Description : Each check bit is grouped with the information bits as specified by a__ a. Parity check code b. Parity check matrix c. Parity check bit d. All of these
Last Answer : b. Parity check matrix
Description : How many 8-bit characters can be transmitted per second over a 9600 baud serial communication link using asynchronous mode of transmission with one start bit, eight data bits, two stop bits, and one parity bit ? a. 600 b. 800 c. 876 d. 1200
Last Answer : b. 800
Description : How many characters per sec (7 bits + 1 parity ) can be transmitted over a 2400 bps line if the transfer is synchronous (1 start and 1 stop bit)?
Last Answer : 1. 300 2. 240 3. 250 4. 275 Ans- 2400/(7+1+2) 240
Description : A data file of 1,00,000 characters contains only the characters g-l, with the frequencies as indicated in table: using the variable-length code by Huffman codes, the file can be encoded with (A) 2,52,000 bits (B) 2,64,000 bits (C) 2,46,000 bits (D) 2,24,000 bits
Last Answer : (D) 2,24,000 bits
Description : A simple parity-check code can detect __________ errors A. an even-number of B. two C. no errors D. an odd-number of
Last Answer : D. an odd-number of
Description : What is used to identify whether a data word has an odd or even number of 1’s ? (1) Carry bit (2) Sign bit (3) Zero bit (4) Parity bit
Last Answer : Parity bit
Description : Instructions and memory address are represented by A) Character code B) Binary codes C) Binary word D) Parity bit
Last Answer : Answer : B
Description : Instructions and memory address are represented by a. Character code b. Binary codes c. Binary word d. Parity bit
Last Answer : Binary codes
Last Answer : b. Binary codes
Description : Which error detection method consists of just one redundant bit per data unit? A) Simple parity check B) Two-dimensionalparity check C) CRC D) Checksum
Last Answer : Simple parity check
Description : Parity bit check is used to
Last Answer : Parity bit check is used to Detect 1 bit error
Description : Which of the following is associated with error detector? A) Odd parity bit B) Even parity bit C) Both of the above D) None of above
Last Answer : Answer : C
Description : Which of the following is associated with error detector? a. Odd parity bit b. Even parity bit c. Both of the above d. None of above
Last Answer : Both of the above
Last Answer : c. Both of the above
Description : Which method is used to detect double errors and pinpoint erroneous bits. a. Even parity method b. Odd parity method c. Check sum method. d. All of these
Last Answer : c. Check sum method.
Description : For the 8-bit word 00111001, the check bits stored with it would be 0111. Suppose when the word is read from memory, the check bits are calculated to be 1101. What is the data word that was read from memory? (A) 10011001 (B) 00011001 (C) 00111000 (D) 11000110
Last Answer : (B) 00011001
Description : 12 voice channels are sampled at 8000 sampling rate and encoded into 8 bit PCM word. Determine the rate of the data stream. a. 354 kbps b. 750 kbps c. 768 kbps d. 640 kbps
Last Answer : c. 768 kbps
Description : How many characters per sec (7 bits + 1 parity) can be transmitted over a 2400 bps line if the transfer is synchronous (1 start bit and 1 stop bit)? A) 300 B) 240 C) 250 D) 275
Last Answer : How many characters per sec (7 bits + 1 parity) can be transmitted over a 2400 bps line if the transfer is synchronous (1 start bit and 1 stop bit)? 300
Description : Areceived sith a bit error will be closer to the originally transmitted code word than to any other code word: a. Code word b. Noncode word c. Decoding d. All of these
Last Answer : b. Noncode word
Description : An artist makes an RGB raster image in which each pixel color is encoded with 12-bits --- 4 bits each for red, green and blue.Which of the following correctly shows the hexadecimal value for Red as a 12-bit representation A. F00 B. 00F C. FF00 D. FF0000
Last Answer : D. FF0000
Description : In certain coding method, the word QUESTION is encoded as DOMESTIC. In this coding, what is the code word for the word RESPONSE? (A) OMESUCEM (B) OMESICSM (C) OMESICEM (D) OMESISCM
Last Answer : (C) OMESICEM
Description : The Excess-3 decimal code is a self-complementing code because (A) The binary sum of a code and its 9’s complement is equal to 9. (B) It is a weighted code. (C) Complement can be generated by inverting each bit pattern. (D) The binary sum of a code and its 10’s complement is equal to 9.
Last Answer : Answer: A, C
Description : Given the following statements: (a) Frequency Division Multiplexing is a technique that can be applied when the bandwidth of a link is greater than combined bandwidth of signals to be transmitted. (b) Wavelength Division Multiplexing (WDM) ... c) is true. (D) (a), (b) and (d) are true; (c) is false.
Last Answer : (D) (a), (b) and (d) are true; (c) is false.
Description : Which flag indicates the number of 1 bit that results from an operation? a) Zero b) Parity c) Auxiliary d) Carry
Last Answer : Answer: b Explanation: The parity flag indicates the number of 1 bits in any operation. The resultant bit is called the parity bit. The main aim of the parity bit is to check for errors
Description : How is the parity bit in each storage location used?
