Data transfer Managing memory Executing control instructions

35 Which of the following is used to interface external devices with a microprocessor?

Memory management unit I/O ports ALU Clock generator

36 What type of microprocessor instruction manipulates memory addresses?

Data transfer instruction Arithmetic instruction Logical instruction Control instruction

37 In microprocessor systems, what does the bus do?

Stores data Transmits data between components Performs logical operations Manages interrupts

38 Which of the following is an example of a direct memory access (DMA) operation?

Reading data from a file Transferring data between memory and I/O without CPU intervention Fetching an instruction from memory Executing an arithmetic operation

39 Which of the following gates is represented by the Boolean expression A⋅B?

AND OR NAND NOR

40 What does a shift register do?

Adds binary numbers Shifts data in a binary sequence Stores data permanently Converts binary data to decimal

41 Which of the following is the most significant bit in an 8-bit signed binary number?

The least significant bit The 5th bit The 8th bit The first bit on the left

42 Which of the following is true about the RS flip-flop?

It is edge-triggered It has two stable states It has one input It operates as a clocked flip-flop

43 What is the primary use of a demultiplexer in a digital system?

To combine multiple inputs into a single output To split a single input into multiple outputs To transfer data between devices To convert serial data to parallel

44 Which of the following is a characteristic of a microprocessor’s instruction set?

It determines the operations the processor can perform It directly controls the I/O devices It is fixed and cannot be changed It is unrelated to the processor’s architecture

45 How many flip-flops are required to construct a 3-bit binary counter?

1 2 3 4

46 Which of the following memory types is non-volatile?

RAM ROM Cache Registers

47 Which of the following is true about a microprocessor’s ALU?

It performs only addition It performs arithmetic and logic operations It handles all memory operations It communicates with external devices

48 In which of the following situations would a microprocessor interrupt be triggered?

When data is written to a register When a memory access is requested When a specific condition is met in the system When the clock signal changes

49 What is the primary purpose of the clock in a microprocessor system?

To provide power to the system To synchronize the operations of the microprocessor To manage interrupts To transfer data

50 What is the result of a binary subtraction of 1101 - 1010?

11 101 1111 1001

51 Which of the following is used in a microprocessor system to temporarily store data and instructions?

Memory Register Control Unit Bus

52 Which of the following circuits is used to store one bit of data?

Adder Flip-Flop Decoder Encoder

53 What is the maximum number of outputs for a 3-to-8 decoder?

4 8 16 32

54 Which of the following is an example of a memory hierarchy in a computer system?

Cache memory, main memory, and secondary storage Registers, ALU, and I/O ports Control unit, buses, and interrupts Cache memory, CPU, and I/O ports

55 Which of the following is the main feature of the synchronous serial communication protocol?

Data transmission occurs one bit at a time Data is transmitted with a clock signal Data is transmitted in parallel Data transmission is asynchronous

56 What is the primary purpose of the control unit in a microprocessor?

To store data To perform arithmetic calculations To fetch and decode instructions To manage I/O operations

57 Which of the following is true about the 8085 microprocessor?

It is a 16-bit microprocessor It has 16-bit registers It supports 8-bit data bus It uses 32-bit address bus

58 What is the function of an encoder in digital circuits?

To convert parallel inputs into a binary code To decode binary data into a readable format To perform arithmetic operations To convert serial data into parallel

59 Which of the following is used to handle interrupts in a microprocessor?

Interrupt Service Routine Control Unit ALU Data Bus

60 What is the primary function of a microprocessor's ALU?

Arithmetic and logical operations Data transfer Managing memory Executing control instructions

61 Which of the following is used to interface external devices with a microprocessor?

Memory management unit I/O ports ALU Clock generator

62 What type of microprocessor instruction manipulates memory addresses?

Data transfer instruction Arithmetic instruction Logical instruction Control instruction

63 In microprocessor systems, what does the bus do?

Stores data Transmits data between components Performs logical operations Manages interrupts

64 Which of the following is an example of a direct memory access (DMA) operation?

Reading data from a file Transferring data between memory and I/O without CPU intervention Fetching an instruction from memory Executing an arithmetic operation

65 Which of the following gates is represented by the Boolean expression A⋅B?

AND OR NAND NOR

66 What does a shift register do?

Adds binary numbers Shifts data in a binary sequence Stores data permanently Converts binary data to decimal

