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Syllabus

NEC Electronics · Practice

Chapters & sets

1. Basic Electrical and Electronics Engineering

Basic Electrical

Set 1106

Basic Electronics

Set 171 Set 233

2. Digital Logic and Microprocessor

Digital Logic

Set 150 Set 250 Set 350 Set 450 Set 550 Set 650 Set 749 Set 851 Set 950 Set 1050 Set 1150 Set 1232

Microprocessor

Set 150 Set 250 Set 350 Set 445 Set 550 Set 650 Set 720 Set 850 Set 969

3. Programming Language and Its Applications

Mixed chapter MCQs

Set 150 Set 249 Set 349 Set 451 Set 540

4. Computer Organization and Embedded Systems

Mixed chapter MCQs

Set 150 Set 249 Set 350 Set 450 Set 550 Set 650 Set 750 Set 849 Set 950 Set 1050 Set 1150

5. Computer Networks and Network Security

Basic Networking

Set 150 Set 253

Advanced Networking

Set 150 Set 250 Set 350 Set 450 Set 550 Set 655

10. Project Planning, Design and Implementation

Mixed chapter MCQs Set 6

50 questions

Question 1

What is the purpose of an instruction register (IR) in a computer system?

A.
To hold the address of the next instruction to be executed.
B.
To hold the current instruction being executed.
C.
To hold the data being processed by the ALU.
D.
To hold the results of ALU operations.

2

What is a control unit in a computer system responsible for?

A.
Performing arithmetic and logical operations.
B.
Storing and retrieving data.
C.
Coordinating the activities of other computer components.
D.
Processing data into useful information.

Question 3

What type of computer organization uses a Harvard architecture?

A.
Von Neumann.
B.
Harvard.
C.
Princeton.
D.
RISC.

Question 4

What is the purpose of a cache in a computer system?

A.
To store frequently used data for quick access.
B.
To store data that is no longer needed.
C.
To store the results of arithmetic operations.
D.
To store the instructions being executed.

Question 5

What is an embedded system?

A.
A computer system designed for use in automobiles.
B.
A computer system designed for use in space missions.
C.
A computer system integrated into a device to perform specific tasks.
D.
A computer system designed for use in scientific experiments.

Question 6

What is the purpose of a microcontroller in an embedded system?

A.
To control the flow of data in the system.
B.
To perform arithmetic and logical operations.
C.
To coordinate the activities of other embedded system components.
D.
To process data into useful information.

Question 7

What is the difference between an embedded system and a general-purpose computer?

A.
An embedded system is designed for a specific task, while a general-purpose computer is not.
B.
A general-purpose computer has a larger memory than an embedded system.
C.
An embedded system has a faster processing speed than a general-purpose computer.
D.
A general-purpose computer has more input/output devices than an embedded system.

Question 8

What is the purpose of an interrupt in a computer system?

A.
To stop the current instruction from being executed.
B.
To start the execution of a new instruction.
C.
To store the results of arithmetic operations.
D.
To store the instructions being executed.

Question 9

What is the difference between a hard real-time system and a soft real-time system?

A.
A hard real-time system has more stringent timing requirements than a soft real-time system.
B.
A soft real-time system has more stringent timing requirements than a hard real-time system.
C.
A hard real-time system is used in embedded systems, while a soft real-time system is not.
D.
A soft real-time system is used in embedded systems, while a hard real-time system is not.

Question 10

What is the purpose of a timer in an embedded system?

A.
To measure the amount of time that has elapsed.
B.
To coordinate the activities of other embedded system components.
C.
To perform arithmetic and logical operations.
D.
To process data into useful information.

Question 11

What is the difference between a microprocessor and a microcontroller?

A.
A microprocessor is used in general-purpose computers, while a microcontroller is used in embedded systems.
B.
A microcontroller is used in general-purpose computers, while a microprocessor is used in embedded systems.
C.
A microprocessor has more processing power than a microcontroller.
D.
A microcontroller has more processing power than a microprocessor.

Question 12

What is the purpose of a watchdog timer in an embedded system?

A.
To monitor the performance of the system and reset it if necessary.
B.
To measure the amount of time that has elapsed.
C.
To coordinate the activities of other embedded system components.
D.
To process data into useful information.

Question 13

What is the purpose of an ADC (analog-to-digital converter) in an embedded system?

A.
To convert analog signals into digital signals for processing by the system.
B.
To convert digital signals into analog signals for output by the system.
C.
To store the results of arithmetic operations.
D.
To store the instructions being executed.

