COA Objective Question solution 2019 ODD
(i) Dynamic RAM consumes ..... .......... power and. then the static RAM.? (a) More,
Faster (b) More,
Slower (c) Less,
Slower (d) Less, Faster Answer :(c)
(ii) Which flag of the 8085's flag register is not 
accessible
to programmer directly?(a)
Zero flag(b) Carry
flag(c) Auxiliary
carry flag(d) Parity
flag
accessible
to programmer directly?Answer :(c)
(iii) Cache memory works on the principle of (a) Locality
of reference (b) Locality
of data (c) Locality
of memory (d) Locality
of reference & memory Answer :(a)
(iv) Which of the memory holds the information when the power supply is
switched off? (a) Dynamic RAM (b) Static
RAM (c) EEROM (d) None
of the above Answer :(c)
(v)Which of the following interrupt is remarkable? (a) INTR (b) RST 7.5 (c) TRAP (d) Both
(a) and (b)
(vi) Cycle stealing technique is used in
(a) Interrupt based data transfer
(b) DMA
based data transfer (c) Polled
mode data transfer (d)All the above Answer :(b)
(vii) Which of the following is not a characteristic of a RISC architect
(a) Large Instruction Set
(b) One
Instruction Per Cycle
(c) Simple Addressing Modes
(d) Register-to-Register Operation
Answer :(a)
(viii) Associative memory is some times called
as
(a) Content Addressable Memory(b) Cache
Memory(c) Main
Memory(d) Virtual
Memory
Answer :(a)
(ix)Floating-point representation is used to store(a) Integers(b) Whole
numbers(c) Real
Integers
Answer :(c)
(x) What characteristics of RAM memory make it not
suitable for permanent storage?(a) Too
bulky(b) Unreliable(c) Too
slow(d) It
is volatile Answer :(d)
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(xi) An instruction code is
(a) An the output of a program
(b) A
group of bits that instruct the computer to perform a specific operation
(c) the digital circuit that instructs the computer to perform a specific operation
(d) None of the
above
Answer :(b)
(xii)The program counter (PC) holds the address of(a) The
instruction is being executed(b) The
next instruction to be read from memory(c) The
operands(d) None
of these
Answer :(a)
(xiii)The function of the control unit in digital
computer is(a) To
initiate sequence of micro-operations(b) To
initiate the execution of a program(c) To
stop the execution of a program(d) To
shutdown the computer
Answer :(a)
(xiv)A memory that is the part of a Control unit is known as
(a) Internal Memory(b) External
Memory(c) Command
Memory(d) Control
Memory
(xv) A group of eight bits is known as(a) Nibble(b) A byte(c) An Octet(d) Both (b)
and (c)
Answer :(b)
(xvi)The tendency of a processor to access the same set of memory locations repetitively over a short period of time is known as. (
(a)
Local effect(b) Locality
of reference(c) Frame
of reference(d) All
of the above
Answer :(b)
(xvii) The CPU state is saved in the event of a
transfer control-(a) From
one instruction to a non-sequential instruction of a program(b) From
our program to another
(c) During
execution of instruction due to an interrupt cycle(d) None
of the above statement is true
(xviii) A computer uses RAM chips of 1024 x I capacity.
How many chips are needed to provide a memory capacity of 16 k bytes?(a) 16(b) 128(c) 32(d) None of
these
(xix) Booth's algorithm is used for:(a) Division(b) Multiplication(c) Subtraction(d) Division
and Multiplication
Answer :(b)
(xx)The
instruction that does not need any address field is:(a) Three
address instructions(b) Two
address instructions(c) One
address instructions(d) Zero
address instruction
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