CMPE110, Sample questions

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1 CMPE110, Sample questions Number : Name :... Q1)Give the correct answer for following: 1. What is the value of x after the following statement? double x; x = 3.0 / / 4 a b c d ANSWER: 2. What is the correct way to write the condition y < x < z in C++ form? a. (y < x < z) b. ( (y < x) && z) c. ((y > x) (y < z)) d. ((y < x) && (x < z)) ANSWER: 3. What is the output of the following code fragment? int x=0; while( x < 5) cout << x << endl; x ++; cout << x << endl; a. 0 b. 5 c. 4 d. unable to determine ANSWER: 4. Given the following code fragment, which of the following expressions is always true? int x; cin >> x; a. if( x < 3) b. if( x==1) c. if( (x / 3) >1 ) d. if( x = 1) ANSWER:. 5. Which of the following will correctly assign all the values in one array to the other array? (Assume both arrays are of the same type and have SIZE elements) a. array1=array2; b. array1[]=array2; c. for(i=0;i<size;i++) array1[i]=array2[i]; d. for(i=0;i<size;i++) array1[]=array2[]; ANSWER:

2 6. What is wrong with the following switch statement? int ans; cout <<"Type y for yes on n for no\n"; cin >> ans; switch (ans) { case 'y': case 'Y': cout << "You said yes\n"; break; case 'n': case 'N': cout << "You said no\n"; break; default: cout <<"invalid answer\n"; a. ans is an int b. break; is illegal syntax c. nothing d. there are no break statements on 2 cases. ANSWER: 7. What is the value returned by the following function? int function() { int value = 35; return value + 5; value += 10; a. 35 b. 40 c. 50 d. 10 ANSWER: 8. What is the output of the following function call? //function body int f1(int n) { int p=1; while(n > 0) { P* = n; n--; return product; //function call cout << f1(4); a. 4 b. 0 c. 24 d. 48 ANSWER:

3 Q2) It is required to write a C++ code to multiply two complex numbers. Complete the following code to perform the specified tasks. Note that two complex numbers can be multiplied as (a+i b)x(c+i d)=(ac-bd)+i(ad+bc) A sample run of the code can be Enter the real and the imaginary parts of Object N1: 2 3 Enter the real and the imaginary parts of Object N2: 4 6 The value of the N3 object is i class Complex{public:double RePart, ImPart;; int main() {//Declare complex objects N1, N2, N3 of type Complex // Read the real and imaginary part members of N1 and N2 objects // Compute the real part member of object N3 // Compute the imaginary part member object N3 // Print the result of the multiplication as requested return 0;

4 Q3) Complete the following code to that will compute the volume and the surface area of a cylinder. The volume and the surface area are computed, respectively, as 2 volume r h and surface area 2 r h 2 r The function DisplayMessage should display the following messages: Enter 1 to compute the volume. Enter 2 to compute the surface area. void DisplayMessage(void); double Compute_Volume(double); double Compute_Surface_Area(double); int main() {int Choice; double Radius, Height, Volume, SurfaceArea; cout< Enter the radius and the height of the cylinder: ; cin>>radius>>height; //activate the function Display message cin>>choice; if (choice = = 1) {//activate Compute_Volume function to compute the volume cout< The volume = << Volume; else if (choice = = 2) {//activate Compute_Surface_Area function to compute the surface area cout< The surface area = << SurfaceArea; else cout<< Wrong Choice is entered. ; return 0; //DisplayMessage Function definition // Convert_Volume Function definition // Convert_Surface_Area Function definition 2

5 Q4)Circle the correct answer for the following: 1. Which of the following statements is NOT legal? a. char ch='b'; b. char ch='0'; c. char ch='$'; d. char ch="cc"; 2. What is the correct way to write the condition y < x < z? a. (y < x < z) b. ( (y < x) && z) c. ((y > x) (y < z)) d. ((y < x) && (x < z)) 3. Given the following code fragment, what is the output? int x=5; if( x > 5) cout << "x is bigger than 5. "; cout <<"That is all. "; cout << "Goodbye\n"; a. x is bigger than 5. That is all b. x is bigger than 5 c. That is all. Goodbye d. Goodbye 4. Given the following code fragment, which of the following expressions is always true (no matter the value of x is)? int x; cin >> x; a. if( x < 3) b. if( x==1) c. if( (x / 3) >1 ) d. if( x = 1)