Question 14

What is the purpose of a DMA (direct memory access) controller in a computer system?

A.
To allow direct transfer of data between memory and I/O devices.
B.
To monitor the performance of the system and reset it if necessary.
C.
To convert analog signals into digital signals for processing by the system.
D.
To store the results of arithmetic operations.

Question 15

What is the purpose of a bus in a computer system?

A.
To provide a communication path between the different components of the system.
B.
To store the results of arithmetic operations.
C.
To store the instructions being executed.
D.
To monitor the performance of the system and reset it if necessary.

Question 16

What is the difference between a serial bus and a parallel bus?

A.
A serial bus transfers data one bit at a time, while a parallel bus transfers multiple bits at once.
B.
A parallel bus transfers data one bit at a time, while a serial bus transfers multiple bits at once.
C.
A serial bus is faster than a parallel bus.
D.
A parallel bus is faster than a serial bus.

Question 17

What is the purpose of a multiplexer (MUX) in a computer system?

A.
To select one of multiple input signals for output.
B.
To monitor the performance of the system and reset it if necessary.
C.
To store the results of arithmetic operations.
D.
To store the instructions being executed.

Question 18

What is the purpose of a demultiplexer (DEMUX) in a computer system?

A.
To distribute a single input signal to multiple outputs.
B.
To monitor the performance of the system and reset it if necessary.
C.
To store the results of arithmetic operations.
D.
To store the instructions being executed.

Question 19

What is the purpose of a decoder in a computer system?

A.
To translate binary code into a form that can be executed by the system.
B.
To monitor the performance of the system and reset it if necessary.
C.
To store the results of arithmetic operations.
D.
To store the instructions being executed.

Question 20

What is the purpose of a ROM (read-only memory) in a computer system?

A.
To store data that cannot be changed.
B.
To store data that can be changed.
C.
To store the results of arithmetic operations.
D.
To store the instructions being executed.

Question 21

What is the function of an Arithmetic and Logic Unit (ALU)?

A.
To perform arithmetic and logical operations on data.
B.
To store data.
C.
To process data into useful information.
D.
To coordinate the activities of other computer components.

Question 22

What is an instruction format in a computer system?

A.
The format in which instructions are stored in memory.
B.
The format in which data is stored in memory.
C.
The format in which results of arithmetic operations are stored in memory.
D.
The format in which addresses are stored in memory.

Question 23

What is an addressing mode in a computer system?

A.
The way in which memory addresses are generated to access data.
B.
The way in which data is stored in memory.
C.
The way in which results of arithmetic operations are stored in memory.
D.
The way in which instructions are stored in memory.

Question 24

What is the purpose of a data transfer instruction in a computer system?

A.
To transfer data from one location to another.
B.
To perform arithmetic and logical operations on data.
C.
To process data into useful information.
D.
To coordinate the activities of other computer components.

Question 25

What is the purpose of a data manipulation instruction in a computer system?

A.
To manipulate data in memory.
B.
To transfer data from one location to another.
C.
To perform arithmetic and logical operations on data.
D.
To process data into useful information.

Question 26

What is the difference between a load instruction and a store instruction in a computer system?

A.
A load instruction transfers data from memory to a register, while a store instruction transfers data from a register to memory.
B.
A store instruction transfers data from memory to a register, while a load instruction transfers data from a register to memory.
C.
A load instruction performs arithmetic operations on data, while a store instruction does not.
D.
A store instruction performs arithmetic operations on data, while a load instruction does not.

Question 27

What is an immediate addressing mode?

A.
The mode in which an immediate value is used as an operand.
B.
The mode in which a memory address is used as an operand.
C.
The mode in which a register is used as an operand.
D.
The mode in which a constant value is used as an operand.

Question 28

What is a register indirect addressing mode?

A.
The mode in which an immediate value is used as an operand.
B.
The mode in which a memory address is used as an operand.
C.
The mode in which a register is used to hold the memory address of the operand.
D.
The mode in which a constant value is used as an operand.

Question 29

What is a base relative addressing mode?

A.
The mode in which a register is used as a base address and an offset is added to access the operand.
B.
The mode in which a memory address is used as a base address and an immediate value is added to access the operand.
C.
The mode in which a register is used as a base address and another register is used as an offset to access the operand.
D.
The mode in which an immediate value is used as a base address and another register is used as an offset to access the operand.

Question 30

What is an indexed addressing mode?

A.
The mode in which a register is used as an index to access the operand in memory.
B.
The mode in which a memory address is used as an index to access the operand in memory.
C.
The mode in which an immediate value is used as an index to access the operand in memory.
D.
The mode in which a constant value is used as an index to access the operand in memory.

