MCQs in Computer Fundamentals Part V

This is the Multiples Choice Questions Part 5 of the Series in Computer Fundamentals as one of the Electronics Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

Multiple Choice Questions Topic Outline

• MCQs in analog and Digital System
• MCQs in Binary Number System
• MCQs in Boolean Algebra
• MCQs in Mathematical Logic and Switching Networks
• MCQs in Basic digital Circuits (logic gates, flip-flops, multivibrators, etc)
• MCQs in Static and dynamic Memory Devices
• MCQs in Programming and Machine Languages
• MCQs in Information and Acquisition Processing
• MCQs in Analog / Digital Conversion
• MCQs in Computer Networking

The Series

Following is the list of multiple choice questions in this brand new series:

Computer Principles MCQs

PART 1: MCQs from Number 1 – 50                        Answer key: PART I

PART 2: MCQs from Number 51 – 100                   Answer key: PART II

PART 3: MCQs from Number 101 – 150                 Answer key: PART III

PART 4: MCQs from Number 151 – 200                 Answer key: PART IV

PART 5: MCQs from Number 201 – 250                 Answer key: PART V

PART 6: MCQs from Number 251 – 300                 Answer key: PART VI

Continue Practice Exam Test Questions Part 5 of the Series

201. It is needed to translate a high-level program into a sequence of machine instructions that performs the desired task.

• A. Assembler
• B. Interpreter
• C. Compiler
• D. Debugger

202. Text editors and formatters belong to the area of computing known as _____.

• A. software
• B. word processing
• C. compilers
• D. assemblers

203. The processor or central processing unit is

• A. the heart of the computer
• B. employed RISC
• C. communicates with the user
• D. supports floating point numbers

204. Processors with more than two registers for arithmetic and logical operations are classified as

• A. specific registered processors
• B. general register processors
• C. accumulator based
• D. serial register processor

205. Which of the following is a non-volatile device?

• A. ROM
• B. RAM
• C. PLA
• D. PLD

206. With a _____, a processor can store data at ay address and read back the stored information at any time.

• A. RWM
• B. ROM
• C. PLA
• D. PROM

207. The system program used to translate directly an assembly language to machine language is called

• A. assembler
• B. compiler
• C. text editor
• D. debugger

208. A command to an ADC to start conversion

• A. SOC
• B. EOC
• C. PAC
• D. EAR

209. Speeds of modems are generally classified by the number of _____ they can transmit.

• A. cycles per second
• B. bits per second
• C. frequency per second
• D. all of the choices

210. High speed modems transmit between

• A. 300 and 2400 bps.
• B. 2400 and 9600 bps
• C. between 2400 and 9600 bps
• D. between 300 and 2400 bps

211. Low speed modems method of modulation is usually

• A. phase-shift modulation
• B. dibit modulation
• C. frequency shift keying
• D. amplitude modulation

212. Low speed modems generally handle data rates between

• A. 3000 and 9000 bps
• B. 300 and 2400 bps
• C. 2400 and 9600 bps
• D. 100 and 2400 bps

213. The most important memory element which is made of an assembly of logic gates is called

• A. latch
• B. bistable multivibrator
• C. flip-flop
• D.all of the choices

214. What is the normal resting state of the SET and CLEAR inputs in a flip-flop

• A. Low, high
• B. High, low
• C. High, high
• D. Low, low

215. What will be the states of Q and Q’ after a flip-flop has been cleared?

• A. Q = 1, Q’ = 0
• B. Q = 0, Q’ = 1
• C. Q = 0, Q’ = 0
• D. Q = 1. Q’ = 1

216. When power is first applied to any flip-flop circuit, it is impossible to predict the initial state of Q and Q’. What could be done to ensure that NAND latch always started off in the Q = 1 state?

• A. apply a momentary HIGH to PRESET input
• B. apply a momentary LOW to SET input
• C. apply a momentary LOW to CLEAR input
• D. apply a momentary HIGH to CLEAR input

217. When a flip-flop is set, what are the states of Q and Q’?

• A. Q = 1, Q’ = 0
• B. Q = 0, Q’ = 1
• C. Q = 0, Q’ = 0
• D. Q = 1, Q’ = 1

218. What two types of inputs that a clocked flip-flop has?

• A. synchronous control inputs and clock input
• B. Asynchronous control inputs and clock input
• C. Pulsed control inputs and clock input
• D. all of the choices

219. The flip-flop can change only when the appropriate clock transition occurs. It is a condition called

• A. edge triggered
• B. latching
• C. clocking
• D. pulsing

220. It is the required interval immediately following the active edge of the clock signal during which the control inputs must be held stable.

• A. Hold time
• B. Pulsing time
• C. Set up time
• D. All the time

221. It is the required interval immediately following the active edge held of clocks during which the control inputs must be held.