67 Which of the following is the most significant bit in an 8-bit signed binary number?

The least significant bit The 5th bit The 8th bit The first bit on the left

68 Which of the following is true about the RS flip-flop?

It is edge-triggered It has two stable states It has one input It operates as a clocked flip-flop

69 What is the primary use of a demultiplexer in a digital system?

To combine multiple inputs into a single output To split a single input into multiple outputs To transfer data between devices To convert serial data to parallel

70 Which of the following is a characteristic of a microprocessor’s instruction set?

It determines the operations the processor can perform It directly controls the I/O devices It is fixed and cannot be changed It is unrelated to the processor’s architecture

71 How many flip-flops are required to construct a 3-bit binary counter?

1 2 3 4

72 Which of the following memory types is non-volatile?

RAM ROM Cache Registers

73 Which of the following is true about a microprocessor’s ALU?

It performs only addition It performs arithmetic and logic operations It handles all memory operations It communicates with external devices

74 In which of the following situations would a microprocessor interrupt be triggered?

When data is written to a register When a memory access is requested When a specific condition is met in the system When the clock signal changes

75 What is the primary purpose of the clock in a microprocessor system?

To provide power to the system To synchronize the operations of the microprocessor To manage interrupts To transfer data

76 What is the result of a binary subtraction of 1101 - 1010?

11 101 1111 1001

77 Which of the following is used in a microprocessor system to temporarily store data and instructions?

Memory Register Control Unit Bus

78 Which of the following circuits is used to store one bit of data?

Adder Flip-Flop Decoder Encoder

79 What is the maximum number of outputs for a 3-to-8 decoder?

4 8 16 32

80 Which of the following is an example of a memory hierarchy in a computer system?

Cache memory, main memory, and secondary storage Registers, ALU, and I/O ports Control unit, buses, and interrupts Cache memory, CPU, and I/O ports

81 Which of the following is the main feature of the synchronous serial communication protocol?

Data transmission occurs one bit at a time Data is transmitted with a clock signal Data is transmitted in parallel Data transmission is asynchronous

82 What is the primary purpose of the control unit in a microprocessor?

To store data To perform arithmetic calculations To fetch and decode instructions To manage I/O operations

83 Which of the following is true about the 8085 microprocessor?

It is a 16-bit microprocessor It has 16-bit registers It supports 8-bit data bus It uses 32-bit address bus

84 What is the function of an encoder in digital circuits?

To convert parallel inputs into a binary code To decode binary data into a readable format To perform arithmetic operations To convert serial data into parallel

85 What is the basic function of a decoder in digital circuits?

To convert binary data into readable information To perform logical operations To encode binary input into a code To convert binary data into a set of outputs based on the input

86 In binary subtraction, what is the result of 10102−01112?

00112 00102 01012 10012

87 Which of the following is true for a binary adder?

It adds two binary numbers and produces a sum and carry It performs multiplication of binary numbers It converts binary data into decimal format It shifts binary numbers left or right

88 What is the typical number of states in a 4-bit binary counter?

4 8 16 32

89 What does the term "overflow" mean in binary arithmetic?

The result exceeds the maximum value that can be represented The result is negative The result is stored in cache The result is shifted left

90 What is the main feature of an SR flip-flop?

It has no reset input It has one output It has two stable states It is edge-triggered

91 Which type of microprocessor is used in modern computing systems?

8-bit processors 16-bit processors 32-bit processors 64-bit processors

92 Which of the following is the result of the binary addition 11012+01102?

101012 101102 100002 101002

93 Which of the following is true about an asynchronous counter?

It operates with a clock signal Its outputs change with each clock pulse It uses a fixed clock cycle Its states change independently

94 What is the primary function of an I/O interface in a microprocessor system?

To manage memory operations To execute instructions To manage data transfer between the microprocessor and external devices To perform logical operations

95 In microprocessor systems, what is the purpose of a status register?

To store data temporarily To hold the address of the instruction to be executed To hold flags indicating the result of the last operation To store the program counter

96 Which of the following is true about the 8086 microprocessor?

It has a 16-bit data bus It is a 16-bit processor with a 32-bit address bus It is an 8-bit processor It has a 64-bit data bus

97 Which of the following components of a microprocessor performs arithmetic and logical operations?

Control Unit ALU Register Bus

98 What is the function of a parity bit in digital communications?

To detect errors in the data To store additional data To convert data into binary format To synchronize data transmission

