1. In reverse polish notation, expression a*b+c*d is written as
Ab*cd”+
2. Simd represents an organization that_
Includes many processing units under the supervision of a common control unit
3. Floating point representation is used to store
Real integers
4. Assembly language
Uses alphabetic codes in place of binary numbers used in machine language
5. In computers, subtraction is generally carried out by
2’s complement
6. The amount of time required to read a block of data from a disk into memory is composed of seek time, rotational latency, and transfer time. Rotational latency refers to
The time its takes for the platter to make a full rotation
7. What characteristic of ram memory makes it not suitable for permanent storage?
It is volatile
8. Computers use addressing mode techniques for_
Giving programming versatility to the user by providing facilities as pointers to memory counters for loop control
To reduce no. Of bits in the field of instruction
Specifying rules for modifying or interpreting address field of the instruction
9. The circuit used to store one bit of data is known as
Flip flop
10. (2faoc) 16 is equivalent to
{001011111010 0000 1100)2
11. The average time required to reach a storage location in memory and obtain its contents is called the
Access time
12. Which of the following is not a weighted code?
Excess 3-cod
13. The idea of cache memory is based
On the property of locality of reference
14. Which of the following is lowest in memory hierarchy?
Secondary memory
15. The addressing mode used in an instruction of the form add x y, is
Index
16. If memory access takes 20 ns with cache and 110 ns with out it, then the ratio (cache uses a 10 ns memory) is
0.9
17. In a memory-mapped i/o system, which of the following will not be there?
Lda
18. In a vectored interrupt.
The interrupting source supplies the branch information to the processor through an interrupt vector.
19. Von neumann architecture is
Sisd
20. The circuit used to store one bit of data is known as
Flip flop
21. Cache memory acts between
A cpu and ram
22. Write through technique is used in which memory for updating the data
Cache memory
23. Generally dynamic ram is used as main memory in a computer system as it
Has higher speed
24. In signed-magnitude binary division, if the dividend is (11100) 2 and divisor is (10011) 2 then the result is
(10100)2
25. Virtual memory consists of
Static ram
26. In a program using subroutine call instruction, it is necessary
Clear the instruction register
27. A stack-organised computer uses instruction of
Zero addressing
28. If the main memory is of 8k bytes and the cache memory is of 2k words. It uses associative mapping. Then each word of cache memory shall be
16 bits
29. A-flip flop can be converted into t-flip flop by using additional logic circuit
N tqd =©
30. Logic x-or operation of (4aco) h & (b53f) h results
Ffff
31. When cpu is executing a program that is part of the operating system, it is said to be in
System mode
32. An n-bit microprocessor has
N-bit instruction register
33. Cache memory works on the principle of
Locality of reference
34. In computers, subtraction is carried out generally by
2’s complement method
35. Psw is saved in stack when there is a
Interrupt recognised
36. The multiplicand register & multiplier register of a hardware circuit implementing booth’s algorithm have (11101) & (1100). The result shall be
(812) 10
37. The circuit converting binary data in to decimal is
Code converter
38. A three input nor gate gives logic high output only when
All input are high
N bits in operation code imply that there are_possible distinct operators
N/2
39. Register keeps tracks of the instructions stored in program stored in memory
Pc (program counter)
40. Memory unit accessed by content is called
Associative memory
41. ‘Aging registers’ are
Counters which indicate how long ago their associated pages have been referenced.
42. The instruction ‘org o’ is a
Pseudo instruction.
43. Translation from symbolic program into binary is done in
Two passes.
44. A floating point number that has a o in the msb of mantissa is said to have
Underflow
45. The bsa instruction is
Branch and save return address
46. Logic gates with a set of input and outputs is arrangement of
Combinational circuit
47. Mimd stands for
Multiple instruction multiple data
48. A k-bit field can specify any one of
2k registers
49. The time interval between adjacent bits is called the
Bit-time
50. A group of bits that tell the computer to perform a specific operation is known as
Instruction code
51. The load instruction is mostly used to designate a transfer from memory to a processor register known as
Accumulator
52. The communication between the components in a microcomputer takes place via the address and
Data bus
53. An instruction pipeline can be implemented by means of
Fifo buffer
54. Data input command is just the opposite of a
Data output
55. A microprogram sequencer
Generates the address of next micro instruction to be executed
56. A binary digit is called a
Bit
A flip-flop is a binary cell capable of storing information of
One bit
57. The operation executed on data stored in registers is called
Micro-operation
58. Mri indicates
Memory reference instruction.
