Answer to Question #168786 in Java | JSP | JSF for Lucy

Question

State whether each of the following is true or false. If false, explain why.

a). An algorithm is a procedure for solving a problem in terms of the actions to execute and the order in which these actions execute.

b). A set of statements contained within a pair of parentheses is called a block.

c). A selection statement specifies that an action is to be repeated while some condition remains true.

d). A nested control statement appears in the body of another control statement.

e). Java provides the arithmetic compound assignment operators +=, -=, *=, /= and %= for abbreviating assignment expressions.

f). The primitive types (boolean, char, byte, short, int, long, float and double) are portable across only Windows platforms.

g).Specifying the order in which statements (actions) execute in a program is called program control.

h). The unary cast operator (double) creates a temporary integer copy of its operand.

i). Instance variables of type boolean are given the value TRue by default.

j).Pseudocode helps a programmer think out a program before attempting to write it in a programming language.

Write four different Java statements that each add 1 to integer variable x.

Answer 1

a). An algorithm is a procedure for solving a problem in terms of the actions to execute and the order in which these actions execute.

True

b). A set of statements contained within a pair of parentheses is called a block.

False. A set of statements enclosed in curly braces is called a block.

c). A selection statement specifies that an action is to be repeated while some condition remains true.

False. The select statement indicates what action should be performed if some condition is true, and what should happen if the condition is not true.

d). A nested control statement appears in the body of another control statement.

True

e). Java provides the arithmetic compound assignment operators +=, -=, *=, /= and %= for abbreviating assignment expressions.

True

f). The primitive types (boolean, char, byte, short, int, long, float and double) are portable across only Windows platforms.

False. Primitive types are platform independent since Java is a platform independent programming language.

g).Specifying the order in which statements (actions) execute in a program is called program control.

True

h). The unary cast operator (double) creates a temporary integer copy of its operand.

False.The unary cast operator (double) converts the variable or expression following it to double

i). Instance variables of type boolean are given the value TRue by default.

False. A boolean variable needs to be initialized, by default it does not contain anything.

j).Pseudocode helps a programmer think out a program before attempting to write it in a programming language.

True

x += 1;
x = x + 1;
x++;
++x;