99 Which of the following is an example of a combinational logic circuit?

Counter Shift register Decoder SR flip-flop

100 In which of the following is a shift register used?

Memory address generation Data transfer Data storage Performing logic operations

101 What is the purpose of an accumulator in a microprocessor?

To store intermediate results of arithmetic operations To store instructions To store data from external devices To store flags

102 Which of the following is a characteristic of a microprocessor's instruction set?

It is fixed and unchangeable It determines what operations the processor can perform It controls external devices It stores program data

103 In binary multiplication, what is the result of 1012×112?

10012 10112 11112 11012

104 What is the function of a master-slave flip-flop in digital circuits?

To store data To synchronize two flip-flops and control state changes To perform logic operations To add two binary numbers

105 Which of the following is used to calculate the output of an encoder?

It converts binary inputs into a corresponding output code It performs a shift operation It adds binary numbers It stores data temporarily

106 What does the term "bitwise operation" refer to in microprocessor systems?

Performing operations on individual bits of a number Performing arithmetic operations on numbers Storing data in memory Transferring data between devices

107 What is the purpose of a register in a microprocessor?

To store data temporarily To perform calculations To store instructions permanently To manage input/output operations

108 Which of the following is true about a synchronous counter?

Its outputs change independently of the clock It operates with a fixed clock pulse It changes states asynchronously It does not require a clock signal

109 Which of the following is the main advantage of using a 16-bit microprocessor over an 8-bit one?

It can process more data per clock cycle It is more energy-efficient It supports more I/O devices It has faster memory access

110 What does the term "clock pulse" refer to in a microprocessor system?

A single unit of data transmission The signal used to synchronize the timing of operations The output generated by the ALU The amount of data transferred per second

111 Which of the following gates implements the Boolean expression A+B?

AND OR NOR NAND

112 What is the function of an interrupt in a microprocessor system?

To halt the execution of a program To pause the system for debugging To handle external events or requests during program execution To execute low-level instructions

113 Which of the following is the result of the binary addition 11102+1012?

110112 100112 101112 110012

114 Which of the following components is responsible for fetching instructions in a microprocessor?

ALU Control Unit Register Memory

115 What is the maximum addressable memory in a 16-bit microprocessor?

64 KB 128 KB 256 KB 65536 KB

116 In a microprocessor, what is the purpose of the stack pointer?

To point to the current instruction To manage memory addresses for data storage To point to the top of the stack in memory To control input/output operations

117 What is the function of a multiplexer in digital circuits?

To combine multiple inputs into a single output To split a single input into multiple outputs To store binary data temporarily To add two binary numbers

118 Which of the following is true for a D flip-flop?

It has two inputs and one output It changes state based on the clock signal It only stores one bit of information All of the above

119 What is the function of a program counter in a microprocessor?

To store instructions To keep track of the memory address of the next instruction to be executed To manage memory access To perform arithmetic operations

120 Which of the following is a feature of a ROM (Read-Only Memory) chip?

It can be rewritten easily It is volatile It stores data permanently It stores data temporarily

121 What is the purpose of a control bus in a microprocessor system?

To store data To manage memory operations To transfer data between external devices and the processor To send control signals to other components

122 Which type of flip-flop is used in a register for storing multiple bits?

SR Flip-Flop D Flip-Flop T Flip-Flop JK Flip-Flop

123 In a microprocessor system, what does the ALU perform?

Data transfer Arithmetic and logical operations Memory management Program execution

124 What is the outcome of the binary subtraction 11012−10112?

00102 00002 11102 01002

125 What is the main purpose of using a 4-to-16 line decoder in digital circuits?

To reduce the number of inputs To convert a 4-bit input into a corresponding 16-bit output To add two binary numbers To store multiple bits of data

126 Which of the following is true about an encoder?

It converts binary data to readable text It converts parallel data into a binary code It shifts data left or right It performs binary addition

127 Which of the following is used to synchronize data transfer between two devices in a microprocessor system?

Buffer Clock Register ALU

128 What is the primary function of a microprocessor's control unit?

To execute arithmetic operations To control data flow between components To store instructions To manage memory and input/output operations

129 Which of the following is true about a JK flip-flop?

It has two inputs, J and K, and changes state based on clock pulses It only stores one bit of information It is not edge-triggered It requires an external clock to operate

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2.Digital Logic, Combinational & Sequential Circuits, and Microprocessor Systems (AExE02)

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