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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

Microprocessor Set 2

50 questions

Question 1

Which of the following is a characteristic of non-volatile memory?

A.
It requires power to retain its data
B.
It is faster than volatile memory
C.
It is used for temporary storage
D.
It retains data even when the power is turned off

2

What is the difference between random access memory (RAM) and read-only memory (ROM)?

A.
RAM is non-volatile, while ROM is volatile
B.
ROM is used for temporary storage, while RAM is used for permanent storage
C.
RAM is faster than ROM
D.
ROM retains its data even when the power is turned off, while RAM does not

Question 3

Which of the following is an example of volatile memory?

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

Question 4

What is the purpose of a memory address?

A.
To identify the type of data being stored
B.
To identify the location of the data being stored
C.
To prevent unauthorized access to the data
D.
To provide additional storage for the data

Question 5

Which of the following is an example of primary memory?

A.
Hard disk
B.
Cache memory
C.
CD-ROM
D.
RAM

Question 6

What is the purpose of a memory bus?

A.
To store data in the CPU cache
B.
To manage the transfer of data between main memory and the CPU
C.
To provide a backup of data in case of a system failure
D.
To prevent unauthorized access to data

Question 7

Which of the following is true about memory bandwidth?

A.
It is a measure of the amount of data that can be transferred between the CPU and memory in a given time
B.
It is a measure of the amount of storage capacity available in a given memory device
C.
It is a measure of the access time for a given memory device
D.
It is a measure of the number of memory devices that can be connected to a single bus

Question 8

Which of the following is an example of a secondary storage device?

A.
Hard disk
B.
RAM
C.
Cache memory
D.
Registers

Question 9

Which of the following is true about solid-state drives (SSDs)?

A.
They are faster than traditional hard disk drives (HDDs)
B.
They are less expensive than traditional HDDs
C.
They have a larger storage capacity than traditional HDDs
D.
They use spinning disks to store data

Question 10

Which type of external memory is typically used for long-term storage and backup?

A.
Magnetic tape
B.
SSD
C.
USB flash drive
D.
CD-ROM

Question 11

Which of the following is an important principle of cache design?

A.
Data should always be stored in the cache
B.
Only frequently used data should be stored in the cache
C.
Data should be stored in the cache in the order it is accessed
D.
Data should be stored in the cache based on its age

Question 12

What is the purpose of a cache line?

A.
To identify the location of data in the cache
B.
To identify the location of data in main memory
C.
To group multiple blocks of data into a single cache entry
D.
To manage the transfer of data between the CPU and cache

Question 13

What is cache hit rate?

A.
The percentage of cache accesses that result in a cache hit
B.
The percentage of cache accesses that result in a cache miss
C.
The time it takes to access data in the cache
D.
The time it takes to transfer data between main memory and the cache

Question 14

Which of the following is an example of a direct-mapped cache?

A.
Set-associative cache
B.
Fully-associative cache
C.
Virtually-addressed cache
D.
Physically-addressed cache

Question 15

What is the purpose of a cache replacement policy?

A.
To determine the size of the cache
B.
To determine the location of data in the cache
C.
To determine which cache entry to replace when the cache is full
D.
To determine which block of data to load into the cache

Question 16

Which of the following is a disadvantage of a fully-associative cache?

A.
It has a higher hit rate than other types of caches
B.
It is more expensive to implement
C.
It is more difficult to manage than other types of caches
D.
It has a larger cache size than other types of caches

Question 17

Which of the following is a disadvantage of a direct-mapped cache?

A.
It has a higher hit rate than other types of caches
B.
It is more expensive to implement than other types of caches
C.
It is more difficult to manage than other types of caches
D.
It can suffer from cache conflicts

Question 18

Which of the following is an example of a write-back cache?

A.
Write-through cache
B.
Victim cache
C.
No-write allocate cache
D.
Write-allocate cache

Question 19

What is the purpose of a victim cache?

A.
To store data that has been evicted from the cache
B.
To store data that is not frequently accessed
C.
To store data that has not yet been written to main memory
D.
To store data that has been modified in the cache

Question 20

Which of the following is an advantage of a set-associative cache?

A.
It has a higher hit rate than other types of caches
B.
It is less expensive to implement than other types of caches
C.
It is easier to manage than other types of caches
D.
It has a smaller cache size than other types of caches

Question 21

Which of the following is a type of primary memory?

