(6) If L is context free, then LU¬L must be regular. O True O False

haskell question

Compute the weakest precondition for each of the following assignment statements and their postconditions: a = 2 * (b - 1) 1 {a > 0} а. b. b = (c + 10) / 3 {b > 6} a = a + 2 * b 1 {a > 1} C. d. X = 2 * y + x - 1 {x > 11}

Question 7 Which of the following statements are TRUE? (Check all that apply) There are exactly two distinct semantics models for formal parameters: in and inout There are two conceptual models of how data transfers take place in parameter transmission: Either an actual value is copied (to the caller, to the called, or both ways) or an access path is transmitted. Some languages such as Python allow subprograms to return more than one value. Contemporary software-engineering principles dictate that access by subprogram code to data outside the subprogram should be maximized In most contemporary languages, parameter communication takes place through the heap

Create the UML Diagram for this java code import java.util.Scanner; interface Positive{    void Number();} class Square implements Positive{    public void Number() {        Scanner in=new Scanner(System.in);        System.out.println("Enter a number: ");        int a = in.nextInt();            if(a>0) {                System.out.println("Positive number");            }            else {                System.out.println("Negative number");            }            System.out.println("\nThe square of " + a +" is " + a*a);            System.out.println("\nThe cubic of "+ a + " is "+ a*a*a);    }} class Sum implements Positive{    public void Number() {        Scanner in = new Scanner(System.in);            System.out.println("\nEnter the value for a: ");            int a = in.nextInt();            System.out.println("Enter the value for b" );            int b= in.nextInt();            System.out.printf("The Difference of two numbers: %d\n", a-b);            System.out.printf("The…

a) Compute the weakest precondition for each of the following assignment statements and post conditions: i) a = 2 * (b + 1) ii)b = 1 {a > 0} 2) / 3 {b > 2} - (c -

Assume the following rules of associativity and precedence for expressions: Precedence Highest *, /, not +, -, &, mod - (unary) =, /=, =, > and Lowest or, xor Left to right Associativity Show the order of evaluation of the following expressions by parenthe- sizing all subexpressions and placing a superscript on the right parenthe- sis to indicate order. For example, for the expression а +b* с + d the order of evaluation would be represented as ( (a + (b * c)')² + d)³ а. а * b 1 + C b. a (b - 1) / c mod d с. (а b) / с & (а * е / а - 3) d. -a or c = d and e е. а > b хоr c or d <3 17 f. -a + b

(5) Which of the following is true regarding the Recursive languages: a) Proper subset of CFL b) Always recognizable by PDA c) Also called type (0) languages d) Recognizable by TM

How to code for user input in Java programming language?

I don't really know where to start.