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1

Self Doubt:
What would be the number of super keys for a relation R with “n” attributes? NOTE: Any attribute can be the candidate key.

asked in Databases Oct 29, 2021

279 views

2 answers

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GATE CSE 2021 Set 1 | Question: 5
Consider the following statements. $S_1:$ Every $\text{SLR(1)}$ grammar is unambiguous but there are certain unambiguous grammars that are not $\text{SLR(1)}$. $S_2:$ For any context-free grammar, there is a parser that takes at most $O(n^3)$ time to parse a ... false $S_1$ is false and $S_2$ is true $S_1$ is true and $S_2$ is true $S_1$ is false and $S_2$ is false

commented in Compiler Design Oct 18, 2021

7.8k views

5 answers

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GATE CSE 2001 | Question: 1.3
Consider two well-formed formulas in propositional logic $F_1: P \Rightarrow \neg P$ $F_2: (P \Rightarrow \neg P) \lor ( \neg P \Rightarrow P)$ Which one of the following statements is correct? $F_1$ is satisfiable, $F_2$ is valid $F_1$ unsatisfiable, $F_2$ is satisfiable $F_1$ is unsatisfiable, $F_2$ is valid $F_1$ and $F_2$ are both satisfiable

commented in Mathematical Logic Sep 28, 2021

9.0k views

9 answers

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GATE CSE 2021 Set 2 | Question: 15
Choose the correct choice(s) regarding the following proportional logic assertion $S$: $S: (( P \wedge Q) \rightarrow R) \rightarrow (( P \wedge Q) \rightarrow (Q \rightarrow R))$ $S$ is neither a tautology nor a contradiction $S$ is a tautology $S$ is a contradiction The antecedent of $S$ is logically equivalent to the consequent of $S$

commented in Mathematical Logic Sep 27, 2021

8.7k views

6 answers

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GATE2014 EC-4: GA-10
A five digit number is formed using the digits $1,3,5,7$ and $9$ without repeating any of them. What is the sum of all such possible five digit numbers? $6666660$ $6666600$ $6666666$ $6666606$

commented in Quantitative Aptitude Sep 23, 2021

5.2k views

6 answers

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GATE CSE 2017 Set 1 | Question: GA-9
Arun, Gulab, Neel and Shweta must choose one shirt each from a pile of four shirts coloured red, pink, blue and white respectively. Arun dislikes the colour red and Shweta dislikes the colour white. Gulab and Neel like all the colours. In how many different ways ... the shirts so that no one has a shirt with a colour he or she dislikes? $21$ $18$ $16$ $14$

commented in Quantitative Aptitude Sep 23, 2021

10.0k views

1 answer

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GATE ECE 2021 | GA Question: 1
The current population of a city is $11,02,500$ . If it has been increasing at the rate of $5\%$ per annum, what was its population $2$ years ago? $9,92,500$ $9,95,006$ $10,00,000$ $12,51,506$

commented in Quantitative Aptitude Sep 12, 2021

2.3k views

4 answers

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GATE2013 AE: GA-2
The Headmaster ___________ to speak to you. Which of the following options is incorrect to complete the above sentence? is wanting wants want was wanting

commented in Verbal Aptitude Sep 5, 2021

4.2k views

7 answers

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GATE CSE 1995 | Question: 1.24
The rank of the following $(n+1) \times (n+1)$ matrix, where $a$ ... $1$ $2$ $n$ Depends on the value of $a$

commented in Linear Algebra Aug 31, 2021

5.0k views

5 answers

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GATE IT 2005 | Question: 22
A table has fields $F_1, F_2, F_3, F_4, F_5$ with the following functional dependencies $F_1 \to F_3, F_2\to F_4, (F_1 . F_2) \to F_5$ In terms of Normalization, this table is in $1\;\text{NF}$ $2\;\text{NF}$ $3\;\text{NF}$ None of these

commented in Databases Aug 28, 2021

7.2k views

3 answers

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GATE2019 EE: GA-4
It takes two hours for a person $X$ to mow the lawn. $Y$ can mow the same lawn in four hours. How long (in minutes) will it take $X$ and $Y,$ if they work together to mow the lawn$?$ $60$ $80$ $90$ $120$

commented in Quantitative Aptitude Aug 26, 2021

2.2k views

2 answers

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GATE CSE 2008 | Question: 83
Consider the following $\text{ER}$ diagram The minimum number of tables needed to represent $M$, $N$, $P$, $R1$, $R2$ is Which of the following is a correct attribute set for one of the tables for the minimum number of tables needed to represent $M$, $N$, $P$, $R1$, $R2$? ${M1, M2, M3, P1}$ ${M1, P1, N1, N2}$ ${M1, P1, N1}$ ${M1, P1}$

commented in Databases Aug 23, 2021

10.6k views

6 answers

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can cadidate key may be null?

