9781111969752_TB_ch04 - Chapter 13 System Modeling with the...

Info icon This preview shows pages 1–3. Sign up to view the full content.

Chapter 4: Making Decisions TRUE/FALSE 1. Every decision you make in a computer program involves evaluating a Boolean expression. ANS: T PTS: 1 REF: 122 2. In any Boolean expression, the two values compared can be either variables or constants. ANS: T PTS: 1 REF: 126 3. Any decision can be made using combinations of just two types of comparisons: equal and not equal. ANS: F PTS: 1 REF: 127 4. Most programming languages allow you to ask two or more questions in a single comparison. ANS: T PTS: 1 REF: 134 5. A short-circuit evaluation is where each part of an expression is evaluated only as far as necessary to determine whether the entire expression is true or false. ANS: T PTS: 1 REF: 135 6. When you need to satisfy two or more criteria to initiate an event in a program, you must make sure that the second decision is made entirely independently of the first decision. ANS: F PTS: 1 REF: 136 7. Besides AND and OR operators, most languages support a NOT operator. ANS: T PTS: 1 REF: 147 8. Most programming languages limit the number of AND and OR operators in an expression. ANS: F PTS: 1 REF: 154 9. When you combine AND and OR operators, the OR operators take precedence, meaning their Boolean values are evaluated first. ANS: F PTS: 1 REF: 154 10. You can use parentheses to override the default order of operations. ANS: T PTS: 1 REF: 156 MULTIPLE CHOICE 1. A selection with an action that is associated with each of two possible outcomes is known as a(n) ____ selection. a. unary c. octal
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

b. binary d. semiconductor ANS: B PTS: 1 REF: 122 2. The keyword that is NOT included in a single-alternative selection is ____. 3. Boolean expressions are named after ____. 4. ____ operators require two operands. 5. The ____ sign means “greater than.” a. < c. <= b. = d. > ANS: D PTS: 1 REF: 126 6. Usually, ____ variables are not considered to be equal unless they are identical. 7. When you ask multiple questions before an outcome is determined, you create a ____ condition. 8. A(n) ____ decision is a decision in which two conditions must be true for an action to take place.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.
  • Fall '15
  • Logic, pts, REF, George Boole

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern