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:
Continue Practice Exam Test Questions Part 4 of the Series
151. A system of coordinating I/O between the transmitting and receiving devices.
- A. Charging
- B. Handshaking
- C. Interfacing
- D. Polling
152. An area of memory that holds the ASCII characters that are being displayed on a monitor.
- A. Space
- B. Start bit
- C. Terminal
- D. Screen image
153. An IC that transforms parallel data to serial in the asynchronous format and vice versa.
- A. UART
- B. USART
- C. MODEM
- D. RS232C
154. An instruction that alters the normal course of a program by causing it to jump to another instruction.
- A. Rotate instruction
- B. Skip instruction
- C. Jump
- D. ACC
155. An instruction that causes data to be brought from memory into an accumulator register.
- A. LOAD
- B. LOOP
- C. FETCH
- D. JUMP
156. The portion of an instruction cycle where the instruction is sent from memory to the instruction register
- A. LOAD
- B. ACCUMULATE
- C. FETCH
- D. EXECUTE
157. An instruction that causes data in the accumulator to be moved to the memory or a peripheral register.
- A. FETCH
- B. STORE
- C. LOOP
- D. LOAD
158. This occurs when the result of an arithmetic operation is a more negative number than the output register can accommodate.
- A. Error
- B. Overflow
- C. Underflow
- D. Don’t care
159. This occurs when the result of an arithmetic operation is a larger number than the output register can accommodate.
- A. Overflow
- B. Inflow
- C. Underflow
- D. Lock-ahead carry
160. A representation of numbers when negative numbers are obtained by complementing their positive equivalent and adding 1.
- A. 2’s complement
- B. Inversion
- C. Signed numbers
- D. Indeterminate
161. Which of the following is the language used in making an internet web page?
- A. Highertext mark-up language
- B. Hypertext mark-up language
- C. Hightech mark-up language
- D. Hypertext make-up language
162. A program which can be executed on several different computers to compare their speed and performance.
- A. Compiler
- B. Assembler
- C. Diagnostic program
- D. Benchmark
163. A single word memory location used to temporarily hold data during program execution.
- A. Accumulator
- B. Register
- C. Buffer
- D. Stack
164. Refer to the debugging method in which the program is executed one instruction at a time and the register contents can be examined after each step?
- A. Text editing
- B. Syntax analyzing
- C. Trace
- D. Semantic tracing
165. In a computer system, it is a unit of hardware where the control keys are located.
- A. CPU
- B. Keyboard
- C. I/O section
- D. Console
166. If a certain circuit acts as AND gate when used with positive logic (H = 1, L = 0), what function will it perform when used with negative logic (H = 0, L = 1).
- A. OR
- B. AND
- C. NAND
- D. NOR
167. TTL, DTL and ECL which are frequently used to refer to certain “families” of digital integrated circuits, are actually names of
- A. alternatives to positive and negative logic
- B. varieties of positive and negative logic
- C. companies that originated the families
- D. general varieties of electronic circuits used as logic gates, from which, in essence, the building blocks in each series are constructed.
168. In the data sheet of a digital building block, operating speed is typically expressed in terms of
- A. capacitance C
- B. transition frequency
- C. propagation delay times for both possible output transitions
- D. miles per hour or centimeters per second
169. The fan out capability of a digital building block depends on the current capability of its output and the current requirement of each input driven by that output, and maybe defined as the
- A. number of inputs that one output can transmit to
- B. number of other inputs that can transmit to one input
- C. maximum power dissipation that the unit can stand
- D. amount of cooling required
170. Noise margin, which is one indication of how likely it is that information communicated between digital building blocks will be incorrect due to noise, depends on
A. output current capabilities and input current requirements
B. output power and required input power for the two logic states
C. the “safety margin” between the output voltage produced by the transmitting block and input voltage required by the receiving block for each of the two logic state.
