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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 4

45 questions

Question 1

The ______ bus controller device decodes the signals to produce the control bus signal.

A.
Internal
B.
External
C.
Data
D.
Address

Question 2

A ______ Instruction at the end of interrupt service program takes the execution back to the interrupted program.

A.
Forward
B.
Data
C.
Return
D.
Line

Question 3

The main concerns of the ______ are to define a flexible set of commands.

A.
Memory interface
B.
Both A and B
C.
Peripheral interface
D.
Control interface

Question 4

Primary function of memory interfacing is that they ______ should be able to read from and write into register.

A.
Multiprocessor
B.
Dual Processor
C.
Microprocessor
D.
Coprocessor

Question 5

To perform any operations, the MP should identify the ______.

A.
Register
B.
Interface
C.
Memory
D.
System

Question 6

The Microprocessor places ______ address on the address bus.

A.
4-bit
B.
16-bit
C.
8-bit
D.
32-bit

Question 7

The Microprocessor places 16-bit address on the add lines from that address by ______ register should be selected.

A.
Address
B.
Two
C.
One
D.
Three

Question 8

The ______ of the memory chip will identify and select the register for the EPROM.

A.
Internal decoder
B.
Address decoder
C.
External decoder
D.
Data decoder

Question 9

Microprocessor provides signal like ______ to indicate the read operation.

A.
LOW
B.
MCMR
C.
MCMW
D.
MCMWR

Question 10

To interface memory with the microprocessor, connect register the lines of the address bus must be added to address lines of the ______ chip.

A.
Single
B.
Multiple
C.
Memory
D.
Triple

Question 11

The remaining address line of ______ bus is decoded to generate chip select signal.

A.
Data
B.
Control bus
C.
Address
D.
Both A and B

Question 12

______ signal is generated by combining RD and WR signals with IO/M.

A.
Control
B.
Register
C.
Memory
D.
System

Question 13

Memory is an integral part of a ______ system.

A.
Supercomputer
B.
Minicomputer
C.
Microcomputer
D.
Mainframe computer

Question 14

______ has certain signal requirements write into and read from its registers.

A.
Memory
B.
Both A and B
C.
Register
D.
Control

Question 15

An ______ is used to fetch one address.

A.
Internal decoder
B.
Encoder
C.
External decoder
D.
Register

Question 16

The primary function of the ______ is to accept data from I/O devices.

A.
Multiprocessor
B.
Peripherals
C.
Microprocessor
D.
Interfaces

Question 17

______ signal prevents the microprocessor from reading the same data more than once.

A.
Pipelining
B.
Controlling
C.
Handshaking
D.
Signaling

Question 18

Bits in IRR interrupt are ______.

A.
Reset
B.
Stop
C.
Set
D.
Start

Question 19

______ generate interrupt signal to microprocessor and receive acknowledge.

A.
Priority resolver
B.
Interrupt request register
C.
Control logic
D.
Interrupt register

Question 20

The ______ pin is used to select direct command word.

A.
A0
B.
A12
C.
D7-D6
D.
AD7-AD6

Question 21

The ______ is used to connect more microprocessors.

A.
Peripheral device
B.
I/O devices
C.
Cascade
D.
Control unit

Question 22

CS connects the output of ______.

A.
Encoder
B.
Slave program
C.
Decoder
D.
Buffer

Question 23

In which year, 8086 was introduced?

A.
1978
B.
1977
C.
1979
D.
1981

Question 24

Expansion for HMOS technology ______.

A.
High level mode oxygen semiconductor
B.
High level metal oxygen semiconductor
C.
High performance medium oxide semiconductor
D.
High performance metal oxide semiconductor

Question 25

8086 and 8088 contain ______ transistors.

A.
29000
B.
34000
C.
24000
D.
54000

Question 26

ALE stands for ______.

A.
Address latch enable
B.
Address leak enable
C.
Address level enable
D.
Address leak extension

Question 27

What is DEN?

A.
Direct enable
B.
Data enable
C.
Data entered
D.
Data encoding

Question 28

In 8086, Example for Non-maskable interrupts are ______.

A.
TRAP
B.
INTR
C.
RST6.5
D.
RST6.6

Question 29

In 8086 the overflow flag is set when ______.

A.
The sum is more than 16 bits.
B.
Signed numbers go out of their range after an arithmetic operation.
C.
Carry and sign flags are set.
D.
Subtraction

Question 30

In 8086 microprocessor one of the following statements is not true?

A.
Coprocessor is interfaced in max mode.
B.
Coprocessor is interfaced in min mode.
C.
I/O can be interfaced in max/min mode.
D.
Supports pipelining

Question 31

Address line for TRAP is?

A.
0023H
B.
0033H
C.
0024H
D.
0099H

Question 32

Access time is faster for ______.

A.
ROM
B.
DRAM
C.
SRAM
D.
ERAM

Question 33

The First Microprocessor was ______.

A.
Intel 4004
B.
8085
C.
8080
D.
4008

Question 34

Status register is also called as ______.

A.
Accumulator
B.
Counter
C.
Stack
D.
Flags

Question 35

Which of the following is not a basic element within the microprocessor?

A.
Microcontroller
B.
Register array
C.
Arithmetic logic unit (ALU)
D.
Control unit

Question 36

Which method bypasses the CPU for certain types of data transfer?

A.
Software interrupts
B.
Polled I/O
C.
Interrupt-driven I/O
D.
Direct memory access (DMA)

Question 37

Which bus is bidirectional?

A.
Address bus
B.
Data bus
C.
Control bus
D.
None of the above

Question 38

The first microprocessor has a (n) ______.

A.
1-bit data bus
B.
4-bit data bus
C.
2-bit data bus
D.
8-bit data bus

Question 39

Which microprocessor has multiplexed data and address lines?

A.
8086
B.
80386
C.
80286
D.
Pentium

Question 40

Which is not an operand?

A.
Variable
B.
Memory location
C.
Register
D.
Assembler

Question 41

Which is not part of the execution unit (EU)?

A.
Arithmetic logic unit (ALU)
B.
General registers
C.
Clock
D.
Flags

Question 42

'A 20-bit address bus can locate ______'.

A.
1,048,576 locations
B.
4,194,304 locations
C.
2,097,152 locations
D.
8,388,608 locations

Question 43

Which of the following is not an arithmetic instruction?

A.
INC (increment)
B.
DEC (decrement)
C.
CMP (compare)
D.
ROL (rotate left)

Question 44

During a read operation the CPU fetches ______.

A.
A program instruction
B.
Data itself
C.
Another address
D.
All of the above

Question 45

Which of the following is not an 8086/8088 general-purpose register?

A.
Code segment (CS)
B.
Stack segment (SS)
C.
Data segment (DS)
D.
Address segment (AS)

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