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NIMCET Previous Year Questions (PYQs)

NIMCET Computer PYQ

NIMCET PYQ
If we can generate a maximum of 4 Boolean functions using n Boolean variables, what will be minimum value of n?

NIMCET PREVIOUS YEAR QUESTION

NIMCET Computer PYQNIMCET Boolean algebra PYQ

Solution

NIMCET PYQ
The Process when processor fetch or decode another instruction during the execution of current instruction is called

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Solution

Pipelining is the process of accumulating instruction from the processor through a pipeline. It allows storing and executing instructions in an orderly process. It is also known as pipeline processing. Pipelining is a technique where multiple instructions are overlapped during execution.

NIMCET PYQ
Which of the following is used by ALU to store the intermediate results?

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Solution

An accumulator is a type of register included in a CPU. It acts as a temporary storage location which holds an intermediate value in mathematical and logical calculations. Intermediate results of an operation are progressively written to the accumulator, overwriting the previous value. For example, in the operation "3 + 4 + 5," the accumulator would hold the value 3, then the value 7, then the value 12. The benefit of an accumulator is that it does not need to be explicitly referenced, which conserves data in the operation statement.

NIMCET PYQ
One TeraByte(TB)=_________GB and One ExaByte(EB)=_______GB

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Solution

UnitShortenedCapacity
Bitb1 or 0 (on or off)
ByteB8 bits
KilobyteKB1024 bytes
MegabyteMB1024 kilobytes
GigabyteGB1024 megabytes
TerabyteTB1024 gigabytes
PetabytePB1024 terabytes
ExabyteEB1024 petabytes
ZettabyteZB1024 exabytes
YottabyteYB1024 zettabytes

NIMCET PYQ
The Cache Memory is  more effective because of

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Solution

Locality of reference refers to a phenomenon in which a computer program tends to access same set of memory locations for a particular time period. In other words, Locality of Reference refers to the tendency of the computer program to access instructions whose addresses are near one another.

NIMCET PYQ
Which of the following is the fastest means of memory access for CPU?

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Solution

Registers are a type of computer memory used to quickly accept, store, and transfer data and instructions that are being used immediately by the CPU. The registers used by the CPU are often termed as Processor registers.

NIMCET PYQ
The number (2217)8 is equivalent to

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Solution

(2217)8 =(010010001111)8
Pair of 4 Bits
1111= F
1000=8
0100=4
(010010001111)=(48F)16

NIMCET PYQ
To fetch data from secondary memory which one of the following register is used

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Solution

MAR register is used to access data and instructions from memory during the execution phase of instruction. MAR holds the memory location of data that needs to be accessed. When reading from memory, data addressed by MAR is fed into the MDR (memory data register) and then used by the CPU. When writing to memory, the CPU writes data from MDR to the memory location whose address is stored in MAR. MAR, which is found inside the CPU, goes either to the RAM (random-access memory) or cache.

NIMCET PYQ
The binary multiplication 00*11 will give

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Solution

0*3=0

NIMCET PYQ
Consider a computer system with speed of 106  instructions per second. A program P, having 2n2  steps is run on this system, where n is the input size. If n = 10000, what is the execution time for P?

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Solution

$\text{Speed of computer} = 10^6 \text{per second}$
$\text{For n} =10000=10^4$
$$Time = \frac{\text{No of tasks}}{\text{Speed of computer}}$$
$$Time = \frac{2n^2}{10^6}$$
$$= \frac{2\times (10^4)^2}{10^6}$$
$$= \frac{2\times 10^8}{10^6}$$
$$=2 \times 10^2$$
$$= 200sec$$

NIMCET PYQ
To access the I/O devices the status flags is continuously checked in

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Solution

Programmed I/O: In program-controlled I/O, the processor program controls the complete data transfer. So only when an I/O transfer instruction is executed, the transfer could take place. It is required to check that device is ready/not for the data transfer in most cases.  Usually, the transfer is to & from a CPU register & peripheral. Here, CPU constantly monitors the peripheral. Here, until the I/O unit indicates that it is ready for transfer, the CPU wait & stays in a loop. It is time-consuming as it keeps the CPU busy needlessly.

NIMCET PYQ
Which one of the following Boolean algebraic rule is correct?

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Solution

A + A'B = (A + A') . (A + B)
=  1 . (A + B)
= A + B

NIMCET PYQ
The representation of a floating point binary number +1001.11 in 8 bit fraction and 6 bit exponent format is

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Solution

NIMCET PYQ
Which term is redundant in the expression AB + A'C + BC ?

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Solution

NIMCET PYQ
Let the memory access time is 10 miliseconds and cache hit ratio 15%. The effective memory access time is

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Solution

NIMCET PYQ
Which of the following is the representation of decimal number (- 147) in 2's compliment notation on a 12-bit machine?

