Description : ROM has a: a) Decoder followed by encoder b) Multiplexer followed by decoder c) Demultiplexer followed by an encoder d) None of the above
Last Answer : Ans: A
Description : The device which changes from serial data to parallel data is (A) COUNTER (B) MULTIPLEXER (C) DEMULTIPLEXER (D) FLIP-FLOP
Last Answer : Ans: C The device which changes from serial data to parallel data is demultiplexer. (A demultiplexer takes in data from one line and directs it to any of its N outputs depending on the status of the select inputs.)
Description : What is priority Encoder?
Last Answer : A priority encoder is an encoder circuit that includes the priority function. In priority encoder, if 2 or more inputs are equal to 1 at the same time, the input having the highest priority will take precedence.
Description : Define Encoder?
Last Answer : An encoder has 2n input lines and n output lines. In encoder the output lines generate the binary code corresponding to the input value.
Description : Define multiplexer
Last Answer : Multiplexer is a digital switch. If allows digital information from several sources to be routed onto a single output line.
Description : How many select lines will a 32:1 multiplexer will have (A) 5. (B) 8. (C) 9. (D) 11.
Last Answer : (A) 5.
Description : The number of control lines for 32 to 1 multiplexer is (A) 4. (B) 5. (C) 16. (D) 6.
Last Answer : Ans: B The number of control lines for 32 (2^5) and to select one input among them total 5 select lines are required.
Description : The number of control lines for 16 to 1 multiplexer is (A) 2. (B) 4. (C) 3. (D) 5.
Last Answer : (B) 4.
Description : The commercially available 8-input multiplexer integrated circuit in the TTL family is (A) 7495. (B) 74153. (C) 74154. (D) 74151.
Last Answer : Ans: B MUX integrated circuit in TTL is 74153.
Description : How many select lines will a 16 to 1 multiplexer will have (A) 4 (B) 3 (C) 5 (D) 1
Last Answer : (A) 4
Description : The number of control lines for a 8 – to – 1 multiplexer is (A) 2 (B) 3 (C) 4 (D) 5
Last Answer : Ans: B The number of control lines for an 8 to 1 Multiplexer is 3 (The control signals are used to steer any one of the 8 inputs to the output)
Description : What is binary decoder?
Last Answer : A decoder is a combinational circuit that converts binary information from n input lines to a maximum of 2n out puts lines.
Description : Define Decoder
Last Answer : A decoder is a multiple - input multiple output logic circuit that converts coded inputs into coded outputs where the input and output codes are different.
Description : Data transfers are done using: a. Multiplexer switching b. Demultiplexer switching c. Adder switching d. Subtractor switching
Last Answer : a. Multiplexer switching
Description : A ________ is a repeater. A) regenerator B) ADM C) STS multiplexer/demultiplexer D) none of the above
Last Answer : STS multiplexer/demultiplexer
Description : The decimal equivalent of the BCD value 0111 0110 1000 is ________. 124) A) 70810 B) 17210 C) 76810 D) 6871
Last Answer : C) 76810
Description : The decimal equivalent of the BCD value 1000 0110 is ________. 118) A) 8610 B) 7610 C) 8810 D) 8110
Last Answer : A) 8610
Description : The decimal equivalent of the BCD value 1001 1001 is ________. 113) A) 9310 B) 9510 C) 9910 D) 8910
Last Answer : C) 9910
Description : The BCD equivalent of decimal 64 is ________. 101) A) 0111 0110BCD B) 0111 1110BCD C) 0100 0010BCD D) 0110 0100BCD
Last Answer : D) 0110 0100BCD
Description : The BCD equivalent of decimal 109 is ________. 99) A) 1110 1011BCD B) 0001 0000 1001BCD C) 1110 1110 1100BCD D) 0001 0000 1101BCD
Last Answer : B) 0001 0000 1001BCD
Description : Which numbering formats are really codes rather than true number systems? 96) A) hexadecimal and octal B) binary and octal C) decimal and binary D) BCD and ASCII
Last Answer : Which numbering formats are really codes rather than true number systems?
Description : Which numbering format is used to represent both numbers and letters on a keyboard? 79) A) octal B) ASCII C) hexadecimal D) BCD
Last Answer : B) ASCII
Description : Which numbering format is the basis for digital electronic circuitry? 76) A) decimal B) BCD C) octal D) binary
Last Answer : D) binary
Description : The BCD equivalent of decimal 912 is ________. 60) A) 1001 0001 0010BCD B) 1001 1000 0001BCD C) 0111 1111 1110BCD D) 0010 001 1001BCD
Last Answer : A) 1001 0001 0010BCD
Description : The decimal equivalent of the BCD value 1001 0011 is ________. 59) A) 9310 B) 16610 C) 9810 D) 17610
Last Answer : A) 9310
Description : The decimal equivalent of the BCD value 0010 0011 is ________. 57) A) 2710 B) 2310 C) 4310 D) 2010
Last Answer : B) 2310
Description : The decimal equivalent of the BCD value 0011 1001 0010 is ________. 32) A) 49010 B) 39210 C) 98210 D) 4131
Last Answer : B) 39210
Description : Which numbering format is most commonly used in a computer's machine language? 23) A) ASCII B) hexadecimal C) octal D) BCD
Last Answer : B) hexadecimal
Description : The code where all successive numbers differ from their preceding number by single bit is (A) Binary code. (B) BCD. (C) Excess – 3. (D) Gray.
