QN1: Where does a computer add and compare data?
a. Hard disk
b. Floppy disk
c. CPU chip
d. Memory chip
Answer
Answer: c. CPU chip
QN2: Which of the following registers is used to keep track of address of the memory
location where the next instruction is located?
a. Memory Address Register
b. Memory Data Register
c. Instruction Register
d. Program Register
Answer
Answer: d. Program Register
QN3: A complete microcomputer system consists of
a. microprocessor
b. memory
c. peripheral equipment
d. all of above
Answer
Answer: d. all of above
QN4: CPU does not perform the operation
a. data transfer
b. logic operation
c. arithmetic operation
d. all of above
Answer
Answer: d. all of above
QN5: Pipelining strategy is called implement
a. instruction execution
b. instruction prefetch
c. instruction decoding
d. instruction manipulation
Answer
Answer: b. instruction prefetch
QN6: A stack is
a. an 8-bit register in the microprocessor
b. a 16-bit register in the microprocessor
c. a set of memory locations in R/WM reserved for storing information temporarily during the execution of computer
d. a 16-bit memory address stored in the program counter
Answer
Answer: c. a set of memory locations in R/WM reserved for storing information temporarily during the execution of computer
QN7: A stack pointer is
a. a 16-bit register in the microprocessor that indicate the beginning of the stack memory.
b. a register that decodes and executes 16-bit arithmetic expression.
c. The first memory location where a subroutine address is stored.
d. a register in which flag bits are stored
Answer
Answer: a. a 16-bit register in the microprocessor that indicate the beginning of the stack memory.
QN8: The branch logic that provides decision making capabilities in the control unit is known as
a. controlled transfer
b. conditional transfer
c. unconditional transfer
d. none of above
Answer
Answer: c. unconditional transfer
QN9: Interrupts which are initiated by an instruction are
a. internal
b. external
c. hardware
d. software
Answer
Answer: d. software
QN10: A time sharing system imply
a. more than one processor in the system
b. more than one program in memory
c. more than one memory in the system
d. None of above
Answer
Answer: b. more than one program in memory
QN11: Processors of all computers, whether micro, mini or mainframe must have
a. ALU
b. Primary Storage
c. Control unit
d. All of above
Answer
Answer: d. All of above
QN12: What is the control unit’s function in the CPU?
a. To transfer data to primary storage
b. to store program instruction
c. to perform logic operations
d. to decode program instruction
Answer
Answer: d. to decode program instruction
QN13: What is meant by a dedicated computer?
a. which is used by one person only
b. which is assigned to one and only one task
c. which does one kind of software
d. which is meant for application software only
Answer
Answer: b. which is assigned to one and only one task
QN14: The most common addressing techiniques employed by a CPU is
a. immediate
b. direct
c. indirect
d. register
e. all of the above
Answer
Answer: e. all of the above
QN15: Pipeline implement
a. fetch instruction
b. decode instruction
c. fetch operand
d. calculate operand
e. execute instruction
f. all of above
Answer
Answer: f. all of above
QN16: Which of the following code is used in present day computing was developed
by IBM corporation?
a. ASCII
b. Hollerith Code
c. Baudot code
d. EBCDIC code
Answer
Answer: d. EBCDIC code
QN17: When a subroutine is called, the address of the instruction following the CALL instructions stored in/on the
a. stack pointer
b. accumulator
c. program counter
d. stack
Answer
Answer: d. stack
QN18: A microprogram written as string of 0’s and 1’s is a
a. symbolic microinstruction
b. binary microinstruction
c. symbolic microprogram
d. binary microprogram
Answer
Answer: d. binary microprogram
QN19: Interrupts which are initiated by an instruction are
a. internal
b. external
c. hardware
d. software
Answer
Answer: b. external
QN20: Memory access in RISC architecture is limited to instructions
a. CALL and RET
b. PUSH and POP
c. STA and LDA
d. MOV and JMP
Answer
Answer: c. STA and LDA
QN21: A collection of 8 bits is called
a. byte
b. word
c. record
Answer
Answer: a. byte
QN22: The ascending order or a data Hierarchy is
a. bit – bytes – fields – record – file – database
b. bit – bytes – record – field – file – database
c. bytes – bit- field – record – file – database
d. bytes -bit – record – field – file – database
Answer
Answer: a. bit – bytes – fields – record – file – database
QN23: How many address lines are needed to address each memory locations in a 2048 x 4 memory chip?
