Que- Which of these is an incorrect array declaration?
a.int arr[] = new int[5]
b. int [] arr = new int[5]
c. int arr[] = new int[5]
d.int arr[] = int [5] new
Answer-int arr[] = int [5] new
Que- What will be the output of the following Java code? int arr[] = new int [5]; System.out.print(arr);
a.0
b.value stored in arr[0]
c.0
d.Class name@ hashcode in hexadecimal form
Answer-Class name@ hashcode in hexadecimal form
Que- Which of these is an incorrect Statement?
a.It is necessary to use new operator to initialize an array
b.Array can be initialized using comma separated expressions surrounded by curly braces
c. Array can be initialized when they are declared
d. None of the mentioned
Answer-It is necessary to use new operator to initialize an array
Que- Which of these is necessary to specify at time of array initialization?
a. Row
b. Column
c. Both Row and Column
d. None of the mentioned
Answer- Row
Que- 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
Answer- UNICODE
Que- Any integer value
a.TRUE
b.FALSE
c.Nothing Can be Said
d.None of the mentioned
Answer-TRUE
Que- Where is an array stored in memory?
a. heap space
b. stack space
c. heap space and stack space
d. first generation memory
Answer- heap space
Que- An array elements are always stored in ________ memory locations.
a. Sequential
b. Random
c. Sequential and Random
d. Binary search
Answer- Sequential
Que- Which of the following can be operands of arithmetic operators?
a. Numeric
b. Boolean
c. Characters
d. Both Numeric & Characters
Answer- Both Numeric & Characters
Que- Modulus operator, %, can be applied to which of these?
a. Integers
b. Floating – point numbers
c. Both Integers and floating – point numbers
d. None of the mentioned
Answer- Both Integers and floating – point numbers
Que- With x = 0, which of the following are legal lines of Java code for changing the value of x to 1? 1. x++; 2. x = x + 1; 3. x += 1; 4. x =+ 1;
a. 1, 2 & 3
b. 1 & 4
c. 1, 2, 3 & 4
d. 3 & 2
Answer- 1, 2, 3 & 4
Que- Decrement operator, ??, decreases the value of variable by what number?
a.1
b.2
c.3
d.4
Answer-1
Que- Which of these statements are incorrect?
a. Assignment operators are more efficiently implemented by Java run-time system than their equivalent long forms
b. Assignment operators run faster than their equivalent long forms
c. Assignment operators can be used only with numeric and character data type
d. None of the mentioned
Answer- None of the mentioned
Que- Which operator is used to invert all the digits in a binary representation of a number?
a. ~
b. <<<
c. >>>
d. ^
Answer- ~
Que- On applying Left shift operator, <<, on integer bits are lost one they are shifted past which position bit?
a.1
b.32
c.33
d.31
Answer-31
Que- Which right shift operator preserves the sign of the value?
a. <<
b. >>
c. <<=
d. >>=
Answer- >>
Que- Which of these statements are incorrect?
a. The left shift operator, <<, shifts all of the bits in a value to the left specified number of times
b. The right shift operator, >>, shifts all of the bits in a value to the right specified number of times
c. The left shift operator can be used as an alternative to multiplying by 2
d. The right shift operator automatically fills the higher order bits with 0
Answer- The right shift operator automatically fills the higher order bits with 0
Que- What is the output of relational operators?
a. Integer
b. Boolean
c. Characters
d. Double
Answer- Boolean
Que- Which of these is returned by "greater than", "less than" and "equal to" operators?
a. Integers
b. Floating – point numbers
c. Boolean
d. None of the mentioned
Answer- Boolean