computer architecture mcq with answers

Questions 111 To 120

111.	What is represented by D7I'T in the instruction cycle? (a) Register – Reference Instructions (b) Program Interrupt (c) Input-Output Instructions (d) Branch Instruction (e) Memory Reference Instructions.
112.	What is the (r-1)’s complement of 345 in octal number system? (a) 342 (b) 234 (c) 243 (d) 432 (e) 423.
113.	What is described by the Mnemonic SHRA? (a) Arithmetic shift left (b) Logical shift right (c) Logical shift left (d) Circular shift right (e) Arithmetic shift right.
114.	Which of the following terms describe that the information which will be used in near future is likely to be in use already? (a) Spatial Locality (b) Locality (c) Hit ratio (d) Temporal Locality (e) Effective access time.
115.	CISC stands for (a) Control Instruction Set Completeness (b) Complex Instruction Set Conversion (c) Complex Instruction Set Computer (d) Control Instruction Set Computer (e) Complex Instruction Set Control.
116.	What are the three state gates in a digital circuit? (a) Logic 0, Logic 1 Complement, High Impedance (b) Logic 0 Complement,  Logic 1, High Impedance (c) Logic 0 Complement, Logic 1 Complement, High Impedance (d) Logic 0, Logic 1, Low Impedance (e) Logic 0, Logic 1, High Impedance.
117.	What is the table that lists the required inputs for a given change of state? (a) Characteristic table (b) Truth table (c) Null table (d) Excitation table (e) Binary table.
118.	Microphone is a/an (a) Output device (b) Storage device (c) Input device (d) Processing device (e) Printing device.
119.	Of the following phases, identify the phase in which the programs must reside in the main memory. (a) Deletion (b) Execution (c) Printing     (d) Reading (e) Insertion.
120.	(x')'=_____                                                                                                                                                             (a) x2 (b) 0 (c) 1 (d) x (e) x'.

Answers

111.	Answer :       (a) Reason:  D7I'T  in the instruction cycle represents Register –reference instructions.
112.	Answer :       (d) Reason:  (r-1)’s complement of 345 in octal number system is 432.
113.	Answer :       (e) Reason:  SHRA  stands for Arithmetic shift right.
114.	Answer :       (d) Reason:  Temporal Locality describe that the information which will be used in near future is likely to be in use already.
115.	Answer :       (c) Reason:  CISC stands for Complex Instruction Set Computer.
116.	Answer :       (e) Reason:  The three state gates in a digital circuit Logic 0, logic 1, high impedance
117.	Answer :       (d) Reason:  The table that lists the required inputs for a given change of state is Excitation Table.
118.	Answer :       (c) Reason:  Microphone is a Input device.
119.	Answer :       (b) Reason:  Execution is the phase in which the programs must reside in the main memory.
120.	Answer :       (d) Reason:  (x')' = x.

 

Questions 121 To 130

121.	Of the following, what is a input device for which finger shows the cursor movement. (a) Mouse (b) Scanner (c) Trackball (d) Glide pad (e) Microphone.
122.	Which of the following describes the Mnemonic SPA? (a) Skip If (Accumulator) Positive (b) Skip If (Adder-Subtractor) Positive (c) Skip If (Associative Mapping) Positive (d) Skip If (Assembler) Positive (e) Skip If (Address Resister) Positive.
123.	Of the following, identify the memory usually written by the manufacturer. (a) RAM (b) ROM (c) DRAM (d) SRAM (e) Cache Memory.
124.	Consider that the program is executed from main memory until it attempts to reference a page that is still in auxiliary memory. Identify this condition. (a) Page Found (b) Page Fault (c) Page Hit (d) Page Miss (e) Page Replace.
125.	What is the symbol to represent a state in the state diagram?
126.	A computer has memory of 256k words of 32 bits each, how many bits are required to specify the address part? (a) 16 bits (b) 12 bits (c)   8 bits (d) 18 bits (e) 10 bits.
127.	V is a symbol for (a) OR (b) XOR (c) AND (d) NAND (e) NOR.
128.	What is represented by D7I’T in the instruction cycle? (a) Input-Output Instructions (b) Register–reference instructions (c) Program interrupt (d) Branch instruction (e) Memory Reference Instructions.
129.	What is described by the Mnemonic SHRA? (a) Arithmetic shift left (b) Logical shift right (c) Logical shift left (d) Arithmetic shift right (e) Circular shift right.
130.	CISC stands for: (a) Control Instruction Set Completeness (b) Complex Instruction Set Computer (c) Complex Instruction Set Conversion (d) Control Instruction Set Computer (e) Complex Instruction Set Control.

Answers

	Answer	Reason
121.	D	Is the input device for which finger shows the cursor movement
122.	A	SPA stands for Skip If (Accumulator) Positive
123.	B	ROM is the memory usually written by the manufacturer.
124.	B	The program is executed from main memory until it attempts to reference a page that is still in auxiliary memory called Page Fault.
125.	B	is the symbol which represent a state in the state diagram
126.	A	A computer has memory of 256k words of 32 bits each, 18 bits are required to specify the address part.
127.	A	V  is a symbol for OR
128.	B	D7I’T  in the instruction cycle represents Register –reference instructions
129.	D	SHRA stands for Arithmetic shift right
130.	B	CISC stands for complex instruction set computer.

