50 Logic gates with a set
of input and outputs is arrangement of
(A) Combinational
circuit
(B) Logic circuit
(C) Design circuits
(D) Register
Ans: A
51. MIMD stands for
(A) Multiple instruction
multiple data
(B) Multiple instruction
memory data
(C) Memory instruction
multiple data
(D) Multiple information
memory data
Ans: A
52 A k-bit field can
specify any one of
(A) 3k registers
(B) 2k registers
(C) K2 registers
(D) K3 registers
Ans: B
53 The time interval
between adjacent bits is called the
(A) Word-time
(B) Bit-time
(C) Turn around time
(D) Slice time
Ans: B
54 A group of bits that
tell the computer to perform a specific operation is known as
(A) Instruction code
(B) Micro-operation
(C) Accumulator
(D) Register
Ans: A
55 The load instruction
is mostly used to designate a transfer from memory to a processor register
known as
(A) Accumulator
(B) Instruction Register
(C) Program counter
(D) Memory address
Register
Ans: A
56 The communication
between the components in a microcomputer takes place via the address and
(A) I/O bus
(B) Data bus
(C) Address bus
(D) Control lines
Ans: B
57 An instruction
pipeline can be implemented by means of
(A) LIFO buffer
(B) FIFO buffer
(C) Stack
(D) None of the above
Ans: B
58 Data input command is
just the opposite of a
(A) Test command
(B) Control command
(C) Data output
(D) Data channel
Ans: C
59 A microprogram
sequencer
(A) generates the
address of next micro instruction to be executed.
(B) generates the
control signals to execute a microinstruction.
(C) sequentially
averages all microinstructions in the control memory.
(D) enables the
efficient handling of a micro program subroutine.
Ans: A
60 . A binary digit is
called a
(A) Bit
(B) Byte
(C) Number
(D) Character
Ans: A
61 A flip-flop is a
binary cell capable of storing information of
(A) One bit
(B) Byte
(C) Zero bit
(D) Eight bit
Ans: A
62 The operation
executed on data stored in registers is called
(A) Macro-operation
(B) Micro-operation
(C) Bit-operation
(D) Byte-operation
Ans: B
63 MRI indicates
(A) Memory Reference
Information.
(B) Memory Reference
Instruction.
(C) Memory Registers
Instruction.
(D) Memory Register
information
Ans: B
64 Self-contained
sequence of instructions that performs a given computational task is called
(A) Function
(B) Procedure
(C) Subroutine
(D) Routine
Ans: A
65 Microinstructions are
stored in control memory groups, with each group specifying a
(A) Routine
(B) Subroutine
(C) Vector
(D) Address
Ans: A
66 An interface that
provides a method for transferring binary information between internal storage
and external devices is called
(A) I/O interface
(B) Input interface
(C) Output interface
(D) I/O bus
Ans: A
67 Status bit is also
called
(A) Binary bit
(B) Flag bit
(C) Signed bit
(D) Unsigned bit
Ans: B
68 An address in main
memory is called
(A) Physical address
(B) Logical address
(C) Memory address
(D) Word address
Ans: A
69 If the value V(x) of
the target operand is contained in the address field itself, the addressing
mode is
(A) immediate.
(B) direct.
(C) indirect.
(D) implied.
Ans: B
70 can be represented in
a signed magnitude format and in a 1’s complement format as
(A) 111011 & 100100
(B) 100100 & 111011
(C) 011011 & 100100
(D) 100100 & 011011
Ans: A
71 The instructions
which copy information from one location to another either in the processor’s
internal register set or in the external main memory are called
(A) Data transfer
instructions.
(B) Program control instructions.
(C) Input-output
instructions.
(D) Logical
instructions.
Ans: A
72 A device/circuit that
goes through a predefined sequence of states upon the application of input
pulses is called
(A) register
(B) flip-flop
(C) transistor.
(D) counter.
Ans: D
73. The performance of
cache memory is frequently measured in terms of a quantity called
(A) Miss ratio.
(B) Hit ratio.
(C) Latency ratio.
(D) Read ratio.
Ans: C
74. The information
available in a state table may be represented graphically in a
(A) simple diagram.
(B) state diagram.
(C) complex diagram.
(D) data flow diagram.
Ans: B
75 Content of the
program counter is added to the address part of the instruction in order to
obtain the effective address is called.
(A) relative address mode.
(B) index addressing
mode.
