Recent questions tagged gate1991

Recent questions tagged gate1991

3 votes

2 answers

1

CO & architecture
The arithmetic expression $: (a + b) \ast c - d / e \ast \ast f$ is to be evaluated on a two-address machine, where each operands, the number of registers required to evaluate this expression is ______. The number of memory access of operand is __________.

Satbir asked in CO and Architecture Nov 26, 2018

by Satbir

894 views

7 votes

3 answers

2

gate1991
Indicate all the true statements from the following: (a) A programming language not supporting either recursion or pointer type does not need the support of dynamic memory allocation. (b) Although C does not support call by name parameter passing, the effect can be correctly simulated in C.

Vishal Rana asked in Programming Apr 8, 2018

2.6k views

0 votes

0 answers

3

GATE CSE 1991 | Question: 07b
It is required to design a hardwired controller to handle the fetch cycle of a single address CPU with a $16$ bit instruction-length. The effective address of an indexed instruction should be derived in the fetch cycle itself. Assume ... bits of an instruction constitute the operand field. Draw the logic schematic of the hardwired controller including the data path.

jothee asked in CO and Architecture Apr 24, 2016

by jothee

528 views

16 votes

1 answer

4

GATE CSE 1991 | Question: 10c
Consider the following grammar for arithmetic expressions using binary operators $-$ and $/$ which are not associative $E \rightarrow E -T\mid T$ $T \rightarrow T/F\mid F$ $F \rightarrow (E) \mid id$ ($E$ is the start symbol ... given production rules and adding at most one more production rule. Convert the grammar obtained above into one that is not left recursive.

jothee asked in Compiler Design Apr 24, 2016

by jothee

1.7k views

13 votes

4 answers

5

GATE CSE 1991 | Question: 10b
Consider the following grammar for arithmetic expressions using binary operators $-$ and $/$ which are not associative $E \rightarrow E -T\mid T$ $T \rightarrow T/F\mid F$ $F \rightarrow (E) \mid id$ ($E$ is the start symbol ... with redundant parentheses. Do this with minimum number of changes to the given production rules and adding at most one more production rule.

jothee asked in Compiler Design Apr 24, 2016

by jothee

2.4k views

21 votes

2 answers

6

GATE CSE 1991 | Question: 09b
For the following code, indicate the output if static scope rules dynamic scope rules are used var a,b : integer; procedure P; a := 5; b := 10; end {P}; procedure Q; var a, b : integer; P; end {Q}; begin a := 1; b := 2; Q; Write ('a = ', a, 'b = ', b); end

jothee asked in Compiler Design Apr 24, 2016

by jothee

2.7k views

28 votes

2 answers

7

GATE CSE 1991 | Question: 14,c
Consider the binary tree in the figure below: Outline a procedure in Pseudo-code to delete an arbitrary node from such a binary tree with $n$ nodes that preserves the structures. What is the worst-case time complexity of your procedure?

Akash Kanase asked in DS Apr 18, 2016

by Akash Kanase

1.8k views

16 votes

3 answers

8

GATE CSE 1991 | Question: 14,b
Consider the binary tree in the figure below: Give different steps for deleting the node with key $5$ so that the structure is preserved.

Akash Kanase asked in DS Apr 18, 2016

by Akash Kanase

2k views

6 votes

2 answers

9

GATE CSE 1991 | Question: 11,b
Consider the following scheme for implementing a critical section in a situation with three processes $P_i, P_j$ and $P_k$. Pi; repeat flag[i] := true; while flag [j] or flag[k] do case turn of j: if flag [j] then begin flag ... in which a waiting process can never enter the critical section? If so, explain and suggest modifications to the code to solve this problem

jothee asked in Operating System Apr 18, 2016

by jothee

1.1k views

6 votes

2 answers

10

GATE CSE 1991 | Question: 12,b
Suppose a database consist of the following relations: SUPPLIER (SCODE,SNAME,CITY). PART (PCODE,PNAME,PDESC,CITY). PROJECTS (PRCODE,PRNAME,PRCITY). SPPR (SCODE,PCODE,PRCODE,QTY). Write algebraic solution to the following : Get SCODE values for ... both projects PR1 and PR2. Get PRCODE values for projects supplied by at least one supplier not in the same city.

