Reference no: EM132218379
1) What is Math.ceil(3.6)?
3.0
3
4.0
5.0
2) What is Math.floor(3.6)?
3.0
3
4
5.0
3) Math.pow(3, 3) returns _______.
27
9
27.0
9.0
4) Math.sqrt(4) returns _______.
2
2.0
1
1.0
5) To obtain the sine of 35 degrees, use _______.
Math.sin(35)
Math.sin(Math.toRadians(35.0))
Math.sin(Math.toDegrees(35.0))
Math.sin(Math.toRadian(35))
Math.sin(Math.toDegree(35))
6) Which of the following is the correct expression of character 4?
4
"4"
'\0004'
'4'
7) A Java Unicode character is stored in __________.
one byte
two bytes
three bytes
four bytes
8) Suppose x is a char variable with a value 'b'. What is the printout of the statement System.out.println(++x)?
a
b
c
d
9) Which statement prints smith\exam1\test.txt?
System.out.println("smith\exam1\test.txt");
System.out.println("smith\\exam1\\test.txt");
System.out.println("smith\"exam1\"test.txt");
System.out.println("smith"\exam1"\test.txt");
10) Suppose i is an int type variable. Which of the following statements display the character whose Unicode is stored in variable i?
System.out.println(i);
System.out.println((char)i);
System.out.println((int)i);
System.out.println(i + " ");
11) The Unicode of 'a' is 97. What is the Unicode for 'c'?
96
97
98
99
12) Will System.out.println((char)4) display 4?
Yes
No
13) To check whether a char variable ch is an uppercase letter, you write ___________.
(ch >= 'A' && ch >= 'Z')
(ch >= 'A' && ch <= 'Z')
(ch >= 'A' || ch <= 'Z')
('A' <= ch <= 'Z')
14) What is the return value of "SELECT".substring(0, 5)?
"SELECT"
"SELEC"
"SELE"
"ELECT"
15) Which of the following is the correct statement to return JAVA?
toUpperCase("Java")
"Java".toUpperCase("Java")
"Java".toUpperCase()
String.toUpperCase("Java")
16) The expression "Java " + 1 + 2 + 3 evaluates to ________.
Java6
Java 123
java 123
Illegal expression
17) Note that the Unicode for character A is 65. The expression "A" + 1 evaluates to ________.
66
B
A1
Illegal expression
18) Note that the Unicode for character A is 65. The expression 'A' + 1 evaluates to ________.
66
B
A1
Illegal expression
19) The __________ method parses a string s to an int value.
integer.parseInt(s);
Integer.parseInt(s);
integer.parseInteger(s);
Integer.parseInteger(s);
20) The __________ method converts a string s to a double value.
double.parseDouble(s);
Double.parsedouble(s);
double.parse(s);
Double.parseDouble(s);
21) The statement System.out.printf("%3.1f", 1234.56) outputs ___________.
123.4
123.5
1234.5
1234.56
1234.6
22) The statement System.out.printf("%3.1e", 1234.56) outputs ___________.
0.1e+04
0.123456e+04
0.123e+04
1.2e+03
1.23+03
23) The statement System.out.printf("%5d", 123456) outputs ___________.
12345
23456
123456
12345.6
24) The statement System.out.printf("%10s", 123456) outputs ___________. (Note: * represents a space)
123456****
23456*****
12345*****
****123456
25) You can cast a character value to an int, or an int to char.
true
false
26) Which of the following is the correct expression of character a?
'a'
"a"
'\000a'
'\a'
27) Which of the following assignment statements is correct to assign character 5 to c?
char c = '5';
char c = 5;
char c = "5";
char c = "344";
28) The expression 'e' - 'c' is ________________.
2
-2
a random number
invalid
29) parseInt is a method in the _______ class.
Integer
Double
Math
System
30) parseDouble is a method in the _______ class.
Integer
Double
Math
System
31) "unhappy".substring(2) returns "happy".
true
false
32) "smiles".substring(1, 5) returns "mile".
true
false
33) You compare two strings s1 and s2 using ________.
(s1==s2)
s1.compare(s2)
compareTo(s1, s2)
s1.compareTo(s2)
34) "ab".compareTo("aa") is _________.
greater than 0
less than 0
equal to 0
less than or equal to 0
35) "abcdefgh".subString(1, 3) returns ________.
abc
bcd
bc
cde
36) Given two Strings s1 = "Welcome to Java" and s2 = "Programming is fun", which of the following is true?
s1.equals(s2)
s2.equals(s1)
s1.contains(s2)
s2.contains(s1)
!s1.contains(s2)