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Recent questions tagged descriptive
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CGPDTM20152
To successfully prevent user programs from causing damage to other programs or OS, hardware support is required. Name the hardware mechanisms in modern CPUs that support this goal and describe what specific kinds of damage it prevents.
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Oct 28
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Operating System
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ISI2016PCBB1
Consider the array $A=[20,13,19,8,3,5,4] that represents a heap. Draw the heap after removing the element 20. List all the distinct integer keys $k$ such that, when $k$ is inserted in the Binary Search Tree of Figure 1, its height increases. Note that you are not allowed to insert an already existing key again. Justify your answer.
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Sep 18
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jothee
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ISI2016PCBB2
Consider sending a large file of 360,000 bits from Host A to Host B, connected through a router, as shown in the below figure. Assume that there is no queuing ans propagation delay, and the router has sufficient buffer space. Host A splits the ... transferring one byte involves 4 operations: instatus, checkstatus, branch and read/write in memory, each requiring one machine cycle.
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Sep 18
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jothee
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ISI2016PCBB3
Consider the following extract from a program, written in a Clike language, that computes the transpose of a matrix. for (i=0; i<N; i++) for (j=0; j<N; j++) B[i,j]=A[i,j]; $A$ and $B$ are $N \times N$ matrices with floating point ... 8 bytes Each of $A$ and $B$ is stored starting from the beginning of a page None of the pages allocated to $A$ and $B$ are initially in memory.
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jothee
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ISI2016PCBB4
Commodity items have some positive or negative changes in their prices each week. Each trading company picks a portfolio of commodity items, that is, they have one or more items and they own some nonzero quantity of each one. The database table for this problem ... and there exists at least one company selling that item only. (i.e., not selling any other item) in that week.
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Sep 18
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jothee
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isi2016pcbb
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ISI2016PCBB5
What will be the output of the following C program? If you think it will give a runtime error, you need to mention it. In either case, your answer must include proper justifications without which no credit will be given. #include<stdio.h> main() { unsigned char i, j, a[]={1, 2, 3, 4, 5}; ... ;, i, j, n); while(j !=0) a[0]+=n; printf("j=%d, a[0]=%d\n", j, a[0]); }
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Sep 18
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jothee
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isi2016pcbb
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ISI2016PCBB8
Consider all possible trees with $n$ nodes. Let $k$ be the number of nodes with degree greater than 1 in a given tree. What is the maximum possible value of $k$? Justify your answer. Consider $2n$ committees, each having at least $2n$ persons, formed from a group of $4n$ persons. Prove that there exists at least one person who belongs to at least n committees.
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Sep 18
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jothee
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isi2016pcbb
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ISI2016PCBA1
If $\alpha, \beta, \gamma$ are the roots of the equation $x^3+6x+1=0$, then prove that $\frac{\alpha}{\beta} + \frac{\beta}{\alpha} + \frac{\beta}{\gamma}+ \frac{\gamma}{\beta} + \frac{\gamma}{\alpha}+ \frac{\alpha}{\gamma}=3$
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Sep 18
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Others
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jothee
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isi2016pcba
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ISI2016PCBA2
Let $n$ be a fixed positive integer. For any real number $x$, if for some integer $q$, $x=qn+r, \: \: \: 0 \leq r < n$, then we define $x \text{ mod } n=r$. Specify the points of discontinuity of the function $f(x)=x \text{ mod } 3$ with proper reasoning.
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Sep 18
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jothee
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ISI2016PCBA3
A bit string is called legitimate if it contains no consecutive zeros, e.g., 0101110 is legitimate, where as 10100111 is not. Let $a_n$ denote the number of legitimate bit strings of length $n$. Define $a_0=1$. Derive a recurrence relation for $a_n$ (i.e., express $a_n$ in terms of the preceding $a_i$').
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Sep 18
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Others
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jothee
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isi2016pcba
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+2
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2
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11
GATE199810b
Let $R$ be a binary relation on $A = \{a, b, c, d, e, f, g, h\}$ represented by the following two component digraph. Find the smallest integers $m$ and $n$ such that $m < n$ and $R^m = R^n$.
