Notes

<1>Which of these headers provides functionality for reading data from a file and for writing to a file.
<variant>fstream
<2>What type of variable is used in the code int a = 5;
<variant> Signed 32-bit integer
<3>What does the "%" operator do?
<variant>Returns the remainder of the division
<4 >What will the program do by executing the following code: Console.WriteLine(«Hello, World!»);
<variant>Will write on a new line Hello, World!
5>What will be equal to c if int a = 17; int b = 4; int c = a % b;
<variant>1
6>What will be equal to c if int a = 10; int b = 4; bool c = (a == 10 && b == 4);
<variant>True
7>What will be equal to c if int a = 12; int c = a-;
<variant>12
8>What will be equal to d if int a =10; int b = a++; int c = 0; int d = a + b + c + 3;
<variant>24
9>What will be the result of calculating the expression: int d=5; bool b = true, c; c = (!b||(d>3)):
<variant>true
<10>What are conditional operators for?
<variant>For branching the program
<11>What the Term function will return after executing. Code: int Termin() { int a = 5; int b = 3; if (a != 5) return a + b; else return 0;}
<variant>0
<12>Which of the components can be included in the integrated programming environment:
<variant>debugger
<13>Which of the components can be included in the integrated programming environment:
<variant>text editor
<14>Which of the components can be included in the integrated programming environment:
<variant>compiler
<15>If a subtraction operation is defined for two objects of class A, and the conversion operation to int is not defined, what will be called when:A a1,a2,a3=5;a3 = a1 – a2;
<variant>an error will occur
<16>What is the name of the operator "?:"
<variant>Ternary operator
17>What is an array
<variant>A set of the same type of data that are located in memory sequentially one after another
18>Types of arrays?
<variant>One- dimensional and multidimensional
<19>What is a cycle and what are they for
<variant>Loops are needed for multiple code execution.
<20>What are the cycles?
<variant>for, while, do-while, foreach
<21>The function calculates the product of two numbers. The initial data is entered from the keyboard. What checks are advisable to enter in the program:
<variant>checking that the source data are numbers
<22>What is a constant?
<variant>A variable whose value cannot be changed.
<23>What is the namespace operator for?:
<variant>to enclose in a group of declarations of classes, variables and functions in a separate context with its own name
<24>Which of the sets of enumerated values is written correctly:
<variant>enum;
<25>What is the difference in using the following expressions #include<...> and #include"..."
<variant>the difference lies in the method of searching for the included file by the preprocessor
<26>If integer and real operands are involved in an arithmetic expression, then:
<variant> the whole type is reduced to real
<27>If there is a semicolon after the expression, then:
<variant> is an expression operator whose action is to evaluate the expression
<28>Specify in which expression the loss of accuracy will occur:
<variant>int i; float x = 2.134, y = 3.14; i = x/y;
<29>What is dynamic memory allocation:
<variant>memory for an object (variable) may not be allocated immediately, but during the operation of the program, memory is released manually
<30>Mark the true statement:
<variant>variable is declared, then changed
<31>Which operations can be overloaded:
<variant>unary and binary
<32>A variable of the “signed char” type can take values:
<variant>from the first half of the code table
<33>What is the numeric value of the expression e/2*a-abs(e)*1e0 by e = 4, a = 2:
<variant>0
<34>Choose the correct statement:
<variant>an integer variable can be assigned a real constant
<35>Choose the correct statement:
<variant>an integer variable can be assigned an integer constant
<36>Which expression does not contain syntax errors:
<variant>((cos(3*a+1.*abs(x))))
<37>Which expression does not contain syntax errors:
<variant>0XCC00*.34E-4/_do/k-2
<38>What is the numeric value of the expression sqrt(4)+142/20*2:
<variant>16
<39>What will be displayed as a result of executing a program fragment a=5; b=3; cout << a << "=Z(" << b << ")"; Here a and b are integer variables.
<variant>5=Z(3)
<40>What will the variable "c" be equal to after executing this program: a = 26; b = 6; c = a % b + b;
<variant>8
<41>What will the variable "c" be equal to after executing this program: a = 24; b = 5; b = a / b; c = a % (b + 1);
<variant>4
<42>Determine the value of the variable "a" after executing the program fragment: a = 10; if ( a < 5 ) a = a + 12; else a = a - 7;
<variant>3
<43>Determine the value of the variable "a" after executing the program fragment: a = 10; if ( a > 5 ) a = a + 12; else a = a - 7;
<variant>22
<44>Determine the value of the variable "a" after executing the program fragment: a = 10; b = 7; if ( a > 5 && a < b ) a = a - 5;
<variant>10
<45>What logical operation should be added to the program instead of an ellipsis so that the value of the variable "a" after executing the program fragment becomes equal to 15? a = 10; b = 5; if ( a < 1 ... a > b ) a = a - 5; else a = a + 5;
<variant>and
<46>What number will be displayed on the screen as a result of executing the program snippet? i = 6; cout << "9"; while ( i < 5 ) { cout << i; i++; }
<variant>9
<47>What number should be written instead of an ellipsis so that the cycle runs exactly 2 times? i = 4; while ( i >= ... ) { cout << "Привет!n"; i--; }
<variant>2
<48>What will be the value of the integer variable "a" after executing this fragment of the program? a = 2; for ( i=0; i<=4; i++ ) a += i;
<variant>12
<49>What number will be displayed on the screen after executing this fragment of the program? for ( i=2; i>=1; i-- ) cout << i;
<variant>21
<50>Check all the correct statements about arrays in C++
<variant> all array elements must be of the same type
<51>What index does the last element of array “A” have? int A[6];
<variant>5
<52>It is required to fill the array exactly like this: X = [1 3 5 7 9 11] Which operator should be placed in the body of the loop instead of an ellipsis? for ( k=0; k<6; k++ ) { ... }
<variant>X[k] = 2*k + 1
<53> Why use functions?
<variant>All answers are correct
<54> This class represents an output stream. It’s used for creating files and writing information to files.
<variant> ofstream
<55> This class represents an input stream. It’s used for reading information from data files.
<variant> ifstream
<56> Position functions..
<variant> All the answers are correct
<57> The ability to handle exceptions in C++ throw keywords
<variant> when a program encounters a problem, it throws an exception. The throw keyword helps the program perform the throw.
<58> The ability to handle exceptions in C++ catch keywords
<variant> a program uses an exception handler to catch an exception.
<59> The ability to handle exceptions in C++ try keywords
<variant> the try block identifies the code block for which certain exceptions will be activated.
<60> What is Char?
<variant> Char is a C++ data type designed for the storage of letters.
<61> What is String?
<variant> A string is a sequence of characters..
<62> Here is example using the C++ standard….:
#include <iostream>
#include <string>
using namespace std;
int main() {

string name = "Guru99";

cout << "The name is : " << name << endl;

return 0;
}
<variant> string class
<63> #include <iostream>
using namespace std;
int main() {
char grade = 'B';
cout<< "I scored a: "<<grade;
return 0;
}
Output is?
<variant> I scored a:B
<64> strcat() strings fanctions syntax is?
<variant> strcat(string1, string2);
<65> strcpy() string fanctions means:
<variant> This is the string copy function. It copies one string into another string.