# What is interleaving of strings?

## What is interleaving of strings?

C is said to be interleaving A and B, if it contains all and only characters of A and B and order of all characters in individual strings is preserved. For example, let the given string be A and the other strings be B and C. Let A = “XXY”, string B = “XXZ” and string C = “XXZXXXY”.

### Can two strings S1 and S2 be interleaved into S3?

Problem Note: S3 is said to be interleaving S1 and S2 if it contains all characters of S1 and S2 and the order of all characters in individual strings is preserved.

What is interleaving in Java?

Interference happens when two operations, running in different threads, but acting on the same data, interleave. This means that the two operations consist of multiple steps, and the sequences of steps overlap.

How do you check if a string is valid in shuffle of two strings?

Sort the string str and Compare str and str1. If str = str1, then string str1 is a shuffled substring of string str2. else repeat the above process till ith index of str2 such that (i – n + 1 > m)(as after this index the length of remaining string str2 will be less than str1.

## Why are strings immutable in Java?

The String is immutable in Java because of the security, synchronization and concurrency, caching, and class loading. The reason of making string final is to destroy the immutability and to not allow others to extend it. The String objects are cached in the String pool, and it makes the String immutable.

### What is dynamic programming problem?

Dynamic Programming (commonly referred to as DP) is an algorithmic technique for solving a problem by recursively breaking it down into simpler subproblems and using the fact that the optimal solution to the overall problem depends upon the optimal solution to it’s individual subproblems.

How do you interleave two strings in python?

How to Interleave Two Strings of Variable Lengths (Python)?

1. Input: String s1= “AAA” and string s2 = “BBBBB”
2. Output: String s=”ABABABBB”

How do you check if a string is substring of another?

Simple Approach: The idea is to run a loop from start to end and for every index in the given string check whether the sub-string can be formed from that index. This can be done by running a nested loop traversing the given string and in that loop run another loop checking for sub-string from every index.

## How do you check if a string is a substring of another Python?

You can use the in operator or the string’s find method to check if a string contains another string. The in operator returns True if the substring exists in the string. Otherwise, it returns False. The find method returns the index of the beginning of the substring if found, otherwise -1 is returned.

### What is difference between immutable and final?

final means that you can’t change the object’s reference to point to another reference or another object, but you can still mutate its state (using setter methods e.g). Whereas immutable means that the object’s actual value can’t be changed, but you can change its reference to another one.

Is String is thread safe in Java?

Every immutable object in Java is thread safe ,that implies String is also thread safe . String can not be used by two threads simultaneously. String once assigned can not be changed.