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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 8

49 questions

Question 1

The refreshing rate of dynamic RAMs is approximately once in:

A.
Two microseconds
B.
Fifty milliseconds
C.
Two milliseconds
D.
Two seconds

Question 2

In comparison with static RAM memory, the dynamic RAM memory has:

A.
Lower bit density and higher power consumption
B.
Higher bit density and higher power consumption
C.
Lower bit density and lower power consumption
D.
Higher bit density and lower power consumption

Question 3

Disadvantage of dynamic RAM over static RAM is:

A.
Higher power consumption
B.
Variable speed
C.
Need to refresh the capacitor charge every once in two milliseconds
D.
Higher bit density

Question 4

The access time of magnetic bubble memory is approximately:

A.
30 nanoseconds
B.
30 milliseconds
C.
30 microseconds
D.
0.3 seconds

Question 5

Serial access memories are useful in applications where:

A.
Data consists of numbers
B.
Short access time is required
C.
Each stored word is processed differently
D.
Data naturally needs to flow in and out in serial form

Question 6

What is the main advantage of magnetic core memory over semiconductor RAM memory?

A.
More compact and smaller
B.
More economical
C.
A bit does not have to be written after reading
D.
Non-volatile

Question 7

Fastest types of memory from the following list is:

A.
Tape
B.
Disk
C.
Semiconductor
D.
Bubble memory

Question 8

The use of hardware in Memory management is through segment relocation and protection is:

A.
To perform address translation to reduce size of the memory
B.
To perform address translation to reduce execution time overhead
C.
Both A and B
D.
None of these

Question 9

Memory refreshing may be done:

A.
By the CPU that contains a spec regress counter, only
B.
By an external refresh counter, only
C.
Either by CPU or by an extern refresh counter
D.
None of the above

Question 10

Choose the correct statement from the following:

A.
PROM contains a programmable AND array and a fixed OR array
B.
PLA contains a fixed AND array and a programmable OR array
C.
PROM contains a fixed AND array and a programmable OR array
D.
None of the above

Question 11

Which of the following is not true of primary storage?

A.
It represents the decimal number through string of binary digits
B.
It stores operating system programs
C.
It stores data while they are being processed by CPU
D.
It stores the bulk of data used by computer application

Question 12

A dynamic RAM consists up:

A.
Six transistors
B.
One transistor and one capacitor
C.
Two transistors and two capacitors
D.
Two capacitors only

Question 13

Semiconductor memory is:

A.
Somewhat slower than magnetic core memory
B.
A volatile memory
C.
Somewhat longer than magnetic core memory
D.
All of the above

Question 14

Which of the following is the internal memory of the system (computer)?

A.
CPU registers
B.
Main memory
C.
Cache memory
D.
All of the above

Question 15

A software program stored in a ROM that cannot be changed easily is called:

A.
Hardware
B.
Editor
C.
Linker
D.
Firmware

Question 16

An advantage of memory interfacing is that:

A.
A large memory is obtained
B.
Effective speed of the memory is increased
C.
The cost of the memory is reduced
D.
A non-volatile memory is obtained

Question 17

In a virtual memory system, the address space specified by the address line of the CPU must be ______ than the physical memory size and ______ than the secondary storage size.

A.
Smaller, smaller
B.
Larger, smaller
C.
Smaller, larger
D.
Larger, larger

Question 18

Which of the following is /are advantage of virtual memory?

A.
Faster access to memory on a average
B.
Processes can be given protected address space
C.
Both A and B
D.
Program larger than the physical memory size can be run

Question 19

Which of the following need extra hardware for DRAM refreshing?

A.
8085
B.
Motorola 68000
C.
Both (A) and (B)
D.
None of the above

Question 20

Memory consisting of electronic circuit attached into silicon chip is known as:

A.
Magnetic core memory
B.
Thin film memory
C.
Semiconductor memory
D.
MOS memory

Question 21

Which of the following memory is capable of operating at electronic speed?

A.
Semiconductor memory
B.
Magnetic drums
C.
Magnetic disks
D.
Magnetic tapes

Question 22

The larger the RAM of a computer, the faster is its speed, since it eliminates

A.
Need of ROM
B.
Frequency disk I/O
C.
Need for external memory
D.
Need for a data-wide path

Question 23

What is the average access time for a drum rotating at 4000 revolution per minute?

A.
2.5 milli seconds
B.
7.5 milli seconds
C.
5.0 milli seconds
D.
4.0 milli seconds

Question 24

How many input lines are needed to construct 1024-bit coincident 'core plan?'

A.
10
B.
32
C.
16
D.
64

Question 25

What is the byte capacity of a drum which is 5-inch-high, 10-inch diameter, and which has 60 tracks per inch bit density of 800 bits per inch?

