Questions by ykrishnay / GATE Overflow for GATE CSE

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1

DBMS -- Book Confusion
which is best book for DBMS korth or navathe ? since i know that both book is great but i wanted to follow 1 particular book that is easy to understand and simple language for all topics. please suggest .

which is best book for DBMS korth or navathe ?since i know that both book is great but i wanted to follow 1 particular book that is easy to understand and simple language...

575 views

asked Sep 6, 2022

1 votes

1 answer

2

data structure and algorithms -- linked list -- size of a node
as we allocate the space for node in linked list using malloc() so how many bytes malloc allocate for the 1 node i.e. actual value of malloc allocates in ram like i write this code. so what is size of a node of linked ... node *)malloc(sizeof(struct node)); printf("%d",sizeof(struct node)); } what the printf prints and why ?

as we allocate the space for node in linked list using malloc() so how many bytes malloc allocate for the 1 node i.e. actual value of malloc allocates in ram like i write...

685 views

asked Aug 5, 2022

0 votes

3 answers

3

Extern in C programming
int main() { extern int a = 20; printf("%d",a); } //why this gives error but followig code is not extern int a =20; int main() { printf("%d",a); } //why this happens that first code gives error but second is not ? //please tell i am realy confused now

int main(){extern int a = 20;printf("%d",a); }//why this gives error but followig code is not extern int a =20;int main(){printf("%d",a); } //why this happens that first ...

1.1k views

asked May 30, 2022

0 votes

1 answer

4

C programming "extern" keyword
suppose i have 2 files //FILE1.h int var = 10; //FILE2.c #include<stdio.h> #include "FILE1.h" int main() { printf("%d",var); } so this file2.c gives output 10 so why we use extern keyword cause without ... work that is access the variable from other file is easily done without extern so what is exact use of extern keyword. thank you

suppose i have 2 files//FILE1.hint var = 10; //FILE2.c #include<stdio.h #include "FILE1.h" int main() { printf("%d",var); }so this file2.c gives output “10” so why we...

631 views

asked May 29, 2022

2 votes

2 answers

5

what is the ouput of this c code ?
// C/C++ program to demonstrate return value // of printf() #include <stdio.h> int main() { long int n = 123456789; printf("While printing "); printf(", the value returned by printf() is : %d", printf("%ld" ... : 9 123456789 but this prints While printing 123456789, the value returned by printf() is : 9 why this is happens ?

// C/C++ program to demonstrate return value// of printf()#include <stdio.h>int main(){ long int n = 123456789; printf("While printing "); printf(", the value re...

676 views

asked May 23, 2022

0 votes

1 answer

6

BEGINNER FRIENDLY BOOK FOR ALGORITHMS ?
I wanted to read ALgorithms by cormen but is it to complex to read for beginners ? or i read from other book ? please tell about the cormen is it easy to read for gate and PSU interviews ?

I wanted to read ALgorithms by cormen but is it to complex to read for beginners ? or i read from other book ?please tell about the cormen is it easy to read for gate and...

535 views

asked May 22, 2022

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0 answers

7

What is stream in c programming ?
What is stream in c programming ? as i read file io in c programming so thats where i read “stream” word so what stream means ? thank you

What is stream in c programming ? as i read file io in c programming so thats where i read “stream” word so what stream means ? thank you

386 views

asked May 20, 2022

0 votes

2 answers

8

Is "operating system three easy pieces" Book is enough for gate exam?
Is "operating system three easy pieces" Book is enough for gate exam? Or I read another book especially for GATE exam Please tell I am confused

Is "operating system three easy pieces" Book is enough for gate exam? Or I read another book especially for GATE exam Please tell I am confused

768 views

asked May 14, 2022

0 votes

0 answers

9

C programming - code
what is the ouput of this code ? main() { int x = 10; int y = (++x) + (--x); printf(“%d”,y); } and i am confuse about this code specifically about this expression int y = (++x) + (--x); so if this expression is wrong so what the wrong about this expression and topic related to “Precedence and associativity”

what is the ouput of this code ?main(){int x = 10;int y = (++x) + ( x);printf(“%d”,y);} and i am confuse about this code specifically about this expression int y = (+...

274 views

asked Apr 27, 2022

0 votes

1 answer

10

How to find a range of float,double,long in c programming?
How to find a range of float,double,long in c programming? just like we find the range in case of int (signed,unsigned),char (signed ,unsigned) in c programming language ? like integer unsigned range is 0 to 65535 and so on for other data types ? Thank you ahead

How to find a range of float,double,long in c programming? just like we find the range in case of int (signed,unsigned),char (signed ,unsigned) in c programming language ...

