week 5 cs 2433

• What is the index of the last element?

  int numList[50];

  
  

  49

  Unknown, because the array has not been initialized.

  50

  0


  49
• Given x = 4 and y = 8, what are the ending values of x and y?

  x = y;

  y = x;

  x = y;

  
  

  x = 8, y = 4

  x = 4, y = 4

  x = 8, y = 8

  x = 4, y = 8

  x = 8, y = 8
• Which assigns the vector's last element with 99?

  vector myVector(15);

  
  

  myVector.at(16) = 99;

  myVector.at(0) = 99;

  myVector.at(15) = 99;

  myVector.at(14) = 99;

  myVector.at(14) = 99;
• Given two vectors, studentNames that maintains a list of students, and studentScores that has a list of the scores for each student, which XXX and YYY prints out only the student names whose score is above 80? Choices are in the form XXX/ YYY.

  
  

  vector studentNames(NUM_STUDENTS);

  vector studentScores(NUM_STUDENTS);

  unsigned int i;

  for (i = 0; i < studentScores.size(); ++i) {

  if (XXX > 80) {cout << YYY << " ";

  }

  }

  
  

  studentScores.at(i) / studentScores.at(i)

  studentNames.at(i) / studentScores.at(i)

  studentScores.at(i) / studentNames.at(i)

  studentNames.at(i) / studentNames.at(i)


  studentScores.at(i) / studentNames.at(i)
• Which best describes what is output?

  Assume v is a large vector of ints.

  int i;

  int s;

  s = v.at(0);

  for (i = 0; i < v.size(); ++i) {

  if (s > v.at(i)) {

  s = v.at(i);

  }}

  cout << s;

  
  

  max value in v

  min value in v

  last value in v

  first value in v

  min value in v
• Which evaluates to true for the string str = "beta123"?

  
  

  islower(str[1])

  isspace(str[2])

  isalpha(str[4])

  isdigit(str[0])

  islower(str[1])
• Given two same-sized integer vectors prevValues and newValues. Which assigns eq with 1 if the vectors are equal, and 0 otherwise. Choices are in the form XXX / YYY / ZZZ.

  if (XXX) {

  YYY;

  }

  else {

  ZZZ;

  }

  
  

  prevValues = newValues / eq = 1 / eq = 0

  prevValues == newValues / eq = 0 / eq = 1

  prevValues = newValues / eq = 0 / eq = 1

  prevValues == newValues / eq = 1 / eq = 0


  prevValues == newValues / eq = 1 / eq = 0
• Which XXX outputs all the elements of vector myVals?

  for (i = 0; XXX; ++i) {

  cout << myVals.at(i) << " ";

  }

  
  

  i <= myVals.size();

  No such expression as the number of elements is unknown.

  i < myVals.size;

  i < myVals.size();

  i < myVals.size();
• The numNegatives variable counts the number of negative values in the vector userVals. What should numNegatives be initialized to?

  vector userVals(20);

  unsigned int i;

  numNegatives = XXX;

  for (i = 0; i < userValues.size(); ++i) {

  if (userValues.at(i) < 0) {

  numNegatives = numNegatives + 1;

  }

  }

  
  

  0

  No initialization needed

  userVals.at(0)

  1

  0
• Given array scorePerQuiz has 10 elements. Which assigns element 7 with the value 8?

  
  

  scorePerQuiz = 8;

  scorePerQuiz[8] = 7;

  scorePerQuiz[7] = 8;

  scorePerQuiz[0] = 8;

  scorePerQuiz[7] = 8;
• What are the ending values in itemCount?

  vector itemCount;itemCount.push_back(6);itemCount.push_back(7);itemCount.push_back(8);itemCount.pop_back();

  
  

  6, 7, 0

  6, 7

  7, 8

  6, 7, 8

  6, 7
• For the given program, which XXX iterates through the vector to find the state that is input (userState) until a match is found?

  vector stateNames(NUM_STATES);vector statePop(NUM_STATES);string userState;bool foundState = false;unsigned int i;

  cin >> userState;

  foundState = false;for (i = 0; XXX; ++i) {if (stateNames.at(i) == userState) {foundState = true;cout << userState << ", " << statePop.at(i) << endl;}}

  
  

  (i < NUM_STATES - 1) && (!foundState)

  (i < NUM_STATES - 1)

  (i < NUM_STATES)

  (i < NUM_STATES) && (!foundState)


  (i < NUM_STATES) && (!foundState)
• Which XXX and YYY will find the minimum value of all the elements in the array? Choices are in the form XXX / YYY.

  int userVals[NUM_ROWS][NUM_COLS];int minVal = userVals[0][0];for (i = 0; i < NUM_ROWS; ++i) {for (j = 0; j < NUM_COLS; ++j) {if (XXX) {YYY;}}}

  
  

  userVals[j] < minVal / minVal = userVals[j]

  userVals[i][j] < minVal / minVal = userVals[i][j]

  userVals[i] < minVal / minVal = userVals[i]

  userVals[i][j] > minVal / minVal = userVals[i][j]

  userVals[i][j] < minVal / minVal = userVals[i][j]
• What is the ending value of the element at index 0?

  int numbers[10];numbers[0] = 35;numbers[1] = 37;numbers[1] = numbers[0] + 4;

  
  

  37

  0

  35

  39

  35