jothee asked in Databases Apr 18, 2016

by jothee

1.3k views

32 votes

4 answers

11

GATE CSE 1991 | Question: 15,b
Consider the following first order formula: ... Does it have finite models? Is it satisfiable? If so, give a countable model for it.

ibia asked in Mathematical Logic Nov 16, 2015

by ibia

3.5k views

17 votes

5 answers

12

GATE CSE 1991 | Question: 17,a
Show that the Turing machines, which have a read only input tape and constant size work tape, recognize precisely the class of regular languages.

Arjun asked in Theory of Computation Nov 15, 2015

by Arjun

4.1k views

40 votes

3 answers

13

GATE CSE 1991 | Question: 16-b
Show that all vertices in an undirected finite graph cannot have distinct degrees, if the graph has at least two vertices.

Arjun asked in Graph Theory Nov 15, 2015

by Arjun

2.6k views

5 votes

0 answers

14

GATE CSE 1991 | Question: 6,b
Design a $1024$ bit serial-in/serial-out unidirectional shift register using a $1K\times 1 $bit RAM with a data input $D_{in}$, data output $D_{out}$ and control input $\text{READ}/\overline{\text{WRITE}}$. You may assume the availability of standard SSI and MSI components such as gates, registers and counters.

ibia asked in Digital Logic Nov 14, 2015

by ibia

486 views

52 votes

4 answers

15

GATE CSE 1991 | Question: 5-c
Find the maximum clock frequency at which the counter in the figure below can be operated. Assume that the propagation delay through each flip flop and each AND gate is $10\;\text{ns}$. Also, assume that the setup time for the $JK$ inputs of the flip flops is negligible.

ibia asked in Digital Logic Nov 14, 2015

by ibia

12.6k views

17 votes

2 answers

16

GATE CSE 1991 | Question: 5-b
Find the minimum sum of products form of the logic function $ f(A,B,C,D) = \Sigma_{m}(0,2,8,10,15)+ \Sigma _{d}(3,11,12,14)$ where $m$ and $d$ represent minterm and don't care term respectively.

ibia asked in Digital Logic Nov 14, 2015

by ibia

2k views

4 votes

2 answers

17

GATE CSE 1991 | Question: 01,xi
The arithmetic expression $(a+b) * c- d/e ** l$ is to be evaluated on a two address machine, where each operand is either a register or a memory location. With a minimum number of memory accesses of operands.the number of registers required to evaluate this expression is ______. The number of memory accesses of operands is ____________

ibia asked in Compiler Design Nov 14, 2015

by ibia

978 views

34 votes

8 answers

18

GATE CSE 1991 | Question: 17,b
Let $L$ be the language of all binary strings in which the third symbol from the right is a $1$. Give a non-deterministic finite automaton that recognizes $L$. How many states does the minimized equivalent deterministic finite automaton have? Justify your answer briefly?

Kathleen asked in Theory of Computation Sep 13, 2014

7.1k views

45 votes

2 answers

19

GATE CSE 1991 | Question: 16,a
Find the number of binary strings $w$ of length $2n$ with an equal number of $1's$ and $0's$ and the property that every prefix of $w$ has at least as many $0's$ as $1's.$

Kathleen asked in Combinatory Sep 13, 2014

3.8k views

14 votes

5 answers

20

GATE CSE 1991 | Question: 15,a
Show that the product of the least common multiple and the greatest common divisor of two positive integers $a$ and $b$ is $a\times b$.

Kathleen asked in Set Theory & Algebra Sep 13, 2014

1.1k views

21 votes

3 answers

21

GATE CSE 1991 | Question: 14,a
Consider the binary tree in the figure below: What structure is represented by the binary tree?