• A. Set up time
• B. Hold time
• C. Pulsing time
• D. Propagation time

222. What JK input condition will always set Q upon the occurrence of the active clock transition?

• A. J = 0, K = 0
• B. J = 1, K = 0
• C. J = 0, K = 1
• D. J = 1, K = 1

223. How does the operation of asynchronous input differ from that of a synchronous input?

• A. it works independently of the clock input
• B. it is very dependent on the clock transition
• C. it is mutually the same in function
• D. Not determined by ordinary operation

224. The triangle inside the rectangle which is part of the IEEE/ANSI symbol at clock input

• A. indicates the function of those inputs that are common to more than one circuit in the chip
• B. indicates triggering on a NGT
• C. indicates edge-triggered operation
• D. all of the choices

225. Which type of flip-flop is best suited for synchronous transfer because it requires the fewest interconnections from one flip-flop to the other?

• A. JK
• B. T
• C. RS
• D. D

226. The fastest method for transferring data from one register to another is the

• A. serial transfer
• B. parallel transfer
• C. hybrid transfer
• D. FIFO

227. What is the major advantage of serial transfer over parallel transfer?

• A. large interconnections between gates
• B. one at a time transmission
• C. fewer interconnections between registers
• D. speed

228. A 20 KHz clock signal is applied to a JK flip-flop when J = 1, K = 1. What is the frequency of the flip-flop output waveform?

• A. 20 KHz
• B. 10 KHz
• C. 40 KHz
• D. 5 KHz

229. How many flip-flops are required for a counter that will count 0 to 255?

• A. 2
• B. 4
• C. 16
• D. 8

230. It converts a non-electrical physical quantity to an electrical quantity.

• A. Converter
• B. Inverter
• C. Transducer
• D. Compiler

231. What does a computer do with the data it receives from an ADC?

• A. Stores the data
• B. Performs calculation
• C. Processes the data
• D. All of the choices

232. An actuator in the DAC

• A. performs conversion of digital data to its analog representation
• B. controls a physical variable according to an electrical input signal
• C. converts a non-electrical physical quantity to an electrical quantity
• D. performs calculation

233. The maximum deviation of DAC output from its ideal value, expressed as percentage of full scale.

• A. Full scale error
• B. Deviation ratio
• C. Percentage error
• D. None of the choices

234. The time it takes for the DAC output to settle to within ½ step size of its full scale value when the digital input changes from zero to full scale.

• A. Settling time
• B. Set-up time
• C. Hold time
• D. Full scale time

235. Why are voltage DAC’s generally slower than current DAC’s?

• A. Because of the response time of the op-amp current-to-voltage converter
• B. Because of its internal construction
• C. Because voltage DAC’s have many heat losses
• D. None of the choices

236. What is the function of the comparator in the ADC?

• A. Tells control logic when the DAC output exceeds the analog input
• B. Compares two parameters only
• C. Addition and multiplication
• D. Arithmetic operation

237. Meaning of checksum in ROM’s

• A. It is a code placed in the last one or two ROM locations that represents the sum of the expected ROM data from all other locations.
• B. Used as a means to test for leakage in one or more ROM locations
• C. prevents decoding glitches
• D. regulates ROM

238. What is meant by interfacing in a computer system?

• A. Synchronization of data information operation in a computer
• B. Synchronization of digital information transmission between computer and external I/O devices
• C. Connection of computers
• D. Finding the fault in a network

239. Which of the items below is not one of the three major sections of an MPU?

• A. Timing and control
• B. ALU
• C. Register
• D. Inversion

240. What is an operand address?

• A. The binary code that represents the operation to be performed by the CPU
• B. The address of the data to be operated as the CPU executes the instruction called for by the opcode
• C. A short abbreviation for the operation
• D. All of the choices

241. What device puts data on the data bus during a write operation?

• A. ALU
• B. CPU
• C. Keyboard
• D. Accumulator

242. Instruction mnemonic means

• A. a short abbreviation for the operation
• B. a binary code that represents the operation to be performed by the CPU
• C. technical term sometimes added to an IC’s description
• D. representation of a quantity that varies in discrete steps

243. Arrival of a clock signal at the clock inputs of different flip-flops at different times as a result of propagation delays.

• A. Clock transition
• B. Buffer address
• C. Clock skew
• D. None of the choices

244. A circuit made up of combinations of logic gates, with no feedback from output to input.

• A. Sequential logic circuit
• B. Combinational logic circuit
• C. Clocked circuits
• D. Asynchronous circuit

245. A logic circuit that depends on the status of its selected inputs will channel its data input to one of several data outputs.

• A. MUX
• B. DMUX
• C. RAM
• D. ROM

246. Add (74)₈ with (1.1)₂

• A. (700)₁₀
• B. (70.5)₈
• C. (10101.01).₂
• D. (75.4)₈

247. An analog memory output circuit used to eliminate aperture error is called a

• A. MUX
• B. DMUX
• C. Track/store amplifier
• D. Flip-flop

248. Which of the following is not a dynamic test instrument?

• A. Logic probe
• B. Oscilloscope
• C. Logic analyzer
• D. Logic monitor

249. A translated program in machine language is called

• A. a source program
• B. an object program
• C. machine program
• D. users program

250. Perform binary subtraction to 6 ¼ and 4 ½ would result to

• A. 1001. 01
• B. 1.11
• C. 10. 11
• D. 1.00

Complete List of MCQs in Electronics Engineering per topic

Series of Multiple Choice Questions in Electronics Engineering

---

credit: © 2014 www.PinoyBIX.org