B4 - Variables and the Assignment Statement

Which one of the following is a reserved word?

• apple

• 7up

• grandTotal

• boolean

Which one of the following is NOT a correct variable name?

• 2bad

• zero

• theLastValueButOne

• year2000

Which one of the following declarations is NOT correct?

• double duty;

• float loan;

• boolean value = 12;

• int start = 34, end = 99;

What does the following program output?

class question4 { 

public static void main ( String[] args ) {
int unitCost = 8;
int items = 5; 
System.out.println("total cost: " + (unitCost * items) ); 
}
}

• total cost: + 40

• total cost: 8*5

•  total cost: 40

•  "total cost: " 40

Which of the following shows the syntax of an assignment statement?

• variableName = expression;

• expression = expression;

• expression = variableName;

• dataType = variableName;

What are the two steps that take place when an assignment statement is executed?

• (i) Evaluate the Expression, and (ii) Store the value in the variable.

• (i) Store the value in the variable, and (ii) Evaluate the Expression.

• (i) Reserve memory , and (ii) fill it with a number.

• (i) Evaluate the variable, and (ii) store the results.

What is an expression?

• The same thing as a statement.

• An expression is a list of statements that make up a program

• An expression is a combination of literals, operators, variables, and parentheses used to calculate a value.

• An expression is a number expressed in digits.

Which one of the following expressions is NOT correct?

• 5 + 4

• (5 * 4)/2

• (-12 + (13 + 7)/2 ) * 4

• -12 + (13 + 7)/2 ) * 4

Which of the following expressions is NOT correct?

• (34 - 86) / 3

• (34 - 86) / -3

• 34 - 86) / (23 - 3 )

• ( (34 - 86) / (23 + 3 ) )

What is the value of the following expression: $\left(2-6\right)\ \ \div\ 2+9$  

• 7

• 8

• 9

• 10