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Question Hot Seat public MyConstructor (int a, int b) { index = a+b; } A.Parameters B.Class Name C.Body D.Modifier Please put match these choices to these boxes from left to right DBAC
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Ask Audience 50-50 Call a friend Which of the following is invalid identifier? a. GoodVarb. $Good123Var c. Good_123Vard. %Good$Var 100 200 300 500 1000
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Ask Audience 50-50 Call a friend How would you define a Java array? a. GoodVarb. $Good123Var a. Good_123Vara. %Good$Var 100 200 300 500 1000
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Ask Audience 50-50 Call a friend How would you define a Java array ? a. a collection of data values of different types b. a collection of data values of the same type c. a collection of characters that incidentally form a string 100 200 300 500 1000 d. a collection of primitive data types
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Ask Audience 50-50 Call a friend How would you define a Java array? a. a collection of data values of different types b. a collection of data values of the same type c. a collection of characters that incidentally form a string 100 200 300 500 1000 d. a collection of primitive data types
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Ask Audience 50-50 Call a friend What are the two ways that a Java array can be declared? a. [ ] ; ; b. [ ]; ;[ ] c. [ ] ; [ ] ; 100 200 300 500 1000 d. [ ] ; [ ];
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Ask Audience 50-50 Call a friend What are the two ways that a Java array can be declared? a. [ ] ; ; b. [ ]; ;[ ] c. [ ] ; [ ] ; 100 200 300 500 1000 d. [ ] ; [ ];
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Ask Audience 50-50 Call a friend Which of the following declares an array of integers of size 20? a. int[ ] a = int[20]; b. int[ ] a = new int[20]; c. int a = new int[19]; 100 200 300 500 1000 d. int a[ ] = new int[19];
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Ask Audience 50-50 Call a friend Which of the following declares an array of integers of size 20? a. int[ ] a = int[20]; b. int[ ] a = new int[20]; c. int a = new int[19]; 100 200 300 500 1000 d. int a[ ] = new int[19];
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Ask Audience 50-50 Call a friend How would we access the 12th element of the array, x? a. x(12); b. x(11); c. x[12]; 100 200 300 500 1000 d. x[11];
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Ask Audience 50-50 Call a friend How would we access the 12th element of the array, x? a. x(12); b. x(11); c. x[12]; 100 200 300 500 1000 d. x[11];
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Ask Audience 50-50 Call a friend Why are loops particularly useful for array operations? a. Because loops easily traverse through the indexes of the array. b. Because loops solve problems that otherwise would not be solvable without them. c. Because loops take less time to run than conventional coding without loops. 2000 4000 8000 16000 32000 d. Loops do not aid in the processing of arrays.
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Ask Audience 50-50 Call a friend Why are loops particularly useful for array operations? a. Because loops easily traverse through the indexes of the array. b. Because loops solve problems that otherwise would not be solvable without them. c. Because loops take less time to run than conventional coding without loops. 2000 4000 8000 16000 32000 d. Loops do not aid in the processing of arrays.
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Ask Audience 50-50 Call a friend What does the following program do? double x = 0, unknown; for (int j = 0; j < someArray.length; j++){ x+=someArray[j]; } unknown = x /someArray.length; a. Computes the sum of the doubles in the array, someArray. b. Deletes all the doubles in the array, someArray. c. Computes the average of all the doubles in the array, someArray 2000 4000 8000 16000 32000 d. Computes the dot product of all the doubles in the array, someArray.
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Ask Audience 50-50 Call a friend What does the following program do? double x = 0, unknown; for (int j = 0; j < someArray.length; j++){ x+=someArray[j]; } unknown = x /someArray.length; a. Computes the sum of the doubles in the array, someArray. b. Deletes all the doubles in the array, someArray. c. Computes the average of all the doubles in the array, someArray 2000 4000 8000 16000 32000 d. Computes the dot product of all the doubles in the array, someArray.
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Ask Audience 50-50 Call a friend Given a value X, return the index of X in the array, if such X exists. Otherwise, return NOT_FOUND. We assume there are no duplicate entries in the array. What are the two possible outcomes in this problem? a. linear search and binary search b. -1 and X c. an index and a value 2000 4000 8000 16000 32000 d. successful and unsuccessful
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Ask Audience 50-50 Call a friend Given a value X, return the index of X in the array, if such X exists. Otherwise, return NOT_FOUND. We assume there are no duplicate entries in the array. What are the two possible outcomes in this problem? a. linear search and binary search b. -1 and X c. an index and a value 2000 4000 8000 16000 32000 d. successful and unsuccessful
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Ask Audience 50-50 Call a friend When would a programmer be forced to pick a linear search over a binary search? a. When the items in the array are in ascending order b. When the items in the array are in descending order c. When the items in the array are unsorted 2000 4000 8000 16000 32000 d. Linear search is never a better choice than binary search.