a. 10
b. 11
c. 8
d. 12
Answer
Answer: b. 11
QN24: A computer program that converts an entire program into machine language at one time is called a/an
a. interpreter
b. simulator
c. compiler
d. commander
Answer
Answer: c. compiler
QN25: In immediate addressing the operand is placed
a. in the CPU register
b. after OP code in the instruction
c. in memory
d. in stack
Answer
Answer: b. after OP code in the instruction
QN26: Microprocessor 8085 can address location upto
a. 32K
b. 128K
c. 64K
d. 1M
Answer
Answer: c. 64K
QN27: The ALU and control unit of most of the microcomputers are combined and manufacture on a single silicon chip. What is it called?
a. monochip
b. microprocessor
c. ALU
d. control unit
Answer
Answer: b. microprocessor
QN28: When the RET instruction at the end of subroutine is executed,
a. the information where the stack is iniatialized is transferred to the stack pointer
b. the memory address of the RET instruction is transferred to the program counter
c. two data bytes stored in the top two locations of the stack are transferred to the program counter
d. two data bytes stored in the top two locations of the stack are transferred to the stack
pointer
Answer
Answer: c. two data bytes stored in the top two locations of the stack are transferred to the program counter
QN29: A microporgram is sequencer perform the operation
a. read
b. write
c. execute
d. read and write
e. read and execute
Answer
Answer: e. read and execute
QN30: Interrupts which are initiated by an I/O drive are
a. internal
b. external
c. software
d. all of above
Answer
Answer: b. external
QN31: In half adder EX-OR gate O/P is
a. Carry
b. Remainder
c. Sum
d. None of the above
Answer
Answer: c. Sum
QN32: Half adder consist of ____ & ___ Gates.
a. EX- OR & AND
b. EX- OR & OR
c. EX- OR & NOT
d. None of the above
Answer
Answer: a. EX- OR & AND
QN33: Subtract (1010)2 from (1101)2 using 1st complement
a. (1100)2
b. (0011)2
c. (1001)2
d. (0101)2
Answer
Answer: b. (0011)2
QN34: Using 2’s Complement, subtraction, of (1010)2 from (0011)2 is
a) (0111)2
b) (1001)2
c) -(0111)2
d) -(1001)2
Answer
Answer: c) -(0111)2
QN35: Full adder is constructed by using …………….
a) Two Half Adder& one OR gate
b) two OR gate &one HA
c) One HA & two OR gate
d) One OR gate & one HA
Answer
Answer: a) Two Half Adder& one OR gate
QN36: The K-map eqn for following truth table is—–
A B YQN0: 0 0QN0: 1 0QN1: 0 1QN1: 1 1
a) AB+AB
b) ?B +AB
c) AB+ ?B
d) None of above .
Answer
Answer: c) AB+ ?B
QN37: K-map technique generally used up to ——–Variables
a) 2
b) 8
c) 7
d) 6
Answer
Answer: d) 6
QN38: What will be the hexadecimal equivalent of decimal number (54977)
a. D6C1
b.DC61
c. D6C5
d. none
Answer
Answer: a. D6C1
QN39: The address / data bus in 8085 is ____
a) Multiplexed
b)Demultiplexed
c) Decoded
d) Loaded
Answer
Answer: a) Multiplexed
QN40: A full adder:
a.) adds 2 bits fed to it
b.) adds 3 bits fed to it
c.) adds 2 bits fed to it and produces sum and carry bit
d.) adds 3 bits fed to it and produces sum and carry bit
Answer
Answer: d.) adds 3 bits fed to it and produces sum and carry bit