59. Self-contained sequence of instructions that performs a given computational task is called
Function
60. Microinstructions are stored in control memory groups, with each group specifying
Routine
61. An interface that provides a method for transferring binary information between internal storage and external devices is called
I/o interface
62. Status bit is also called
Flag bit
63. An address in main memory is called
Physical address
64. If the value v(x) of the target operand is ontained in the address field itself, the addressing mode is
Direct
65. Can be represented in a signed magnitude format and in a 1’s complement format
111011 & 100100
66. 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
Data transfer instructions.
67. A device/circuit that goes through a predefined sequence of states upon the application of input ulses is called
Counter
68. The performance of cache memory is frequently measured in terms of a quantity called
Latency ratio.
69. The information available in a state table may be represented graphically in a
State diagram.
70. Content of the program counter is added to the address part of the instruction in order to obtain the effective address is called.
Relative address mode.
71. An interface that provides i/o transfer of data directly to and form the memory unit and peripheral is termed as
Dma
72. The 2s compliment form (use 6 bit word) of the number 1010 is
110110
73. A register capable of shifting its binary information either to the right or to the left is called a
Shift register.
74. What is the content of stack pointer (sp)?
Address of the top element of the stack
75. Which of the following interrupt is non maskable
Trap.
76. Which of the following is a main memory
Cache memory.
77. Which of the following are not a machine instructions
Org.
End.
78. In assembly language programming, minimum number of operands required for an instruction is/are
Zero
79. The maximum addressing capacity of a microprocessor, which uses 16 bit, database
4 gb.
80. The memory unit that communicates directly with the cpu is called the
Main memory
81. The average time required to reach a storage location in memory and obtain its contents is called
Access time.
82. A byte is a group of_bits
8
83. A nibble is a group of_bits.
4
84. Register keeps track of the instructions stored in program stored in memory
Pc (program counter)
85. What does a dedicated computer mean?
Which is used by one person only
Which is assigned to one and only one task
Which does one kind of software
Which is meant for application software only
86. A development system and an are essential tools for writing large assembly
Language programs.
Microprocessor, assembler
87. In an operation performed by the alu, carry bit is set to 1 if the end carry c 8 is_. It is cleared to 0 (zero) if the carry is__.
One, zero
88. A successive aid converter is
A medium speed converter.
89. When necessary, the results are transferred from the cpu to main memory by
Shift registers.
90. A combinational logic circuit which sends data coming from a single source to two or more separate destinations is
Demultiplexer
91. In which addressing mode the operand is given explicitly in the instruction
Immediate
92. A stack organized computer has
Zero-address instruction.
93. A program counter contains a number 825 and address part of the instruction contains the number. The effective address in the relative address mode, when an instruction is read from the memory is
850
94. A page fault
Occurs when a program accesses a page not currently in main memory.
95. In a program using subroutine call instruction, it is necessary_.
Clear the instruction register
96. If the main memory is of 8k bytes and the cache memory is of 2k words. It uses associative mapping. Then each word of cache memory shall be_.
16 bits
97. A stack-organised computer uses instruction of
Zero addressing
98. In a vectored interrupt.
The interrupting source supplies the branch information to the processor through an interrupt vector.