6 Q5)Write a C++ code to implement the following flowchart. Use switch statement to implement the selective structure. Do not use if-thenelse structure. Let the variables N1, N2 be of type integer and Op variable be of type character. Begin Read Op, N1, N2 F? Op = + T F? Op= - T R=N1-N2 R=N1+N2 Print Wrong Operator Print R Print R using namesapce std; int main(){// declaration.. //read the inputs from the Keyboard. //perform the required calculations using switch statement //and print the result on the monitor return 0;.... End

7 Q6) Complete the following C++ code that should compute the number of times that the global minimum appears in an integer array named List that contains 10 elements, i.e., List[10]. A sample run can be Enter the array elements: Global minimum is 2 Global minimum appears 4 times. #include <iostream> #define SIZE 10 int main(){int List[SIZE], Minimum, MinCount, i; cout<< Enter the array elemnets: ; for(i=0;i<size;i++) cin>>list[i]; // Find the Minimum // Find the global Minimum Count (MinCount) // Print the Minimum // Print the MinCount return 0;

8 Q7) It is required to write a C++ code to add two complex numbers. Complete the following code to perform the specified tasks. A sample run of the code can be Enter the real and the imaginary parts of Object A: 2 3 Enter the real and the imaginary parts of Object B: 4 6 The value of the C object is 6+9i class Complex{public: double RePart, ImPart;; int main() {// Declare complex objects A, B, C of type Complex // Read the real and imaginary part members of A and B objects // Compute the real part member of object C // Compute the imaginary part member object C // Print the result of the addition as requested return 0; Q8) Trace and show the output of the following code: Trace section int main(){ int M1[3][3]={1,5,3,2,6,4,1,0,-7; int i, j,s=0; for (i=0; i<3; i++) { for (j=0; j<3; j++) { if(i>=j) S+=M1[i][j]; cout<< The sum is <<S<<endl; return 0; Output section

9 Q9)Conisder the following code which reads from the keyboard the value of an integer variable n and the value of a double variable x and then computes the result of the following formula: 2 n f 1 x x x int main() { int n,i; double x,f=1.0,t=1.0; cin >> n >> x ; for (i = 1; i <= n; i++) { t*=x; f+=t; cout << "f=" << f << endl; return 0; // function definition // main function int main(){int n,m; double x,y;... // Activate FindSum to print z cout << "z=" <<... ; return 0; It is required to write a code to compute 2 n 1 x x x z 1 2 m y y y Where m in integer and y is double variables. Complete the given C++ code to do this task. Note: To compute the series, it is required to use a function with the following prototype: double FindSum(double, int);

10 Q10)Complete the following code to perform the specified tasks. using namespace std; class Student {public: double Grade1, Grade2; double Average; ; int main() {// Declare student object Student1 of type Student Student Student1; // Read the values of grade1 and grade2 members of Student1 object cin>>student1.grade1>>student1.grade2; // Compute the average grade of Student1 object as // Average = grade1+grade2 2 Student1.Average=(Student1.grade1+Stduent1.grade2)/2; // Print the average grade of Student1 object cout<<stduent1.average; return 0; Q11) What is the output of the following code: int main(){ int M1[3][3]={{1,5,3,{2,6,4,{1,0,-7; int i, j,s=0; for (i=0; i<3; i++) { for (j=0; j<3; j++) { if(i<=j)s+=m1[i][j]; cout<< The sum is <<S<<endl; return 0; The sum is 12

11 Q12)Complete the following code that will print all odd integers between two numbers N1 and N2. Note: Firstly, you must find the the minimum and the maximum of N1 and N2. For example, if N1=13 and N2=4, then the program should find Min=4, Max=13 and then prints on the monitor the following odd integers: #include <iostream> int main() {int N1, N2, Min, Max,i; cin>>n1>>n2; // Find the minimum (Min) and the maximum (Max) of N1 and N2 if(n1<n2){min=n1;max=n2;. else {Min=N2;Max=N1;.... // Print all odd integer numbers between Min and Max for(i=min;i<=max;i++. if(i%2==1)cout<<i<<endl;.. return 0;

