lupikovoleg/react-native-junior-developer-interview

Junior React Native developer interview

1. Job experience

   • React
   • React Native

2. Javascript basics

   • Context, Bind, Call, Apply

     const obj = {
         foo: 'bar',
         arrowFunc: () => {
             console.log('1.foo = ', this);
         },
         func() {
             console.log('2.foo = ', this.foo);
             return () => {
                 console.log(this);
             };
         },
     };
     
     obj.arrowFunc(); // 1.
     obj.func(); // 2.
     obj.func()(); // 3.

   • Hoisting

     console.log('test var ', testvar);
     console.log('test const ', testconst);
     console.log('test let ', testlet);
     var testvar = 'foo';
     const testconst = 'const';
     let testlet = 'let';
     
     const a = 'a';
     
     const func = () => {
         console.log(a);
         const a = 'test';
     };
     
     func();

   • Closures

     for (var i = 0; i < 10; i++) {
         setTimeout(() => {
             console.log(i);
         }, 0);
     }

   • Event Loop

   • Pure functions

3. Typescript

   • Return type of function
   • How to get interface field type
   • Conditionals types

4. React / React Native

   • React Hooks
     • UseEffect
     • UseCallback
     • UseRef
     • UseState
     • UseMemo
     • UseLayoutEffect
   • React.memo HOK
   • Pure components

5. Git

   • Commit ammend
   • Rebase vs Merge
   • Cherry pick

6. Algorithm tasks

   • Left only uniq values in array

     Link

   • Find index of the first uniq char

     Link

---