Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is a upper-case letter.
0%
(x>='0' && x<='7')
0%
(x>='0' && x<='9')
0%
(x>='A' && x<='Z')
0%
(x>='A' && x<='Z') || (x>='a' && x<='z')
Q.2.
Assume that c is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if c is what is called a whitespace character (that is a space or a tab or a newline-- none of which result in ink being printed on paper).
0%
((x>='A' && x<='Z') || (x>='a' && x<='z'))
0%
!(c == ' ' || c== '\n' || c == '\t')
0%
!(x >= 'A' && x <='Z')
0%
(c == ' ' || c== '\n' || c == '\t')
Q.3.
Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is a decimal digit (0-9).
0%
(x>='a' && x<='z')
0%
(x>='0' && x<='9')
0%
(x>='0' && x<='7')
0%
(x>='A' && x<='Z') || (x>='a' && x<='z')
Q.4.
What's the difference in ASCII value between '3' and '0'? (consult a table of ASCII values):
0%
3
0%
6
0%
4
0%
c == ' '
Q.5.
Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is a lower-case letter.
0%
(x>='A' && x<='Z') || (x>='a' && x<='z')
0%
(x>='a' && x<='z')
0%
(x>='0' && x<='7')
0%
(x>='0' && x<='9')
Q.6.
Assume that c is a char variable that has been declared and already given a value . Write an expression whose value is true if (c == '\n')and only if c is an newline character .
0%
!(x >= 'A' && x <='Z')
0%
c == ' '
0%
(c == '\n')
0%
(c=='\t')
Q.7.
Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is an octal (Base 8) digit (0-7).
0%
(x>='A' && x<='Z') || (x>='a' && x<='z')
0%
(x>='0' && x<='7')
0%
(x>='A' && x<='Z')
0%
(x>='0' && x<='9')
Q.8.
Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is an hexadecimal (Base 16) digit (0-9 plus A-F or a-f).
Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is NOT a letter.
Assume that c is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if c is a tab character .
0%
(c=='\t')
0%
(c == '\n')
0%
c == ' '
0%
(x>='A' && x<='Z')
Q.11.
Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is NOT a upper-case letter.
0%
(x>='0' && x<='9')
0%
!(x >= 'A' && x <='Z')
0%
(x>='a' && x<='z')
0%
!((x >= 'A' && x <='Z') || (x >= 'a' && x <='z'))
Q.12.
Assume that x is a char variable that has been declared and already given a value . Write an expression whose value is true if and only if x is alphanumeric , that is either a letter or a decimal digit.