Answers by STUDYGATE2019 / GATE Overflow for GATE CSE

2 votes

1

ISRO2020-52
To send same bit sequence, $\text{NRZ}$ encoding require Same clock frequency as Manchester encoding Half the clock frequency as Manchester encoding Twice the clock frequency as Manchester encoding A clock frequency which depend on number of zeroes and ones in the bit sequence

To send same bit sequence, $\text{NRZ}$ encoding requireSame clock frequency as Manchester encodingHalf the clock frequency as Manchester encodingTwice the clock frequenc...

2.5k views

answered Jan 14, 2020

1 votes

2

ISRO2020-35
Given the grammar $s \rightarrow T ^{\ast} S\ \mid T$ $T \rightarrow U+T\ \mid U$ $U \rightarrow a \mid b$ Which of the following statements is wrong? Grammar is not ambiguous Priority of $+$ over $^{\ast}$ is ensured Right to left evaluation of $^{\ast}$ and $+$ happens None of these

Given the grammar$s \rightarrow T ^{\ast} S\ \mid T$$T \rightarrow U+T\ \mid U$$U \rightarrow a \mid b$Which of the following statements is wrong?Grammar is not ambiguou...

3.8k views

answered Jan 13, 2020

0 votes

3

ISRO2020-44
In a columnar transportation cipher, the plain text is the tomato is a plant in the night shade family , keyword is $\text{TOMATO}$ . The cipher text is $\text{ TINESAX / EOAHTFX / HTLTHEY / MAIIAIX / TAPNGDL / OSTNHMX }$ ... $\text{ EOAHTFX / TINESAX / HTLTHEY / MAIIAIX / TAPNGDL / OSTNHMX }$

In a columnar transportation cipher, the plain text is “the tomato is a plant in the night shade family”, keyword is “$\text{TOMATO}$”. The cipher text is$\text{�...

3.5k views

answered Jan 13, 2020

2 votes

4

ISRO2020-50
If every non-key attribute functionally dependent on the primary key, then the relation will be in First normal form Second normal form Third normal form Fourth Normal form

If every non-key attribute functionally dependent on the primary key, then the relation will be inFirst normal formSecond normal formThird normal formFourth Normal form

9.2k views

answered Jan 13, 2020

0 votes

5

ISRO2020-48
Properties of $\text{ DELETE'}$ and $\text{ TRUNCATE'}$ commands indicate that After the execution of $\text{ TRUNCATE'}$ operation, $\text{COMMIT}$, and $\text{ROLLBACK}$ statements cannot be performed to retrieve the lost data, while $\text{ DELETE'}$ ... allow it After the execution of $\text{ DELETE'}$ and $\text{ TRUNCATE'}$ operation no retrieval is possible for the lost data

Properties of $\text{‘DELETE’}$ and $\text{‘TRUNCATE’}$ commands indicate thatAfter the execution of $\text{‘TRUNCATE’}$ operation, $\text{COMMIT}$, and $\tex...

3.1k views

answered Jan 13, 2020

6 votes

6

ISRO2020-31
Three CPU-bound tasks, with execution times of $15,12$ and $5$ time units respectively arrive at times $0,t$ and $8$, respectively. If the operating system implements a shortest remaining time first scheduling algorithm, what should be the value of $t$ to have $4$ context switches? Ignore the context switches at time $0$ and at the end. $0<t<3$ $t=0$ $t<=3$ $3<t<8$

Three CPU-bound tasks, with execution times of $15,12$ and $5$ time units respectively arrive at times $0,t$ and $8$, respectively. If the operating system implements a s...

4.2k views

answered Jan 13, 2020

1 votes

7

ISRO2020-68
What is the defect rate for Six sigma? $1.0$ defect per million lines of code $1.4$ defects per million lines of code $3.0$ defects per million lines of code $3.4$ defects per million lines of code

What is the defect rate for Six sigma?$1.0$ defect per million lines of code$1.4$ defects per million lines of code$3.0$ defects per million lines of code$3.4$ defects pe...

1.4k views

answered Jan 13, 2020

6 votes

8

ISRO2020-23
The post-order traversal of binary tree is $\text{ACEDBHIGF}$. The pre-order traversal is $\text{A B C D E F G H I}$ $\text{F B A D C E G I H}$ $\text{F A B C D E G H I}$ $\text{A B D C E F G I H}$

The post-order traversal of binary tree is $\text{ACEDBHIGF}$. The pre-order traversal is$\text{A B C D E F G H I}$$\text{F B A D C E G I H}$$\text{F A B C D E G H I}$$\t...