Questions 131 To 140

131.	Of the following phases, Identify the phase in which the programs must reside in the main memory. (a) Deletion (b) Printing (c) Execution (d) Reading (e) Insertion.
132.	What are the three state gates in a digital circuit? (a) Logic 0, Logic 1 Complement, high impedance (b) Logic 0 Complement, Logic 1, high impedance (c) Logic 0 Complement, Logic 1 Complement, high impedance (d) Logic 0, logic 1, Low impedance (e) Logic 0, logic 1, high impedance.
133.	Which of the following is false related to Stack? (a) Stack Pointer Points to the top most element of the stack (b) Only PUSH and POP operations are applicable (c) Implements FIFO (d) Useful for nested loops, subroutine calls etc., (e) Efficient for arithmetic expression evaluation.
134.	Which of the following is the method in which the unit receiving the data responds with another control signal? (a) Timing Sequence (b) Synchronous (c) Strobe (d) Short message service (e) Handshaking.
135.	Consider the following unsigned  decimal numbers i.       6543 ii.      4444 Subtract (i) by taking the 10's complement of (ii) (a) 2098 (b) 2099 (c) 2096 (d) 2097 (e) 2095.
136.	(x’)’ = (a) x2 (b) 0 (c) 1 (d) x (e) x’.
137.	Which of the following addressing modes specifies a register which contains the memory address of the operand? (a) Indirect Addressing Mode (b) Register Addressing Mode (c) Register Indirect Addressing Mode (d) Index Addressing  Mode (e) Base Address Register Addressing Mode.
138.	What is the octal equivalent of given binary number? 011001 (a) 32 (b) 31 (c) 34 (d) 33 (e) 35.
139.	Which of the following is correct related to the circuit diagrams? (a) Sequential circuit is an interconnection of only logic gates (b) Sequential circuit is an interconnection of only flip flops (c) Combinational circuit is an interconnection of  logic gates (d) Combinational circuit is an interconnection of flip flops (e) Part of a combinational circuit is a sequential circuit.
140.	What does D stands for in D-flip flop? (a) Direct (b) Don’t care (c) Double (d) Delay (e) Data.

Answers

131.	C	Is the phase in which the programs must reside in the main memory.
132.	E	Is the three state gates in a digital circuit
133.	C	Stack does not Implement FIFO but implements LIFO
134.	E	Hand shaking is the method in which the unit receiving the data responds with another control signal
135.	B	6543- 4444= 2099
136.	D	(x’)’ = x
137.	C	Register indirect addressing mode. Is the addressing mode that specifies a register which contains the memory address of the operand
138.	B	The octal equivalent of 011001 =31
139.	C	Combinational circuit is an interconnection of logic gates.
140.	E	D stands in D-flip flop stands for Data

Questions 141 To 150

141.	Identify the term, which indicate a set of Logical Addresses. (a) Memory space (b) Disk space (c) Address space (d) Location (e) Page Frame.
142.	DMA stands for: (a) Direct Memory Address (b) Direct Main Address (c) Direct Memory Access (d) Direct Main Access (e) Device Memory Access.
143.	Consider DR ← M [AR], Identify the operation. (a) Arithmetic Operation (b) Shift Operation (c) Memory Write (d) Memory Read (e) Memory Cycle.
144.	What is the (r-1)’s complement of 345 in octal number system? (a) 342 (b) 234 (c) 243 (d) 423 (e) 432.
145.	Which of the following terms describe that the information which will be used in near future is likely to be in use already? (a) Spatial Locality (b) Locality (c) Hit ratio (d) Temporal Locality (e) Effective access time.
146.	What is the table that lists the required inputs for a given change of state? (a) Characteristic table (b) Truth table (c) Null table (d) Excitation table (e) Binary table.
147.	Microphone is a\an (a) Output device (b) Storage device (c) Input device (d) Processing device (e) Printing device.
148.	What is the operation sets to 1 the bits in one register where there are corresponding 1’s in the second register? (a) Selective Complement (b) Selective Clear (c) Selective Set (d) Mask (e) Insert.
149.	Which one of the following can be called as a peripheral? (a) Control unit (b) Speakers (c) Arithmetic Unit (d) Logic unit (e) Main Memory.
150.	What is demonstrated in the given figure? (a) MICR (b) Bar Code Reader (c) Joy Stick (d) Track Ball (e) Wand Reader.

Answers

141.	C	Address spaces  Indicate a set of Logical Addresses.
142.	C	DMA stands for Direct Memory Access
143.	D	DR ← M [AR] is Memory Read
144.	E	(r-1)’s complement of 345 in octal number system is 432
145.	D	Temporal Locality describe that the information which will be used in near future is likely to be in use already.
146.	D	Excitation table is the table that lists the required inputs for a given change of state
147.	C	Microphone is a Input device
148.	C	Selective Set is the operation sets to 1 the bits in one register where there are corresponding 1’s in the second register
149.	B	Speakers can be called as a peripheral.
150.	B	Bar code reader.