Question 31

What is a stack addressing mode?

A.
The mode in which data is stored and retrieved from a stack in memory.
B.
The mode in which data is stored and retrieved from a queue in memory.
C.
The mode in which data is stored and retrieved from a linked list in memory.
D.
The mode in which data is stored and retrieved from a tree in memory.

Question 32

What is the purpose of a rotate instruction in a computer system?

A.
To rotate the bits of a data value to the left or right.
B.
To perform arithmetic and logical operations on data.
C.
To transfer data from one location to another.
D.
To process data into useful information.

Question 33

What is the purpose of a shift instruction in a computer system?

A.
To shift the bits of a data value to the left or right.
B.
To perform arithmetic and logical operations on data.
C.
To transfer data from one location to another.
D.
To process data into useful information.

Question 34

What is the purpose of a compare instruction in a computer system?

A.
To compare two values and set flags accordingly.
B.
To perform arithmetic and logical operations on data.
C.
To transfer data from one location to another.
D.
To process data into useful information.

Question 35

What is the purpose of a branch instruction in a computer system?

A.
To change the flow of execution to a different instruction.
B.
To perform arithmetic and logical operations on data.
C.
To transfer data from one location to another.
D.
To process data into useful information.

Question 36

What is the purpose of a jump instruction in a computer system?

A.
To change the flow of execution to a different instruction.
B.
To perform arithmetic and logical operations on data.
C.
To transfer data from one location to another.
D.
To process data into useful information.

Question 37

What is the purpose of a call instruction in a computer system?

A.
To call a subroutine and save the return address.
B.
To perform arithmetic and logical operations on data.
C.
To transfer data from one location to another.
D.
To process data into useful information.

Question 38

What is the purpose of a return instruction in a computer system?

A.
To return from a subroutine to the instruction after the call.
B.
To perform arithmetic and logical operations on data.
C.
To transfer data from one location to another.
D.
To process data into useful information.

Question 39

What is the purpose of a load effective address (LEA) instruction in a computer system?

A.
To compute the effective address of an operand and store it in a register.
B.
To perform arithmetic and logical operations on data.
C.
To transfer data from one location to another.
D.
To process data into useful information.

Question 40

What is the purpose of a clear instruction in a computer system?

A.
To clear the contents of a register or memory location.
B.
To perform arithmetic and logical operations on data.
C.
To transfer data from one location to another.
D.
To process data into useful information.

Question 41

What is the purpose of a memory hierarchy?

A.
To ensure that data is stored in a single location for easy retrieval.
B.
To provide a range of storage options to balance speed and cost.
C.
To limit the amount of data that can be stored at any one time.
D.
To prevent unauthorized access to data.

Question 42

Which of the following is an example of internal memory?

A.
Hard disk.
B.
CD-ROM.
C.
RAM.
D.
USB flash drive.

Question 43

Which of the following is an example of external memory?

A.
Cache memory.
B.
Magnetic tape.
C.
Registers.
D.
Virtual memory.

Question 44

What is the purpose of cache memory?

A.
To provide additional storage for the operating system.
B.
To store frequently accessed data for faster access.
C.
To protect data from unauthorized access.
D.
To provide backup storage in case of a system failure.

Question 45

Which of the following is true about cache memory?

A.
It is larger in size than RAM.
B.
It is slower than main memory.
C.
It is located closer to the CPU than main memory.
D.
It has a longer access time than main memory.

Question 46

Which type of cache memory is integrated into the CPU?

A.
Level 1 (L1) cache.
B.
Level 2 (L2) cache.
C.
Level 3 (L3) cache.
D.
Virtual cache.

Question 47

Which type of cache memory is the largest in size?

A.
Level 1 (L1) cache.
B.
Level 2 (L2) cache.
C.
Level 3 (L3) cache.
D.
Virtual cache.

Question 48

Which type of memory is used to provide a bridge between main memory and secondary storage devices?

A.
Virtual memory.
B.
Cache memory.
C.
Flash memory.
D.
Magnetic memory.

Question 49

Which of the following is an advantage of using virtual memory?

A.
It reduces the amount of main memory required.
B.
It improves the access time of data.
C.
It allows multiple programs to run simultaneously.
D.
It provides faster data transfer rates.

Question 50

In a multi-processor configuration, two processor are connected to the host 8086 processor. The two-co-processor instruction set:

A.
Must be the same
B.
Must be disjoint
C.
May overlap
D.
Must be the same as that of the host

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