D. the “safety margin” between the noise level and the noise figure.
171. Typical propagation delay range for modern digital integrated circuits is
- A. 1 to 100 milliseconds
- B. 1 to 100 microseconds
- C. 1 to 100 nanoseconds
- D. 1 to 100 picoseconds
172. The most commonly used IC package for digital integrated circuits is the
- A. CMOS pack
- B. DIP ceramic
- C. DIP plastic
- D. Flat pack
173. A multiwire connection between digital circuits is usually called a
- A. ribbon
- B. bus
- C. wire wrap
- D. multiplexed line
174. Which of the following is a form of De Morgan’s theorem?
- A. A + B = (AB)’
- B. AB = (A + B)’
- C. (A + B)’ = A’ · B’
- D. A·B = A’ · B’
175. “Limbo” state of a flip-flop occurs when
- A. both outputs are low
- B. both outputs are high
- C. both output are the same
- D. the outputs are inverse
176. A logic circuit that is triggered by a clock signal is
- A. sequential
- B. synchronous
- C. synchronous
- D. pulsed
177. Another name for a decade counter
- A. frequency divider
- B. ripple shift counter
- C. BCD counter
- D. Binary counter
178. Which of the items below can perform parallel-to-serial data conversion?
- A. Shift register
- B. Binary counter
- C. Multiplexer
- D. Decoder
179. Which of the following does not form DACs?
- A. Counter
- B. Resistor network
- C. Current switches
- D. Reference
180. What digits are used in the binary number system?
- A. 0 and 1
- B. high and low
- C. true and false
- D. all of the choices
181. How many bits are in a byte?
- A. 8
- B. 4
- C. 2
- D. 16
182. What binary number follows 1110?
- A. 1010
- B. 0111
- C. 1111
- D. 1000
183. What capital letter corresponds to 1000101 in the ASCII code?
- A. A
- B. C
- C. D
- D. E
184. What is the binary ASCII code for a question mark?
- A. 0111110
- B. 0111111
- C. 0111000
- D. 0100011
185. In the 7400 Family of TTL Devices, Quad 2-input NAND gates has a device number equivalent to
- A. 7400
- B. 7402
- C. 7432
- D. 7486
186. Quad 2-input XOR gates in the 7400 Family of TTL devices has a device number equivalent to
- A. 7402
- B. 7486
- C. 7408
- D. 7404
187. A JK flip-flop will operate in the toggle mode when
- A. J = 0, K = 0
- B. J = 1, K = 0
- C. J = 1, K = 1
- D. J = 0, K = 1
188. A digital circuit test equipment which is a troubleshooting tool that generates a short-duration pulse when activated manually, usually by pressing the button is the _____.
- A. logic probe
- B. VOM
- C. logic clip
- D. logic pulser
189. An RS flip-flop will not change in state when
- A. R = 0, S = 0
- B. R = 1, S = 0
- C. R = 0, S = 1
- D. R =1, S = 1
190. A T flip-flop can be derived by
- A. connecting the two inputs of the JK flip-flop together
- B. by inverting the inputs of a JK flip-flop
- C. connecting the RS flip-flop’s input to ground
- D. securing an integrated circuit with three inputs
191. The number of digits used by a number system.
- A. Base
- B. Radix
- C. 2n
- D. n
192. What is the condition of the flip-flop when Q = 0 and Q = 1?
- A. Reset
- B. Set
- C. Undetermined
- D. Preset
193. How many logic gates are in an SSI chip?
- A. Less than 12 gates
- B. Between 12 to 99 gates
- C. Anywhere from 100 to 9999 gates
- D. 10,000 or more
194. How many logic gates are in an MSI chip?
- A. Less than 12 gates
- B. Between 12 to 99 gates
- C. Anywhere from 100 to 9999 gates
- D. 10,000 or more
195. How many logic gates are in a VLSI chip?
- A. Less than 12 gates
- B. Between 12 to 99 gates
- C. Anywhere from 100 to 9999 gates
- D. 10,000 or more
196. Which of the following items below is not a part of the hardware organization in a computer?
- A. Architecture
- B. Implementation
- C. Hardware realization
- D. Assembler
197. It consists of the instructions and data that the computer hardware manipulates to perform useful work.
- A. Software
- B. Program
- C. File
- D. Data
198. The data manipulated by a program is called _____ depending on its nature and extent.
- A. data base
- B. file
- C. input
- D. all of the choices
199. The most primitive instructions that can be given to a computer are those interpreted directly by the hardware in __________ form.
- A. assembly language
- B. machine language
- C. high-level language
- D. simulator
200. It represents machine instructions by mnemonic names and allows memory addresses and other constants to be represented by symbols rather than bit strings.
- A. Assembler
- B. Machine language
- C. Assembly language
- D. Interpreter
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