shider @shiderdev

What will the #java17 code print in the console? 🄰 true false false true true 🄱 true true false true true 🄲 true false true true false 🄳 true true false true false 🄴 compile error

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🄱 25, 26 - don't compile because we get int[] in the params instead of int[][] 🄲 29 - one array of length 2 and another with length 3 passed as varargs 30 - same as 29 but passed as int[][] (acceptable for varargs but not the other way around) varargs length is 2 for both

On line 33 "int[]..." means that we expect between 0 and many arguments of type int array which translates to a two-dimensional int array (int[][]) 🄰 23 - passing nothing will create an array of length 0 24 - null will compile but causes runtime err because we call null.length()

What lines won't compile? 🄰 23, 24 🄱 25, 26 🄲 29, 30 🄳 Only runtime errors 🄴 No errors #javacertification

Ⓓ 20 - compiles fine. We use + as a binary operator. It's evaluated from left to right. If one of the operands is a string then both are converted to strings and concatenated: Mike is 411 years old 😅😅

Ⓑ 17 - we didn't assign value when declaring name so we can do it here (must do a single assignment before using it) Ⓒ 18 - is final but is a reference var and we can change the object it's pointing to as long as it is mutable

What lines of #java code have compile errors? Ⓐ 12, 13 Ⓑ 13, 17 Ⓒ 18 Ⓓ 20 Ⓔ 16, 20 Ⓕ No errors #100daysofcoding

ⓐ We can reference a private field because the static method is inside the class ⓑ is not the cause because instance initializers run before the constructor ⓒ The instance initializer creates its scope and variables declared inside are not visible outside

Why is line 5 causing a compile error? ⓐ name is a private field ⓑ name is referenced before it's declaration ⓒ name is not visible outside of the block scope ⓓ line 5 compiles correctly but name is not declared correctly on line 8 #javacertification #100daysofcoding

@MentorWebDev D

@natmiletic I will never forgive Microsoft for ruining this one. 💔Nokia Lumia 720

This is a #javascript solution with the merge sort algorithm for the #leetcode question 912 - "sort an array"

@itsmintski Correct, the number 190 is considered an integer and after the cast to (byte) it overflows to the value -66. That's the trick here :))

What will the #java code below print? This is a switch expression compiled for #java17? Ⓐ 4 Ⓑ 1 Ⓒ 10 Ⓓ Code does not compile #100daysofcoding #javacertification

This one is easy 💪 What will the #java code below print? #java17 Ⓐ 1-1 Ⓑ -1 Ⓒ 0 Ⓓ 10 Ⓔ infinite loop Ⓕ error #100daysofcoding #javacertification

@MentorWebDev A)