11AE-CSC60-SBQ1

1) What are the two parts of an if statement?

• a) A condition and a body
• b) A check and an increment
• c) An increment and a body
• d) An increment and a return value

2) 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.

3) Which of the following statements is correct about an if statement?

• You must use braces if the body of an if statement contains only a single statement.
• You can omit an else statement if there is no task defined in the else branch.
• You cannot use braces if the body of an if statement contains only a single statement.
• The number of opening braces can be different from the number of closing 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 303 as input, what is the output of the following code snippet? int x; int y; x = 0; Scanner in = new Scanner(System.in); System.out.print("Please enter a number: "); y = in.nextInt(); if (y > 300) { x = y; } else { x = 0; } System.out.println("x: " + x);

• x: 0
• x: 300
• x: 303
• There is no output due to compilation errors.

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 can be done to improve the following code fragment? if ((counter % 10) == 0) { System.out.println("Counter is divisible by ten: " + counter); counter++; } else { System.out.println("Counter is not divisible by ten: " + counter); counter++; }

• Move the duplicated code outside of the if statement
• Shorten variable names
• Move the brackets to save several lines of code
• Add semicolons after the if condition and the else reserved word

What kind of operator is the <= operator?

• Ternary
• Arithmetic
• Inequality
• Relational

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

• =<
• <=
• =
• !