React Native developer

You are given a Singly Linked List of integers. Return true if it has a cycle, else return false.

A cycle occurs when a node's next points back to a previous node in the list.

Example:

In the given linked list, there is a cycle, hence we return true.

Given a string 'S' of length 'L', return the length of the longest substring without repeating characters.

Example:

Suppose given input is "abacb", then the length of the longest substring without repeating characters will be 3 ("acb").

What is the default layout system in React Native?
A. Grid Layout
B. Flexbox
C. Float-based Layout
D. CSS Grid

Which library is commonly used for navigation in React Native?
A. React-Router
B. React-Native-Navigator
C. React-Navigation
D. React-Router-Native

What is the default value of the position property in CSS?
A) static
B) relative
C) absolute
D) fixed

Which component is used to create a scrollable container in React Native?
 

What is the purpose of SafeAreaView in React Native?
A. To create a responsive layout
B. To avoid overlapping with device notches and status bars
C. To handle scrolling
D. To optimize app performance

You are given an array/list ‘BINARYNUMS’ that consists of ‘N’ distinct strings which represent all integers from 0 to N in binary representation except one integer. This integer between 0 to ‘N’ whose binary representation is not present in list ‘BINARYNUMS’ is called ‘Missing Integer’.

Your task is to find the binary representation of that ‘Missing Integer’. You should return a string that represents this ‘Missing Integer’ in binary without leading zeros.

Note

1. There will be no leading zeros in any string in the list ‘BINARYNUMS’.

Example:

Consider N = 5 and the list ‘binaryNums’=  [“0”, “01”, “010”, “100”, “101”].  This list consists of the binary representation of numbers [0, 1, 2, 4, 5]. Clearly, the missing number is 3 and its binary representation will be “11”. So you should return string “11”.

You have been given a long type array/list 'arr’ of size 'n’.

It represents an elevation map wherein 'arr[i]’ denotes the elevation of the 'ith' bar.

Print the total amount of rainwater that can be trapped in these elevations.

Note :

The width of each bar is the same and is equal to 1.

Example:

Input: ‘n’ = 6, ‘arr’ = [3, 0, 0, 2, 0, 4].

Output: 10

Explanation: Refer to the image for better comprehension:

Note :

You don't need to print anything. It has already been taken care of. Just implement the given function.

What are the different types of joins in SQL? Explain with examples. (Learn)

Design a simple file system that handles file storage, file retrieval, and directory management. The system should allow basic file operations such as creating, reading, writing, and deleting files. Additionally, it should support directory creation and listing the contents of a directory.

What is the purpose of useEffect and useState hooks in React Native?

You are given a FlatList in React Native that renders an array of numbers. However, when the user taps on an item, the list should reverse its order, and the tapped item should also be highlighted (e.g., by changing its background colour).

Which file contains the entry point of a React Native application?

What is the purpose of the useMemo hook in React Native? (Learn)