List of top Computer Organization and Architecture Questions

The values of x and y, if (x 567)₈+ (2yx5)₈ = (71yx)₈

When even parity ASCII text is transmitted asynchronously at a rate of 10 characters per sec. over a 110-bps line, what percentage of the received bits actually contain data

MS Access is a

Match List-I and List-II

LIST I		LIST II
A.	Dynamic RAM	I.	Know as non-volatile memory and can be programmed
B.	PROM	II.	non-volatile and Random access digital Data storage device
C.	HDD	III.	is made up of memory cells where each cell is composed of one capacitor and one transistor
D.	Static Ram	IV.	It remains the data as long as power is provided to the memory chip.

Choose the correct answer from the options given below:

In a memory mapped I/O system, which of the following will not be there?

Match List-I and List-II

LIST I		LIST II
A.	Binary coded Decimal	I.	4 bits are used to represent each digit
B.	ASCII	II.	Characters are represented by eight bits
C.	EBCDIC	III.	Character set supports Japanese and Chinese fonts
D.	UNICODE	IV.	Standard character codes used to store data

Choose the correct answer from the options given below:

Match List-I and List-II

LIST I		LIST II
A.	(123)s	I.	(0001 1111 1100)2
B.	(IFC)16	II.	(0011001)2
C.	(25)10	III.	(0001 0010 0011)2
D.	(123)16	IV.	(001 010 011)2

Choose the correct answer from the options given below:

Which of the following binary numbers are divisible by 4?
(A) 10101010101010
(B) 1110001110001
(C) 11001010100
(D) 1111000011
(E) 10010 1100

Given below are two statements:
Statement I: Cache memory is a very high speed memory placed in between CPU and Hard Disk.
Statement II: One major advantage of virtual memory is that programs can be larger than main memory.
In the light of the above Statements, choose the most appropriate answer from the options given below :

Given below are two statements:
Statement I: In order to reset carry without affecting accumulator content, one has to use ORAA.
Statement II: Octal code is minimal error code.
In the light of the above Statements, choose the most appropriate answer from the options given below :

Given below are two statements:
Statement I: 011010 is 2's complement representation of -37.
Statement II: (211)_s is octal representation of 137.
In the light of the above Statements, choose the most appropriate answer from the options given below :

During the execution of an instruction in a processor
(A) Program Counter (PC) is used to hold the address of next instruction to be executed.
(B) Instruction Register (IR) hold the instruction to be executed.
(C) Memory Address Register (MAR) is used to perform address translation.
(D) Data Register (DR) is used to perform operation on the data.
(E) Clock generates necessary control signals
Choose the correct answer from the options given below:

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): RAM is a volatile memory.
Reasons (R): The content of RAM get vanished as soon as power is off.
In the light of the above Statements, choose the correct answer from the options given below:

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): Interrupt service routine are generally executed by CPU to handles an interrupt.
Reasons (R): CPU handles an interrupt by checking the interrupt register at fixed time intervals.
In the light of the above Statements, choose the correct answer from the options given below:

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): Gray code easy to use in counter.
Reasons (R): Counter is a register, which is made of flip flops.
In the light of the above Statements, choose the most appropriate answer from the options given below :

Consider the unsigned 8-bit fixed point binary number representation below,
b₇ b₆ b₅ b₄ b₃. b₂ b₁ b₀
The position of binary point is between b₂ and b₃ which of the following can be represented exactly in the above representation.

A memory system with 32-bit virtual addresses uses 4KB pages and a 128MB byte-addressable main memory. What is the size of physical address space in pages?

Which of the following facilitates transfer of bulk data from hard disk to main memory with the highest throughput?

Let the page fault service time be 10 ms in a computer with average memory access time being 20 ns. If one page fault is generated for every 106 memory access, what is the effective access time for the memory?

Which of the following is not a role of Input/output controller?

Which of the following mode permits relocation without any change in the code

Match List I with List II

	List I		List II
	Implied Addressing Mode		Megabytes
	Terabyte		1024*1024 Petabytes
	Gigabyte		1024*1024 Megabytes
	Petabyte		1024 Terabytes

Choose the correct answer from the options given below:

Which of the following is true about RARP

Instruction format has the following structure.Instruction number OPCODE destination Source \(1\) and Source \(2\).
\(I_1:\) Div \(R_3 R_1 R_2;\)
\(I_2:\) Sub \(R_5 R_3 R_4;\)
\(I_3:\) Add \(R_3 R_5 R_6;\)
\(I_4:\) Mul \(R_7 R_3 R_8;\)