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Made Easy
Amy and Bob are working on a project vehicle rental system, they have a file consisting of 10000 records, having block size 1024 bytes, record size 100 bytes. Search key size 9 bytes, pointer 7 bytes. They want to implement single level indexing. ... dense index, however Amy suggested to implement sparse index. How many blocks are saved by Amy considering only 1st level index ________?

commented in Databases Dec 9, 2023

430 views

2 answers

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Unacademy practice question from OS
#include <stdio.h> void main() { int i = 3; while(i>0) { i--; if(fork()||fork()) { printf("Hi"); } } } How many times “Hi” will be printed ?? #include <stdio.h> void main() { int i = 2; while(i>0) { i--; if(fork()||fork()) { printf("Hi"); } } } How many times “Hi” will be printed ??

commented in Operating System Aug 19, 2023

881 views

2 answers

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OS handout
For following code how many times the '*' will printed? main() { int i,n ; for(i = 1 ; i<=n ; ++i) { fork(); printf("*"); } }

answer edited in Operating System Aug 18, 2023

806 views

2 answers

4

Theory of computation Self doubt
Construct NFA for the set of strings Σ={0, 1} of alternate 0's and 1's

answered in Theory of Computation Jul 1, 2023

237 views

1 answer

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Andrew S. Tanenbaum (OS) Edition 4
A computer provides each process with 65536 bytes of address space divided into pages. A particular program has a text size of 32768 bytes, a data size of 16386 bytes, and a stack size of 15870 bytes. What is the maximum page size in bytes such ... the given address space? Each page must contain either text, data, or stack, not a mixture of two or three of them.

commented in Operating System Jun 30, 2023

420 views

1 answer

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Asked in NIMCET Exam 2010
A main memory has an access time of 45 ns. A 5 ns time gap is necessary for the completion of one access to the beginning of the next access. The bandwidth of the memory (a) 25 MHz (b) 20 MHz (c) 40 MHz (d) 50 MHz

commented in CO and Architecture Jun 30, 2023

564 views

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Memory Allocation, Garbage Value
Data is never actually deleted from computer, even after freeing (say, a dynamically allocated variable) the variable still has that value which was given to it, we just can not access that memory, until that memory is allocated again somewhere else and ... of the system with a 0 at some point of time (say, creation) to totally avoid the hassle of garbage values?

commented in Compiler Design Jun 29, 2023

331 views

2 answers

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CN: Circuit switching vs packet switching
Which of the statements are correct? a.:) Circuit switching uses dedicated Link and all packets follow same path b:) Virtual switching uses virtual curcuit switch and all packets follow same path c:) Circuit switching uses dedicated Link and packets may follow different path d) both a and b

commented in Computer Networks Jun 10, 2023

2.2k views

1 answer

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Circuit switching

answered in Computer Networks Jun 9, 2023

442 views

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TLB with fault rate.
consider a paging system uses 1 level page table residing in RAM and TLB. RAM access time is 55 ns while TLB lookup takes 17 ns. Each page transfer takes upto 4700 ns to/from swap space. Miss ratio of TLB is 95% and Page fault ratio is 33%. Calculate the EMAT when TLB update time is negligible.

answer edited in Operating System May 15, 2023

637 views

1 answer

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Operating System
What is the relationship between paging and virtual memory? A Virtual memory came before paging B When pages are created in disks, it is called a virtual memory? C Virtual memory can never be implemented without paging D Both have the same concepts

answered in Operating System May 14, 2023

400 views

1 answer

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Ace Test Series
Consider six files: F1, F2, F3, F4, F5, F6 with corresponding sizes 100, 200, 70, 40, 250 and 50 respectively. the files are to be stored on a sequential device in such a way that as to optimize access time. In what order should the files be stored ?? A) ... approximate average access time of a record from one of the six files on the sequential device?? A) 131 B) 198 C) 286 D) 433

answered in Operating System May 14, 2023

360 views

2 answers

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GO Classes 2023 | IIITH Mock Test 1 | Question: 26
Four processes- $\text{P}_1, \text{P}_2, \text{P}_3,$ and $\text{P}_4-$ ... -job-first scheduling algorithm, what is the average waiting time for the four processes, in seconds? $2$ $3$ $4$ $5$

answered in Operating System May 14, 2023

967 views

1 answer

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In the UNIX environment what happens in the following three cases as shown in Fig. 1.

answered in Operating System May 14, 2023

455 views

1 answer

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Synchronization problem on single processor cpu
Consider the following multi threaded code. volatile static int flag1= 0, flag2= 0; // code for thread 1 (or T1) flag1 = 1; if (flag2==0) code1(); // end of code for T1 // code for thread 2 (or T2) flag2 = 1; if ( ... (). no method is invoked. both methods cannot be invoked! Also, what will be the answer if we remove the volatile type from the flags.

answered in Operating System May 14, 2023

378 views

2 answers

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GATE CSE 2023 | Question: 28
Consider the two functions $\textsf{incr}$ and $\textsf{decr}$ shown below. incr(){ decr(){ wait(s); wait(s); X = X+1; X = X-1; signal(s); signal(s); } } There are $5$ threads each invoking $\textsf{incr}$ once, and $3$ threads each ... of the following choices corresponds to the minimum possible values of $\text{V1, V2},$ respectively? $15,7$ $7,7$ $12,7$ $12,8$

answer selected in Operating System May 7, 2023

11.8k views

3 answers

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ER Diagram: What is the cardinality of this relationship? is m-n cardinality correct? if not, why?
What is the cardinality of this relationship? is m-n cardinality correct? if not, why?

answered in Databases Mar 3, 2023

1.3k views