A.
Hard Disk Drive
B.
Random Access Memory (RAM)
C.
Compact Disc (CD)
D.
Floppy Disk

Question 22

What is the main difference between primary and secondary memory?

A.
Primary memory is faster, but less storage capacity
B.
Secondary memory has a longer lifespan, but slower access time
C.
Primary memory is volatile, while secondary memory is non-volatile
D.
Secondary memory is more expensive, but more reliable

Question 23

Which of the following is a type of secondary memory?

A.
Cache
B.
Read-Only Memory (ROM)
C.
Magnetic Tape
D.
Graphics Processing Unit (GPU)

Question 24

What is the primary use of secondary memory?

A.
To store programs and data that are currently in use
B.
To provide long-term storage for data and programs
C.
To speed up the processing of data
D.
To display graphics on a computer screen

Question 25

What is the maximum storage capacity of a typical secondary memory device?

A.
A few gigabytes
B.
A few terabytes
C.
A few petabytes
D.
A few exabytes

Question 26

What is the main purpose of peripheral devices in a computer system?

A.
To provide a large amount of non-volatile storage for data and programs
B.
To speed up the processing of data
C.
To provide a way for users to interact with the computer
D.
To display graphics on a computer screen

Question 27

Which of the following is an example of an I/O module?

A.
Keyboard
B.
Processor
C.
Hard Disk Drive
D.
Graphics Processing Unit (GPU)

Question 28

What is the purpose of an input-output interface in a computer system?

A.
To manage data transfer between the CPU and the memory
B.
To manage input and output operations
C.
To manage the power supply to the memory
D.
To manage the storage and retrieval of data on a hard disk

Question 29

What is the purpose of Direct Memory Access (DMA)?

A.
To allow peripheral devices to directly access and transfer data to and from memory without involving the CPU
B.
To speed up the processing of data by temporarily storing frequently accessed data
C.
To provide a way for users to interact with the computer
D.
To manage the storage and retrieval of data on a hard disk

Question 30

What is a characteristic of a multiprocessor system?

A.
It has a single processor
B.
It has multiple processors that work independently of each other
C.
It has a single processor that is shared by multiple peripherals
D.
It has multiple processors that are tightly coupled and work together as a single entity

Question 31

What is the main purpose of inter-processor communication in a multiprocessor system?

A.
To coordinate the actions of multiple processors to ensure that they work together effectively
B.
To manage the power supply to the processors
C.
To manage the storage and retrieval of data on a hard disk
D.
To display graphics on a computer screen

Question 32

What is the main purpose of interconnection structure in a multiprocessor system?

A.
To provide a way for the processors to communicate with each other
B.
To manage the power supply to the processors
C.
To manage the storage and retrieval of data on a hard disk
D.
To display graphics on a computer screen

Question 33

What is the main purpose of synchronization in a multiprocessor system?

A.
To coordinate the actions of multiple processors to ensure that they work together effectively
B.
To manage the power supply to the processors
C.
To manage the storage and retrieval of data on a hard disk
D.
To display graphics on a computer screen

Question 34

What is the main difference between programmed I/O and Interrupt-driven I/O?

A.
Programmed I/O requires the CPU to actively monitor the status of the I/O operation, while Interrupt-driven I/O relies on the peripheral device to generate an interrupt to signal the completion of the I/O operation
B.
Interrupt-driven I/O requires the CPU to actively monitor the status of the I/O operation, while Programmed I/O relies on the peripheral device to generate an interrupt to signal the completion of the I/O operation
C.
Programmed I/O and Interrupt-driven I/O are the same thing
D.
Programmed I/O is faster, but less reliable, while Interrupt-driven I/O is slower, but more reliable

Question 35

What is the main purpose of VHDL?

A.
To provide a way to design and simulate digital circuits
B.
To provide a way to program microcontrollers
C.
To provide a way to create and edit text documents
D.
To provide a way to create and edit images

Question 36

How is overflow handled in VHDL?

A.
By default, VHDL does not handle overflow
B.
Overflow is handled automatically by VHDL
C.
Overflow is handled using specific VHDL constructs, such as overflow flags or saturation arithmetic
D.
Overflow is handled using error handling techniques, such as exceptions

Question 37

How is data representation performed in VHDL?