241 views

asked Apr 23, 2022

0 votes

1 answer

11

GATEOVERFLOW QUESTION
what is join circle request in GO site and what is the advantage of this and what is the use of this and if i sent circle request to anyone ort accept the request from anyone what does means ?

what is join circle request in GO site and what is the advantage of this and what is the use of this and if i sent circle request to anyone ort accept the request from an...

555 views

asked Apr 20, 2022

0 votes

1 answer

12

kenneth h rosen chapter 1 section 1.5 PRENEX NORMAL FORM in excercise 1.5
can this topic “PRENEX NORMAL FORM(PNF) ” is necsesary for gate or just i skip this topic.

can this topic “PRENEX NORMAL FORM(PNF) ” is necsesary for gate or just i skip this topic.

301 views

asked Apr 20, 2022

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0 answers

13

kenneth h rosen chapter 1 section section 1.5 nested quatnifiers excercise 49
49. a) Show that ∀xP (x) ∧ ∃xQ(x) is logically equivalent to ∀x∃y (P (x) ∧ Q(y)), where all quantifiers have the same nonempty domain. b) Show that ∀xP (x) ∨ ∃xQ(x) is equivalent to ∀x∃y (P (x) ∨ Q(y)), where all quantifiers have the same nonempty domain. please anybody tell how to prove this logical equivalency ?

49. a) Show that ∀xP (x) ∧ ∃xQ(x) is logically equivalentto ∀x∃y (P (x) ∧ Q(y)), where all quantifiers havethe same nonempty domain.b) Show that ∀xP (x) ∨...

377 views

asked Apr 20, 2022

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0 answers

14

kenneth h rosen chapter 1 section 1.5 nested quantifiers excercise 1.5 question 48
Show that ∀xP (x) ∨ ∀xQ(x) and ∀x∀y(P (x) ∨ Q(y)), where all quantifiers have the same nonempty domain, are logically equivalent. (The new variable y is used to combine the quantifications correctly.)

Show that ∀xP (x) ∨ ∀xQ(x) and ∀x∀y(P (x) ∨ Q(y)),where all quantifiers have the same nonempty domain,are logically equivalent. (The new variable y is used to...

540 views

asked Apr 20, 2022

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0 answers

15

kenneth h rosen chapter 1 section nested quantifers excercise 1.5 question 40
Find a counterexample, if possible, to these universally quantified statements, where the domain for all variables consists of all integers. a) ∀x∃y(x = 1/y) b) ∀x∃y(y^2 − x < 100)

Find a counterexample, if possible, to these universallyquantified statements, where the domain for all variablesconsists of all integers.a) ∀x∃y(x = 1/y)b) ∀x∃y(...

341 views

asked Apr 19, 2022

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0 answers

16

kenneth h rosen chapter 1 section 1.5 nested quantifers question 34
Find a common domain for the variables x, y, and z for which the statement ∀x∀y((x = y) → ∀z((z = x) ∨ (z = y))) is true and another domain for which it is false.

Find a common domain for the variables x, y, and zfor which the statement ∀x∀y((x = y) → ∀z((z = x) ∨(z = y))) is true and another domain for which it is false....

268 views

asked Apr 18, 2022

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0 answers

17

kenneth h rosen chapter 1 section "Nested quantifers" excercise 1.5 question 26's g
Let Q(x, y) be the statement “x + y = x − y.” If the do- main for both variables consists of all integers, what are the truth values? g) ∃y∀xQ(x, y) Basically i done all the subquestions (a,b,c,d,e,f,h,i) from this question but confused in g subquestion please give answer

Let Q(x, y) be the statement “x + y = x − y.” If the do-main for both variables consists of all integers, what arethe truth values?g) ∃y∀xQ(x, y)Basically i don...

200 views

asked Apr 18, 2022

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0 answers

18

kenneth h rosen chapter 1 section 1.5 excercise 1.5 question 18 e
Express each of these system specifications using predi- cates, quantifiers, and logical connectives, if necessary. e) No one knows the password of every user on the sys- tem except for the system administrator, who knows all passwords.

Express each of these system specifications using predi-cates, quantifiers, and logical connectives, if necessary. e) No one knows the password of every user on the sys-t...

325 views

asked Apr 16, 2022

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0 answers

19

kenneth h rosen chapter 1 section 1.5 nested quantifiers excercise no 17, b
Express each of these system specifications using predi- cates, quantifiers, and logical connectives, if necessary. b)There is a process that continues to run during all error conditions only if the kernel is working correctly.

Express each of these system specifications using predi-cates, quantifiers, and logical connectives, if necessary.b)There is a process that continues to run during all er...

192 views

asked Apr 16, 2022

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0 answers

20

Kenneth h rosen chapter 1 section 1.5 nested quantifiers

158 views

asked Mar 25, 2022

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