12 Q13)Complete the following C++ code which will find the global minimum and then computes the number of times that the global minimum appears in an integer array named List that contains 100 elements, i.e., List[100]. For example, in the list 3, 2, 7, 5, 2, 8, 2, 4, 2, the global minimum is 2 and it appears 4 times. #include <iostream> #define SIZE 100 int main() {int List[SIZE], Minimum, MinCount, i; // Read elements of the array list for(i=0;i<size;i++) cin>>list[i]; // Find the global minimum (Minimum) Minimum=List[0]; for(i=0;i<size;i++) if(list[i]<minimum) Minimum=List[i]; // Print the global minimum cout<<minimum; // Find the number of times that global minimum appears in the // List (MinCount) MinCount=0; for(i=0;i<size;i++) if(list[i]==minimum)mincount++; // Print the MinCount cout<<mincount; return 0;

13 Q14)What is the output of the following C++ code segments: a) int a = 5, b = 8; temp = a; a = b; b = a; cout << a<< ", " << b; b) int Num1=10, Num2=15; M=Num1 > Num2?Num1:Num2; cout<< M; c) for(sum=0,int i=1; i<5; i++) {if (i==4) break; Sum+=i; cout << Sum; d) for(sum=0,int i=1; i<10; i++) {if (i%2==1) continue; Sum+=i; cout << Sum; 8, e) int a = 5, b = 8, temp; temp = a; a = b; b = temp; cout << a<< ", " << b; 8,5

14 Q15)Write down the correct answer for the following: 1. An algorithm is a. The inputs and outputs of a program b. The part of the computer that does the processing c. A finite set of steps to solve a problem d. A complete computer program ANSWER: c 2. Which of the following statements is NOT legal? a. char ch='b'; b. char ch='0'; c. char ch='$'; d. char ch="cc"; ANSWER: d 3. What is the correct way to write the condition y < x < z? a. (y < x < z) b. ( (y < x) && z) c. ((y > x) (y < z)) d. ((y < x) && (x < z)) ANSWER: d 4. Given the following code fragment, what is the output? int x=5; if( x > 5) cout << "x is bigger than 5. "; cout <<"That is all. "; cout << "Goodbye\n"; a. x is bigger than 5. That is all b. x is bigger than 5 c. That is all. Goodbye d. Goodbye ANSWER: c 5. Given the following code fragment, which of the following expressions is always true? int x; cin >> x; a. if( x < 3) b. if( x==1) c. if( (x / 3) >1 ) d. if( x = 1) ANSWER: d

15 Q16)Write a C++ code to implement the following flowchart. Use switch statement to implement the selective structure. Do not use if-then-else structure. Let the variables N1, N2 be of type integer and Op variable be of type character. Begin Read Op, N1, N2 F? Op = + T F? Op= - T R=N1-N2 R=N1+N2 Print Wrong Operator Print R Print R using namesapce std; int main(){// declaration int N1, N2, R;. char Op;. //read the inputs from the Keyboard cin>>n1>>n2>>op;. cin>>op;. //perform the required calculations using switch statement //and print the result on the monitor return 0; End switch(op). {case + : R=N1+N2;cout<<R;break;. case - : R=N1-N2;cout<<R;break;. default:cout<< Wrong Operator ;.

16 Q17) Complete the following code to perform the specified tasks. class Manager{public: int Category; float ExtHours, ExtPayment;; int main() {// Declare manager object Manager1 of type Manager Manager Manager1; // Read the value of the ExtHours and // Category members of Manager1 object from keyboard cin>>manager1.exthours>>manager1.category; // Compute ExtPayment for Manager1 object assuming that // ExtPayment = ExtHours X Category Manager1.ExtPayment = Manager1.ExtHours * Manager1.Category; // Print the ExtPayment of Manager1 object on the monitor cout<<manager1.extpayment; return 0; Q18) Consider the following program and write the outputs of this program for the various inputs given in the boxes below. Use the corresponding boxes for your answers. int main() { int score; cout<<"enter your score: "; cin>>score; Enter your score: 10 Enter your score: 55 if (score<20) cout<<"red"; else if (score<=45) cout<<"green"; if (score>45) cout<<"blue"; return 0; Enter your score: 40 Enter your score: 45