18.7k views

answered Jan 13, 2020

2 votes

9

ISRO2020-25
What is compaction refers to a technique for overcoming internal fragmentation a paging technique a technique for overcoming external fragmentation a technique for compressing the data

What is compaction refers toa technique for overcoming internal fragmentationa paging techniquea technique for overcoming external fragmentationa technique for compressin...

4.3k views

answered Jan 13, 2020

2 votes

10

ISRO2020-67
What is the availability of the software with the following reliability figures Mean Time Between Failures (MTBF) is $20$ days Mean Time To Repair (MTTR) is $20$ hours $90\%$ $96\%$ $24\%$ $50\%$

What is the availability of the software with the following reliability figuresMean Time Between Failures (MTBF) is $20$ daysMean Time To Repair (MTTR) is $20$ hours$90\%...

3.8k views

answered Jan 13, 2020

1 votes

11

ISI2014-DCG-16
The sum of the series $\dfrac{1}{1.2} + \dfrac{1}{2.3}+ \cdots + \dfrac{1}{n(n+1)} + \cdots $ is $1$ $1/2$ $0$ non-existent

The sum of the series $\dfrac{1}{1.2} + \dfrac{1}{2.3}+ \cdots + \dfrac{1}{n(n+1)} + \cdots $ is$1$$1/2$$0$non-existent

693 views

answered Sep 27, 2019

0 votes

12

ISI2014-DCG-18
$^nC_0+2^nC_1+3^nC_2+\cdots+(n+1)^nC_n$ equals $2^n+n2^{n-1}$ $2^n-n2^{n-1}$ $2^n$ none of these

$^nC_0+2^nC_1+3^nC_2+\cdots+(n+1)^nC_n$ equals$2^n+n2^{n-1}$$2^n-n2^{n-1}$$2^n$none of these

763 views

answered Sep 27, 2019

0 votes

13

ISI2014-DCG-1
Let $(1+x)^n = C_0+C_1x+C_2x^2+ \dots + C_nx^n$, $n$ being a positive integer. The value of $\left( 1+\dfrac{C_0}{C_1} \right) \left( 1+\dfrac{C_1}{C_2} \right) \cdots \left( 1+\dfrac{C_{n-1}}{C_n} \right)$ is $\left( \frac{n+1}{n+2} \right) ^n$ $ \frac{n^n}{n!} $ $\left( \frac{n}{n+1} \right) ^n$ $ \frac{(n+1)^n}{n!} $

Let $(1+x)^n = C_0+C_1x+C_2x^2+ \dots + C_nx^n$, $n$ being a positive integer. The value of$$\left( 1+\dfrac{C_0}{C_1} \right) \left( 1+\dfrac{C_1}{C_2} \right) \cdots \l...

755 views

answered Sep 27, 2019

3 votes

14

Closure Properties Table
https://gateoverflow.in/?qa=blob&qa_blobid=8929616163903734815

https://gateoverflow.in/?qa=blob&qa_blobid=8929616163903734815

8.6k views

answered Sep 3, 2019

0 votes

15

Aptitude Doubt
The least number of five digits which is exactly divisible by 12,15 and 18 is: a)10080 b)10800 c)18000 d)81000

The least number of five digits which is exactly divisible by 12,15 and 18 is:a)10080 b)10800 c)18000 d)81000

640 views

answered Aug 14, 2019

0 votes

16

Square Root Aptitude Doubt
Please help with this question:- $(\sqrt{243}+3)^x+(\sqrt{243}-3)^x=15^x$.

Please help with this question:-$(\sqrt{243}+3)^x+(\sqrt{243}-3)^x=15^x$.

982 views

answered Aug 14, 2019

0 votes

17

OSI Model
Network layer is used when data is to be delivered across network. So, for delivering within a network, there is no need for network layer (Ref: Pg-49, Computer Networks, Forouzan, 2 Edition). So in that case will Transport layer directly communicate with Data Link layer ? Or will Network layer be in picture, but do nothing other than simply passing data to Transport layer ?

Network layer is used when data is to be delivered across network. So, for delivering within a network, there is no need for network layer (Ref: Pg-49, Computer Networks,...

1.3k views

answered Sep 17, 2018

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