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Solution

NIMCET PYQ
The first instruction of bootstrap loader program of an operating system is stored in

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Solution

NIMCET PYQ
Consider the equation (40)x = (132)y is some bases x and y. Then a possible set of value of x and y are

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Solution

$\begin{array}{ll}{{{(40})}_x={{(132)}}_y} \\ {\Rightarrow4\times{x}^1}+0\times{x}^0=1\times{y}^2+3\times{y}^1+2\times{y}^0 \\ {\Rightarrow4x+0={y}^2+3y^{}+2} \\ {4x={y}^2+3y^{}+2}\end{array}$

NIMCET PYQ
The smallest integer that can be represented by an 8 bit number in 2's complement form is

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Solution

NIMCET PYQ
Which of the following in a functionally complete set of gates?
I. NAND                  II. NOR

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Solution

NIMCET PYQ
The total number binary function that can be defined using n Boolean variables is

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Solution

NIMCET PYQ
Assume x' represents negation of x the Boolean function x'y' + xy + x'y is equivalent to?

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Solution

NIMCET PYQ
The memory unit which directly communicates with the CPU is known as

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Solution

NIMCET PYQ
Dynamic RAM consumes……. Power and ……than Static RAM

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Solution

NIMCET PYQ
The binary equivalent of (234.125)10?

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Solution

NIMCET PYQ
Determine the octal equivalent of (432267)10?

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Solution

NIMCET PYQ
One Exabyte is equal to …

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Solution

NIMCET PYQ
Consider the following circuit.

How many minimum numbers of two input NAND gates are required to design the above circuit?

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Solution

NIMCET PYQ
The time required for fetching and execution of one simple machine instruction is known as

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Solution

NIMCET PYQ
The equivalence of given expression x+x'y with Boolean theorem is….

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Solution

x+x'y
=(x+x')(x+y)
=(x+y)

NIMCET PYQ
The logic XOR operation of (4AC0)16 and (B53F)16 results

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Solution

NIMCET PYQ
The maximum and minimum value represented in signed 16-bit 2s compliment representation are

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Solution

NIMCET PYQ
Which of the following is true about Von Neumann architecture?

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Solution

NIMCET PYQ
Equivalent of the decimal number (25.375)10 in  binary form

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Solution

NIMCET PYQ
Consider the following minterm for F:F(P, Q, R, S) = Σ0, 2, 5, 7, 8, 10, 13, 15. The minterms 2, 7, 8, and 13 are don't care terms. The minimal sum of products form for F is

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Solution

NIMCET PYQ
Suppose we have a 10-bit computer that uses 10-bit int (2's complement representation). the number representation of - 35 is

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Solution

NIMCET PYQ
A wrong sentence related to FAT 32 and NTFS file systems is

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Solution

NIMCET PYQ
A bulb in the staircase has two switches, one switch is at the ground floor and the other one is at the first floor. The bulb can be turned ON and also can be turned OFF by any of the switches irrespective of the state of the other switch. The logic of the switching of the bulb resembles

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Solution

NIMCET PYQ
Suppose we have a 10-bit computer that uses 10-bit floating point computational unit (Float number uses IEEE floating-point arithmetic where a floating point number has 1 sign bit, 5 exponent bits, and 4 fraction bits). The representation for +∞ (plus infinity) is

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Solution

NIMCET PYQ
Cosider the following Boolean Expression for F:
$F(P,Q,R,S)=PQ+\overline{P}QR+\overline{P}Q\overline{R}S$ .
The minimum sum of products form of F is

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Solution

NIMCET PYQ
What is the name of the storage device that compensates the difference in rates of flow of data from one device to another?

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Solution

NIMCET PYQ
If a processor clock is rated as million cycles per second, then its clock perios is:

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Solution

NIMCET PYQ
A CPU generates 32-bit virtual addresses. The page size is 4 KB. The processor has a translation look-aside buffer (TLB) which can hold a total of 128 page table entries and is 4 -way set associative. The minimum size of the TLB tag is:

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Solution

NIMCET PYQ
The number of minterms in a $n$ variable truth tableis

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Solution

NIMCET PYQ
Let $\oplus$ and $\odot$ denote the Exclusive - OR and Exclusive-NOR operations respectively. Which of the following is not correct?

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Solution

NIMCET PYQ
Which of the following registers is used to keep track of address of the memory location where the next instruction is located?

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Solution

NIMCET PYQ
The time required for fetching and execution of one machine instruction is:

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Solution

NIMCET PYQ
Consider the circuit shown below and find minimum number of NAND gates required to design it.

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Solution

NIMCET PYQ
How many 32K $\times$ 1 RAM chips are needed to provide a memory capacity of 256K bytes?

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Solution

NIMCET PYQ
What is a potential problem of 1’s complement representation of numbers?