A.
942000 bytes
B.
188400 bytes
C.
471000 bytes
D.
16384 bytes

Question 26

The main advantage of multiple bus organization over single bus is,

A.
Reduction in the number of cycles for execution
B.
Increase in size of the registers
C.
Better Connectivity
D.
None of these

Question 27

Property of locality of reference may fail, if a program has

A.
Many conditional jumps
B.
Many operands
C.
Many unconditional jumps
D.
All of the above

Question 28

How many RAM chips of size (256x1 bit) are required to build 1M byte memory?

A.
8
B.
24
C.
10
D.
32

Question 29

If each address space represents one byte of storage space, how many address lines are needed to access RAM chips arranged in a 4x6 array, where each chip is 8K x 4 bits?

A.
13
B.
16
C.
15
D.
17

Question 30

Four memory chips of 16x4 size have their address bases connected together. The system will be of size

A.
64x64
B.
32x8
C.
16x16
D.
256x1

Question 31

Arrange the following configurations for CPU in decreasing order or operating speeds:

A.
Hard wired control, vertical micro-programming, horizontal micro-programming
B.
Hard wired control, horizontal micro-programming, vertical micro-programming
C.
Horizontal micro-programming, vertical micro-programming, hard wired control
D.
Vertical micro-programming, horizontal micro-programming, hard wired control

Question 32

The main difference (a) between a CISC and a RISC processor is/are that a RISC processor typically

A.
Has fewer instructions and addressing modes
B.
Has more registers
C.
Is easier to implements using hard-wired control logic
D.
All of the above

Question 33

Comparing the time T1 taken for a single instruction on a pipelined CPU with time T2 taken on a non-pipelined but identical CPU, we can say that

A.
T1=T2
B.
T1>T2
C.
T1\<T2
D.
T1 is T2 plus time taken for one instruction fetch cycle

Question 34

Performance of a pipelined processor suffers if

A.
The pipeline stages have different delays
B.
Consecutive instructions are dependent on each other
C.
The pipeline stages share hardware resources
D.
All of the above

Question 35

A micro-programmed control unit

A.
Is faster than a hard-wired control unit
B.
Facilitates easy implementation of new instruction
C.
Is useful when very small programs are to be run
D.
Usually refers to the control unit of a microprocessor

Question 36

Which of the following are typical characteristics of a RISC machine?

A.
Highly pipelined
B.
Multiple register sets
C.
Both (A) and (B)
D.
None of these

Question 37

In an 8085-microprocessor system with memory mapped I/O

A.
I/O device have 8-bit addresses
B.
I/O devices are accessed using IN and OUT instruction
C.
There can be a maximum of 256 input devices and 256 output devices
D.
Arithmetic and logic operations can be directly performed with the I/O data

Question 38

How many types of storage loops exist in magnetic bubble memory?

A.
8
B.
3
C.
4
D.
2

Question 39

How many wires are threaded through the cores in a coincident current core memory?

A.
2
B.
4
C.
3
D.
6

Question 40

When we move from the outermost track to the innermost track in a magnetic disk, then density (bits per liner inch)

A.
Increases
B.
Remains the same
C.
Decreases
D.
Either remains constant or decreases

Question 41

The use of hardware in Memory management is through segment relocation and protection is

A.
To perform address translation to reduce size of the memory
B.
To perform address translation to reduce execution time overhead
C.
Both A and B
D.
None of the above

Question 42

The parallel operation is preferred because

A.
Circuitry is simple
B.
It is faster than series operation
C.
It requires less memory
D.
All of the above

Question 43

In comparison to the internal (main) memory, tape or disk memory is

A.
Slower and more expensive
B.
Faster and more expensive
C.
Slower and less expensive
D.
Faster and less expensive

Question 44

The number of records contained within a block of data on magnetic tape is defined by the

A.
Block definition
B.
Blocking factor
C.
Record contain clause
D.
Record per block factor

Question 45

Transfer of information from main storage is typically n times faster than the transfer form auxiliary storage, where n is about

A.
5
B.
100
C.
10
D.
200

Question 46

Which access method is used for obtaining a record form a cassette tape?

A.
Direct
B.
Random
C.
Sequential
D.
Parallel

Question 47

An advantage of blocking a tape is that

A.
The additional processing time is consumed
B.
The direct file method can be emulated
C.
The tapes contains less data and longer tapes
D.
Less tape is used to store the same amount of data

Question 48

The ISA standard Buses are used to connect,

A.
RAM and processor
B.
Hard disk and Processor
C.
GPU and processor
D.
CD/DVD drives and Processor

Question 49

Which of the following is not true of primary storage?

A.
It represents the decimal number through string of binary digits.
B.
It stores operating system programs
C.
It stores data while they are being processed by CPU.
D.
It stores the bulk of data used by computer application

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