answered in Databases Aug 4, 2021

13.6k views

1 answer

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fragmentation
Assume a datagram of length 5*103 bytes needs to pass through five networks to reach its destination. The MTU’s of each network is 1000, 820, 850, 950 and 900 respectively. Then at destination how many datagrams has to reached and what is the offset value of 3rd fragment after fragmentation? 7, 200 6, 400 6, 300

commented in Computer Networks Jul 28, 2021

1.9k views

3 answers

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GATE2012 AR: GA-9
A smuggler has $10$ capsules in which five are filled with narcotic drugs and the rest contain the original medicine. All the $10$ capsules are mixed in a single box, from which the customs officials picked two capsules at random and tested for the presence of narcotic drugs. The probability that the smuggler will be caught is $0.50$ $0.67$ $0.78$ $0.82$

commented in Quantitative Aptitude Jun 29, 2021

3.9k views

4 answers

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GATE CSE 2015 Set 1 | Question: GA-3‏
Given Set $A= {2, 3, 4, 5}$ and Set $B= { 11, 12, 13, 14, 15}$, two numbers are randomly selected, one from each set. What is the probability that the sum of the two numbers equals $16$? $0.20$ $0.25$ $0.30$ $0.33$

commented in Quantitative Aptitude Jun 28, 2021

7.2k views

4 answers

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GATE CSE 2021 Set 2 | Question: 19
Consider a set-associative cache of size $\text{2KB (1KB} =2^{10}$ bytes$\text{)}$ with cache block size of $64$ bytes. Assume that the cache is byte-addressable and a $32$ -bit address is used for accessing the cache. If the width of the tag field is $22$ bits, the associativity of the cache is _________

commented in CO and Architecture Jun 8, 2021

7.1k views

3 answers

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GATE CSE 2015 Set 1 | Question: GA-9
The pie chart below has the breakup of the number of students from different departments in an engineering college for the year $2012$. The proportion of male to female students in each department is $5:4$. There are $40$ ... is the difference between the numbers of female students in the civil department and the female students in the Mechanical department?

commented in Quantitative Aptitude Mar 21, 2021

8.0k views

3 answers

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GATE CSE 2014 Set 2 | Question: GA-9
The ratio of male to female students in a college for five years is plotted in the following line graph. If the number of female students doubled in $2009$, by what percent did the number of male students increase in $2009$?

answered in Quantitative Aptitude Mar 21, 2021

6.1k views

1 answer

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aptitude question on ratios
In a Certain office,1/3 of the workers are women,1/2 of the women are married and 1/3 of the married women have children. If 3/4 of the men are married and 2/3 of the married men have children. What part of the workers are without children?? a)5/ ... )11/18 d)17/36 my answer is 11/18 but given to be correct is 5/18??help guys.. but please mention the complete procedure.

commented in Quantitative Aptitude Mar 5, 2021

1.8k views

7 answers

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GATE CSE 2007 | Question: 65
There are $n$ stations in slotted LAN. Each station attempts to transmit with a probability $p$ in each time slot. What is the probability that ONLY one station transmits in a given time slot? $np(1-p)^{n-1}$ $(1-p)^{n-1}$ $p(1-p)^{n-1}$ $1-(1-p)^{n-1}$

commented in Computer Networks Feb 8, 2021

13.8k views

4 answers

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GATE CSE 2014 Set 1 | Question: GA-8
Round-trip tickets to a tourist destination are eligible for a discount of $10\%$ on the total fare. In addition, groups of $4$ or more get a discount of $5\%$ on the total fare. If the one way single person fare is $Rs$ $100$, a group of $5$ tourists purchasing round-trip tickets will be charged $Rs$ __________

commented in Quantitative Aptitude Oct 7, 2020

6.2k views

4 answers

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GATE CSE 2015 Set 2 | Question: GA-3
Consider a function $f(x) = 1- |x| \text{ on } -1 \leq x \leq 1$. The value of $x$ at which the function attains a maximum, and the maximum value of the function are: $0, -1$ $-1, 0$ $0, 1$ $-1, 2$

comment edited in Calculus Oct 6, 2020

6.8k views

4 answers

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GATE CSE 2015 Set 1 | Question: GA-4
Based on the given statements, select the most appropriate option to solve the given question. If two floors in a certain building are $9$ feet apart, how many steps are there in a set of stairs that extends from the ... . Both statements together are sufficient, but neither statement alone is sufficient. Statements I and II together are not sufficient.

commented in Verbal Aptitude Oct 6, 2020

4.0k views

10 answers

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GATE IT 2005 | Question: 33
Let $A$ be a set with $n$ elements. Let $C$ be a collection of distinct subsets of $A$ such that for any two subsets $S_1$ and $S_2$ in $C$, either $S_1 \subset S_2$ or $S_2\subset S_1$. What is the maximum cardinality of $C?$ $n$ $n+1$ $2^{n-1} + 1$ $n!$

commented in Set Theory & Algebra Oct 1, 2020

11.8k views

4 answers

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GATE CSE 2004 | Question: 27
Let $A, B, C, D$ be $n \times n$ matrices, each with non-zero determinant. If $ABCD = I$, then $B^{-1}$ is $D^{-1}C^{-1}A^{-1}$ $CDA$ $ADC$ Does not necessarily exist

commented in Linear Algebra Oct 1, 2020

10.0k views

6 answers

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GATE CSE 2001 | Question: 1.1
Consider the following statements: S1: The sum of two singular $n \times n$ matrices may be non-singular S2: The sum of two $n \times n$ non-singular matrices may be singular Which one of the following statements is correct? $S1$ and $S2$ both are true $S1$ is true, $S2$ is false $S1$ is false, $S2$ is true $S1$ and $S2$ both are false

commented in Linear Algebra Oct 1, 2020

8.3k views

1 answer

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KPGCET-CSE-2019-50
In the software testing, the behavioural testing is called White box testing Black box testing Mutation testing Integration testing

answered in IS&Software Engineering Aug 31, 2020

321 views

0 answers

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book name is" test ur c aptitude"
plzzz explain how this code is executed

commented in Programming in C Aug 31, 2020

439 views

2 answers

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Bottom up parsers
What is the difference between $SLR(1)$ and $LALR(1)$ parser ? Both parser have same parsing table then how $SLR$ is subset of $LALR$ ?

commented in Compiler Design Aug 31, 2020

1.1k views