# COSC 1436 Practice

Total word count: 1754
Pages: 6

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 In a __ control structure, the computer executes particular statements depending on some condition(s). a. looping b. repetition c. selection d. sequence c. selection What does <= mean? a. less than b. greater than c. less than or equal to d. greater than or equal to c. less than or equal to Which of the following is a relational operator? a = b. == c. ! d. && b. == Which of the following is the "not equal to" relational operator? a. ! b. I c. != d. & c. != Suppose x is 5 and y is 7. Choose the value of the following expression: (x ! = 7) & & (x <= y) a. false b. true c. 0 d. null b. true Suppose that x is an int variable. Which of the following expressions always evaluates to true? a. (x > 0) I I (x <= 0) b. (x >= 0) I I (x == 0) c. (x > 0) && ( x <= 0) d. (x > 0) & & (x == 0) a. (x > 0) I I (x <= 0) Which of the following operators has the highest precedence? a. ! b. * c. % d. = a. ! Which of the following operators has the lowest precedence? a. ! b. II c. && d. = d. = Which of the following expressions correctly determines that x is greater than 10 and less than 20? a. 10 < x < 20 b. ( 1 0 < x < 20) c. 10 < x & & x < 20 d. 10 < x I I x < 20 c. 10 < x & & x < 20 The expression in an if statement is sometimes called a(n) __ . a. selection statement b. action statement c. decision maker d. action maker c. decision maker What is the output of the following C++ code? int x = 35; int y = 45; int z; if (x > y) z = x + y; else z = y – x; cout « x « " " « y « " " « z « endl; a. 35 45 80 b. 35 45 10 c. 35 45 -10 d. 35 45 0 b. 35 45 10 When one control statement is located within another, it is said to be __ . a. blocked b. compound c. nested d. closed c. nested What is the output of the following code? if (6 > 8) { cout « " ** " « endl ; cout « "****" « endl; } else if (9 == 4) cout « "***" « endl; else cout « "*" « endl; a. * b. ** c. *** d **** a. * To develop a program, you can use an informal mixture of C++ and ordinary language, called __ . a. assert code b. pseudocode c. cppcode d. source code b. pseudocode Which of the following will cause a logical error if you are trying to compare x to 5? a. if (x == 5) b. if (x = 5) c. if (x <= 5) d. if (x >= 5) b. if (x = 5) The appearance of = in place of == resembles a(n) __ . a. syntax error b. silent killer c. compilation error d. input failure b. silent killer The conditional operator ? : takes __ arguments. a. two b. three c. four d. five b. three What is the value of x after the following statements execute? int x; x = (5 <= 3 & & ‘A’ < ‘F’) ? 3 : 4 a. 2 b. 3 c. 4 d. 5 c. 4 Assume you have three int variables: x = 2, Y = 6 , and z. Choose the value of z in the following expression: z = ( y / x > 0) ? x : y; a. 2 b. 3 c. 4 d. 6 a. 2 What is the output of the following code? char lastlnitial = ‘S’; switch (lastlnitial) { case ‘A’: cout « "section 1" «endl; break; case ‘E’: cout « "section 2" «endl; break; case ‘C’: cout « "section 3" «endl; break; case ‘D’: cout « "section 4" «endl; break; default: cout « "section 5" «endl; } a. section 2 b. section 3 c. section 4 d. section 5 d. section 5 What is the output of the following code? char lastlnitial = ‘A’; switch (lastlnitial) { case ‘A’: cout « "section 1" «endl; break; case ‘E’: cout « "section 2" «endl; break; case ‘C’: cout « "section 3" «endl; break; case ‘D’: cout « "section 4" «endl; break; default: cout « "section 5" «endl; } a. section 1 b. section 2 c. section 3 d. section 5 a. section 1 What is the output of the following code fragment if the input value is 4? int num; int alpha = 10; cin » num; switch (num) { case 3: alpha++; break; case 4: case 6: alpha = alpha + 3;case 8: alpha = alpha + 4; break; default: alpha = alpha + 5; } cout « alpha « endl; a. 13 b. 14 c. 17 d. 22 a. 13 What is the output of the following C++ code? int x = 55; int y = 5; switch (x % 7) { case 0: case 1: y++; case 2: case 3: y = y + 2; case 4: break; case 5: case 6: y = y – 3; } cout « y « endl; a. 2 b. 5 c. 8 d. 10 a. 2 For a program to use the assert function, it must include which of the following? a. #include <assert> c. #include <assertc> b. #include <cassert> d. #include NDEBUG b. #include You can disable assert statements by using which of the following? a. #include b. #define c. #clear NDEBUG d. #define NDEBUG d. #define NDEBUG In __ structures, the computer repeats particular statements a certain number of times depending on some condition(s). a. looping b. branching c. selection d. sequence a. looping What is the output of the following C++ code? count = 1; num = 25; while (count < 25) { num = num – 1; count++; } cout « count « " " « num « endl; a. 24 0 b. 24 1 c. 25 0 d. 25 1 d. 25 1 What is the output of the following C++ code? num = 10; while (num > 10) num = num – 2; cout « num « endl; a. 0 b. 6 c. 8 d. 10 d. 10 A loop that continues to execute endlessly is called a(n) __ loop. a. end b. unlimited c. infinite d. definite c. infinite Assume all variables are properly declared. What is the output of the following C++ code? num = 100; while (num <= 150) num = num + 5; cout « num « endl; a. 150 b. 155 c. 160 d. 165 b. 155 Consider the following code. int limit; int counter = 0; cin » limit; while (counter < limit) { cin » entry; triple = entry * 3; cout « triple; counter++; } cout « endl; This code is an example of a(n) __ while loop. a. flag-controlled b. counter-controlled c. BOF-controlled ﻿ d. sentinel-controlled b. counter-controlled Suppose sum and num are int variables, and the input is 18 25 61 6 -1. What is the output of the following code? sum = 0; cin » num; while (num != -1) { sum = sum + num; cin » num; cout « sum « endl; a. 92 b. 109 c. 110 d 119 c. 110 A(n) __ -controlled while loop uses a bool variable to control the loop. a. counter b. sentinel c. flag d. BOF c. flag Consider the following code. (Assume that all variables are properly declared.) cin » ch; while (cin) { cout « ch; cin » ch; } This code is an example of a(n) __ loop. a. sentinel-controlled b. flag-controlled c.EOF-controlled d. counter-controlled c.EOF-controlled What is the next Fibonacci number in the following sequence? 1, 1,2,3,5,8, 13,21, … a. 34 b. 43 c. 56 d. 273 a. 34 Which of the following is the initial statement in the following for loop? (Assume that all variables are properly declared.) int i; for (i = 1; i < 20; i++) cout « "Hello World"; cout « "!" « endl; a. i = 1; b. i < 20; c. i ++ ; d cout « "Hello World"; a. i = 1; What is the output of the following C++ code? int j; for (j = 10; j <= 10; j++) cout « j « " "; cout « j « endl; a. 10 b. 10 10 c. 10 11 d. 11 11 c. 10 11 Suppose sum, num, and j are int variables, and the input is 4 7 12 9 -1. What is the output of the following code? cin » sum; cin » num; for (j = 1; j <= 3; j++) { cin » num; sum = sum + num; } cout « sum « endl; a. 24 b. 25 c. 41 d. 42 a. 24 Suppose j, sum, and num are int variables, and the input is 26 34 61 4 -1. What is the output of the code? sum = 0; cin » num; for (int j = 1; j <= 4; j++) { sum = sum + num; cin » num; } cout « sum « endl; a. 124 b. 125 c. 126 d 127 b. 125 Which executes first in a do … while loop? a. statement b. loop condition c. initial statement d. update statement a. statement What is the value of x after the following statements execute? int x = 5; int y = 30; do x = x * 2; while (x < y); a. 5 b. 10 c. 20 d. 40 d. 40 What is the output of the following loop? count = 5; cout « ‘St’; do { cout « ‘0’; count–; } while (count <= 5); a. St b. Sto c. Stop d. This is an infmite loop. d. This is an infmite loop. __ loops are called post-test loops. a. break b. for c. while d. do … while d. do … while Which of the following loops is guaranteed to execute at least once? a. counter-controlled while loop b. for loop c. do … while loop d. sentinel-controlled while loop c. do … while loop Which of the following loops does not have an entry condition? a. BOF-controlled while loop b. sentinel-controlled while loop c. do … while loop d. for loop c. do … while loop Which of the following is a repetition structure in C++? a. if b. switch c. while … do d. do … while d. do … while Which of the following is true about a do … while loop? a. The body of the loop is executed at least once. b. The logical expression controlling the loop is evaluated before the loop is entered. c. The body of the loop may not execute at all. d. It cannot contain a break statement. a. The body of the loop is executed at least once. Which of the following is not a function of the break statement? a. To exit early from a loop b. To skip the remainder of a switch structure c. To eliminate the use of certain bool variables in a loop d. To ignore certain values for variables and continue with the next iteration of a loop d. To ignore certain values for variables and continue with the next iteration of a loop Which executes immediately after a continue statement in a while and do-while loop? a. loop-continue test b. update statement c. loop condition d. the body of the loop a. loop-continue test When a continue statement is executed in a __ ‘ the update statement always executes. a. while loop b. for loop c. switch structure d. do … while loop b. for loop

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