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WorksheetsCOA
Total questions: 20
Worksheet time: 16mins
Operating System is a special case of
Hardware System
Application system
system software
users
Which is the fastest component in the memory hierarchy?
main memory
auxiliary memory
cache memory
none of the above
The input or output devices attached to the computer are also called
Electromechanical devices
Electromagnetic devices
Peripheral devices
Electronic devices
Which register is used to
Holds the memory address about to be used by the CPU
MAR
MDR
ACCUMULATOR
PROGRAM COUNTER
Which register is being described?
Holds the data / instructions that have been fetched from memory
MAR
MDR
ACCUMULATOR
PROGRAM COUNTER
Perform binary addition of 1101 + 0010 is ________
1110
1111
0111
1,1101
The result of 0*1 in binary is ____________
0
1
invalid
10
Express the decimal format of the signed binary number (101010)2
10
12
-10
-12
>> operator is used to denote _________
left shift
right shift
less than
greater than
The subtraction using 1’s complement of 110 – 100 will give the result ___________
-011
011
010
-010
These devices provide a means of communication between a computer and outer world.
I/O
Storage
Compact
Drivers
ALU is the place where the actual executions of instructions take place during the processing operation.
TRUE
FALSE
Number of bits in ALU is _________
4
8
16
2
A __________ gate gives the output as 1 only if all the inputs signals are 1.
AND
OR
EXOR
NOR
The boolean expression of an EXOR gate is _______
A.B
A’B+AB’
A+B
A’B’
The main advantage of multiple bus organisation over a single bus is _____
Reduction in the number of cycles for execution
Increase in size of the registers
Better Connectivity
None of the mentioned
Arithmetic shift left operations
causes the sign bit to remain same
produces same result as obtained with logical shift left operation
is not applicable for signed 2's complement
none of the above
If a register containing data (11001100)2 is subjected to arithmetic shift left operation, then the content of the register after 'ashl' shall be
(11001100)2
(1101100)2
(10011001)2
(10011000)2
Negative numbers cannot be represented in
Signed magnitude form
1's complement form
2's complement form
8-4-2-1 code
Which of the following statements is true ?
ROM is a Read only memory
PC points to the last instruction that was executed
Stack works on the principle of FIFO
none of the above
