C++ Test

Which of the following represent valid variable definitions? int n = -100; unsigned int i = -100; signed int = 2.9; long m = 2, p = 4; int 2k; double x = 2 * m; float y = y * 2; unsigned double z = 0.0; double d = 0.67F; float f = 0.52L; signed char = -1786; char c = '$' + 2; sign char h = '\111'; char *name = "Peter Pan"; unsigned char *num = "276811";

Which of the following represent valid identifiers? identifier seven_11 _unique_ gross-income gross$income 2by2 default average_weight_of_a_large_pizza variable object.oriented

Which of the following are invalid variable names and why? BASICSALARY _basic #MEAN group. population in 2006 overtime FLOAT hELLO team’svictory Plot # 3

basic-hra 422 mindovermatter queue. 2015_DDay

int a, b ; a = -3 - - 3 ; b = -3 - - ( - 3 ) ; cout<< a<< b ; Ans a=0 and b= -6 A character variable can at a time store (1) 1 character

(2) 8 characters (3) 254 characters (4) None of the above A C++ variable cannot start with (1) An alphabet (2) A number (3) A special symbol other than underscore (4) Both (2) & (3) above (q) (1) (2) (3) (4)

The expression, a = 30 * 1000 + 2768 ; evaluates to 32768 -32768 113040 0

What is the final value of x when the code int x; for(x=0; x<10; x++) {} is run? A. 10 B. 9 C. 0 D. 1 4. How many times is a do while loop guaranteed to loop? A. 0 B. Infinitely C. 1 D. Variable void main() { int i; for(i=1;i<4,i++) switch(i) case 1: printf("%d",i);break; { case 2:printf("%d",i);break; case 3:printf("%d",i);break; } switch(i) case 4:printf("%d",i); } Ans: 1,2,3,4 Single line comments explaining code would be preceded like in the following example

/**

//

*//

/*

What punctuation must each command line have at the end of the line?

: , ! ; The C++ language is case-sensitive. Not case-sensitive. It depends None of these Select the correct definition for a string variable . string mystr; string mystr[20]; string[20] mystr; char mystr[20]; Cout can print multiple values or variables in a single command using the following syntax: cout << "Hi" + bob + "\n"; cout << "Hi" << bob << "\n"; cout << "Hi", bob, "\n"; cout << ("Hi" & bob & "\n"); Write a for loop that counts from 0 to 5 for (c = 0; c <= 5; c++) for (int c = 0; c <= 6; c++) for (c = 0; c < 5; c++) for (c = 0; c < 5; c++); Indicate which data type is not part of standard C++. bool int real double What is the output of the following code? for (int i=0; i<10; i++); { cout << i%2 << " "; } 0123456789 0 2 4 6 8 10 12 14 16 18 1010101010 0 What is the output of the following code? for (int i=0; i<10; i++); { cout << i%2 << " "; }

0123456789 0 2 4 6 8 10 12 14 16 18 1010101010 0101010101 Which of the following is the boolean operator for logical-and? A. & B. && C. || D. |&s . Evaluate !(1 && !(0 || 1)). A. True B. False C. Unevaluatable 4. What is the result of the following code? x=0; switch(x) { case 1: printf( "One" ); case 0: printf( "Zero" ); case 2: printf( "Hello World" ); }

A. One B. Zero C. Hello World D. ZeroHello World