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Aug 12
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Set Theory & Algebra
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Arjun
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gate1998
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settheory&algebra
relations
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12
Kennth Rosen,ch:1,Ex:1.3,Qn:51
Find a compound proposition logically equivalent to $p \rightarrow q$ using only the logical operator $\downarrow$?
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Jun 5
in
Mathematical Logic
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siva140191
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Kennth Rosen Ch:1,Ex:1.2, Qn:38.
Solve this famous logic puzzle, attributed to Albert Einstein, and known as the zebra puzzle.Five men with different nationalities and with different jobs live in consecutive houses on a street. These houses are painted different colors. The men ... , their pets, and their favorite drinks and use logical reasoning to determine the correct entries in the table.]?
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Jun 3
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Mathematical Logic
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siva140191
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80
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settheory&algebra
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14
CMI2010  6
You are given a list of positive integers along with a sequence of operations from the set $\left \{ *,+\right \}$ .You construct expressions from these two lists so that: The numbers in the expression are drawn from the first list, without repetition and ... assume that the length of the first list is more than the length of the second list. Describe an algorithm to solve this problem.
asked
Apr 30
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Algorithms
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Sammohan Ganguly
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198
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algorithms
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cmi2010
algorithmdesign
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2
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15
GATE200218b
The functionality of atomic TESTANDSET assembly language instruction is given by the following C function int TESTANDSET (int *x) { int y; A1: y=*x; A2: *x=1; A3: return y; } Complete the following C functions for implementing code for ... starvationfree? For the above solution, show by an example that mutual exclusion is not ensured if TESTANDSET instruction is not atomic?
asked
Feb 28
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Operating System
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jothee
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273
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gate2002
operatingsystem
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3
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16
GATE19901ivb
A 32bit floatingpoint number is represented by a 7bit signed exponent, and a 24bit fractional mantissa. The base of the scale factor is 16, The range of the exponent is ___________, if the scale factor is represented in excess64 format.
asked
Feb 12
in
Digital Logic
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jothee
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335
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gate1990
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numberrepresentation
floatingpointrepresentation
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2
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17
GATE200111b
A sequential circuit takes an input stream of 0's and 1's and produces an output stream of 0's and 1's. Initially it replicates the input on its output until two consecutive 0's are encountered on the input. From then onward, it produces an output stream, ... be used to design the circuit. Give the minimized sumofproduct expression for J and K inputs of one of its state flipflops
asked
Feb 12
in
Digital Logic
by
jothee
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105k
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201
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gate2001
digitallogic
normal
descriptive
flipflop
+3
votes
2
answers
18
GATE200121b
Consider a relation examinee (regno, name, score), where regno is the primary key to score is a real number. Write an SQL query to list the regno of examinees who have a score greater than the average score.
asked
Feb 8
in
Databases
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jothee
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105k
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228
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gate2001
databases
sql
normal
descriptive
–1
vote
1
answer
19
GATE200121c
Consider a relation $\text{examinee (regno, name, score)},$ where regno is the primary key to score is a real number. Suppose the relation $\text{appears (regno, centr_code)}$ specifies the center where an examinee appears. Write an SQL query to list the centr_code having an examinee of score greater than $80.$
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Feb 8
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Databases
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jothee
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105k
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141
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gate2001
databases
sql
normal
descriptive
+2
votes
1
answer
20
CMI2017B8
Consider the following function that takes as input a sequence $A$ of integers with n elements, $A$$\left [ A1 \right ]$, $\left [ A2 \right ], \ldots, \left [ An \right ]$and an integer $k$ and returns an integer value. The function length$(S)$ ... complexity of this algorithm in terms of the length of the input sequence $A$? Give an example of a worstcase input for this algorithm.
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Feb 5
in
Algorithms
by
Tesla!
