Description : In which computers, the binary number are represented by a set of binary storage device such as flip flop: a. Microcomputer b. Personal computer c. Digital computer
Last Answer : c. Digital computer
Description : Register are assumed to use positive-edge-triggered _ a. Flip-flop b. Logics Cc. Circuit d. Operation
Last Answer : a. Flip-flop
Description : A J -K flip-flop with J= 1 and K= 1 has a 20 kHz clock input. The Q output is : (A) Constant and low (B) Constant and high (C) A square wave with 20 kHz frequency (D) A square wave with 10 kHz frequency
Last Answer : a
Description : Which operation are binary type, and are performed on bits string that is placed in register: a. Logical micro operation b. Arithmetic micro operation c. Both d. None
Last Answer : a. Logical micro operation
Description : How is selects the register that receives the information from the output bus. Decoder Encoder MUX
Last Answer : Decoder
Description : A binary number with 8 bits is called asa___ a. Bytes b. Bits c. Nibble d. __ Allof these
Last Answer : a. Bytes
Description : Which number is formed from a binary number by grouping bits in groups of 4-bit each starting at the binary point: a. Binary b. Octal c. Decimal d. Hexadecimal
Last Answer : d. Hexadecimal
Description : Group of binary bits(0&1) is known as: a. Binary code b. Digit code
Last Answer : a. Binary code
Description : A group of 4 binary bits is called. a. Nibble b. Byte c. Decimal d. Digit
Last Answer : a. Nibble
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 : How many flip flop are required to store the binary value of 1101?
Last Answer : What is the answer ?
Description : In a computer is capable to store single binary bit. A) Capacitor B) Flip flop C) Register D) Inductor
Last Answer : Answer : B
Description : In a Computer_________ is capable to store single binary bit. 1) Capacitor 2) Flip Flop 3) Register 4) Inductor
Last Answer : 2) Flip Flop
Description : In a Computer_________ is capable to store single binary bit. 1 Capacitor 2 Flip Flop 3 Register 4 Inductor
Last Answer : 2 Flip Flop
Description : In the case of a left arithmetic shift , zeros are Shifted to the 3 a. Left b. Right Cc. Up d. Down
Last Answer : b. Right
Description : In the case of a right arithmetic shift the sign bit values are shifted to the a. Left b. Right Cc. Up d. Down
Last Answer : a. Left
Description : In a positive-edge-triggered JK flip-flop, if J and K both are high then the output will be ............. on the rising edge of the clock. (A) No change (B) Set (C) Reset (D) Toggle
Last Answer : (D) Toggle
Description : is an external hardware event which causes the CPU to interrupt the current instruction sequence: a. Input interrupt b. Output interrupt c. Both d. None of these
Last Answer : c. Both
Description : Memory —mapped ___is used this is just another memory address. a. Input b. Output c. Both d. None
Description : An eight stage ripple counter uses a flip-flop with propagation delay of 75 nanoseconds. The pulse width of the strobe is 50ns. The frequency of the input signal which can be used for proper operation of the counter is approximately (A) 1 MHz. (B) 500 MHz. (C) 2 MHz. (D) 4 MHz.
Last Answer : Maximum time taken for all flip-flops to stabilize is 75ns x 8 + 50 = 650ns. Frequency of operation must be less than 1/650ns = 1.5 MHz.
Description : In a JK flip-flop, for what input next state is complement of the present state (A)J=0,K=0 (B)J=1,K=0 (C)J=0,K=1 (D)J=1,K=1
Last Answer : In a JK flip-flop, for what input next state is complement of the present state (A)J=0,K=0 (B)J=1,K=0 (C)J=0,K=1 (D)J=1,K=1
Description : A 3 -stage ripple counter has Flip Flop with propagation delay of 25 nsec and pulse width of strobe input 10 nsec. Then the maximum operating frequency at which counter operates reliably is
Last Answer : A 3 -stage ripple counter has Flip Flop with propagation delay of 25 nsec and pulse width of strobe input 10 nsec. Then the maximum operating frequency at which counter operates reliably is 12.67 MHz
Description : In an unclocked R-S flip flop made of NOR gates, the forbidden input condition is: (1) R=0, S=0 (2) R=1, S=0 (3) R=0, S=1 (4) R=1, S=1
Last Answer : In an unclocked R-S flip flop made of NOR gates, the forbidden input condition is: R=1, S=1
Description : If a voltage (positive or negative) is measured on the "1" output of a flip-flop, what state is it in?
Last Answer : SET state.
Description : The output of SR flip flop when S=1, R=0 is (A) 1 (B) 0 (C) No change (D) High impedance
Last Answer : Ans: A As for the SR flip-flop S=set input R=reset input ,when S=1, R=0, Flip-flop will be set.
Description : For JK flip flop with J=1, K=0, the output after clock pulse will be (A) 0. (B) 1. (C) high impedance. (D) no change.
Last Answer : (B) 1.
Description : The output of a JK flip-flop with asynchronous preset and clear inputs is ‘1’. The output can be changed to ‘0’ with one of the following conditions by applying A) J = 0, K = 0 and using a clock B) J = 1, K = 0 and using the clock C) Asynchronous preset input D) J = 1, K = 1 and using the clock
Last Answer : The output of a JK flip-flop with asynchronous preset and clear inputs is ‘1’. The output can be changed to ‘0’ with one of the following conditions by applying J = 1, K = 1 and using the clock
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 : It contains the stack for PC storage during subroutine calls and input/output interrupt services: a. Seven- level hardware b. Eight- level hardware
Last Answer : b. Eight- level hardware
Description : Which interrupt services save all the register and flags. a. Save interrupt b. Input/output interrupt c. Service interrupt d. All of these
Last Answer : b. Input/output interrupt
Description : Which are benefit of input/output interrupt: a. It is an external analogy to exceptions b. The processor initiates and perform all I/O operation c. The data is transferred into the memory through interrupt handler d. = Alllof these
Last Answer : d. = Alllof these
Description : Which unit is comparable to the central nervous system in the human body: a. Output unit b. Control unit c. Input unit d. All of these
Last Answer : b. Control unit
Description : An __ -0 option is used for. a. Input file b. External file c. Output file d. None of these
Last Answer : c. Output file
Description : If we define putchar function in putchar :. char -> IO () syntax than character input as an argument andreturns a. Useful value b. Get output c. Getno output d. None of these
Last Answer : c. Getno output
Description : The front panel display provides lights as green LED represent sand red LED represent _ for device programmer who writes input/output basic: a. Busy and Error b. Error and Busy c. Busy and Busy d. Error and Error
Last Answer : a. Busy and Error
Description : The processed data is sent for output to standard __ device which by default is computer screen: a. Input b. Output c. Botha &b d. None of these
Last Answer : b. Output
Description : Which are contains one or more register that may be referenced by machine instruction: a. Input b. Output c. CPU d. ALU
Last Answer : c. CPU
Description : Which instruction are 32 bits long , with extra 16 bits. a. Memory reference instruction b. Memory reference format c. Both d. None of these
Last Answer : a. Memory reference instruction
Description : In instruction formats instruction is represent by a___ _ of bits: a. Sequence b. Parallel c. Both d. None
Last Answer : a. Sequence
Description : In register transfer which system is a sequential logic system in which flip-flops and gates are constructed: a. Digital system b. Register Cc. Data d. None
Last Answer : a. Digital system
Description : Which of the following memory device stores information such as subscriber’s identification number in GSM? a) Register b) Flip flop c) SIM d) SMS
Last Answer : c) SIM
Description : Which operation is extremely useful in serial transfer of data: a. Logical micro operation b. Arithmetic micro operation c. Shift micro operation d. None of these
Last Answer : c. Shift micro operation
Description : Which addition is performed in the same manner as decimal addition: a. Binary b. Decimal c. Both d. None of these
Last Answer : a. Binary
Description : O and 1 abbreviation for. a. Binary digit b. Octal digit c. Both d. None of these
Last Answer : a. Binary digit
Description : which shift is used for signed binary number: a. Logical b. Arithmetic c. Both d. None of these
Last Answer : b. Arithmetic
Description : How many bits of mantissa : a. 4 b. 8 ec. 10 d. 16
Last Answer : ec. 10
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 : __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 : The _stack can be 4-word memory addressed by 2 bits from an up/down counter known as the stack pointer: a. FIFO b. PIPO c. SISO d. LIFO
Last Answer : d. LIFO
Description : Various machine level components are: a. Address register > Program counter c Data register d. Accumulator register e. Memory of 2K,16 bits/word RAM f. Multiplexers g. Allof these
Last Answer : g. Allof these