A.
By using binary or hexadecimal representation
B.
By using ASCII or Unicode representation
C.
By using standard data types, such as integers or floating-point numbers
D.
By using custom data types, such as arrays or records

Question 38

How can combinational logic be designed using VHDL?

A.
By using gates, such as AND, OR, and NOT gates
B.
By using the case or if-then-else statements
C.
By using state machines or finite state machines (FSMs)
D.
By using lookup tables or memory elements

Question 39

How can pipelining be performed using VHDL?

A.
By using pipelines, such as pipeline stages or pipeline registers
B.
By using parallel processing techniques, such as parallel execution or parallel threads
C.
By using state machines or finite state machines (FSMs)
D.
By using lookup tables or memory elements

Question 40

What is the main function of an operating system?

A.
To provide a user interface for interaction with the computer
B.
To provide a platform for running applications and managing computer hardware
C.
To provide a way to create and edit text documents
D.
To provide a way to play video games

Question 41

What is the difference between a task, process, and thread?

A.
A task is a single instance of a program, a process is a collection of tasks, and a thread is a single path of execution within a process
B.
A task is a collection of processes, a process is a single instance of a program, and a thread is a single path of execution within a process
C.
A task is a collection of threads, a process is a single path of execution within a task, and a thread is a single instance of a program
D.
A task is a single path of execution within a process, a process is a collection of tasks, and a thread is a single instance of a program

Question 42

What is the main difference between multiprocessing and multitasking?

A.
Multiprocessing refers to the use of multiple processors to run multiple tasks, while multitasking refers to the ability of an operating system to run multiple tasks simultaneously
B.
Multitasking refers to the use of multiple processors to run multiple tasks, while multiprocessing refers to the ability of an operating system to run multiple tasks simultaneously
C.
Multiprocessing and multitasking are the same thing
D.
Multiprocessing refers to the ability of an operating system to run multiple tasks simultaneously, while multitasking refers to the use of multiple processors to run multiple tasks

Question 43

What is the main purpose of task scheduling in an operating system?

A.
To determine which tasks should be run next and allocate resources accordingly
B.
To manage the storage and retrieval of data on a hard disk
C.
To manage the power supply to the computer
D.
To display graphics on a computer screen

Question 44

What is the main purpose of task synchronization in an operating system?

A.
To coordinate the actions of multiple tasks to ensure that they work together effectively
B.
To manage the storage and retrieval of data on a hard disk
C.
To manage the power supply to the computer
D.
To display graphics on a computer screen

Question 45

What is the main function of a device driver in an operating system?

A.
To provide a standard and consistent interface between the operating system and hardware devices
B.
To provide a secure interface between the operating system and hardware devices
C.
To provide a fast interface between the operating system and hardware devices
D.
To provide a user-friendly interface between the operating system and hardware devices

Question 46

What is the main difference between an open-loop and closed-loop control system?

A.
An open-loop control system does not use feedback to control the output, while a closed-loop control system uses feedback to control the output
B.
A closed-loop control system does not use feedback to control the output, while an open-loop control system uses feedback to control the output
C.
An open-loop control system is faster, but less accurate, while a closed-loop control system is slower, but more accurate
D.
An open-loop control system is slower, but more accurate, while a closed-loop control system is faster, but less accurate

Question 47

What is the main purpose of control in an operating system?

A.
To regulate the behavior of tasks and processes, and to manage the allocation of resources
B.
To manage the storage and retrieval of data on a hard disk
C.
To manage the power supply to the computer
D.
To display graphics on a computer screen

Question 48

What is virtual memory in an operating system?

A.
A feature that enables an operating system to run more applications than the available physical memory by temporarily transferring data to a hard disk
B.
A feature that enables an operating system to run more applications than the available physical memory by temporarily transferring data to a cloud storage
C.
A feature that enables an operating system to run more applications than the available physical memory by temporarily transferring data to a network storage

Question 49

What is the main goal of cache memory in a computer system?

A.
To reduce the access time for frequently accessed data
B.
To increase the access time for frequently accessed data
C.
To provide a low-cost memory for storing large amounts of data
D.
To provide a high-capacity memory for storing large amounts of data

Question 50

What is the main function of a control unit in a computer system?

A.
To control the flow of data and instructions in the computer system
B.
To store and retrieve data from memory
C.
To perform arithmetic and logical operations
D.
To display output on a screen

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