(C) register mode.
(D) implied mode.
Ans: A
76 An interface that
provides I/O transfer of data directly to and form the memory unit and
peripheral is termed as
(A) DDA.
(B) Serial interface.
(C) BR.
(D) DMA.
Ans: D
77 The 2s compliment
form (Use 6 bit word) of the number 1010 is
(A) 111100.
(B) 110110.
(C) 110111.
(D) 1011.
Ans: B
78 A register capable of
shifting its binary information either to the right or the left is called a
(A) parallel register.
(B) serial register.
(C) shift register.
(D) storage register.
Ans: C
79 What is the content
of Stack Pointer (SP)?
(A) Address of the
current instruction
(B) Address of the next
instruction
(C) Address of the top
element of the stack
(D) Size of the stack.
Ans: C
80 Which of the
following interrupt is non maskable
(A) INTR.
(B) RST 7.5.
(C) RST 6.5.
(D) TRAP.
Ans: D
81 Which of the
following is a main memory
(A) Secondary memory.
(B) Auxiliary memory.
(C) Cache memory.
(D) Virtual memory.
Ans: C
82 Which of the
following are not a machine instructions
(A) MOV.
(B) ORG.
(C) END.
(D) (B) & (C) .
Ans: D
83 In Assembly language
programming, minimum number of operands required for an instruction is/are
(A) Zero.
(B) One.
(C) Two.
(D) Both (B) & (C) .
Ans: A
84 The maximum
addressing capacity of a micro processor which uses 16 bit database & 32
bit address base is
(A) 64 K.
(B) 4 GB.
(C) both (A) & (B) .
(D) None of these.
Ans: B
85 The memory unit that
communicates directly with the CPU is called the
(A) main memory
(B) Secondary memory
(C) shared memory
(D) auxiliary memory.
Ans: A
86 The average time
required to reach a storage location in memory and obtain its contents is
called
(A) Latency time.
(B) Access time.
(C) Turnaround time.
(D) Response time.
Ans: B
87. A memory buffer used
to accommodate a speed differential is called
A. stack pointer
B. cache
C. accumulator
D. disk buffer
Answer: B
88. Which one of the
following is the address generated by CPU?
A. physical address
B. absolute address
C. logical address
D. none of the mentioned
Answer: C
89. Run time mapping
from virtual to physical address is done by
A. memory management
unit
B. CPU
C. PCI
D. none of the mentioned
Answer: A
90. Memory management
technique in which system stores and retrieves data from secondary storage for
use in main memory is
called
A. fragmentation
B. paging
C. mapping
D. none of the mentioned
Answer: B
91. The address of a
page table in memory is pointed by
A. stack pointer
B. page table base
register
C. page register
D. program counter
92. Program always deals
with
A. logical address
B. absolute address
C. physical address
D. relative address
Answer: A
93 A successive A/D
converter is
(A) a high-speed
converter.
(B) a low speed
converter.
(C) a medium speed
converter.
(D) none of these.
Ans: C
94 When necessary, the
results are transferred from the CPU to main memory by
(A) I/O devices.
(B) CPU.
(C) shift registers.
(D) none of these.
Ans: C
96 A combinational logic
circuit which sends data coming from a single source to two or more separate
destinations is
(A) Decoder.
(B) Encoder.
(C) Multiplexer.
(D) Demultiplexer.
Ans: D
97 In which addressing
mode the operand is given explicitly in the instruction
(A) Absolute.
(B) Immediate .
(C) Indirect.
(D) Direct.
Ans: B
98 A stack organized
computer has
(A) Three-address
Instruction.
(B) Two-address
Instruction.
(C) One-address
Instruction.
(D) Zero-address
Instruction.
Ans: D
99 A Program Counter
contains a number 825 and address part of the instruction contains the number
24.
The effective address in the relative address mode,
when an instruction is read from the memory is
(A) 849.
(B) 850.
(C) 801.
(D) 802.
Ans: B
102 A page fault
(A) Occurs when there is
an error in a specific page.
(B) Occurs when a
program accesses a page of main memory.
(C) Occurs when a
program accesses a page not currently in main memory.
(D) Occurs when a
program accesses a page belonging to another program.
Ans: C
103. The load
instruction is mostly used to designate a transfer from memory to a processor
register known as____.
A. Accumulator
B. Instruction Register
C. Program counter
D. Memory address
Register
Ans: A
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