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Ask Audience 50-50 Call a friend When would a programmer be forced to pick a linear search over a binary search? a. When the items in the array are in ascending order b. When the items in the array are in descending order c. When the items in the array are unsorted 2000 4000 8000 16000 32000 d. Linear search is never a better choice than binary search.
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Ask Audience 50-50 Call a friend Which of the following best describes the protocol for a selection sort? a.Identify the largest element. Place the element at the beginning of a target list Repeat b. Identify the median of the list Split the list into two halves, those smaller and those larger than the median Perform the same sort on each of the smaller halves c. Identify the smallest element of the list Place the element in the beginning of the target list Repeat 2000 4000 8000 16000 32000 d. Identify the median element of the list Place the element in the beginning of a target list Repeat
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Ask Audience 50-50 Call a friend Which of the following best describes the protocol for a selection sort? a.Identify the largest element. Place the element at the beginning of a target list Repeat b. Identify the median of the list Split the list into two halves, those smaller and those larger than the median Perform the same sort on each of the smaller halves c. Identify the smallest element of the list Place the element in the beginning of the target list Repeat 2000 4000 8000 16000 32000 d. Identify the median element of the list Place the element in the beginning of a target list Repeat
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Ask Audience 50-50 Call a friend What is the biggest number of computations made for a binary search on a sorted array of size 64? a)3b)5 c)6 2000 4000 8000 16000 32000 d)8
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Ask Audience 50-50 Call a friend What is the biggest number of computations made for a binary search on a sorted array of size 64? a)3b)5 c)6 2000 4000 8000 16000 32000 d)8
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Ask Audience 50-50 Call a friend What is wrong with the following code? int product = 0, count=0; while (product < 2500){ product *= 5; count++; } a. the syntax of the while statement is invalid b. the operator, *=, does not exist. c. it has an infinite loop 64000 125000 250000 500000 1000000 d. the count variable is initialized incorrectly.
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Ask Audience 50-50 Call a friend What is wrong with the following code? int product = 0, count=0; while (product < 2500){ product *= 5; count++; } a. the syntax of the while statement is invalid b. the operator, *=, does not exist. c. it has an infinite loop 64000 125000 250000 500000 1000000 d. the count variable is initialized incorrectly.
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Ask Audience 50-50 Call a friend Assume you had a class BankInfo that contained three data members: accountNumber, pinNumber, and name. The data member name must be searchable by other classes. What access modifiers would you apply to these members? a. make accountNumber private, pinNumber private, and name public b. make accountNumber public, pinNumber private, and name public c. make them all private 64000 125000 250000 500000 1000000 d. make them all public
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Ask Audience 50-50 Call a friend Assume you had a class BankInfo that contained three data members: accountNumber, pinNumber, and name. The data member name must be searchable by other classes. What access modifiers would you apply to these members? a. make accountNumber private, pinNumber private, and name public b. make accountNumber public, pinNumber private, and name public c. make them all private 64000 125000 250000 500000 1000000 d. make them all public
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Ask Audience 50-50 Call a friend What is the difference in path name specification between the UNIX and Windows operating systems? a. There are no.exe files in UNIX but there are.exe files in Windows b. UNIX allows for spaces in file and directory names while Windows does not. c. UNIX separates directories from subdirectories with forward slashes while Windows separates directories with backslashes. 64000 125000 250000 500000 1000000 d. There is no difference
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Ask Audience 50-50 Call a friend What is the difference in path name specification between the UNIX and Windows operating systems? a. There are no.exe files in UNIX but there are.exe files in Windows b. UNIX allows for spaces in file and directory names while Windows does not. c. UNIX separates directories from subdirectories with forward slashes while Windows separates directories with backslashes. 64000 125000 250000 500000 1000000 d. There is no difference
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Ask Audience 50-50 Call a friend Assume you want to read the contents of a file and display to the monitor. Which file I/O classes can we use to accomplish this? a. FileInputStream or FileOutputStream b. FileInputStream or DataInputStream c. FileOutputStream or DataOutputStream 64000 125000 250000 500000 1000000 d. DataInputStream or DataOutputStream
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Ask Audience 50-50 Call a friend Assume you want to read the contents of a file and display to the monitor. Which file I/O classes can we use to accomplish this? a. FileInputStream or FileOutputStream b. FileInputStream or DataInputStream c. FileOutputStream or DataOutputStream 64000 125000 250000 500000 1000000 d. DataInputStream or DataOutputStream
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Ask Audience 50-50 Call a friend 64000 125000 250000 500000 1000000
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Ask Audience 50-50 Call a friend 64000 125000 250000 500000 1000000
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