99. In a memory-mapped i/o system, which of the following will not be there?
Lda
100. If memory access takes 20 ns with cache and 110 ns without it, then the ratio (cache uses a 10 ns memory) is_.
0.9
101. In computers, subtraction is generally carried out by_.
1’s complement
102. Assembly language_.
Uses alphabetic codes in place of binary numbers used in machine language
103. Processors of all computers, whether micro, mini or mainframe must have
Primary storage
104. Pipeline implement
Calculate operand
105. Which of the following code is used in present day computing was developed by ibm corporation?
Ebcdic code
106. When a subroutine is called, the address of the instruction following the call instructions stored in/on the
Stack
107. A microprogram written as string of o’s and 1’s is a
Binary microprogram
108. Interrupts which are initiated by an instruction are
External
109. Memory access in risc architecture is limited to instructions
Staand lda
110. A collection of lines that connects several devices is called ..
A bus
111. A complete microcomputer system consist of………..
Microprocessor
Memory
C peripheral equipment
112. Pc program counter is also called……………….
Instruction pointer
113. In a single byte how many bits will be there?
8
114. The most common addressing techniques employed by a cpu is
Register
115. The access time of memory is……………the time required for performing any single cpu operation.
A longer than
116. Memory address refers to the successive memory words and the machine is called
Word addressable
117. A microprogram written as string of o’s and 1 s is a………….
Binary microprogram
118. A pipeline is like………………..
An automobile assembly line
119. Data hazards occur when……
B pipeline changes the order of read/write access to operands
120. Where does a computer add and compare data?
Cpu chip
121. Which of the following registers is used to keep track of address of the memory location where the next instruction is located?
D program register
122. A complete microcomputer system consists of
Microprocessor
Memory
C peripheral equipment
123. Cpu does not perform the operation
B logic operation
124. Pipelining strategy is called implement
Instruction decoding
125. A stack is
An 8-bit register in the microprocessor
126. A stack pointer is
A 16-bit register in the microprocessor that indicate the beginning of the stack memory.
127. The branch logic that provides decision making capabilities in the control unit is known
C unconditional transfer
128. Interrupts which are initiated by an instruction are
Software
129. A time sharing system imply
B more than one program in memory
130. Virtual memory is –
An illusion of an extremely large memory
131. Fragmentation is –
Dividing the main memory into equal size fragments
132. Which memory unit has lowest access time?
B registers
133. Cache memory-
Faster to access than ram
134. When more than one processes are running concurrently on a system-
Multl programming system
135. Which of the following memories must be refreshed many times per second?
Static ram
136. Ram stands for
Random access memory
137. Cpu fetches the instruction from memory according to the value of
Program counter
138. A memory buffer used to accommodate a speed differential is called
Cache
139. Which one of the following is the address generated by cpu”
Logical address
140. Run time mapping from virtual to physical address is done by
Memory management unit
141. Memory management technique in which system stores and retrieves data from secondary storage for use in main memory is called
Paging
142. The address of a page table in memory is pointed by
Program counter
143. Program always deals with
Logical address
144. The access method used for magnetic tape is_
Sequential
145. The difference between memory and storage is that the memory is_and storage is
Temporary, permanent
146. Which of the following holds the rom. Cpu. Ram and expansion cards
Mother board
147. The language that the computer can understand and execute is called _
Machine language
148. Which of the following devices can be used to directly input printed text
Ocr
149. A floppy disk contains
Both circular tracks and sectors
150. Cd-rom is a
None of the above
151. Actual execution of instructions in a computer takes place in
Alu
152. Which of the following is used as a primary storage device
Prom
153. Information retrieval is faster from
Hard disk
154. Operating system is
A collection of software routines
155. Operating system
Provides a layered, user-friendly interface
156. Execution of two or more programs by a single cpu is known as
Multiprogramming
157. Modem stands for
Modulator demodulator
158. Typical data transfer rate in lan are of the order of
Mega bits per sec
159. Ethernet uses
Bus topology
160. Typical bandwidth of optical fibers is
Order of ghz
161. A large number of computers in a wide geographical area can be efficiently connected by
Communications satellites
162. Bug means
A logical error in a program
163. The part of machine level instruction, which tells the central processor what was to be done is
Operation code
164. Indicate which of the following, best describes the term software’
Systems programs only
165. A translator is best described as
A system software