Kathleen asked in DS Sep 13, 2014

2.7k views

20 votes

5 answers

22

GATE CSE 1991 | Question: 13
Give an optimal algorithm in pseudo-code for sorting a sequence of $n$ numbers which has only $k$ distinct numbers ($k$ is not known a Priori). Give a brief analysis for the time-complexity of your algorithm.

Kathleen asked in Algorithms Sep 13, 2014

4.4k views

21 votes

6 answers

23

GATE CSE 1991 | Question: 12-a
Suppose a database consist of the following relations: SUPPLIER (SCODE,SNAME,CITY). PART (PCODE,PNAME,PDESC,CITY). PROJECTS (PRCODE,PRNAME,PRCITY). SPPR (SCODE,PCODE,PRCODE,QTY). Write SQL programs corresponding to the following queries: Print PCODE values for ... part to a project in the second city, but do not print the triples in which the two CITY values are same.

Kathleen asked in Databases Sep 13, 2014

2k views

6 votes

2 answers

24

GATE CSE 1991 | Question: 11,a
Consider the following scheme for implementing a critical section in a situation with three processes $P_i, P_j$ and $P_k$. Pi; repeat flag[i] := true; while flag [j] or flag[k] do case turn of j: if flag [j] then begin flag [i] ... j; flag [i] := false non-critical section until false; Does the scheme ensure mutual exclusion in the critical section? Briefly explain.

Kathleen asked in Operating System Sep 13, 2014

2.7k views

17 votes

2 answers

25

GATE CSE 1991 | Question: 10a
Consider the following grammar for arithmetic expressions using binary operators $-$ and $/$ which are not associative $E \rightarrow E -T\mid T$ $T \rightarrow T/F\mid F$ $F \rightarrow (E) \mid id$ ($E$ is the start symbol) Is the grammar ... what is the relative precedence between $-$ and $/$? If not, give an unambiguous grammar that gives $/$ precedence over $-$.

Kathleen asked in Compiler Design Sep 13, 2014

2.9k views

24 votes

3 answers

26

GATE CSE 1991 | Question: 09a
Consider the following pseudo-code (all data items are of type integer): procedure P(a, b, c); a := 2; c := a + b; end {P} begin x := 1; y := 5; z := 100; P(x, x*y, z); Write ('x = ', x, 'z = ', z); end Determine its output, if the parameters are passed to the Procedure $\text{P}$ by value reference name

Kathleen asked in Compiler Design Sep 13, 2014

2.3k views

1 vote

0 answers

27

GATE CSE 1991 | Question: 08,a,b

Kathleen asked in CO and Architecture Sep 13, 2014

321 views

2 votes

0 answers

28

GATE CSE 1991 | Question: 07a
It is required to design a hardwired controller to handle the fetch cycle of a single address CPU with a $16$ bit instruction-length. The effective address of an indexed instruction should be derived in the fetch cycle itself. ... bits of an instruction constitute the operand field. Give the register transfer sequence for realizing the above instruction fetch cycle.

Kathleen asked in CO and Architecture Sep 13, 2014

461 views

3 votes

2 answers

29

GATE CSE 1991 | Question: 06,a
Using $\text{D}$ flip-flop gates, design a parallel-in/serial-out shift register that shifts data from left to right with the following input lines: Clock $\text{CLK}$ Three parallel data inputs $A, B, C$ Serial input $S$ Control input $\text{load} / \overline{\text{SHIFT}}$.

Kathleen asked in Digital Logic Sep 13, 2014

640 views

22 votes

1 answer

30

GATE CSE 1991 | Question: 5-a
Analyse the circuit in Fig below and complete the following table ${\begin{array}{|c|c|c|}\hline \textbf{a}& \textbf{b}& \bf{ Q_n} \\\hline 0&0\\\ 0&1 \\ 1&0 \\ 1&1 \\ \hline \end{array}}$

Kathleen asked in Digital Logic Sep 13, 2014

2.7k views

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