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17.2k
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153
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cmi2017
algorithms
timecomplexity
descriptive
+10
votes
2
answers
21
ISI Entrance Exam MTech (CS)
Consider all possible trees with $n$ nodes. Let $k$ be the number of nodes with degree greater than $1$ in a given tree. What is the maximum possible value of $k$?
asked
Apr 6, 2017
in
Graph Theory
by
Shreya Roy
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4.3k
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731
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isi2016
graphtheory
trees
descriptive
+2
votes
1
answer
22
False sharing in cache Line
Here is pseudo code for a multiprocessing purpose: set_num_threads(NUM_THREADS); double sum=0.0; sum_local[NUM_THREADS]; parallel region { int this_thread_id = get_thread_number(); // returns 0 to (no_of_threads1) sum_local[this_thread_id] = 0.0; for (i ... I think frequent DRAM write back causing the problem, but not very clear, though. please explain a bit. @Arjun Sir
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Mar 6, 2017
in
CO & Architecture
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Debashish Deka
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254
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coandarchitecture
cachememory
nongate
descriptive
+2
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1
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23
ISI 2016 PCB C8
Consider $2n$ committees, each having at least $2n$ persons, formed from a group of $4n$ persons. Prove that there exists at least one person who belongs to at least $n$ committees.
asked
Mar 5, 2017
in
Others
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Devasish Ghosh
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703
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147
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datastructure
engineeringmathematics
isi2016
descriptive
graphtheory
0
votes
2
answers
24
Discrete math
The following is a sequence of formula, $$\begin{align*} \begin{matrix} & 9*1+2 &= &11 \\ & 9*12+3 &= &111 \\ & 9*123+4 &= &1111 \\ & 9*1234+5 &= &11111 \\ \end{matrix} \\ \dots \dots \dots \ ... \\ \end{align*}$$ Here numbers are in base $10$. (a) Establish a formula in $\sum$ notation. (b) Generalize that formula in for any base $b$..
asked
Feb 26, 2017
in
Set Theory & Algebra
by
Debashish Deka
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57.4k
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117
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discretemathematics
descriptive
nongate
0
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2
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25
Discrete Math
Prove or disprove: $\begin{align*} \log_8x = \frac{1}{2}.\log_{2}x \end{align*}$.
asked
Feb 25, 2017
in
Set Theory & Algebra
by
Debashish Deka
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106
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discretemathematics
descriptive
nongate
0
votes
0
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26
Discrete math
Let $w \in \sum$$*$ be a string, with $\sum$ being the alphabet. Let $w^R$ be the reversal of string $w$, using induction prove that $(w^R)(w^R). . .(\text{for k times}) = (ww . . .(\text{for k times}))^R.$
asked
Feb 22, 2017
in
Set Theory & Algebra
by
Debashish Deka
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57.4k
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74
views
descriptive
iitg_math
discretemathematics
0
votes
2
answers
27
Discrete Math
Prove or disprove the following: for finite sets A and B, $\overline{(A  B) \cup (B  A)} = A \cap B$ . If the proposition is incorrect, do minimal modifications to the same and prove.
asked
Feb 22, 2017
in
Set Theory & Algebra
by
Debashish Deka
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57.4k
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115
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discretemathematics
iitg_math
nongate
descriptive
0
votes
1
answer
28
Discrete math
Prove the following: $3 \;  \;\left ( a^2+b^2 \right )$ if and only if $3 \;  \;a$ and $3 \;  \;b$.
asked
Feb 22, 2017
in
Set Theory & Algebra
by
Debashish Deka
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(
57.4k
points)

106
views
discretemathematics
iitg_math
descriptive
nongate
+1
vote
2
answers
29
Stable sorting algorithms
Show that any comparison based sorting algorithm can be made stable without increasing its complexity beyond a constant factor.
asked
Feb 21, 2017
in
Algorithms
by
Debashish Deka
Veteran
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57.4k
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227
views
algorithms
descriptive
timecomplexity
nongate
0
votes
1
answer
30
CMI2016B7ai
Consider the funciton $M$ defined as follows: $M(n) = \begin{cases} n10 & \text{ if } n > 100 \\ M(M(n+11)) & \text{ if } n \leq 100 \end{cases}$ Compute the following: M(101)
asked
Dec 31, 2016
in
Others
by
jothee
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105k
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45
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cmi2016
descriptive
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