11AE-CSC60-SBQ-practice2

Which of the following statements is true about the if statement?

• The if statement can have only one condition that evaluates to an integer value.

• The if block is optional.

• The else block is optional.

• The if and else blocks should always be included within curly braces.

Which of the following is the correct syntax for an if statement?

• if (x < 10) { size = "Small"; } else (x < 20) { size = "Medium"; }

• if (x < 10); { size = "Small"; } else (x < 20) { size = "Medium"; }

• if (x < 10)

  { size = "Small";

  }

  else

  {

  size = "Medium";

  }

• if { size = "Small"; } else (x < 20) { size = "Medium"; }

Assuming that the user provides 99 as input, what is the output of the following code snippet? int a; int b; a = 0; Scanner in = new Scanner(System.in); System.out.print("Please enter a number: "); b = in.nextInt(); if (b > 300) { a = b; } else { a = 0; } System.out.println("a: " + a);

• a: 0
• a: 99
• a: 100
• a: 300

The following code snippet contains an error. What is the error? if (cost > 100); { cost = cost – 10; } System.out.println("Discount cost: " + cost);

• Syntax error (won’t compile)
• Logical error: use of an uninitialized variable
• Logical error: if statement has do-nothing statement after if condition
• Logical error: assignment statement does not show equality

What kind of operator is the <= operator?

• Ternary
• Arithmetic
• Inequality
• Relational

Which of the following operators is used as a relational operator?

• =<
• <=
• =
• !

The operator !> stands for

• not less than
• not greater than.
• not equal to.
• this is not an operator in Java

What is the output of the following code snippet if the input is 25? int i = 0; Scanner in = new Scanner(System.in); System.out.print("Enter a number: "); i = in.nextInt(); if (i > 25) { i++; } else { i--; } System.out.print(i);

• 24
• 25
• 26
• 27

Assuming that a user enters 25 as the value for x, what is the output of the following code snippet? int x = 0; Scanner in = new Scanner(System.in); System.out.print("Enter a number: "); x = in.nextInt(); if (x < 100) { x = x + 5; } if (x < 500) { x = x - 2; } if (x > 10) { x++; } else { x--; } System.out.println(x);

• 27
• 28
• 29
• 30

A store provides 10 percent discount on all items with a price of at least $100. No discount is otherwise applicable. Which of the following DOES NOT correctly compute the discount?

• double discount = 0; if (price >= 100) { discount = 0.10 * price; }
• double discount = 0.10 * price; if (price <= 100) { discount = 0; }
• double discount; if (price < 100) { discount = 0; } else { discount = 0.10 * price; }
• double discount = 10; if (price >= 100) { discount = 0.1 * price; } else { discount = 0; }