Last Answer : Ans: D The code where all successive numbers differ from their preceding number by single bit is Gray Code. (It is an unweighted code. The most important characteristic of this code is that only a single bit change occurs when going from one code number to next.)
Description : The seven segment arrangement for numerical display on consoles, test meters and other applications can be either ________________. A. UJT or BJT B. BCD or OCD C. JFET or IGFET D. LED or LCD
Last Answer : Answer: D
Description : The vehicle through which the coded message is transmitted from the source to the receiver is called a(n) A)coder. B)decoder. C)encoder. D)relay channel. E)medium of transmission.
Last Answer : E)medium of transmission.
Description : What is the difference between decoder and encoder ?
Last Answer : Differences between decoders and encoders Differences between decoders A decoder is a logic circuit that decodes a code. Used in computer memory . It takes a maximum of 2n output from n input . The difference of ... Out of the maximum 2 inputs, 1 or 0 outputs are available in n output lines .
Description : Which causes a quantization noise in PCM system? A. Serial transmission errors B. The approximation of the quantized signal C. The synchronization between encoder and decoder D. Binary coding techniques
Last Answer : B. The approximation of the quantized signal
Last Answer : The approximation of the quantized signal
Description : Quantization noise is caused by A. binary coding techniques B. serial transmission errors C. the synchronization between encoder and decoder D. the approximation of the quantized signal
Last Answer : D. the approximation of the quantized signal
Description : How is selects the register that receives the information from the output bus. Decoder Encoder MUX
Last Answer : Decoder
Description : It is used to encode the minimum amount of speech information necessary to reproduce a perceptible message with a fewer bits that those needed by a conventional encoder/decoder
Last Answer : vocoders
Description : Expressive communication is driven by (A) Passive aggression (B) Encoder’s personality characteristics (C) External clues (D) Encoder-decoder contract
Last Answer : (B) Encoder’s personality characteristics
Description : In circular communication, the encoder becomes a decoder when there is (A) noise (B) audience (C) criticality (D) feedback
Description : Communication becomes circular when (A) the decoder becomes an encoder (B) the feedback is absent (C) the source is credible (D) the channel is clear
Last Answer : Answer: A Circular (contextual) Discussion is conducted in a circular manner, telling stories and developing a context around the main point, which is often unstated be cause the listener will get the point after I give them all the information. There is a high reliance on context.
Description : In RISC architecture access to registers is made as a block and register file in a particular register can be selected by using: a. Multiplexer b. Decoder c. Subtractor d. Adder
Last Answer : b. Decoder
Description : Which of the following is a sequential circuit? (A) Multiplexer (B) Decoder (C) Counter (D) Full adder
Last Answer : (C) Counter
Description : How many different symbols are used in the octal number system? 108) A) ten B) two C) seven D) eight
Last Answer : D) eight
Description : The base of the octal system is 71) A) eight. B) two. C) ten. D) seven.
Last Answer : A) eight.
Description : The information in ROM is stored (A) By the user any number of times. (B) By the manufacturer during fabrication of the device. (C) By the user using ultraviolet light. (D) By the user once and only once.
Last Answer : (B) By the manufacturer during fabrication of the device.
Description : The logic 0 level of a CMOS logic device is approximately (A) 1.2 volts (B) 0.4 volts (C) 5 volts (D) 0 volts
Last Answer : Ans: D CMOS logic low level is 0 volts approx.
Description : Which converts the user data into machine readable form? A) input unit, output unit, control unit B) central processing unit C) output unit D) decoder unit
Last Answer : Answer : A
Description : Figure 'D' shown in the illustration represents a/an ____________. EL-0078 A. DIP IC chip B. integrated diac/triac envelope C. TO-5 flat pack D. 7-segment BCD display
Last Answer : Answer: A
Description : The process of entering data into a ROM is called (A) burning in the ROM (B) programming the ROM (C) changing the ROM (D) charging the ROM
Last Answer : Ans: B The process of entering data into ROM is known as programming the ROM.
Description : Multiplexing in a time division multiplexer occurs based upon A. the position of a frame within the group of frames B. the positioning of data within a frame C. the priority assigned to a connected device D. the activity of a connected device
Last Answer : B. the positioning of data within a frame