Last Answer : To detect errors in the circuitry.
Description : Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is
Last Answer : Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is 12CPS.
Description : What is the output of the following piece of code when executed in Python shell? >>> a=("Check")*3 >>> a a) (‘Check’,’Check’,’Check’) b) * Operator not valid for tuples c) (‘CheckCheckCheck’) d) Syntax erro
Last Answer : c) (‘CheckCheckCheck’)
Description : In a binary Hamming code the number of check digits is r then number of message digits is equal to: (A) 2r-1 (B) 2r-r-1 (C) 2r-r+1 (D) 2r+r-1
Last Answer : (B) 2r-r-1
Description : The pattern of groups that have odd parity calledthe ses must match one of the of columns in the parity check matrix: a. Syndrome b. Dynodes c. Both d. None of these
Last Answer : a. Syndrome
Description : Which error detection method usesone's complement arithmetic? A) Simple parity check B) Two-dimensionalparity check C) CRC D) Checksum
Last Answer : Checksum
Description : The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called ____________ a. piggybacking b. cyclic redundancy check c. fletcher’s checksum d. parity check
Last Answer : a. piggybacking
Description : Which error detection method uses one's complement arithmetic? A. Simple parity check B. Two-dimensional parity check C. CRC D. Checksum
Last Answer : D. Checksum
Description : The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called ____________ A. piggybacking B. cyclic redundancy check C. fletcher’s checksum D. parity check
Last Answer : A. piggybacking
Last Answer : A parity check usually can detect One-bit error.
Description : An error-detectingcode inserted asa field in a blockof data tobe transmitted is known as A. Frame check sequence B. Error detecting code C. Checksum D. flow control E. None of the above
Last Answer : Frame check sequence
Description : Given an image of size 1024 × 1024 pixels in which intensity of each pixel is an 8-bit quality. It requires ............... of storage space if the image is not compressed. (A) one Terabyte (B) one Megabyte (C) 8 Megabytes (D) 8 Terabytes
Last Answer : (B) one Megabyte
Description : The size of the ROM required to build an 8-bit adder/subtractor with mode control, carry input, carry output and two’s complement overflow output is given as
Last Answer : (B) 218 × 10
Description : The message 11001001 is to be transmitted using the CRC polynomial x3+1 to protect it from errors. The message that should be transmitted is (A) 110010011001 (B) 11001001 (C) 110010011001001 (D) 11001001011
Last Answer : (D) 11001001011
Description : Which of the following is not associated with the session layer? (A) Dialog control (B) Token management (C) Semantics of the information transmitted (D) Synchronization
Last Answer : (C) Semantics of the information transmitted
Description : While transmitting odd-parity coded symbols, the number of zeros in each symbol is a. odd b. even c. a and b both d. unknown
Last Answer : unknown
Description : When the set of input data to an even parity generator is 0111, the output will be (A) 1 (B) 0 (C) Unpredictable (D) Depends on the previous input
Last Answer : Ans: B In even parity generator if number of 1 is odd then output will be zero.
Description : __is divided into a number of fields and is represented as a sequence of bits: a. instruction b. — instruction set c. instruction code d. parity code
Last Answer : a. instruction
Description : In Unix, how do you check that two given strings a and b are equal ? (A) test $a -eq $b (B) test $a -equal $b (C) test $a=$b (D) Sh -C test $a==$b
Last Answer : (C) test $a=$b Answer: C Explanation: Tests for a zero-length string: test -z string Tests for a nonzero string length: test -n string Tests two strings for equality: ... Tests two strings for inequality: test string1 != string2 Tests for a nonzero string length: test string
Description : Given the symbols A, B, C, D, E, F, G and H with the probabilities 1/30, 1/30, 1/30, 2/30, 3/30, 5/30, 5/30 and 12/30 respectively. The average Huffman code size in bits per symbol is: (A) 67/30 (B) 70/34 (C) 76/30 (D) 78/30
Last Answer : (C) 76/30
Description : What is the reason that in the beginning of encoded file there is data telling which digit/letter represents which word ? a) It is needed to convert the file in compression form b) it is ... convert the file in its original uncompressed form d) it is needed to convert the file in graphical form
Last Answer : c) it is needed to convert the file in its original uncompressed form
Description : Where in the encoded file, one can have the data that tells which digit/letter represents which word ? a) Beginning b) Middle c) Ending d) None of these
Last Answer : a) Beginning
Description : A …………………….. creates copies during replication that are functionally equivalent but have distinctly different bit patterns. A) Boot Sector Virus B) Polymorphic Virus C) Parasitic Virus D) Macro Virus
Last Answer : B) Polymorphic Virus
Description : Binary symmetric channel uses (A) Half duplex protocol (B) Full duplex protocol (C) Bit oriented protocol (D) None of the above
Last Answer : (A) Half duplex protocol
Description : Images tend to be very large collection of data. The size of memory required for a 1024 by 1024 image in which the colour of each pixel is represented by a n-bit number, (in an 8 bit machines) is (A) n × 8 MB (B) n / 8 MB (C) (1024 × 1024) / 8 MB (D) 1024 MB
Last Answer : (B) n / 8 MB