JAVA interview question set 17

Which of the following can be operands of arithmetic operators? Which of the following can be operands of arithmetic operators?

1 Mark(s)

Numeric
Boolean
Characters
Both Numeric & Characters

What is the replacement of joda time library in java 8? What is the replacement of joda time library in java 8?

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java.time (JSR-310)
java.date (JSR-310)
java.joda
java.jodaTime

How to get UTC time? How to get UTC time?

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Time.getUTC()
Date.getUTC()
Instant.now()
TimeZone.getUTC()

Modulus operator, %, can be applied to which of these? Modulus operator, %, can be applied to which of these?

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Integers
Floating – point numbers
Both Integers and floating – point numbers
None of the mentioned

Where is an array stored in memory? Where is an array stored in memory?

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heap space
stack space
heap space and stack space
first generation memory

How to format date from one form to another? How to format date from one form to another?

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SimpleDateFormat
DateFormat
SimpleFormat
DateConverter

How to sort an array? How to sort an array?

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Array.sort()
Arrays.sort()
Collection.sort()
System.sort()

Literals in java must be appended by which of these? Literals in java must be appended by which of these?

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L
I
D
L and I

Which of these can be returned by the operator &? Which of these can be returned by the operator &?

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Integer
Boolean
Character
Integer or Boolean

How is Date stored in database? How is Date stored in database?

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java.sql.Date
java.util.Date
java.sql.DateTime
java.util.DateTime

What is the type of variable ‘b’ and ‘d’ in the following Java snippet?...int a[],b....int []c,d What is the type of variable ‘b’ and ‘d’ in the following Java snippet?...int a[],b....int []c,d

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b’ and ‘d’ are int
‘b’ and ‘d’ are arrays of type int
‘b’ is int variable; ‘d’ is int array
‘d’ is int variable; ‘b’ is int array

Which of these is an incorrect array declaration? Which of these is an incorrect array declaration?

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int arr[] = new int[5] ;
int [] arr = new int[5] ;
int arr[];...arr=new int[5];
int arr[] = int [5] new;

What is the prototype of the default constructor of this Java class?...public class prototype {} What is the prototype of the default constructor of this Java class?...public class prototype {}

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prototype( )
prototype(void)
public prototype(void)
public prototype( )

Which of these operators is used to allocate memory to array variable in Java? Which of these operators is used to allocate memory to array variable in Java?

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malloc
alloc
new
new malloc

How to sort an array? How to sort an array?

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Set
List
Tree
Array

Which of these can not be used for a variable name in Java? Which of these can not be used for a variable name in Java?

1 Mark(s)

identifier
keyword
identifier & keyword
none of the mentioned

Which of these is an incorrect array declaration? Which of these is an incorrect array declaration?

1 Mark(s)

int arr[] = new int[5]
int [] arr = new int[5]
int arr[] = new int[5]
int arr[] = int [5] new

Which of these is necessary condition for automatic type conversion in Java? Which of these is necessary condition for automatic type conversion in Java?

1 Mark(s)

The destination type is smaller than source type
The destination type is larger than source type
The destination type can be larger or smaller than source type
None of the mentioned

Generics does not work with? Generics does not work with?

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Set
List
Tree
Array

Is SimpleDateFormat thread safe? Is SimpleDateFormat thread safe?

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TRUE
false
TRUE
false

What is Truncation is Java? What is Truncation is Java?

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Floating-point value assigned to an integer type
Integer value assigned to floating type
Floating-point value assigned to an Floating type
Integer value assigned to floating type

An array elements are always stored in ________ memory locations. An array elements are always stored in ________ memory locations.

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Sequential
Random
Sequential and Random
Binary search

Which of these is an incorrect Statement? Which of these is an incorrect Statement?

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It is necessary to use new operator to initialize an array
Array can be initialized using comma separated expressions surrounded by curly braces
Array can be initialized when they are declared
None of the mentioned

Literal can be of which of these data types? Literal can be of which of these data types?

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integer
float
boolean
all of the mentioned

Which of these is long data type literal? Which of these is long data type literal?

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0x99fffL
ABCDEFG
0x99fffa
99671246

How to get difference between two dates? How to get difference between two dates?

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long diffInMilli = java.time.Duration.between(dateTime1, dateTime2).toMillis();
long diffInMilli = java.time.difference(dateTime1, dateTime2).toMillis();
Date diffInMilli = java.time.Duration.between(dateTime1, dateTime2).toMillis();
Time diffInMilli = java.time.Duration.between(dateTime1, dateTime2).toMillis();

If an expression contains double, int, float, long, then the whole expression will be promoted into which of these data types? If an expression contains double, int, float, long, then the whole expression will be promoted into which of these data types?

1 Mark(s)

long
int
double
float

How to identify if a timezone is eligible for DayLight Saving? How to identify if a timezone is eligible for DayLight Saving?

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useDaylightTime() of Time class
useDaylightTime() of Date class
useDaylightTime() of TimeZone class
useDaylightTime() of DateTime class

Can you make an array volatile? Can you make an array volatile?

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TRUE
FALSE
TRUE
FALSE

What does LocalTime represent? What does LocalTime represent?

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Date without time
Time without Date
Date and Time
Date and Time with timezone

JAVA interview question set 17 : Question 1 of 30