2nd October 2019

btechsmartclass

What is space and time complexity in data structure?

Space complexity of an algorithm can be defined as follows Total amount of computer memory required by an algorithm to complete its execution is called as space complexity of that algorithm. Generally, when a program is under execution it uses the computer memory for THREE reasons.

Also asked, what is space and time complexity?

Time complexity is a function describing the amount of time an algorithm takes in terms of the amount of input to the algorithm. Space complexity is a function describing the amount of memory (space) an algorithm takes in terms of the amount of input to the algorithm.

What does it mean to have O 1 space?

a space complexity of O(1) means that the space required by the algorithm to process data is constant; it does not grow with the size of the data on which the algorithm is operating.

What is auxiliary space complexity?

The term Space Complexity is misused for Auxiliary Space at many places. Space Complexity of an algorithm is total space taken by the algorithm with respect to the input size. Space complexity includes both Auxiliary space and space used by input.

What is complexity of sorting algorithms?

Time Complexities of all Sorting Algorithms

Algorithm	Time Complexity
	Best	Average
Bubble Sort	Ω(n)	θ(n^2)
Insertion Sort	Ω(n)	θ(n^2)
Heap Sort	Ω(n log(n))	θ(n log(n))

What is an auxiliary space?

Auxiliary Space is the extra space or temporary space used by an algorithm. Space Complexity of an algorithm is total space taken by the algorithm with respect to the input size. Space complexity includes both Auxiliary space and space used by input.

What is the asymptotic complexity?

asymptotic time complexity. (definition) Definition: The limiting behavior of the execution time of an algorithm when the size of the problem goes to infinity. This is usually denoted in big-O notation. See also asymptotic space complexity.

What is the time complexity of heap sort?

Array Sorting Algorithms

Algorithm	Time Complexity
	Best	Worst
Heapsort	Ω(n log(n))	O(n log(n))
Bubble Sort	Ω(n)	O(n^2)
Insertion Sort	Ω(n)	O(n^2)

Why Quicksort is more efficient than merge sort?

Quicksort is NOT better than mergesort. With O(n^2) (worst case that rarely happens), quicksort is potentially far slower than the O(nlogn) of the merge sort. Quicksort has less overhead, so with small n and slow computers, it is better.

What is heap and its types?

A binary heap is a complete binary tree which satisfies the heap ordering property. The ordering can be one of two types: the min-heap property: the value of each node is greater than or equal to the value of its parent, with the minimum-value element at the root.

What are the properties of heap?

(definition) Definition: Each node in a tree has a key which is more extreme (greater or less) than or equal to the key of its parent. Specialization ( is a kind of me.) max-heap property, min-heap property.

What is the difference between the stack and the heap?

Stack is used for static memory allocation and Heap for dynamic memory allocation, both stored in the computer's RAM . Variables allocated on the stack are stored directly to the memory and access to this memory is very fast, and it's allocation is dealt with when the program is compiled.

Why is the stack faster than the heap?

The stack is faster because the access pattern makes it trivial to allocate and deallocate memory from it (a pointer/integer is simply incremented or decremented), while the heap has much more complex bookkeeping involved in an allocation or free.

What is the difference between a process and a thread?

Threads are used for small tasks, whereas processes are used for more 'heavyweight' tasks – basically the execution of applications. Another difference between a thread and a process is that threads within the same process share the same address space, whereas different processes do not.

What are the threads?

In computer science, a thread of execution is the smallest sequence of programmed instructions that can be managed independently by a scheduler, which is typically a part of the operating system.

Do threads have their own stack?

It is important to distinguish between these two types of process memory because each thread will have its own stack, but all the threads in a process will share the heap. Threads are sometimes called lightweight processes because they have their own stack but can access shared data.

Do threads have their own registers?

A thread has its own register set and stack while shares code and global data with other threads of the same process. Any process, yes I mean process, not thread, running the same code can share the same piece because the code will not change during runtime.

How many threads are in a core?

3 Answers. You have 4 CPU sockets, each CPU can have, up to, 12 cores and each core can have two threads. Your max thread count is, 4 CPU x 12 cores x 2 threads per core, so 12 x 4 x 2 is 96.

What does 2 cores and 4 threads mean?

It means that the CPU has 2 physical cores but can process 4 threads simultaneously through hyper threading or Simultaneous multithreading (SMT). In reality, one physical core can only truly run one thread at a time, but using hyper threading, the CPU exploits the idle stages in the pipeline to process another thread.

How many threads does Intel Core i7 have?

A Core i3 with Hyper-Threading can process two threads per core which means a total of four threads can run simultaneously. The current Core i5 range of desktop processors doesn't have Hyper-Threading so can also only process four cores. i7 processors do have it, so can process eight threads at once.

Is an i7 processor good for gaming?

A good gaming rig doesn't need the most expensive CPU. Intel's Core i5-8400 is the best gaming CPU in years. It delivers performance on-par or better than last generation's i7 parts at a much more affordable price point. Intel has updated its CPUs and chipsets as well, making it easier to build affordable systems.

How many cores are in an i7?

Core i3 processors have two cores, Core i5 CPUs have four and Core i7 models also have four. Some Core i7 Extreme processors have six or eight cores. Generally speaking, we find that most applications can't take full advantage of six or eight cores, so the performance boost from extra cores isn't as great.

Is the i7 6700 quad core?

The Core i7-6700 3.4 GHz Quad-Core Processor from Intel is the sixth generation of the Core i7 product line that is now built using Skylake architecture.

Is a Core i5 good for gaming?

The Core i5 6600K is the unlocked version and recommended for gaming, overclocking and futureproofing. Just know that you need a minimum of 3.0 ghz for most games these days, and for some demanding games like metal gear solid they have an i7 class instead of the i5, the reason being 4+4 cores at 3.3 Ghz or above.

What is space and time complexity in data structure?

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