17 Q19) Answer the following questions. PART A) Write down the output of the following code fragment. int i; for (i=1; i<10; i++) { switch ( i / 3 ) { case 0: cout<< i; break; case 1: cout<< "1"; break; case 3: cout<< "3"; break; default: cout<< "E"; Q20) Let A be a 1-D integer array which contains 20 elements, fill in the following code to find the maximum element and its position (index value). int main(){//declarations int Max_Element, Max_Position,i; int A[20]; // get the array elements from the Keyboard for (i=0; i<20; i++) cin>>a[i]; // find the maximum element and its position (index value) Max_Element=A[0]; Max_Position=0; for (i=1; i<20; i++) {if(a[i]>max_element) {Max_Element=A[i]; Max_Position=i; // print the maximum element and its position (index value) cout<< Maximum element is <<Max_Element<<endl; cout<< Maximum element position is <<Max_Position<<endl; return 0;

18 Q21) Trace the following code and show its output: int main(){ int M1[3][3]={{1,5,3,{2,1,3,{1,0,2; int i, j,s=0; for (i=0; i<2; i++) { for (j=i+1; j<3; j++) { s+=m1[i][j]; cout<< S= <<s<<endl return 0; Trace section i i<2 j j<3 s 0 0 T 1 T 0+5=5 2 T 5+3=8 3 F 1 T 2 T 8+3=11 3 F 2 F Output section S=11 Q22) A/ Re-write the following if/else using switch statement: if(digit==0 Digit==1) cout<< Binary ; else cout Not Binary ; Switch(Digit){ case 0: case 1: printf( Binary );break; default: printf( Not Binary ); B/ Re-write the following code using for-loop: year=1900; sum=0; while(year<=4002) { sum+=year; cout<<"year="<<year; year+=sum; Sum=1900; for(year=1900; year<=4002;year+=sum) {sum+=year; cout<<"year="<<year; C/ What is the output of the following code segment: int j=2,i; for (i=3; i<=8; i+=2) {j+=i; if (j>6) break; cout<< j= <<j; Trace j i i<=8 j>6 2 3 T 5 F 5 T 10 T J=10

19 D/ What is the output of the following code segment: int i,sum=2; for (i=3; i<=10; i+=2) {if (i%3 == 0) continue; sum+=i; cout<<"sum= <<sum; Trace sum i i<=10 i%3==0 2 3 T T 5 T F 2+5=7 7 T F 7+7=14 9 T T 11 F Sum=14 Q23) Answer the following question. Complete the missing statements in the following program to compute R=n!-m!, where n! is the factorial of n computed as n!=1*2*3*..*n Note: the function Factorial (int a) computes the factorial of a, i.e., a!. int Factorial(int a) { int i, p=1; for (i=1, i<=a; i++) p=p*i; return p; int main( ) { int num1, num2, R; cout<< Enter an integer to calculate its factorial: ; cin>> num1>>num2; // Call the function to find num1!-num2! and assign the result to R variable R=Factorial(num1) Factorial(num2); cout<< Result = << R <<endl; return 0;

20 Q24) Complete the following C++ code to perform the specified tasks. class Student {public: int id_no; float grade1; float grade2; float avg_grade; ; int main() {; // Declare student object Student1 of type Student Student Student1; // Declare student object Student2 of type Student Student Student2; // Read from the keyboard the values of grade1 and grade2 members of // Student1 object cin>>student1.grade1>>student1.grade2; // Read from the keyboard the values of grade1 and grade2 members of // Student2 object cin>>student2.grade1>>student2.grade2; // Compute and print the average grade of Student1 object // Assume that avg_grade = (grade1+grade2)/2 Student1.avg_grade=(Student1.grade1 + Student1.grade2) /2; cout<<student1.avg_grade<<endl; // Compute and print the average grade of Student2 object // Assume that avg_grade = (grade1+grade2)/2 Student2.avg_grade=(Student2.grade1 + Student2.grade2) /2; cout<<student2.avg_grade<<endl; return 0;

Computer Engineering Department CMPE110 Midterm Sample Questions, 2017/ Fall

Computer Engineering Department CMPE110 Midterm Sample Questions, 2017/2018 - Fall Q1) Give the correct answer for following: 1. What is the value of x after the following statement? double x; x = 3.0