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Solution

NIMCET PYQ
The reduced form of the Boolean function $F=xyz+xyz^{\prime}^{}+x^{\prime}yz+xy^{\prime}z$ is

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Solution

NIMCET PYQ
In IEEE single precision floating point representation, exponent is represented in ______

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Solution

NIMCET PYQ
With 4-bit 2's complement arithmetic, which of the following addition will result in overflow?

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Solution

NIMCET PYQ
If the 2's complement representation of a number is (011010)2 , what is its equivalent hexadecimal representation?

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Solution

NIMCET PYQ
For the circuit shown below, the complement of the output F is _________

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Solution

NIMCET PYQ
If N is a 16-bit signed integer, then 2's complement representation of N is (F87B)16. The 2's complement representation of 8*N is

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Solution

NIMCET PYQ
The base ( or radix) of the number system such that the following equation holds 312/20 = 131.1 is

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Solution

NIMCET PYQ
Which of the following represents (D4)16 ?

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Solution

NIMCET PYQ
How many Boolean expressions can be be formed with 3 Boolean variables?

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Solution

NIMCET PYQ
In an 8 bit representation of computer system the decimal number 47 has to be subtracted from 38 and the result in binary 2's complement is _________

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Solution

NIMCET PYQ
The maximum and minimum value represented in signed 16 bit 2's complement representations are

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Solution

Range of 2's complement $-2^{n-1}$ to $2^{n-1}+1$

Range for 16 bits = $-2^{16-1}$ to $2^{16-1}+1$

Range for 16 bits = $-2^{15}$ to $2^{25}+1$

Range for 16 bits = $-32768$ to $32767$

NIMCET PYQ
The minimum number of NAND gates required for implementing the Boolean expression $AB+A\, \overline{B}C+A\, \overline{B}\, \overline{C}$

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Solution

$AB+A\, \overline{B}C+A\, \overline{B}\, \overline{C}$
=$AB+AB'C+AB'C'$
=$AB+AB'(C+C')$
=$AB+AB'$
=$A(B+B')$
=A

NIMCET PYQ
Which of the following is equivalent to the Boolean expression:
$(X+Y).(X+\overline{Y}).(\overline{X}+Y)$

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Solution

$(X+Y).(X+\overline{Y}).(\overline{X}+Y)$
=$(X+Y)(X+Y')(X'+Y)$
=$(XX+XY+YX+YY')(X'+Y)$
=$(X+XY)(X'+Y)$
=$X(1+Y)(X'+Y)$
=$X(X'+Y)$
=$XX'+XY$
=$XY$

NIMCET PYQ
Suppose the largest n bit number requires ‘d’ digits in decimal representation. Which of the following relations between ‘n’ and ‘d’ is approximately correct

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Solution

n bits binary number required d -decimal digits.

So, ${10}^d{\gt}{2}^n$

Take on both side

$\log _{10}({10}^d)\gt{\log _{10}({2}^n)}^{}$

$d{\gt}n\log _{10}(2)$

NIMCET PYQ
If a processor clock is rated as 2500 million cycles per second, then its clock period is:

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Solution

we know that Frequency is defined as the number of cycles in one second

Number of cycle in 1 sec = 2500 million

=> Frequency = 2500 Mhz

we know that time period is the inverse of frequency and is defined as the time taken by one cycle.

$T = \frac{1}{F}$

$T = \frac{1}{2500 \times 10^{-6}}$

$T=4 \times 10^{-10}$ sec

NIMCET PYQ
Write the simplified form of the Boolean expression

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Solution

=(A+C)A(D+D')+C(A+1)
=(A+C)+C
=A+C

NIMCET PYQ
FFFF will be the last memory location in a memory of size

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Solution

The Hexadecimal digits are 0-9 and A-F. The Hexadecimal system represents numbers in16 symbols, zero to nine and ten to fifteen is represented by the English alphabet A-F.

The Hexadecimal character represents 4 bits.
The last memory location in a memory of size 64K is FFFF.

64K is $2^{16}$ bytes, i.e.
$16^4$ bytes = 1000 bytes in hexadecimal code.

The last accessible address is 1000-1 = FFFF.

NIMCET PYQ
‘Floating point representation' is used to represent

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Solution

NIMCET PYQ
The Boolean expression AB+ AB' + A'C + AC is unaffected by the value of the Boolean variable

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Solution

$\begin{array}{ll}{A(B+\overline{B})+C(A+\overline{A})} \\ {A+C}\, \end{array}$

NIMCET PYQ
If a signal passing through a gate is inhibited by sending a low into one of the inputs, and the output is HIGH, the gate is a(n):

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Solution

Output is high if any of the input is low. The truth table for NAND gate is:
 A B Output 0 0 0 0 1 1 1 0 1 1 1 1
Table representing NAND Gate.

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