Java & Web Development Assessment Exam
.
- 1.What is the range of data type short in Java?
- A.
-128 to 127
- B.
-32768 to 32767
- C.
-2147483648 to 2147483647
- D.
None of the mentioned
- 2.What is the range of data type byte in Java?
- A.
-128 to 127
- B.
-32768 to 32767
- C.
-2147483648 to 2147483647
- D.
None of the mentioned
- 3.Which of the following are legal lines of Java code?
- int w = (int)888.8;
- byte x = (byte)100L;
- long y = (byte)100;
- byte z = (byte)100L;
- A.
1 and 2
- B.
2 and 3
- C.
3 and 4
- D.
All statements are correct.
- 4.An expression involving byte, int, and literal numbers is promoted to which of these?
- A.
Int
- B.
Long
- C.
Byte
- D.
Float
- 5.Which of these literals can be contained in a data type float variable?
- A.
1.7e-308
- B.
3.4e-038
- C.
1.7e+308
- D.
3.4e-050
- 6.Which data type value is returned by all transcendental math functions?
- A.
Int
- B.
Float
- C.
Double
- D.
Long
- 7.
![What is the output of this program? - ProProfs]( "What is the output of this program?")
What is the output of this program?- A.
16.34
- B.
16.566666644
- C.
16.46666666666667
- D.
16.46666666666666
- 8.
![What is the output of this program? - ProProfs]( "What is the output of this program?")
What is the output of this program?- A.
38 43
- B.
39 44
- C.
295 300
- D.
295.04 300
- 9.
![What is the output of this program? - ProProfs]( "What is the output of this program?")
What is the output of this program?- A.
25
- B.
24
- C.
32
- D.
33
- 10.
![What is the output of this program? - ProProfs]( "What is the output of this program?")
What is the output of this program?- A.
301.5656
- B.
301
- C.
301.56
- D.
301.56560000
- 11.What is the numerical range of a char in Java?
- A.
-128 to 127
- B.
0 to 256
- C.
0 to 32767
- D.
0 to 65535
- 12.Which of these coding types is used for data type characters in Java?
- A.
ASCII
- B.
ISO-LATIN-1
- C.
UNICODE
- D.
None of the mentioned
- 13.Which of these values can a boolean variable contain?
- A.
True & False
- B.
0 & 1
- C.
Any integer value
- D.
Both a & b
- 14.Which of these occupy first 0 to 127 in Unicode character set used for characters in Java?
- A.
ASCII
- B.
ISO-LATIN-1
- C.
None of the mentioned
- D.
Both a & b
- 15.Which one is a valid declaration of a boolean?
- A.
Boolean b1 = 1;
- B.
Boolean b2 = ‘false’;
- C.
Boolean b3 = false;
- D.
Boolean b4 = ‘true’
- 16.
![What is the output of this program? - ProProfs]( "What is the output of this program?")
What is the output of this program?- A.
I i i i i
- B.
0 1 2 3 4
- C.
I j k l m
- D.
None of the mentioned
- 17.
![What is the output of this program? - ProProfs]( "What is the output of this program?")
What is the output of this program?- A.
66
- B.
67
- C.
65
- D.
64
- 18.
![What is the output of this program? - ProProfs]( "What is the output of this program?")
What is the output of this program?- A.
0
- B.
1
- C.
True
- D.
False
- 19.
![What is the output of this program? - ProProfs]( "What is the output of this program?")
What is the output of this program?- A.
0
- B.
1
- C.
True
- D.
False
- 20.
![What is the output of this program? - ProProfs]( "What is the output of this program?")
What is the output of this program?- A.
162
- B.
65 97
- C.
67 95
- D.
66 98
- 21.What are generic methods?
- A.
Generic methods are the methods defined in a generic class.
- B.
Generic methods are the methods that extend generic class’s methods.
- C.
Generic methods are methods that introduce their own type parameters.
- D.
Generic methods are methods that take void parameters.
- 22.Which of these type parameters is used for a generic methods to return and accept any type of object?
- A.
K
- B.
N
- C.
T
- D.
V
- 23.Which of these type parameters is used for a generic methods to return and accept a number?
- A.
K
- B.
N
- C.
T
- D.
V
- 24.Which of these is an correct way of defining generic method?
- A.
Name(T1, T2, …, Tn) { /* … */ }
- B.
Public name { /* … */ }
- C.
Class name[T1, T2, ..., Tn] { /* … */ }
- D.
Name{T1, T2, …, Tn} { /* … */ }
- 25.Which of the following is incorrect statement regarding the use of generics and parameterized types in Java?
- A.
Generics provide type safety by shifting more type checking responsibilities to the compiler.
- B.
Generics and parameterized types eliminate the need for down casts when using Java Collections.
- C.
When designing your own collections class (say, a linked list), generics and parameterized types allow you to achieve type safety with just a single class definition as opposed to defining multiple classes
- D.
All of the mentioned
.JPG "What is the output of this program?")
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